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stepan [7]
3 years ago
6

A sample of silver metal contains 1.91 X 1021 atoms. How many moles of silver is this?

Chemistry
1 answer:
alexandr402 [8]3 years ago
6 0

Answer:

1.91×1021/6.023×10^23

Explanation:

need thanks and make me brainiest if it helps you

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Can u please help me I don't understand it and if I don't do it my teacher will get really mad at me pleas
Nana76 [90]

Physical Change: It is a type of change in which matter changes its physical state like shape, size but is not transformed into another substance. It is usually a reversible process.

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6 0
3 years ago
Approximately how many natural forming elements are there
mamaluj [8]
98 elements are naturally forming elements.

Answer: 98
3 0
3 years ago
A sample of gas (1.9 mol) is in a flask at 21 °c and 697 mm hg. the flask is opened and more gas is added to the flask. the new
garik1379 [7]

To solve this problem, we assume ideal gas so that we can use the formula:

PV = nRT

since the volume of the flask is constant and R is universal gas constant, so we can say:

n1 T1 / P1 = n2 T2 / P2

 

1.9 mol * (21 + 273 K) / 697 mm Hg = n2 * (26 + 273 K) / 841 mm Hg

<span>n2 = 2.25 moles</span>

8 0
3 years ago
Where can you find a polar ice biome that contains pack ice and no soil?
ycow [4]

Answer:

APEX answer North Pole

Explanation:

6 0
3 years ago
Read 2 more answers
Which type of lipid is found in the body and is converted into vitamins, hormones, and bile salts?
Illusion [34]

Answer:

C.sterols

Explanation:

Sterols or steroid alcohols are type of lipids. In plants they are present as phytosterols and in animals as zoosterols. They maintain the fluidity of cell membrane, act as signalling molecules and also form the skin oils in animals.

Cholesterol is an important zoosterol. It is a fatty waxy substance. It is present in cell membrane. It is also a precursor for vitamin D. It is precursor for steroid hormones like cortisol and aldosterone. When it is non esterified, it gets converted to bile.  

3 0
3 years ago
Read 2 more answers
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