what kind of mixture is shaving cream
What are the differences between thermoplastics and thermosetting plastics? Give examples and draw a simple diagram to show what kind of linkages are there in the polymer chains.
on the basis of the reaction of heat in plastic , their are two types of plastics :
Thermoplastic & Thermosetting plasticsThermoplastics : Plastics which easily get deformed (become soft )on heating and also get bend easily are known as thermoplastics .
examples : polythene , polyvinyl chloride and polystyrene .
thermosetting plastics : plastics which once moulded into a shape do not become soft on heating and cannot be moulded again are called thermosetting plastics .
examples : bakelite , melamine and formica
BRAINLIEST HELP PLEASE!!!!
1) The table below shows the volume of two samples, X and Y, when placed in three containers of different volumes.
Volume of Samples
Volume of Container Volume of Sample X Volume of Sample Y
200 mL 200 mL 200 mL
500 mL 200 mL 500 mL
600 mL 200 mL 600 mL
Which of the following correctly describes the state of matter of one of the samples?
Y is a gas because it has a definite volume.
X is a liquid because it has a definite volume.
Y is a liquid because it fills up the entire container.
X is a gas because it fills up the entire container.
2) The table below shows the dimensions of two colored cubes.
Dimensions of Cubes
Cube Side (cm) Mass
(g)
Yellow 3 135
Black 2 48
Which cube is denser?
Black, because it has less volume and less mass.
Yellow, because it has more volume and more mass.
Black, because the product of its side and mass is lower.
Yellow, because the product of its side and mass is higher.
Answer:
1)B X is a liquid because it has a definite volume.
2)D White, because it has less volume, but a lot more matter.
Do not pick black it it wrong
take a look
(1) In the given samples of X and Y, the definite volume has been observed for sample X. Thus, X has been a liquid. Hence, option B is correct.
(2) The yellow box has been denser, as the product of mas and side has been higher. Thus, option D is correct.
The volume of the substance has been defined as the space occupied by the matter. The mass of substance has been the product of density and volume.
Volume and Density of matter(1) The state of matter has been based on the intermolecular attractions. The solid state has definite shape and volume.
Liquid has definite volume, but no defined shape. While gases have no definite volume and shape.
In the given samples of X and Y, the definite volume has been observed for sample X. Thus, X has been a liquid. Hence, option B is correct.
(2) The density has been defined as mass per unit volume.
The volume of cube has been given as:
[tex]\rm Volume=a^3[/tex]
Where, a has been the side of the cube
The density has been expressed as:
[tex]\rm Density=\dfrac{Mass}{Volume}[/tex]
Thus, the object with lower volume and more mass has been denser than the other.
The yellow cube has mass 135 g, and volume 27 cubic centimeters
The black cube has mass 48 g, and volume 8 cubic centimeters.
The yellow box has been denser, as the product of mas and side has been higher. Thus, option D is correct.
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Scientists predicted Adamantium would have an Atomic radius of 327 pm. Once the element was measured experimentally, they found that the atomic radius was really 312 pm. Calculate the percent error of their prediction
The actual atomic radius of Adamantium is 327pm. The experimentally estimated value of atomic radius of adamantium is 312pm. The percent error can be calculated as,
Percent error = (actual value-estimated value)/actual value *100
= 327-312/327*100
=Approx. 5 percent error in their prediction.
Im an experiment , the group that is exposed to the variable to be tested is called the ?
The correct answer is the experimental group.
A group in an experiment, which receives the variable being tested is known as an experimental group. One variable is being examined at a time. The experimental group is compared with a control group that does not get the test variable. In this manner, experimental groups are used to determine the answers in an experiment.
The experimental group is the group in an experiment that is exposed to the variable being tested. This group undergoes the experimental manipulation, while the control group does not. Any differences observed between the two could be attributed to the experimental manipulation.
Explanation:In a typical experimental design, the group that is exposed to the variable being tested is known as the experimental group. This group undergoes the experimental manipulation, whereas the counterpart, the control group, does not. Both of these groups are sent through all phases of the experiment. However, the experimental group experiences a different level of the independent variable due to the experimental manipulation.
