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

The answer is; A

During a hot day, the land heats up faster than the waters. The air on land becomes warm and less dense fast and begin to rise in the atmosphere. The air on the ocean with is still cooler and denser moves in to replace the rising on land air. This causes a sea breeze. The sea breeze carries with it, moisture. The hotter the day the higher the humidity. When the air goes inland, it causes precipitation when it rises,  cool, and condenses.

Answer:

I got it Right

Explanation:

In Study Island

The very last option is the correct answer.

Answer: Option (4)

Explanation: For the formation of a tornado, warm air must meet the cold air.

Initially, the warm air present in the lower atmosphere, gets heated up, being less dense, rises up and mixes up with the cold and denser air mass present in the upper atmosphere. Due to this collision of both the air masses, and the presence of water vapor, it gets converted into water droplets and formation of clouds. With time a more intense funnel forms due to the wind from all direction and forms a tornado.

Thus, the correct answer is option (4).

This problem can be solved by Dalton's law of  partial pressures which states that  in a mixture of non-reacting gases, the total pressure exerted is equal to the sum of the partial pressures of the individual gases.

Ptotal = P₁ + P₂ + P₃ + ..... + Pn

Herein, Ptotal = P(Ne) + P(Ar) + P(He)

Ptotal = 1.25 atm, P(Ne) = 0.68 atm and P(Ar) = 0.35

So, P(He) = Ptotal - P(Ne) - P(Ar) = 1.25 - 0.68 - 0.35 = 0.22 atm

Answer:

0.22 atm

Explanation:

took test

Answer: Chemical Reactions, Acids, and Bases Unit Test

1. 24 mL of Mg burn in 32mL O2 to produce 56 mL of MgO

2. 92.4

3. Bonds of the reactants are broken, and bonds of the products are formed

4. The reaction rate decreases

5. in chemical equilibrium

6. The equilibrium shifts to the right and more products are formed

7. the I ion and the positive end of a water molecule

8. Less than 0 degree Celsius

9. Greater than

10. Solubility

11. feels slippery

12. MgCl2 and H2O

13. accept a proton and become NH4+

14. stay about the same

15. electrolyte

These are the answers I put for the short answers:

16. The double-replacement is KBr+. The resulting compound is AgNO3+AgBr

17. The ion that is formed is Br. The bromine gets reduced

18. Buffer solution is a solution that is resistant to large changes in pH

19. The peaks are called the activation energy. It is energy used to get the reaction going.

20. It is supersaturated

21. According to the figure above detergent is a base

Part 2: These are the answers that I put as well

1. 4Fe+3O2=2Fe2O3  3:2

2. 1.31M

3. 300mg of water

4. 60.46 kJ would be absorbed during the reaction

The correct answer is C. A positive calcium ion and a negative oxygen ion

Explanation:

In chemistry, an ionic bond occurs as ions with opposite charges attract each other and then create a bond due to the transference of electrons from one atom to other. This means, this type of bond occurs between an atom that is positively charged and one that is negatively charged, therefore, the two particles that can form an ionic bond are "A positive calcium ion and a negative oxygen ion" because these two have opposite charges (one is positively charged and one is negatively charged) and therefore electrons can be transferred from one atom to another forming an ionic bond.

D - are more organized

Answer: Are less organized

Explanation:

The formation of a solid has to do with a very ordered arrangement of molecules in a regular repeating pattern. The arrangement of molecules must be neat enough to allow close packing of the ordered arrangement. Ionically bonded species have a neat arrangement of oppositely charged ion pairs. This accounts for their abundant existence in the solid state. There is less order in the packing of covalent molecules as they as mostly held by weak intermolecular forces. Hence they exist mostly as liquids and gases.

The correct answer is option D, that is, increased coastal flooding.  

The change in climate is enhancing the frequency of coastal flooding, comprising floods just from tides. The combination of melting of ice into the oceans and expansion of water as the ocean has warmed has increased the level of the sea up to about seven inches since 1900, and the elevation is on the rise.  

From 2005 to 2015, the average number of floods has doubled along the stretch of coast from Florida to North Carolina. The flooding will become even more usual in the coming time as the concentration of greenhouse gases discharged into the atmosphere will increase the levels of the sea in years to come.  

