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3 years ago

How to convert metric units?

2 answers:

8 0

To convert among units in the metric system, identify the unit that you have, the unit that you want to convert to, and then count the number of units between them. If you are going from a larger unit to a smaller unit, you multiply by 10 successively.

guajiro [1.7K]3 years ago

7 0

To convert among units in the metric system, identify the unit that you have, the unit that you want to convert to, and then count the number of units between them. If you are going from a larger unit to a smaller unit, you multiply by 10 successively.

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Determine the mass in grams of 3.75 x 10^21 atoms of zinc. (the mass of one mole of zinc is 65.39 g)

Nastasia [14]

Answer: The mass in $3.75 \times 10^{21}$ atoms of zinc is 0.405 g.

Explanation:

Given: Atoms of zinc = $3.75 \times 10^{21}$

It is known that 1 mole of every substance contains $6.022 \times 10^{23}$ atoms. So, the number of moles in given number of atoms is as follows.

$Moles = \frac{3.75 \times 10^{21}}{6.022 \times 10^{23}}\\= 0.622 \times 10^{-2}\\= 0.0062 mol$

As moles is the mass of a substance divided by its molar mass. So, mass of zinc (molar mass = 65.39 g/mol) is calculated as follows.

$Moles = \frac{mass}{molar mass}\\0.0062 mol = \frac{mass}{65.39 g}\\mass = 0.405 g$

Thus, we can conclude that the mass in $3.75 \times 10^{21}$ atoms of zinc is 0.405 g.

6 0

3 years ago

Larger companies often need many workers who do different steps in the transportation process, instead of each member doing all

Ksju [112]

Answer:

WhAt iS iT/

Explanation:

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3 years ago

An igneous rock is found on the ground and has no identifiable crystals. What is the most likely origin of this rock?

Ivan

Answer:

Its a Extrusive Igneous Rock

Explanation:

They form on the surface where they cool.

6 0

3 years ago

Read 2 more answers

During an experiment, 321.1 grams of strontium phosphite are measured into a beaker. How many moles of strontium phosphite are i

Allushta [10]

321.1 g of strontium phosphite will contain 0.76 moles of strontium phosphite in the beaker.

Explanation:

It is known that 1 mole of any substance is equal to the molar mass of that substance. So for the case of strontium phosphite, the molar mass is found to be 420.8 g/mol.

This means 1 mole of Strontium phosphite will contain 420.8 g of strontium phosphite.

Then 1 g of strontium phosphite will have $\frac{1}{420.8}$ moles of strontium phosphite.

So, 321.1 g of strontium phosphite will contain $\frac{321.1}{420.8}=0.76 moles$

Thus, 321.1 g of strontium phosphite will contain 0.76 moles of strontium phosphite in the beaker.

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3 years ago

How to find efficiency of a pulley system

Digiron [165]

Multiply the weight of the object by the distance it traveled to find the amount of work output. For the example: 10 lbs. x 1 foot = 10 foot-pounds. Find the work efficiency by dividing the work output by the work input and multiplying by 100.

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4 years ago