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baherus [9]
2 years ago
12

How much energy is required to change 75 grams of copper at 35 degrees Celsius

Chemistry
1 answer:
julsineya [31]2 years ago
7 0
88383838882828282829928282992928283838388383839292
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If the mass of a material is 76 grams and the volume of the material is 16 cm3, what would the density of the material be? g/cm3
mafiozo [28]
4.8 g/cm3 with sig figs since it's mass/volume you divide 76 grams by 16 cm3
6 0
3 years ago
PLEASE HELP!
Tanzania [10]
Molar mass:

KCl = 74.55 g/mol

KClO3 = 122. 55 g/mol

  <span>Calculation of the mass of KClO3 :</span>

<span>2 KClO3 =  2 KCl + 3 O2</span>

2* 122.55 g KClO3 ------------------ 2 * 74.55 g KCl
mass KClO3 ?? --------------------- 25.6 g KCl

mass KClO3 = 25.6 * 2 * 122.55 / 2 * 74.55

mass KClO3 = 6274.56 / 149.1

mass = 42.082 g of  KClO3

Therefore:

1 mole KClO3 ---------------------- 122.55 g
?? moles KClO3 ------------------- 42.082 g

moles KClO3 = 42.082 * 1 / 122.55

moles KClO3 = 42.082 / 122.55

=> 0.343 moles of KClO3


Answer C

hope this helps!

3 0
3 years ago
Calculate the molarity of a solution containing 15.2 grams of NaCl dissolved in 2.5 L of solution.
Advocard [28]

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en español por favor

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8 0
3 years ago
Age
cupoosta [38]

Answer:

Option (2)

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Since the amount of each sample is the same, we are looking for the metal with the greatest density, which is copper.

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1 year ago
Which of the following would result in decreased entropy?
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B ice melting hope it helps

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