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schepotkina [342]
3 years ago
12

What is the density of a piece of wood that has a mass of 25.0 g and a volume of 29.4 mL?

Chemistry
1 answer:
olga55 [171]3 years ago
6 0

Answer:

0.850 g / cm3

Explanation:

The problem can be solved using the formula:

Density = mass / volume

Since two of the data are already provided in the problem, just plug in the values to the formula.

(Rearrangement of the formula from its standard form is not necessary at all)

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Can yall answer the question on the image PLEASE
Brut [27]
Answer is 67.8%

To find the percent yield the equation is actual yield over theoretical yield, and multiply by 100. In this problem it is 4.06996 / 6 = 0.678 x 100 = 67.8%
6 0
3 years ago
Match the vocabulary word with its definition. Match the items in the left column to the items in the right column. 1. The actua
tekilochka [14]

Answer:

1. The actual amount of product that is produced from a given amount of reactant or reactants.  → actual yield  

2. A law which states that in ordinary chemical reactions, the sum of the masses of the reactants always equals the sum of the masses of the products.    → Conservation of Mass

3. The reactant that is not used up in a reaction that goes to completion

→ excess reactant  

4. The reactant that limits how much product is produced in a reaction that goes to completion. It is used up in the reaction. → limiting reactant  

5. The ratio of the actual yield to theoretical yield multiplied times 100.

→ percent yield

6. The maximum calculated amount of product produced from a given reactant in a reaction that goes to completion. → theoretical yield

7. The study of the quantitative relationships between reactants and products in a chemical reaction. → stoichiometry  

Explanation:

1. The actual amount of product that is produced from a given amount of reactant or reactants.  → actual yield  

  • The actual yield is the actual amount of product that is produced in a chemical reaction and it can be determined experimentally.

2. A law which states that in ordinary chemical reactions, the sum of the masses of the reactants always equals the sum of the masses of the products.    → Conservation of Mass

  • The law of conservation of mass states that mass in an isolated closed system is neither created nor destroyed by chemical reactions or physical transformations. According to the law of conservation of mass, the mass of the products in a chemical reaction must equal the mass of the reactants.

3. The reactant that is not used up in a reaction that goes to completion

→ excess reactant  

  • In any chemical reaction between two or more reactants, the excess reactant is the substance that is leftover when the chemical reaction is ended. The amount of product formed is not limited by this reagent.

4. The reactant that limits how much product is produced in a reaction that goes to completion. It is used up in the reaction. → limiting reactant  

  • In any chemical reaction between two or more reactants, the limiting reactant is the substance that is consumed completely when the chemical reaction is ended. The amount of product formed is limited by this reagent, since the reaction cannot continue without it.

5. The ratio of the actual yield to theoretical yield multiplied times 100.

→ percent yield

  • percent yield  = (actual yield / theoretical yield) *100

6. The maximum calculated amount of product produced from a given

reactant in a reaction that goes to completion.

→ theoretical yield

  • theoretical yield  is defined as the amount of the obtained desired product.

7. The study of the quantitative relationships between reactants and products in a chemical reaction.

→ Stoichiometry

  • Stoichiometry is a branch of chemistry that deals with relationships between reactants and/or products in a reaction to determine desired quantitative data.

3 0
3 years ago
The coiling of the protein chain backbone into an alpha helix (like a spring) is referred to as the ________.
Agata [3.3K]

Answer: secondary structure

Explanation:

5 0
4 years ago
What is the molar mass of KCI
9966 [12]

Answer:

178.01347 ± 0.00093 g/mol

Explanation:

7 0
3 years ago
Why is it necessary for a molecule to absorb energy in order to break a chemical compound
nasty-shy [4]

When a chemical reaction occurs, molecular bonds are broken and other bonds are formed to make different molecules.

For example, the bonds of two water molecules are broken to form hydrogen and oxygen. Energy is always required to break a bond. Hope this helps you!

6 0
4 years ago
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