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m_a_m_a [10]
3 years ago
8

A large stone weighs 53.0kg. How many pounds does it weigh?

Chemistry
1 answer:
Vladimir [108]3 years ago
3 0

Answer:

116.6 lbs

Explanation:

There are 2.2 lbs per Kilogram of weight - and likewise 0.454 Kilograms per pound - but instead of dividing by .454 I multiplied the weight by 2.2 to get 116.6 pounds (of course you could round up and get 117 but 116.6 is a little more accurate).

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Questions to be ask for testing a starch
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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.

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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
4 years ago
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