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Leno4ka [110]
3 years ago
12

Question 1

Chemistry
1 answer:
olchik [2.2K]3 years ago
4 0

Answer:

Explanation:

nm

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What is the result of multiplying
vlabodo [156]

Answer:

i believe it's C

Explanation:

the result of multiplying (2.5 * 1010) and (3.5 x 10-7) is 8.8.10^3

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2 years ago
How many moles of magnesium are in 58.64g?
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Molar mass of aspirin =180. So, moles of aspirin = 500 × 1 0 − 3 / 180 = 2.78 × 1 0 − 3 = 278 × 1 0 −

3 0
4 years ago
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Calculate number of grams in 1.15*10^21 molecules of P2O5
Vlada [557]
To go from molecules, we first need to convert to moles and then convert to grams.

To convert from molecules to moles, we need to divide by Avogadro's constant.

1.15*10^21 molecules * (1 mole/6.022*10^23 molecules) = 0.0019097 moles

To convert from moles to grams, we need to use the molar mass.

The molar mass of P₂O₅ is (2*30.98)+(5*16.00) = 141.96
You can find the molar mass using the periodic table.

0.0019097 moles * (141.96 grams/1 mole) = 0.2711 grams.

Since we have 3 significant digits in 1.15*10^21, that means our final answer is limited to 3 significant digits.

Your final answer is 0.271 grams.
6 0
4 years ago
Which describes density?
Yuri [45]

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Density, mass of a unit volume of a material substance. The formula for density is d = M/V, where d is density, M is mass, and V is volume. Density is commonly expressed in units of grams per cubic centimetre. ... For example, the density of air is 1.2 kilograms per cubic metre.

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3 years ago
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When seawater evaporates the concentration of salts increases until
Valentin [98]
Water go through areas of high to low concentration in this case osmosis.
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