Visible light, X Rays infrared radiation and radio waves all have the same

This answer varies. It would be B. because it's a large pot of water ( made of steel, iron or whatever ) and since it's a good conductor, it would transfer heat energy to the water and keep it warm.

It may not be A. because it's a small cup and the more molecules or matter it has the more thermal energy so it likely they would both be the same temperature.

Hope that helps.

Answer : The correct option is, Antacid and toothpaste.

Explanation :

The property of an acid is that they are sour in taste and the property of base is that they are bitter in taste.

In the given question, vinegar, orange juice are the acids and antacids, toothpaste are the bases.

Therefore, the option Antacid and toothpaste are likely to have a bitter taste.

Answer: The mole ratio of D : A is 3 : 2.

Explanation: Mole ratio for a chemical reaction is the ratio of their respective stoichiometric numbers or the ratio of their moles in a chemical reaction.

For a given chemical reaction:

[tex]2A+B\rightarrow C+3D[/tex]

By stoichiometry,

2 moles of A is reacting with 1 mole of B to produce 1 mole of C and 3 moles of D.

So, Mole ratio of D is to A will be 3 : 2

Answer:  D : A is 3 : 2.

Explanation:

The law of definite proportion is being used here. The law states that a given compound always has the same proportion of its constituent elements by mass. The numbers written in the equation are used to balance it, which is an important part whilst determining the mole ratio

Keeping in mind law:

2a + b => c + 3d

Using the concept of stoichiometry coefficients of d and a  

So the ratio of d:a is 3:2

your answer should be the last one: models should be used when needed to explain or predict data being represented.

hope this helps :)

Potassium hydroxide (KOH) is formed when Potassium forms ionic bonds with OH-ions while Potassium Oxide (K2O) is formed when potassium forms ionic bonds with the Oxide (O2-) ions. i.e. This reaction is a neutralization reaction and occurs when an acid (HCl) reacts with a base (KOH).

Answer: potassium chloride

Explanation:

Double displacement reaction is one which involves exchange of ions. Neutralization is a type of double displacement reaction in which an acid combines with a base to form salt and water, the reaction is called as neutralization reaction.

[tex]KOH+HCl\rightarrow KCl+H_2O[/tex]

Thus the salt formed is potassium chloride which has the chemical formula [tex]KCl[/tex].

Answer:

40 mL

Step-by-step explanation:

The pressure is constant.

The only variables are volume and temperature, so we can use Charles’ Law.

V₁/T₁ = V₂/T₂     Multiply each side by T₂

V₂ = V₁ × T₂/T₁

V₁ = 30 mL; T₁ = 273 K  

V₂ = ?;         T₂ = 364 K

V₂ = 30 × 364/273

V₂ = 40 mL

Final answer:

Fe(s) + PbSO4(s) = FeSO4(aq) + Pb(s)

Explanation:

The question involves a reaction where iron reacts with lead (II) sulfate, resulting in the formation of iron (II) sulfate and lead. This type of reaction is a single displacement reaction where a more reactive metal (iron) displaces a less reactive metal (lead) from its compound. To balance the reaction, we would write it as:

Fe(s) + PbSO4(s) = FeSO4(aq) + Pb(s)

Here, solid iron reacts with solid lead (II) sulfate to produce aqueous iron (II) sulfate and solid lead. This reaction is guided by the activity series, which predicts whether certain chemical reactions will occur based on the reactivity of the metals involved. In this case, since iron is more reactive than lead, it can displace lead from its sulfate compound.

Answer is: below magnesium in group 2 or in group 1 (left from magnesium).

Reactivity series is an empirical progression of a series of metals, arranged by their reactivity from highest to lowest (alkaline metals have highest reactivity and Noble metals lowest reactivity).

This series are used to summarize information about the reactions of metals with acids or water, double displacement reactions (more reactive metals displace metals with lower reactivity) and the extraction of metals from their ores.

Sodium and potassium (group 1 - alkaline metal) are more reactive than magnesium.

Strontium and barium (group 2 in periodic table) are higher in this group from magnesium. Strontium is stronger reducing agent than magnesium, gives electrons easier.

Answer : The final temperature of the gas must be [tex]33.596^oC[/tex]

Solution : Given,

Initial volume of gas = 2.49 L

Final volume of gas = 4.29 L

Initial temperature of gas = [tex]19.5^oC[/tex]

According to the Charles' law, the volume of gas is directly proportional to the temperature of the gas at constant pressure.

[tex]V\propto T[/tex]

[tex]\frac{V_1}{V_2}=\frac{T_1}{T_2}[/tex]

Now put all the given values in this formula, we get the final temperature of the gas.

[tex]\frac{2.49L}{4.29L}=\frac{19.5^oC}{T_2}[/tex]

By rearranging the term, we get

[tex]T_2==33.596^oC[/tex]

Therefore, the final temperature of the gas must be [tex]33.596^oC[/tex]

not be changed to balance an equationSubscripts are part of the chemical formula for reactants or products and can

Changing a subscript changes the substance represented by the formula

Subscripts are the identity of the element (the number of atoms) whereas coefficients are the number of molecules of the element.