A hazardous chemical instantly discharging gas, pressure, and heat when subjected to pressure, heat, or high temperature is categorized under hazard class I explosives by the Department of Transportation.  

These are the explosives that possess the tendency to briskly detonate or conflagrate as an outcome of the chemical reaction. The explosives possess the tendency of generating pressures, temperatures, and speeds as leading to catastrophic destruction via force and/or of generating otherwise hazardous concentrations of light, heat, gas, sound, or smoke, all this resulting due to chemical reactions.  

NaCl(s)=NaCl(aq) is a physical change as it represents a state change from solid to aqueous but retains the same chemical nature, Sodium Chloride (NaCl). The other choices show chemical changes.

The correct option is c.

The question is asking which of the choices represents a physical change. A physical change involves changes in the state of a substance but not its chemical nature. The best answer here is option C: NaCl(s)=NaCl(aq). In this reaction, solid sodium chloride (NaCl) is dissolving in water to form an aqueous solution, which is just a change in the state from solid to aqueous but the chemical nature (NaCl) remains the same. This is a clear demonstration of a physical change whereas options A, B, and D show chemical changes where new substances are formed.

https://brainly.com/question/17931044

#SPJ3

C. [tex]NaCl(s) \rightarrow NaCl(aq)[/tex]  shows a physical change.

A physical change is a type of change in which the form of matter is altered, but one substance is not transformed into another. Examples of physical changes include changes in state such as melting, freezing, and dissolving.

A. [tex]H_2(g) + O_2(g) \rightarrow H_2O(l)[/tex]
This is a chemical change because new substances with different chemical properties are formed: hydrogen and oxygen combine to form water.

B. [tex]2CH_3OH(l) + 3O_2(g) \rightarrow 2CO_2(g) + 4H_2O(l)[/tex]
This is another chemical change, involving the combustion of methanol to form carbon dioxide and water.

C. [tex]NaCl(s) \rightarrow NaCl(aq)[/tex]
This is a physical change. When sodium chloride (table salt) dissolves in water, it dissociates into ions but does not undergo any chemical change.

D. [tex]2AgNO_3(aq) + CaBr_2(aq) \rightarrow 2AgBr(s) + Ca(NO_3)_2(aq)[/tex]
This is a chemical change, where silver nitrate and calcium bromide react to form silver bromide and calcium nitrate, both of which are new substances.

Final answer:

The triple point on a phase diagram represents the only combination of temperature and pressure at which all three phases can exist simultaneously and are in equilibrium.

Explanation:

The triple point on a phase diagram refers to the point where the solid/liquid, liquid/gas, and solid/gas lines intersect. It represents the only combination of temperature and pressure at which all three phases can exist simultaneously and are in equilibrium. An example is the triple point of water, which occurs at 273.16 K (0.01°C). At this point, water can exist simultaneously as solid ice, liquid water, and water vapor.

Answer: by lowering the activation energy.

Explanation:

Activation energy is the extra energy that must be supplied to reactants in order to cross the energy barrier and thus convert to products.

A catalyst is a substance which increases the rate of a reaction by taking the reaction through a different path which involves lower activation energy and thus more molecules can cross the energy barrier and convert to products.

The catalyst itself does not take part in the chemical reaction and is regenerated as such at the end.

The correct answer is D

Answer:

It was frozen.

Explanation:

A substance may undergo any chemical change in its nature in all the given cases except when it is frozen.

A) during heating there is chances that it undergoes decomposition . Like if calcium carbonate is heated it converts to calcium oxide and carbon dioxide.

B) When a compound is hit with a hammer there is chance of its chemical decomposition.

C) If a compound is placed in a salt solution it may react with the salt or water.

D) However freezing is purely a physical process, where contact with any other compound or any chance of chemical decomposition is not possible.

The answer is letter D. Reactants, Products

he can lift 440.925 pounds

Macho Mel can lift approximately 440.924 pounds, as 200 kilograms is equal to 440.924 pounds when using the conversion factor of 1 kilogram being approximately 2.20462 pounds.