For example, if a researcher were testing the effect of a new tutoring approach on student performance, the experimental group would receive this new method of tutoring, while the control group would continue with the traditional method. After a set period, the researcher would compare the performances, looking for differences that could be attributed to the new tutoring approach, i.e., the experimental manipulation.
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Which type of telescope would perform better on a mountaintop than at a lower elevation?
when an optical telescope located on the ground is used to view the sky the image has to surpass through the earth's atmosphere which is polluted. so the resolution wont be clear. When viewed on a mountain top both optical and infrared telescopes would perform better as the air above the atmosphere is less depth and cleaner.
What is the mass of oxygen in 300 grams of carbonic acid (H2CO3)
The mass of oxygen in 300 grams of carbonic acid (H2CO3) can be determined by calculating the mass percent of oxygen, which is found to be 77.4%. Therefore, the mass of oxygen in 300 grams of carbonic acid is 232.2 grams.
Explanation:Calculating Mass of Oxygen in Carbonic AcidThe task is to find the mass of oxygen in 300 grams of carbonic acid (H2CO3). Carbonic acid consists of 2 hydrogen atoms, 1 carbon atom, and 3 oxygen atoms. The molar mass of carbonic acid is therefore 2(1.008 g/mol) + 12.01 g/mol + 3(16.00 g/mol) which equals 62.024 g/mol.
To find the mass percent of oxygen, we calculate the total mass of oxygen in one mole of carbonic acid, which is 3(16.00 g/mol) = 48.00 g/mol. The mass percent of oxygen is then (48.00 / 62.024) × 100 = 77.4%. Therefore, in 300 grams of carbonic acid, the mass of oxygen is 300 g × 0.774 = 232.2 grams.
By comparing the ratio of mass of oxygen to the total mass in carbonic acid, we were able to determine how much oxygen is present in a given mass of the compound. This process is a basic stoichiometry calculation commonly performed in chemistry.
Describe an ionic bond in terms of the atoms' electronegativity values and what has happened to the electrons involved in the bond.
An ionic bond forms between two atoms due to significant electronegativity difference. One atom loses electrons to become a cation while the other gains these electrons to become an anion. These oppositely charged ions attract each other to form the bond.
Explanation:An ionic bond is a type of chemical bond that forms between two atoms with significantly different electronegativity values. This difference causes one atom (usually a metal) to lose electrons, becoming a positively charged cation, while the other atom (usually a non-metal) gains these electrons, becoming a negatively charged anion. The attraction between these two opposite charges is what forms the ionic bond. For example, in sodium chloride (NaCl), sodium (Na) loses one electron to become Na+ and chlorine (Cl) gains this electron to become Cl-, forming an ionic bond.
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An ionic bond is formed by the transfer of electrons between atoms with significant differences in electronegativity, typically a metal and a non-metal.
This results in the formation of positively and negatively charged ions that are attracted to each other by electrostatic forces.
An example of this is the formation of sodium chloride (NaCl).An ionic bond is formed through the transfer of electrons from one atom to another. This usually occurs between a metal and a non-metal due to their significant difference in electronegativity. The metal atom, having lower electronegativity, loses one or more electrons to become a positively charged ion or cation. Conversely, the non-metal atom, with higher electronegativity, gains these electrons to form a negatively charged ion or anion. These oppositely charged ions are then attracted to each other by electrostatic forces, holding them together in a 3D crystal lattice structure.Example: In the formation of sodium chloride (NaCl), sodium (Na) loses one electron to become Na+, and chlorine (Cl) gains that electron to become Cl-.The resulting Na+ and Cl- ions are attracted to each other, forming a stable ionic compound.
The symbol for the hydroxide ion is _____. H + H 3 O - H(OH) OH -
Answer: OH-
Explanation:
The awnser is OH- trust me. I learned it in school.
Water vapor is condensed steam.
True
False
The statement is false. Water vapor is the gaseous state of water, while condensed steam is liquid water. Water vapor can become 'condensed', or turned into liquid, through a process called condensation.
