3 years ago

Question 12 (1 point)

Chemistry

2 answers:

Vinvika [58]3 years ago

8 0

Answer:

Option c. Neutral

Explanation:

Only neutral solution gives a green colouration to a pH paper

marishachu [46]3 years ago

5 0

Neutral
There was no change on the red or blue litmus and the ph paper turned green because it had a pH of 7

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Veronika [31]

Answer:co2

Explanation:

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3 years ago

a propane torch is lit inside a hot air balloon during preflight preparations to inflate the balloon. which condition of the gas

earnstyle [38]

Answer:

The pressure remains constant

Explanation:

this is an example in charles law where as the temperature increases so does the volume.

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The following reaction is a _______ reaction.

jasenka [17]

Compound reaction :)

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Proper significant figure: 27.01 + 14.369

Paul [167]

Answer:

<h2>put the bigger number on top then add </h2>

Explanation:

41.369

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3 years ago

What is the empirical formula of the compound that is 25.3% magnesium and 74.7% chlorine

Margarita [4]

Answer: $MgCl_2$

Explanation:

25.3% Mg

74.7% Cl

First step: change % to g

25.3g Mg

74.7g Cl

Second step: calculate g/mol of each compound. You can do this by using the atomic mass.

$25.3gMg(\frac{1mol}{24.30g})=1.04mol$

$74.7gCl(\frac{1mol}{35.45g} )=2.11mol$

Third step: determine the lowest number and divide everything by it. Of the result, extract whole number only.

$Mg=\frac{1.04}{1.04} =1$

$Cl=\frac{2.11}{1.04}=2$

Fourth step: Write each compound with their respective number below.

This empirical formula should be: $MgCl_2$

4 0

3 years ago