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Dmitry [639]
3 years ago
7

Which ones are right to this question?

Chemistry
1 answer:
Vitek1552 [10]3 years ago
7 0

The average Kenectic energy

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4Fe +302 + 2Fe2O3 <br> How many grams of Fe2O3 will be produced from 10.0 g of Fe and 7.00 g of O2?
Molodets [167]

Answer:10g of Fe produces 14.37g of Fe2O3

7g of O2 produce 46.84g of Fe2O3

Explanation:

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2 years ago
All atomic nuclei, except those of ordinary hydrogen, contain neutrons. <br> a. True<br> b. False
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PLEASE HELP ASAP!!!!!!!! What type of plate boundary is this and what does it cause?
aliya0001 [1]

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divergent

Explanation:

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8 0
3 years ago
__Ca(OH)2 + __ (NH4)2SO4 ----- &gt; ___CaSO4 + ___NH3 + __H2O<br><br> A)11<br> B)5<br> C)7<br> D)9
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When 3.0 kg of water is warmed from 10 °C to 80 °C, how much heat energy is needed?
Naddik [55]

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THE HEAT NEEDED TO CHANGE 3KG OF WATER FROM 10 C TO 80 C IS 877.8kJ OR 877,800 J.

Explanation:

Mass = 3.0 kg = 3 * 1000 = 3000 g

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Final temperature = 80 C

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Heat needed = unknown

Heat is the amount of energy in joules needed to change a gram of water by 1 C.

Heat = mass * specific heat * change in temperature

Heat = 3000 g * 4.18 J/g C * 70 C

Heat = 877 800 Joules

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The heat needed to change 3 kg mass of water from 10 C to 80 C is 877,800 J or 877.8 kJ.

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