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3 years ago

What does the color and smooth texture of this

Chemistry

2 answers:

Sergeu [11.5K]3 years ago

7 0

Answer:A

Explanation:

It cools rapidly I am contains dark minerals

Pavlova-9 [17]3 years ago

6 0

Answer:

It cools rapidly and contains dark minerals.

Explanation:

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What term is best described as the rate of a chemical reaction at any instant in time?

Fantom [35]

Answer:

instantaneous rate would be the term.

5 0

2 years ago

The equation for one of the reactions in the process of turning iron ore into the metal is

Leona [35]

Answer:

2100g or 2.1kg

Explanation:

Based on the equation given,

One mole of Fe2O3 gives two moles of Fe

Molar mass for Fe2O3 is 160g/mol

Molar mass for two Fe is 112g/mol

Convert 3kg to gram

3×1000=3000grams

160g of Fe2O3-112 g of Fe

3000g of Fe2O3-xg of Fe

Xg=3000×112/160

Xg=2100g

To convert to kg

2100/1000=2.1kg

Mass of Fe is 2.1kg

7 0

3 years ago

How many atoms are there in 24 moles of Fe?

Semenov [28]

Answer: There are $145 \times 10^{23}$ atoms in 24 moles of Fe.

Explanation:

According to the mole concept, 1 mole of a substance contains $6.022 \times 10^{23}$ atoms.

Therefore, atoms present in 24 moles of Fe are calculated as follows.

$24 mol \times 6.022 \times 10^{23} atoms/mol\\= 144.52 \times 10^{23} atoms\\or, 145 \times 10^{23} atoms$

Thus, we can conclude that there are $145 \times 10^{23}$ atoms in 24 moles of Fe.

8 0

3 years ago

The monomer of poly(vinyl chloride) has the formula C2H3Cl. If there are 1,565 repeat units in a single chain of the polymer, wh

monitta

Answer:

$\large \boxed{9.780 \times 10^{4}\text{ u}}$

Explanation:

The molecular mass of a monomer unit is:

C₂H₃Cl = 2×12.01 + 3×1.008 + 35.45 = 24.02 + 3.024 + 35.45 = 62.494 u

For 1565 units,

$\text{Molecular mass} = \text{1565 units} \times \dfrac{\text{62.494 u}}{\text{1 unit }} = \mathbf{9.780 \times 10^{4}}\textbf{ u}\\\\\text{The molecular mass of the chain is $\large \boxed{\mathbf{9.780 \times 10^{4}}\textbf{ u}}$}$

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3 years ago

(3.5 × 1016)(2.2 × 1010) = A × 10B

saveliy_v [14]

1016)(2.2 × 1010) = A × 10B A= B= Chemistry.

6 0

3 years ago

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