3 years ago

One mole of Beryllium weighs 9.0122 grams. How many atoms of Beryllium are

Chemistry

1 answer:

Butoxors [25]3 years ago

7 0

Answer:

Explanation:

cause 1 mole of beryllium weighs 4gram

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What is the density of an object that has a mass of 149. 8 g and displaces 12. 1 ml of water when placed in a graduated cylinder

kozerog [31]

Answer:

Explanation:

The density of a substance can be found by using the formula

$d = \frac{m}{v} \\$

m is the mass

v is the volume

From the question

m = 149.8 g

v = 12.1 mL

We have

$d = \frac{149.8}{12.1} = 12.380165... \\$

We have the final answer as

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2 years ago

What is salad dressing classified as

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if an iron nail is placed in a glass of water the nail will sink. Is the density of iron smaller than or larger than the density

Gala2k [10]

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3 years ago

If I have 9 moles of a gas at a pressure of 8.7 atm and a volume of 18 liters, what is the temperature?

alukav5142 [94]

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4 years ago

C-12 and C-13 are naturally-occurring isotopes of the element carbon. C-12 occurs 98.88% of the time and C-13 occurs 1.108% of t

Veseljchak [2.6K]

Answer:

c) (12×0.9889) + (13×0.01108)

Explanation:

Given data:

Percentage of C-12 = 98.89%

Percentage of C-13 = 1.108%

Atomic mass = ?

Solution:

98.89/100 = 0.9889

1.108/ 100 = 0.01108

Atomic mass = (12×0.9889) + (13×0.01108)

Atomic mass = (11.8668 + 0.144034)

Atomic mass = 12.01084

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4 years ago