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2 years ago

Do the multiplication and show the answer with the correct significant figures.

Chemistry

2 answers:

CaHeK987 [17]2 years ago

6 0

Answer:

Explanation:

In multiplication: the least number of significant figures in any number of the problem determines the number of significant figures in the answer.

3.6 has two significant figures, therefore, the number of significant figures is 2

Scientific notation: 1.5 x 10

#1: Multiply

3.6 x 4.27 = 15.372

#2: Round to 2 significant figures

Airida [17]2 years ago

3 0

Answer is 15.

3.6*4.27 = 15.372

There are two significant digits because the lowest amount given in the question is 3.6 which has two significant digits. We follow that with our answer, giving us 15.

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2 years ago

Read 2 more answers

Predict the products of La(s) + O2(aq) ->

mina [271]

Answer:

i. La (s) + O2 (g) => LaO2 (s)

ii. La (s) + O2 (g) => La2O (s)

III. La (s) + O2 (g) => La2O3 (s)

Explanation:

Hello there!

When you are given such a problem for completing the chemical equations, what you have to understand is that metals are found in groups I, II and III. While Oxygen is a group VI element.

From the above question I have considered that my La(s), solid is either Sodium (Na) - group I, Magnesium - group II and Aluminum - group III.

In a reaction, there is exchange of electrons given by their oxidation numbers (I, II and III - for our metals above)

The chemical equations are thus;

i. Na (s) + O2 (g) => NaO (s)

ii. Mg (s) + O2 (g) => Mg2O (s)

iii. Al (s) + O2 (g) => Al2O3 (s)

Relate this to the problem and it will be;

i. La (s) + O2 (g) => LaO2 (s)

ii. La (s) + O2 (g) => La2O (s)

III. La (s) + O2 (g) => La2O3 (s)

I hope this helps you to understand better. Enjoy your studies

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