Explanation:The statement 'Water vapor is condensed steam' is False.
Water vapor is the gaseous state of water, which is commonly formed from the evaporation or boiling of liquid water or from the sublimation of ice. Condensed steam, on the other hand, refers to steam, or water vapor, that has been cooled down to return to its liquid state - this process is known as condensation.Therefore, condensed steam would be liquid water, not water vapor.
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24 g of magnesium were burned in oxygen. The compound formed had a mass of 40 g. Explain why the mass had gone up.
Answer :
According to the law of conservation of mass, the mass of reactants must be equal to the mass of products.
The balanced chemical reaction is,
[tex]Mg+\frac{1}{2}O_2\rightarrow MgO[/tex]
As we know that the molar mass of magnesium is 24 g/mole, the molar mass of [tex]O_2[/tex] is 32 g/mole and the molar mass of magnesium oxide is 40 g/mole.
From the given balanced reaction, we conclude that
As, 1 mole of magnesium react [tex]\frac{1}{2}[/tex] mole of oxygen to give 1 mole of magnesium oxide.
So, the mass of Mg is 24 g, the mass of [tex]O_2=\frac{1}{2}\times 32=16g[/tex] and the mass of MgO is 40 g.
That means 24 g of Mg react with 16 g [tex]O_2[/tex] to give 40 g of MgO.
The mass increased when magnesium burnt in oxygen because magnesium combines with oxygen to form magnesium oxide. This compound is heavier than the original magnesium because it includes the mass of both magnesium and oxygen.
Explanation:The mass increased when 24 g of magnesium was burnt in oxygen because magnesium combines with oxygen in the air to form a compound. This is fundamentally due to magnesium's affinity for oxygen. The resulting compound, magnesium oxide (MgO), has a higher mass because it combines the masses of both magnesium and oxygen. The reaction can be written as: 2Mg(s) + O2(g) → 2MgO(s). Here, oxygen from the air adds additional mass, resulting in a final product that is heavier than the original magnesium.
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Although burning waste is one way to reduce garbage that goes into landfills, it has negative enviromental consequences. Which of the following is a possible negative consequence of burning waste
What are the options you have?
Which acid was most likely used for the titration graph below.
Answer: HCOOH OR METHANOIC ACID
Explanation:
The titration graph displays the running of alkali or base into an acid. The start of the graph displays a rapid or quick rise in pH but this slows down as a buffer solution contains HCOOH and the unknown base or alkali are produced.
a certain skin lotion is a fine mixture of water and various oils. this lotion is cloudy and cannot be separated into oil and water by filtration. moreover, it’s compon do not separate when left standing. what type of mixture is it?
Answer: The skin lotion is a colloidal mixture of water and various oils.
Explanation:
Mixture: Blend of of two or more components which are chemically unreactive to give any product.
Mixture are defined as of three types:
Solutions : Mixture in which one component is completely distributed in an other component resulting in clear mixture. They cannot be separated into its components on standing or by filtration.
Suspensions: Mixture in which one component is not completely or uniformly distributed in another component.They separate out into layers when kept undisturbed.
Colloids: Mixture in which one component is uniformly distributed in another component but the mixture formed is not clear. The color of mixture appears turbid or cloudy. They cannot get separated by filtration. They also cannot get separated into its components when left standing.
A skin lotion is a fine mixture of water and oils. it is a cloudy mixture and cannot be separated with help of filtration. Also its components also not separates out on standing. All these properties shown by skin lotion is of colloidal mixture.
What is the second step in the classification of living things?
A.) Assigning them to any of the 6 domains
B.) Assigning them to any of the 3 domains
C.) Assigning them to any of the 6 kingdoms
D.) Assigning them to any of the 3 kingdoms
Answer:
B.) Assigning them to any of the 3 domains
Explanation:
The second step in the classification of living beings is to assign them to any of the three domains. There are not six domains. Furthermore, there are neither six nor three kingdoms, there are 5 kingdoms.
The three domains are:
→ Bacteria Domain: It groups most of the unicellular prokaryotes, such as bacteria and cyanobacteria.
