4 years ago

Can you explain the difference between molarity, percent by mass, and molality?

Chemistry

1 answer:

cestrela7 [59]4 years ago

3 0

Http://chemistry.about.com/od/chemistryterminology/a/What-Is-The-Difference-Between-Molarity-And-Mol...

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What is the molar mass in g/mol for In2S3? (Show Work)

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Answer:i have no idea

Explanation:

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Question 2/8<br> From left to right across the second period of the periodic table,

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3 years ago

A 25 Ω resistor has a voltage drop of 12 V across it. Calculate the current flowing through the resistor

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Answer:

0.48

Explanation:

$i = \frac{v}{r}$

because we are looking for I which is current we say

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3 years ago

How many grams of ammonia (NH3) are present in 5.0L of a 0.050M Solution?

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3 years ago

Read 2 more answers

Calculate the molar concentrations of H+ and OH− in solutions that have the following pH values:

Anastaziya [24]

Answer:

Explanation:

a )

pH = - log[ H⁺]

8.26 = - log[ H⁺]

[ H⁺] = 10⁻⁸°²⁶ mole / l

= 5.49 x 10⁻⁹ moles / l

[ H⁺] [OH⁻] = 10⁻¹⁴

[OH⁻] = 10⁻¹⁴ / 5.49 x 10⁻⁹

= .182 x 10⁻⁵ moles / l

b )

10.25 = - log[ H⁺]

[ H⁺] = 10⁻¹⁰°²⁵ mole / l

= 5.62 x 10⁻¹¹ moles / l

[ H⁺] [OH⁻] = 10⁻¹⁴

[OH⁻] = 10⁻¹⁴ / 5.62 x 10⁻¹¹

= .178 x 10⁻³ moles / l

c )

4.65 = - log[ H⁺]

[ H⁺] = 10⁻⁴°⁶⁵ mole / l

= 2.24 x 10⁻⁵ moles / l

[ H⁺] [OH⁻] = 10⁻¹⁴

[OH⁻] = 10⁻¹⁴ / 2.24 x 10⁻⁵

= .4464 x 10⁻⁹ moles / l

7 0

3 years ago