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alukav5142 [94]
3 years ago
14

The starting substances in a chemical reaction are called the _____?

Chemistry
1 answer:
ozzi3 years ago
5 0
The starting substances in a chemical reaction are called the C. Reactants.
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Kruka [31]
Ionic crystals are hard because of tight packing lattices, say, the positive and negative ions are strongly attached among themselves.
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Which clue can be used to identify a chemical reaction as a decomposition reaction?
inn [45]

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plzz mark brainliast:

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Matthew has been collecting quarters in a jar. He has 176 quarters. What is the value of the coins in his jar?
AURORKA [14]

Answer:

The correct answer is : 44 dollars.

Explanation:

A quarter is one fourth of a dollar that is the reason it is known as quarter. A quarter is 25 cents or 0.25 dollar in value. If Matthew has 176 quarters in his jar than the value of the total coins would be:

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3 0
3 years ago
If the pressure inside your ballon is 800mmHG ,and the gas is at body temperature,37 degree Celsius , calculate the number of gr
SpyIntel [72]
With all of the information given (pressure, volume, temperature, and the molar mass), we need a formula that relates this all together. The formula we need is the ideal gas law, PV=nRT. Since the pressure is defined in millimeters of mercury, we need the R value that correlates with this, which is 62.4; on top of this, we need the temperature in Kelvin - simply add 273.15 to convert from Celsius. With all of this information, simply plug-and-chug:

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Finally, the problem is asking the amount of air in grams. We have moles, so all we need to do is multiply that value by the molar mass.

0.1529 moles x 29 grams per mole =
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The balloon has 4.435 grams of air inside it.

Hope this helps!
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