→ Domain Archaea: It groups prokaryotes with different biochemical characteristics and that usually inhabit regions with extreme conditions.
→ Eukaria domain: It groups all unicellular and multicellular eukaryotic organisms, such as fungi, animals, plants and organisms previously classified as protists.
An electrical shock happens when electric _______ enters the body at one point and leaves through another.
A reflex response to the passage of electric current through the human body and results when electric current enters the body at one point and leaves through another. With that being said, your answer should be an eltrical shock happens when electrical CURRENT enters the body at one point and leaves through another.
Answer:An electrical shock happens when electric current enters the body at one point and leaves through another.
Explanation:An electric shock happens when someone comes into contact with any source of electrical energy. This can be due to a lightning strike or due to a man-made source of electricity such as electrical circuits or appliances. The shock occurs when the electricity flows through the body.
If 7.99 moles of C5H12 reacts with excess O2, how many moles of CO2 will be produced in the following combustion reaction? C5H12 + 8O2 = 6H2O + 5CO2
According to stoichiometry and the balanced equation, 7.99 moles of C5H12 will produce 39.95 moles of CO2.
Explanation:The subject matter of this question is stoichiometry in chemistry. The balanced chemical equation in the question is C5H12 + 8O2 = 6H2O + 5CO2. Here, we can see that 1 mole of pentane (C5H12) reacts to form 5 moles of carbon dioxide (CO2). This is a 1:5 ratio. Therefore, if we have 7.99 moles of C5H12, we would expect to produce five times that amount of CO2 because of this 1:5 ratio. Consequently, 7.99 moles of C5H12 will form 7.99 * 5 = 39.95 moles of CO2.
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Which issue is a limitation of using synthetic polymers? Check all that apply.
As trash, synthetic polymers are not biodegradable.
Landfills can easily fill up with synthetic polymers.
Plastics can be made into many different products.
Recycling synthetic polymers is costly.
Synthetic polymer production is not expensive.
Synthetic polymers can be produced in big quantities.
Answer:
1,2,4
Explanation:
As trash, synthetic polymers are not biodegradable.
Landfills can easily fill up with synthetic polymers.
Recycling synthetic polymers is costly.
These are the correct ones not the ones the other dude said.
The main problems with synthetic polymers are that they aren't biodegradable, contributing to landfill issues, and recycling them can be quite expensive.
Explanation:The primary limitations of using synthetic polymers, such as plastics, are that they are not biodegradable, which can lead to accumulation in landfills, and recycling them can be costly. Synthetic polymers, while versatile in application, present serious issues when disposed of. Synthetic polymers do not easily decompose and can persist in the environment for many decades, greatly contributing to landfill overflow. Additionally, the process to recycle polymers is intricate, involving sorting, cleaning and melting materials to be reused. This tends to be expensive and often not economically viable at larger scales.
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For the following reaction if you have 13.2g of CO and 42.7g of Fe2O3, which is the limiting reagent with regards to the Fe production? Fe2O3(s) + 3CO (g) —> 2Fe(s) + 3 CO2 (g)
Answer: CO is a limiting reagent with regards to the Fe production.
Explanation:
[tex]Fe_2O_3(s)+3CO(g)\rightarrow 2Fe(s)+3CO_2(g)[/tex]
Moles of CO = [tex]\frac{\text{mass of CO}}{\text{molar mass of CO}}=\frac{13.2 g}{28 g/mol}=0.4714 mol[/tex]
moles of [tex]Fe_2O_3=\frac{\text{mass of} Fe_2O_3}{\text{molar mass of}Fe_2O_3}=\frac{42.7 g g}{159.7 g/mol}=0.2673 mol[/tex]
According to reaction , 3 mole of CO reacts with 1 mole of [tex]Fe_2O_3[/tex] then , 0.4714 moles of CO will react with : [tex]\frac{1}{3}\times 0.4714 [/tex] moles of [tex]Fe_2O_3[/tex] that is 0.1571 moles.
0.4714 moles of CO will react with 0.1571 moles of [tex]Fe_2O_3[/tex] which means that CO is present in limited amount acting as limiting reagent.