If you change the subscript, you change the number of atoms an element has. This changes the entire element since each element in the periodic table have different atomic numbers.

False. <--- This is wrong I was thinking of atoms

Molecules do expand when they slowdown...

Hello.

The answer: A. True.

When mouecules slow down they can expend and this is how gas is made.

Have a nice day.

3600 miles! to get this answer you first need to know that  

60+60= 120  

then just times tht by 30 and you get 3600!

Final answer:

The car traveling at a constant speed of 30.0 m/s for 2 minutes covers a distance of 3600 meters.

Explanation:

To calculate the distance traveled by a car that moves at a constant speed, we can use the formula distance = speed × time. Given that the car travels at a constant speed of 30.0 m/s for 2 minutes, we first need to convert the time from minutes to seconds since the speed is given in meters per second.

There are 60 seconds in a minute, so 2 minutes equals 2 × 60 = 120 seconds.

Now, we can calculate the distance:

Distance = Speed × Time
Distance = 30.0 m/s × 120 s
Distance = 3600 meters

Therefore, the car has traveled a distance of 3600 meters.

Answer: [tex]2MgI_2+Mn(SO_3)_2\rightarrow 2MgSO_3+MnI_4[/tex]

Explanation:

Double displacement reaction: it is a chemical reaction in which the reactants  exchanges their ions to form new compounds as a products.

[tex]AB+CD\rightarrow AD+CB[/tex]

All the reaction are example of double displacement reaction beside reaction where magnesium iodide is reacting with manganese(II) sulfate to give magnesium sulfate and manganese(IV) iodide .

[tex]2MgI_2+Mn(SO_3)_2\rightarrow 2MgSO_3+MnI_4[/tex]

In this reaction , charge on manganese have changed from 2+ to 4+.  Manganese in getting oxidized. Example of an oxidation reaction. Hence, this reaction is not an example of double displacement reaction.

Density can be defined in terms of the mass of a substance present in a certain volume.

i.e. Density = Mass/ volume

It helps classify and identify matter due to the following reasons:

1) Density is an intensive property. For a given substance the density will remain the same irrespective of the amount in which it is present.

For example: The density of Aluminum (Al) = 2.7 g/cm3. This value is a constant at a certain temperature and pressure. Therefore, the density will remain the same for 1 kilogram or 1 mg of Al

2) Different elements/compounds have different values of densities which is characteristic of that substance

Most covalent compounds have relatively low melting points and boiling points.

Covalent compounds usually have lower enthalpies of fusion and vaporization than ionic compounds.

Covalent compounds tend to be more flammable than ionic compounds.

Covalent compounds are characterized by their lower melting and boiling points, poor conductivity, varied solubility in water depending on molecular polarity, and being typically gases or liquids at room temperature. These properties stem from the sharing of electrons between nonmetallic elements, forming covalent bonds.

Covalent compounds exhibit unique characteristics due to the sharing of electrons between nonmetallic elements. These shared electrons create bonds that are central to the distinct properties of covalent compounds. A deeper understanding of these properties highlights the differences between covalent and ionic compounds.

Key Properties of Covalent Compounds

In essence, covalent bonding results in compounds with distinct physical states and functionalities, emphasizing the diversity of chemical compounds and their varied applications.

6.69 g.

Make sure the chemical equation is balanced:

[tex]6\; \text{Li}\; (s) + \text{N}_2 \; (g) \to 2\; \text{Li}_3\text{N}\; (s)[/tex]

Assuming that one mole of N₂ is consumed. How many grams of each reactant will that take? Refer to a periodic table for data on atomic mass.

4.00 grams of each reactant are available. How many moles of N₂ can they consume?

However, only 0.09606 moles of the reaction is possible, since Li would have ran out before all 4.00 grams of N₂ are used up.

Each mole of the reaction makes 2 moles of Li₃N. 0.09606 moles of the reaction will produce 0.09606 × 2 × (3 × 6.94 + 14.01) = 6.69 grams of Li₃N.

The mentioned molecule with formula, CH₃NO where no bond is found between N and O can be depicted as formamide is shown in the attachment below.  

The formal charges = Number of valence electrons for the atom (V) - the number of electrons in lone pairs (N) - 1/2 (number of electrons in bond pairs, B)

FC = V - N - B/2

Thus, there is a need to calculate valence electrons, electrons in lone pairs, and the number of electrons in bond pairs for each atom in the mentioned molecule.  

V or valence electrons on C = 4e, on H = 1e, on N = 5e, and on O = 6e.  

N or electrons in lone pairs on C = 0e, on H = 0e, on N = 2e, and on O = 4e.  

B or number of electrons in bond pairs for C = 8e, for H = 2e, for N = 6e, and for O = 4e.  