To convert kilograms to pounds, one must use the conversion factor where 1 kilogram equals approximately 2.20462 pounds. So, by multiplying 200 kilograms by this conversion factor, we find that Macho Mel can lift:

200 kg x 2.20462 lbs/kg = 440.924 lbs

Therefore, Macho Mel can lift 440.924 pounds with ease.

The electrostatic attraction between positively charged nuclei and negatively charged electrons permits two atoms to be held through either a covalent bond, where the electrons are shared between atoms, or an ionic bond, where one atom donates or accepts an electron from the other, creating ions which are attracted to each other.

The electrostatic attraction between positively charged nuclei and negatively charged electrons allows two atoms to be held together through what is known as a covalent bond or an ionic bond. In a covalent bond, these forces of attraction are between the nuclei of a molecule's atoms and pairs of electrons between these atoms. For instance, in an oxygen molecule O₂, the electrons are equally shared between the atoms, establishing a covalent bond.

On the other hand, in an ionic bond, a atom donates or accepts an electron resulting in a positively or negatively charged atom, termed as an ion. For example, a sodium (Na) atom can donate its 2s electron to a chlorine (Cl) atom. This results in a positively charged Na+ ion and a negatively charged Cl- ion. The electrostatic attraction between these charged ions creates an ionic bond and forms a salt molecule (NaCl).

https://brainly.com/question/14889552

#SPJ3

Empirical Formula = C20 H60 HG1 S1 O4 (numbers should be in subscript)

Percent Composition =

MG = 43%

S = 56.8%

Hey there!

"Which process responsible for the growth a repair of human tissue?"

Well, it heals itself which is called the mitosis but none of those are your answer choices .. the one that seems to be closer to those two results would be: Option 3. [tex]\boxed{cell-division}[/tex]

Therefore, your answer would most likely be: [tex]\boxed{cell-division}[/tex]

Good luck on your assignment and enjoy your day!

~[tex]LoveYourselfFirst:)[/tex]

Answer: [tex]5.2\times 10^{22} atoms[/tex] of iodine are present in 12.75 grams of [tex]CaI_2[/tex].

Explanation:

[tex]moles=\frac{\text{given mass of the compound}}{\text{molar mass of the compound}}[/tex]

Moles of Calcium iodide :

Moles of [tex]CaI_2=\frac{12.75 g}{293.8 g/mol}=0.0433 moles[/tex]

number of molecules of [tex]CaI_2[/tex] in 0.0433 moles = [tex]N_A\times \text{number of moles}=6.022\times 10^{23}\times 0.0433=2.60\times 10^{22} molecules [/tex]

In one molecule of calcium iodide there are two iodine atoms, then number of iodine atoms in [tex]2.60\times 10^{22} molecules [/tex] of [tex]CaI_2[/tex]

[tex]2\times 2.60\times 10^{22} atoms=5.2\times 10^{22} atoms[/tex]

Hence, there are [tex]5.2\times 10^{22} atoms[/tex] of iodine are present in 12.75 grams of [tex]CaI_2[/tex].

Ice caps would float therefore providing insulation for aquatic life and ensuring they do not freeze due to the cool temperature.

Answer: (2) Black bears have 74 chromosomes and 37 haploid chromosomes. (3) The bears become s3xually mature anywhere from 3-7 years. (4) There are two types of reproductive barriers: Prezygotic and Postzygotic.

Explanation:

37 chromosomes are in the black bears sex cells bears,Sex cells only contain half the number of chromosomes found in the body cells.

The body cell of an American black bear contains 74 chromosomes, then each sex cell contains 37 chromosomes.

To learn more about chromosomes refer:https://brainly.com/question/11912112

#SPJ2

The formation of bubbles and the change in color of the food item are signs of a chemical reaction, indicating the production of gas and the creation of new substances.

When a food item left out of the refrigerator turns brown, forms bubbles, and releases gas, the signs that a chemical reaction has occurred include the production of gas (evidenced by bubbles) and a change in color. These are key indicators that the original substances have undergone a chemical change to form new substances with different properties. While heat can be absorbed or produced during a chemical reaction, the question does not specify that this occurred, and there is no mention of a precipitate being formed.

