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slava [35]
3 years ago
11

Iron - 55 and Iron - 57 are

Chemistry
1 answer:
alex41 [277]3 years ago
4 0

Answer:

55+57=117 this is the answer

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The purpose of an incline plane is to reduce which of the following?
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If you have 11.2 g of NaCl, how many moles do you have?
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What volume, in mL, of concentrated 16 M nitric acid would you need to use in order to prepare 500.0 mL of a 0.250 M HNO3(aq) so
shtirl [24]

Given :

Initial concentration of nitric acid, C_1 = 16\ M.

Final concentration of nitric acid, C_2 =  0.250 \ M.

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Volume needed( V_1 ).

Solution :

We know,

C_1V_1 =C_2V_2\\\\16 \times V_1 = 0.250 \times  0.5 \\\\V_1 = \dfrac{0.250 \times  0.5}{16}\\\\V_1 = 0.0078125\ L = 7.8125 \ mL

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6 0
3 years ago
A sample of Ar gas has a volume of 6.30 L with an unknown pressure. The gas has a volume of 8.57 L when the pressure is 2.74 atm
ExtremeBDS [4]

Answer:

3.73 atm

Explanation:

Since there is no change in temperature, we use Boyle's law.

P₁V₁ = P₂V₂ where P₁ = initial pressure of Ar gas = unknown, P₂ = final pressure of Ar gas = 2.74 atm, V₁ = initial volume of Ar gas = 6.30 L and V₂ = final volume of Ar gas = 8.57 L

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8 0
3 years ago
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