3 years ago

What happens when two forces act in the same direction?

1 answer:

4 0

If 2 forces act on a object in the same direction, the net force is equal to the sum of 2 forces. This always results in a stronger force than either individual forces alone

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How many moles are in 55.0 g calcium nitrate?

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Answer: 0.335 mols Ca(NO3)2

Explanation: To go from grams to mols you divide grams by the molar mass of the substance so, 55/164.088 = 0.335

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2 years ago

What is mole ? and it's unit

Aloiza [94]

$\\ \sf\longmapsto 1mole\:is\:a\:specific\:amount\:of\:particles\:of\:a\:substance .$

$\\ \sf\longmapsto It\:is\:Represented\:as\:mol$

$\\ \sf\longmapsto 1mol=6.023\times 10^{23}particles$

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Identify and calculate the number of representative particles in 2.15 moles of gold.<br>

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Answer:

$1.29 * 10^{24}$ particles of gold

Explanation:

To convert the number of moles of any substance, in this case gold, you need Avogadro's number.

Avogadro's number is always $6.022$ × $10^{23}$

$2.15$ moles Au × $\frac{6.022*10^{23} particles}{1 mole Au}$ = $1.29 * 10^{24}$ particles of gold

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2 years ago

Why do doctors worry more about a fever of a couple of degrees Celsius than a fever of a couple of degrees Fahrenheit

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Because Celcius is a larger amount than Fahrenheit. The units are farther apart.

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3 years ago

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