Answer: The mass of iron recovered is 17.5 grams

Explanation:

We are given a chemical compound having chemical formula of [tex]Fe_2O_3[/tex]

We know that:

Molar mass of iron (III) oxide = 159.7 g/mol

Mass of iron = 55.8 g/mol

We are given:

Mass of iron (III) oxide = 25 g

To calculate the mass of iron recovered in given amount of iron (III) oxide, we use unitary method:

From 159.7 grams of iron (III) oxide, mass of iron recovered is [tex](2\times 55.8)g[/tex]

So, from 25 grams of iron (III) oxide, mass of iron recovered will be [tex]\frac{(2\times 55.8)}{159.7}\times 25=17.5g[/tex]

Hence, the mass of iron recovered is 17.5 grams

The iron that will be recovered from 25 g of [tex]\bold{Fe_2O_3}[/tex] is

Ferric oxide is an organic compound with the chemical formula [tex]\bold{Fe_2O_3}[/tex]. It is one of the three main oxides of iron.

Given,

Mass of [tex]\bold{Fe_2O_3}[/tex] is 25 gram

Molar mass of iron oxide is 159.7

Mass of iron is 55.8 g

To calculate the amount of iron

From 159.7 g of ferric oxide, the amount of iron we found is [tex]55.8\;g \times 2[/tex]

So, from 25 grams of ferric oxide, the mass of iron recovered will be

[tex]\dfrac{55.8 \times 2}{159.7} \times25 = 17.5 g[/tex]

Thus, the mass of iron recovered is 17.5 g.

Learn more about ferric oxide, here:

https://brainly.com/question/24389121

The answer is D-Nitrogen(N).

Nitrogen has three unpaired valence electrons, therefore, it can form three covalent bonds.

Drinking one standard drink will increase your BAC by about 0.02 (remember this can depend on the factors mentioned above). As your BAC rises, so does your risk of being involved in a crash. This is why drivers with an open licence have to keep under a BAC of 0.05.

Final answer:

The correct answer is "move faster". When a solid is heated, the particles that compose it move faster due to an increase in their average kinetic energy. The solid may expand overall, but the individual particles do not get bigger, lose mass, or slow down. The temperature rise is an indication of the increased vibrational motion of the particles within the solid.

Explanation:

When you heat a sample of a solid, the particles that make up the solid move faster. This happens because heating a substance increases the amount of thermal energy, which then increases the average kinetic energy (KE) of the particles. At a microscopic level, a solid consists of molecules and atoms vibrating quickly in place when hot, and moving slowly when cold, without any chemical reaction or phase change like melting or vaporizing. In a solid, these particles are in a constant state of vibration, and as they are heated, they gain energy and vibrate more quickly, which we interpret as an increase in temperature.

As the temperature rises, it's an excellent approximation that solids expand in each dimension by a specific fraction, assuming no constraints on their expansion. However, the particles themselves do not get bigger, lose mass, or slow down when heated. Instead, the increase in temperature may cause the solid to expand overall, while the proportions of the solid remain constant. This is because the interaction potential curve between particles is usually asymmetric, becoming less steep at greater distances and showing an increase in equilibrium particle-particle distance when the substance is heated.

If we consider endothermic processes like melting, the added heat increases the speed of the molecules causing them to move faster. In contrast, exothermic processes like freezing decrease the speed of the molecules causing them to move slower. Hence, the correct answer is that the particles move faster when a solid is heated.

Answer:

2500

Explanation:

Answer: The correct answer is Option A.

Explanation:

From the given options:

A. Ionic bonds: These bonds are formed when there is complete transfer of electrons from one atom to another atom. An atom which looses electrons is known as electropositive atom and the atoms which gains electrons is known as electronegative atom.

B. Covalent Bonds: These bonds are formed when there is sharing of electrons between the two atoms.

C. Metallic bonds: These bonds are formed from the attraction between the free electrons and fixed positively charged of two metallic atoms.

D. Polyatomic Bonds: These bonds are formed between the species forming a polyatomic ion.

From the given information, the correct answer to this question is Option A.

Answer:

The correct answer here is ionic bond

Explanation: