2 years ago

How do the scientist know that cells exist

Chemistry

1 answer:

IrinaVladis [17]2 years ago

7 0

Because of us and other cells from plants and Animals

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Zinc put in concertrated sodium hydroxide

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2 years ago

Identify the number of moles in 369 grams of calcium hydroxide. Use the periodic table and the polyatomic ion resource.

topjm [15]

Answer : The number of moles in 369 grams of calcium hydroxide is, 4.98 moles

Explanation : Given,

Mass of calcium hydroxide = 369 g

Molar mass of calcium hydroxide = 74.093 g/mole

Formula used :

$\text{Moles of calcium hydroxide}=\frac{\text{Mass of calcium hydroxide}}{\text{Molar mass of calcium hydroxide}}$

Now put all the given values in this formula, we get the moles of calcium hydroxide.

$\text{Moles of calcium hydroxide}=\frac{369g}{74.093g/mole}=4.98mole$

Therefore, the number of moles in 369 grams of calcium hydroxide is, 4.98 moles

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2 years ago

An object has a mass of 441 g and a volume of 10cm3

expeople1 [14]

Answer:

44.1g/cm3

Explanation:

d=m/v

=441/10

=44.1 g/cm3

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2 years ago

How many moles are in 100 grams of gold?

raketka [301]

Answer:

0.01 mole

Explanation:

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2 years ago

Define energy and power and describe the relationship that exists between them.

bagirrra123 [75]

Energy is ability to work or function. Power is the amount of energy transferred to an object.
When energy is transferred to an object or has energy it moves and power is the energy put in a object, meaning they work together to move the object

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2 years ago