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kumpel [21]
3 years ago
13

Which explains why carbon is a component of so many elements?

Chemistry
1 answer:
murzikaleks [220]3 years ago
5 0
Carbon is a component of so many elements because <span>It can form stable compounds with other elements and also bond with them.</span>
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A 1.0 g sample of hydrogen reacts completely with 19.0 g of fluorine to form a compound of hydrogen and fluorine. a. What is the
Rashid [163]

Explanation:tr

a) Molar mass of HF = 20 g/mol

Atomic mass of hydrogen = 1 g/mol

Atomic mass of fluorine = 19 g/mol

Percentage of an element in a compound:

\frac{\text{Number of atoms of element}\times \text{Atomic mass of element}}{\text{Molar mass of compound }}\times 100

Percentage of fluorine:

\frac{1\times 19 g/mol}{20g/mol}\times 100=95\%

Percentage of hydrogen:

\frac{1\times 1g/mol}{20 g/mol}\times 100=5\%

b) Mass of hydrogen in 50 grams of HF sample.

Moles of HF = \frac{50 g}{20 g/mol}=2.5 mol

1 mole of HF has 1 mole of hydrogen atom.

Then 2.5 moles of HF will have:

1\times 2.5 mol=2.5 mol of hydrogen atom.

Mass of 2.5 moles of hydrogen atom:

1 g/mol × 2.5 mol = 2.5 g

2.5 grams of hydrogen would be present in a 50 g sample of this compound.

c) As we solved in part (a) that HF molecules has 5% of hydrogen by mass.

Then mass of hydrogen in 50 grams of HF compound we will have :

5% of 50 grams of HF = \frac{5}{100}\times 50 g=2.5 g

8 0
3 years ago
4. Which elements would have similar properties to potassium?
iren [92.7K]

Answer:

The answer is A. Lithium and Sodium

5 0
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Which consists of only one type of atom
Debora [2.8K]

Answer:

an element

Explanation:

elements like iron or copper consist of only one type

4 0
3 years ago
Which of the answer choices correctly describes a phase change that occurs when a solid transitions directly into a gas state wi
mihalych1998 [28]
The change directly from solid to gas is called sublimation
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How many moles of gas would be present in a gas trapped within a 100.0 mL vessel at 25.0°C at a pressure of 2.50 atmospheres?
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Answer:

bjbchgchhvvjnkvgx

Explanation:

njvg id xgg

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