3 years ago

HELP!!! OPTIONS: gas, liquid, solid

Chemistry

1 answer:

erica [24]3 years ago

3 0

Answer:

Melting: solid liquid, Freezing: liquid to solid, Evaporation: liquid to gas.

Explanation:

mark me the brainliest

You might be interested in

Which statement is true for a pure compound<br> but NOT true for a pure element?

amid [387]

A pure compound contains many elements.

5 0

3 years ago

This is an example of <br> A. Reflection<br> B. Diffraction<br> C. Refraction

lord [1]

Answer:

I believe it is B (if you get it wrong it's my fault)

5 0

3 years ago

What are the advantages and disadvantages of DNA foresics/analysis?

Simora [160]

Advantage: Identifications

Disadvantage: Disease Screening

7 0

3 years ago

Read 2 more answers

Scientists discovered that earths core has two parts by studying?

Tatiana [17]

Answer:

its not actually proven its just a hypothesis because they can't dig that deep because of the pressure

8 0

3 years ago

The reduction of iron(III) oxide to iron metal is an endothermic process: Fe2O3(s) + 2 CO(g) → 2 Fe(s) + 3 CO2(g) ΔH = +26.3 kJ

valentinak56 [21]

Answer: Thus 234 kJ of energy are required to produce 1.00 kilogram of iron metal

Explanation:

To calculate the number of moles , we use the equation:

$\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}$

Putting values , we get:

$\text{Moles of iron}=\frac{1000g}{56g/mol}=17.8moles$ (1.00kg=1000g)

The balanced chemical reaction is:

$Fe_2O_3(s)+2CO(g)\rightarrow 2Fe(s)+3CO_2(g)$ $\Delta H=+26.3kJ$

Given :

Energy released when 2 moles of $Fe$ is produced = 26.3 kJ

Thus Energy released when 17.8 moles of $Fe$ is produced =

= $\frac{26.3kJ}{2}\times 17.8=234kJ$

Thus 234 kJ of energy are required to produce 1.00 kilogram of iron metal

7 0

3 years ago