Mole remaining of [tex]Fe_2O_3[/tex] = 0.2673 mol - 0.1571 mol = 0.1102 mol
Hence, CO is a limiting reagent and [tex]Fe_2O_3[/tex] is an excessive reagent.
how many moles of sulfur will be needed to oxidize 3 moles of zinc to zinc sulfide
Final answer:
To oxidize 3 moles of zinc to zinc sulfide, 3 moles of sulfur are needed based on the 1:1 molar ratio of the balanced chemical equation Zn + S → ZnS.
Explanation:
The question, 'how many moles of sulfur will be needed to oxidize 3 moles of zinc to zinc sulfide?' involves a stoichiometric calculation based on a balanced chemical reaction. The reaction between zinc (Zn) and sulfur (S) to form zinc sulfide (ZnS) is represented by the balanced equation:
Zn + S → ZnS
According to the equation, the molar ratio of zinc to sulfur is 1:1. This means that for every mole of zinc, one mole of sulfur is required. Therefore, to oxidize 3 moles of zinc, 3 moles of sulfur will be needed to produce zinc sulfide (ZnS).
according to the kinetic theory as the volume of a gas increase
According to Boyle's Law, it has been observed that as the pressure of a gas increases, the volume of the gas decreases. The Kinetic Theory of gases explains this observation with which of the following statements: The gas particles strike the walls of the container more often.
hope this helps brainliest will help me thanks :D
47.0 ml of an HBr solution were rotated with 37.5 ml of a 0.215 m lioh solution to reach the equivalent point. What is the molarity of the hbr solution
The molarity of the HBr solution is 0,172 M.
The neutralization reaction between LiOH and HBr is the following:
HBr(aq) + LiOH(aq) → LiBr(aq) + H₂O(l)
Answer:
0.172 mol·L⁻¹
Step-by-step explanation:
1. Write the chemical equation for the reaction.
HBr + LiOH ⟶ LiBr + H₂O
===============
2. Calculate the moles of LiOH
c = n/V Multiply each side by V
n = Vc
V = 0.0375 L
c = 0.215 mol·L⁻¹
Moles of LiOH = 0.0375× 0.215
Moles of LiOH = 8.062 × 10⁻³ mol LiOH
===============
3. Calculate the moles of HBr
1 mol HBr ≡ 1 mol LiOH
Moles of HBr = 8.062 × 10⁻³× 1/1
Moles of HBr = 8.062 × 10⁻³ mol HBr
===============
4. Calculate the molar concentration of the HBr
V = 47.0 mL = 0.0470 L
c = 8.062 × 10⁻³/0.0470
c = 0.172 mol·L⁻¹
A 20 L cylinder of gas at 5.6 atm pressure at 35 degrees Celsius is heated to 95 degree Celsius and compared to 23 atm. What is the new volume?
Answer:
5.8 L
Step-by-step explanation:
This looks like a case where we can use the Combined Gas Law to calculate the temperature.
p₁V₁/T₁ = p₂V₂/T₂ Multiply both sides by T₂
p₁V₁T₂/T₁ = p₂V₂ Divide each side by V₂
V₂ = V₁ × p₁/p₂ × T₂/T₁
=====
Data:
p₁ = 5.6 atm
V₁ = 20 L
T₁ = 35 °C = 308.15 K
p₂ = 23 atm
V₂ = ?
T₂ = 95 °C = 368.15 K
=====
Calculation:
V₂ = 20 × 5.6/23 × 368.15/308.15
V₂ = 20 × 0.243 × 1.19
V₂ = 5.8 L
which of the following is not an appropriate unit for momentum?
g•m/s
kg•m/hr
km•m/s
g•cm/min
Answer: Option (c) is the correct answer.
Explanation:
Momentum is the product of mass and velocity.
Mathematically, p = m × v
where p = momentum
m = mass
v = velocity
It is known that mass can be measured in Kilograms or grams. Whereas velocity is measured in meter per second or centimeter per minute or hour.
On the other hand, unit kilometer is a unit of distance and not mass.
