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mina [271]
3 years ago
10

Match the prefix with the power of ten it represents.

Chemistry
2 answers:
Sunny_sXe [5.5K]3 years ago
6 0

kilo 103 is the correct answer so it would mostly be 2

shtirl [24]3 years ago
3 0

Answer:

Mega- 10^6

Kilo-10^3

Hecto- 10^2

Deca-10^1

Deci-10^-1

Centi-10^-2

Milli-10^-3

Micro-10^-6

All are metric system units

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How much heat is absorbed/released when 20.00 g of NH3(g) reacts in the presence of excess O2 (g) to produce NO (g) and H2O (l)
FrozenT [24]

Answer:

a. 342.9 kJ of heat are absorbed.

Explanation:

Calculation of the moles of NH_3 as:-

Mass = 20.00 g

Molar mass of NH_3 = 17.031 g/mol

The formula for the calculation of moles is shown below:

moles = \frac{Mass\ taken}{Molar\ mass}

Thus,

Moles= \frac{20.00\ g}{17.031\ g/mol}

Moles= 1.1743\ mol

Given that:- \Delta H=+1168\ kJ

It means that 1 mole of NH_3 undergoes reaction and absorbs 1168\ kJ of heat

So,

1168 mole of NH_3 undergoes reaction and absorbs 1168\times 1168\ kJ of heat

<u>Amount of heat absorbed = + 342.9 KJ</u>

7 0
3 years ago
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