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Kay [80]
3 years ago
8

What challenges did scientists across the world face that inspired them to create the SI? ​

Chemistry
1 answer:
Svetlanka [38]3 years ago
6 0

Answer:

SI has seven basic units, from which others are derived: the second, ... of the metric system had grown out of the problems scientists encountered.

Explanation:

I learned this in school

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A student prepares a solution by dissolving 60.00 g of glucose (molar mass 180.2 g mol-1) in enough distilled water to make 250.
anyanavicka [17]

Answer:

1.332 Molar is the molarity of the glucose solution.

Explanation:

Molarity of the solution is the moles of compound in 1 Liter solutions.

Molarity=\frac{\text{Mass of compound}}{\text{Molar mas of compound}\times Volume (L)}

Mass of glucose = 60.00 g

Molar mass of glucose = 180.2 g/mol

Volume of the solution = V = 250.0 mL = 0.250 L

(1 mL  = 0.001 L)

Molarity=\frac{60.00 g}{180.2 g/mol\times 0.250 L}=1.332 mol/L

1.332 Molar is the molarity of the glucose solution.

4 0
3 years ago
Determine the number of valence electrons for magnesium
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Answer:

Magnesium has 2 valence electrons.

Explanation:

The atomic number of magnesium is 12. This means that it has 12 protons and 12 electrons. The first electron shell can hold 2 electrons, the second can hold 8, so the third will have 2 electrons. The outermost shell of the atom has two electrons. Therefore, magnesium has 2 valence electrons.

3 0
4 years ago
Calculate [H+] if [OH-] = 3.7 X 10-5 M
barxatty [35]

Answer:

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Explanation:

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4 0
4 years ago
Which is true of the enthalpy of a reaction?
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Answer: I think it's B

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Answer:

b. . the element symbol

6 0
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