Thus, out of the given options km.m/s is not an appropriate unit for momentum.
The answer is: km•m/s.
Momentum is the product of the mass and velocity of an object. It is a vector quantity, possessing a magnitude and a direction in three-dimensional space.
km (kilometer) is not unit for the mass, it is unit for distance.
For example:
p(ball) = 218 kg·m/s; momentum of a ball.
the amount of work done depends on the amount of force applied and the distance the distance the object moves.
a. true
b. false
Answer:
True
Explanation:
How much force is applied & how far the force causes the object to move
Which is the correct electron configuration for the element Molybdenum (Mo)?
a
1s22s22p63s23p64s23d4
b
1s22s22p63s23p64s23d104p65s6
c
1s22s22p63s23p64s24d104p65s25d4
d
1s22s22p63s23p64s23d104p65s24d4
The correct electron configuration for the element Molybdenum (Mo) is;
a
1s22s22p63s23p64s23d4
b
1s22s22p63s23p64s23d104p65s6
c
1s22s22p63s23p64s24d104p65s25d4
d
1s22s22p63s23p64s23d104p65s24d4
Answer:
The correct answer is option d "1s22s22p63s23p64s23d104p65s24d4".
Explanation:
The electron configuration of an element is given by the distribution of its electrons in their different orbitals. In the case of Molybdenum (Mo), it has a total of 42 electrons, distributed in 10 orbitals. The correct electron configuration of Molybdenum (Mo) is 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d4, where the last number in each orbital represents the number of electrons (2 + 2 + 6 + 2 + 6 + 2 + 10 + 6 + 2 + 4 = 42).
Treating one coworker better than others is called vertical relationship. favoritism. harmony. socializing.
This is case of favoritism
vertical relationship is the relationship in a hierarchy, like up down relation
harmony: working in accordance with each other
Socializing: making social relationships with each other
MgCl2 + Na2O Nog+2NaC what type of chemical reaction is this
MgCl₂ +Na₂O →MgO + 2NaCl
the type of reaction above is double replacement reaction
explanation
Double replacement reaction is type of chemical reaction in which two compound react where positive ion (cation) and negative ion (anion) switch places forming two new compounds.
in reaction above the new compounds formed is MgO and NaCl as Mg²⁺ and O²⁻ switch their place to form MgO , while Na⁺ and Cl⁻ switch their place to form NaCl
under which conditions of temperature and pressure does oxygen gas behave least like an ideal gas
low temperature and high pressure so oxygen gas behave least like an ideal gas
Answer:High temperature and low pressure.
Explanation:
The ideal gas equation presupposes that the molecules of a gas are at infinite distances from each other hence they do not interact at all. This condition can only be satisfied at very high temperature and low pressure. At high temperature, the average kinetic energy of gas molecules is maximum hence they can move apart at great distances from each other. At low pressure, the gasses are relatively free from any kind of intermolecular forces. Hence oxygen will behave as an ideal gas at high temperature and low pressure.
Which circuit is a series circuit?
Answer : The correct series circuit is, (D)
Explanation :
Parallel circuit : In this circuit, the potential across each of the components are same but the current flow in the circuit is equal to the sum of the current flow of each components.
That means in this circuit, the potential across the circuit is same but current is different.
[tex]I=I_1+I_2+I_3[/tex] where, 'I' is current.
Series circuit : In this circuit, the current flow each of the components are same but the potential across the circuit is equal to the sum of the potential of each components.
That means in this circuit, the current flow across the circuit is same but potential is different.
[tex]V=V_1+V_2+V_3[/tex] where, 'V' is potential.
From the given circuits, the circuit D is the series circuit. while the other circuits are parallel circuits.
Hence, the given circuit (D) is a type of series circuit.
The circuit that can be said to be a series circuit is option D
What is a series circuit?An electrical circuit arrangement known as a series circuit is one in which all of the parts or devices are linked one after the other in a single channel, creating a single closed loop.
Because there is only one path for the current to travel, the same current passes through every component in a series circuit. Depending on each component's resistance or impedance, the voltage across the circuit is distributed among them.
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