3 years ago

An example of a substance that can be decomposed by a chemical change is:

Chemistry

2 answers:

Savatey [412]3 years ago

7 0

The answer is iron..

solniwko [45]3 years ago

7 0

C)iron
The best answer is iron because it rusts when exposed to oxygen

You might be interested in

PLEASE HELP ASAP

swat32

Answer:

Fe is the limiting reagent

Explanation:

4 0

3 years ago

The mass ratio of H to O in water (H2O) is 1:8. What is the mass

svp [43]

Answer: 1:16

Explanation:

4 0

3 years ago

A copper rod takes up 75 mL of space. With a density of 8.96 g/mL, what is the mass of the rod

pantera1 [17]

5.73 is the mass of the rod

5 0

2 years ago

Determine the length of the object shown. 7 cm 7.2 cm 72.5 mm 72.50 mm

jekas [21]

Answer:

either 7.2 or 7.25

Explanation: its not 7 because it starts before 1 not on 1 (i cant remember the answer but sorry if its wrong

5 0

3 years ago

Read 2 more answers

A compound with the empirical formula C2HF4 was found to have a molar mass of about 200g/mole. What is the molecular formula of

alukav5142 [94]

Answer:

$C_4H_2F_8$ is the molecular formula of the compound.

Explanation:

For determining the molecular formula, we need to determine the valency which is multiplied by each element to get the molecular formula.

The equation used to calculate the valency is :

$n=\frac{\text{molecular mass}}{\text{empirical mass}}$

We are given:

Mass of molecular formula = 200 g/mol

Mass of empirical formula of $C_2HF_4$ :

2 × 12 g/mol + 1 × 1 g/mol + 4 × 19 g/mol = 101 g/mol

Putting values in above equation, we get:

$n=\frac{200 g/mol}{101 g/mol} =1.9 \approx 2$

Multiplying this valency by the subscript of every element of empirical formula, we get:

$C_{(2\times 2)}H_{(1\times 2)}F_{(4\times 2)}=C_4H_2F_8$

$C_4H_2F_8$ is the molecular formula of the compound.

5 0

3 years ago