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mrs_skeptik [129]
2 years ago
13

What is the best definition

Chemistry
2 answers:
Ann [662]2 years ago
7 0

Answer:

B.

Explanation:

thermal expansion♡

Sav [38]2 years ago
5 0

answer:

I think is B. Thermal expansion is when an object's volume

decreases due to heat increase.

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what would the heat transfer be if you are making macaroni and it rises and falls in a pot on the stove ?
MrMuchimi
Convection

Convection is transfer of heat through fluid (liquid or gas) caused by their molecular motion. In convection, heat current flows in a vertically upward direction. Macaroni rising and falling in a pot of boiling water is due to convection
7 0
2 years ago
Calculating the Molecular Weight and Subunit Organization of a Protein From Its Metal Content The element molybdenum (atomic wei
Deffense [45]

Answer:

Dimer of two peptide chains with 1 mole of molybdenum metal each.

Explanation:

Percentage of molybdenum in protein = 0.08%

Molecular mass of nitrate reductase = 240,000 g

Mass of molybdenum = x

0.08\%=\frac{x}{240,000 g}\times 100=192 g

Moles of molybdenum =\frac{192 g}{95.95 g/mol}=2.00 mol

Each peptide chain of nitrate reductase contain 1 mole of molybdenum.

This means that nitrate reductase is composed of to two peptide chains. And in each peptide there is a single mole of molybdenum metal.

4 0
3 years ago
When an atom loses electrons it undergoes ____.
Karo-lina-s [1.5K]
When a atom loses electrons it becomes a ion
3 0
3 years ago
Read 2 more answers
A student is asked to standardize a solution of potassium hydroxide. He weighs out 1.08 g potassium hydrogen phthalate (KHC8H4O4
natka813 [3]

Answer:

A. 0.143 M

B. 0.0523 M

Explanation:

A.

Let's consider the neutralization reaction between potassium hydroxide and potassium hydrogen phthalate (KHP).

KOH + KHC₈H₄O₄ → H₂O + K₂C₈H₄O₄

The molar mass of KHP is 204.22 g/mol. The moles corresponding to 1.08 g are:

1.08 g × (1 mol/204.22 g) = 5.28 × 10⁻³ mol

The molar ratio of KOH to KHC₈H₄O₄ is 1:1. The reacting moles of KOH are 5.28 × 10⁻³ moles.

5.28 × 10⁻³ moles of KOH occupy a volume of 36.8 mL. The molarity of the KOH solution is:

M = 5.28 × 10⁻³ mol / 0.0368 L = 0.143 M

B.

Let's consider the neutralization of potassium hydroxide and perchloric acid.

KOH + HClO₄ → KClO₄ + H₂O

When the molar ratio of acid (A) to base (B) is 1:1, we can use the following expression.

M_{A} \times V_{A} = M_{B} \times V_{B}\\M_{A} = \frac{M_{B} \times V_{B}}{V_{A}} \\M_{A} = \frac{0.143 M \times 10.1mL}{27.6mL}\\M_{A} =0.0523 M

8 0
3 years ago
What is the formula of lead nitrate​
monitta

Answer: Pb(NO3)2

Explanation:

5 0
3 years ago
Read 2 more answers
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