3 years ago

What is a chemical change??

Chemistry

1 answer:

alina1380 [7]3 years ago

4 0

<span>Chemical change is any change that results in the formation of new chemical substances. </span>

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Given the unbalanced reaction: P₄+ O₂ <img src="https://tex.z-dn.net/?f=%5Crightarrow" id="TexFormula1" title="\rightarrow" alt=

alex41 [277]

Answer:

The correct answer is option e.

Explanation:

$P_4+ 5O_2 \rightarrow P_4O_{10}$

Moles of phosphorus pent-oxide :

$\frac{14.2 g}{284 g/mol}=0.05 mol$

According to reaction, 1 mole of phosphorus pent-oxide is obtained from 5 moles of oxygen gas.

Then 0.05 mole of phosphorus pent-oxide will be obtained from:

$\frac{5}{1}\times 0.05 mol=0.25 mol$

Hence,the correct answer is option e.

6 0

3 years ago

Determine the number of moles of hydrogen atoms in each sample.

schepotkina [342]

The answer is going to be d

8 0

2 years ago

Which half-reaction is most easily oxidized?

netineya [11]

From the ones that you are showing me <span>the more positive the potential the more likely: </span>

<span>Fe+3 + e- ---> Fe+2
I hope this is something very useful</span>

7 0

3 years ago

Read 2 more answers

Which of the following describes what occurs as a gas becomes a liquid?

lora16 [44]

As the gas cools it condenses and becomes a liquid its atoms also become smaller

5 0

2 years ago

An object has a mass of 5.52 g and a volume of 12 mL. What is the density of the object?

Rudik [331]

Answer:

<h2>Density = 0.46 g/mL</h2>

Explanation:

Density of a substance can be found by using the formula

<h3> $Density = \frac{mass}{volume}$ </h3>

From the question

mass = 5.52 g

volume = 12 mL

Substitute the values into the above formula and solve for the Density

That's

<h3> $Density = \frac{5.52}{12}$ </h3>

We have the final answer as

<h3>Density = 0.46 g/mL</h3>

Hope this helps you

4 0

2 years ago