Thus, the formal charges for each will be,  

C = 4 - 0 - (8/2) = 0

H = 1 - 0 - (2/2) = 0

N = 5 - 2 - (6/2) = 0

O = 6 - 4 - (4/2) = 0

Lewis dot structure for the given molecule is given in the attachment below:

Answer :  The Lewis-dot structure of [tex]CH_3NO[/tex] is shown below.

Explanation :

Lewis-dot structure : It shows the bonding between the atoms of a molecule and it also shows the unpaired electrons present in the molecule.

In the Lewis-dot structure the valance electrons are shown by 'dot'.

The given molecule is, [tex]CH_3NO[/tex]

As we know that carbon has '4' valence electrons, hydrogen has '1' valence electron, nitrogen has '5' valence electrons and oxygen has '6' valence electrons.

Therefore, the total number of valence electrons in [tex]CH_3NO[/tex] = 4 + 3(1) + 5 + 6 = 18

According to Lewis-dot structure, there are 12 number of bonding electrons and 6 number of non-bonding electrons.

Now we have to determine the formal charge for each atom.

Formula for formal charge :

[tex]\text{Formal charge}=\text{Valence electrons}-\text{Non-bonding electrons}-\frac{\text{Bonding electrons}}{2}[/tex]

[tex]\text{Formal charge on O}=6-4-\frac{4}{2}=0[/tex]

[tex]\text{Formal charge on C}=4-0-\frac{8}{2}=0[/tex]

[tex]\text{Formal charge on N}=5-2-\frac{6}{2}=0[/tex]

[tex]\text{Formal charge on }H_1=1-0-\frac{2}{2}=0[/tex]

[tex]\text{Formal charge on }H_2=1-0-\frac{2}{2}=0[/tex]

[tex]\text{Formal charge on }H_3=1-0-\frac{2}{2}=0[/tex]

Hence, the Lewis-dot structure of [tex]CH_3NO[/tex] is shown below.

this equation does support the law of conservation of mass.

Copper does not react with HCl acid, but copper oxide does react. A metal-acid reaction is always a redox reaction. Since copper has a higher reduction potential than hydrogen, it does not react with non-oxidising acids like HCl or dil.H2SO4.

Answer :

Double replacement reaction : It is a type of reaction in which a positive cation and a negative anion of the reactants react to give a new compound as  a product.

[tex]AB+CD\rightarrow AD+CB[/tex]

In this, A and C are the cations and B and D are the anions.

When one mole of potassium hydroxide react with the one mole of zinc chloride to give one mole of zinc hydroxide and 2 moles of potassium chloride.

The balanced chemical reaction is,

[tex]KOH+ZnCl_2\rightarrow Zn(OH)_2+2KCl[/tex]

Final answer:

Three ways carbon can enter the ocean are through running water, atmospheric dissolution, and decomposition of aquatic organisms.

Explanation:

Carbon can enter the ocean through three main ways:

Villi are tiny finger like projections present in the inner epithelial lining of the intestine. Each finger like villi is further divided into microvilli, which is the extension of plasma membrane of each epithelial cell of the villi. These villi and microvilli present on the inner surface of the intestine provide a greater surface area and this enhances the digestion and absorption of the nutrients.

Therefore, the correct answer is false as a microvilli is the tiny finger like projection of the inner epithelial cells of the small intestine that has absorptive functions.

The volume of one mole of substance is 22.4 L

To find the volume of 2.50 moles of carbon monoxide at STP, you multiply the moles by the molar volume at STP (22.4 L/mol), which gives you 56.0 liters.

To calculate the volume of carbon monoxide (CO) at standard temperature and pressure (STP), we should use Avogadro's Law. At STP, one mole of any gas occupies 22.4 liters. Given the amount of carbon monoxide in moles, we can determine the volume it would occupy at STP.

To find the volume:

Volume at STP (V) = Number of moles (n) x Molar volume at STP (Vm)

We know that:

[tex]n = 2.50\ moles\\ V_m = 22.4\ L/mol\ (volume\ occupied\ by\ one\ mole\ of\ gas\ at\ STP)[/tex]

So:

[tex]V = 2.50\ moles \times 22.4\ L/mol\\ V = 56.0\ liters[/tex]

This is the volume of 2.50 moles of carbon monoxide gas at standard temperature and pressure.

Answer

In a true decomposition reaction, the addition of energy in the form of heat or electricity is often required.

Explanation

A decomposition reaction is a chemical reaction that starts with single reactants to give new compounds as the products. These reaction requires a source of energy that could be light, heat  or electricity to facilitate the breaking-down of the chemical bonds.

Answer:

The addition of energy in the form of heat or electricity is often required.

This is a combustion reaction because it is being combined with oxygen. Then to balance you will put the number of carbons you have or 4 in front of the CO2 and then same with H2. Then you will add up the oxygen and divide it by two to get. 1, (13/2), 4, 5