CHEMISTRY HIGH SCHOOL

Provide a balanced equation for the reaction between lead nitrate and sodium chloride

Answers

Answer 1

Answer:

Answer:

Pb(NO3)2 + 2NaCl = PbCl2 + 2NaNO3

Explanation:

Lead nitrate is Pb(NO3)2

Sodium Chloride is NaCl

The basic reaction is:

Pb(NO3)2 + NaCl = PbCl2 + NaNO3

Now we need to balance the equation. Note that the lead nitrate contributes 2 (NO3) units, but there is only 1 NO3 on the product side. So start by adding a second NaNO3:

Pb(NO3)2 + NaCl = PbCl2 + 2NaNO3

Now we have 2 Na atoms on the right side, so add a "2" to the NaCl:

Pb(NO3)2 + 2NaCl = PbCl2 + 2NaNO3

This is starting to look good. Lets check the atom/unit counts on both sides of the equation:

Reactants Products

Pb 1 1

NO3 2 2

Na 2 2

Cl 2 2

The equation is now balanced. Pb(NO3)2 + 2NaCl = PbCl2 + 2NaNO3

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How many atoms of each element are in citric acid C₃H₄OH(COOH)₃?

Answers

Simplify

C3H4OH(COOH)3
C3H4OHC3H3O6
C6H8O7

6carbon

8Hydrogen

7Oxygen

When a substance changes from one phase to another, which of the following occurs?

Answers

The answer is that the substance loses or gains heat.

Answer:

The heat of the substance changes.

Explanation:

Substances can be made to change phases by fluctuating the temperature, the pressure, or both.

The vapor pressure of a liquid is 0.92 atm at 60°C. The normal boiling point of the liquid could be(1) 35°C (3) 55°C(2) 45°C (4) 65°C

Answers

The answer is (4) 65°C. For this question, you need to know that the definition of boiling is when a liquid's vapor pressure equals atmospheric pressure. Normal boiling point just means boiling point at sea level, when atmospheric pressure is 1atm. For this particular liquid, you would need to raise the temperature a little for the vapor pressure to rise to 1atm (because vapor pressure increases with temperature). Therefore your temperature must be higher than 60°C, and the only such choice available to you is (4).

Answer:

4 ¥

TRUST REASON

The answer is 4 because when the vapor pressure is in liquid form, the boiling point would be the hottest point

Primary alcohols can be dehydrated to produce A) ethers B) organic acids C) esters D) aldehydes

Answers

Primary alcohols can be dehydrated to produce ethers. The correct option is A, ethers.

What is dehydration?

Dehydration reaction are those reactions in which there is loss of water. When aldehyde reacts with sulfuric acid, it forms alkenes with loss of water, in excess of acids.

When aldehyde reacts with acids, with excess of aldehyde, forms ether.

Thus, the correct option is A) ethers.

Learn more about alcohol

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They form alkenes, not sure what group that falls under but B,C, and D definitely cant be the answer

Which substance will require more energy to heat if all the samples have the same mass and same temperature change?

Answers

If mass and the temperature change is not a factor then we can take a look at the chemical bonds in the substance. Chemical bonds can also dictate how hard a sample can be heated or to break the bonds in it.Two of the strongest bonds are the ionic and covalent bond. The strongest of the two is the ionic.

According to atomic theory: a. the nucleus is positively charged.
b. the nucleus contains both charged and uncharged particles.
c. the electrons contribute very little to the total mass of the atom.
d. the electrons are located in the atomic space outside the nucleus.
e. all of these