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andrey2020 [161]
2 years ago
8

If 32 L of hydrogen react with excess oxygen at STP to form water, how much energy will be released?

Chemistry
1 answer:
Fudgin [204]2 years ago
4 0

Answer:

??????????????????

Explanation:

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How many grams of NaOH are produced from 1.20 x 10^2 of Na2O
oksian1 [2.3K]
Write an balance the equation

Na2O + H2O -> 2 NaOH

Calculate the molecular mass of Na2O and NaOH from the atomic mass from the periodic table.

Na = 23
O=16
H=1

Na2O = 23 * 2 + 16 = 62
NaOH = 23+16+1= 40

For the stoichiometry of the reaction one mole of Na2O = 62g produce two mol of NaOH = 2* 40= 80 g

120 g Na2O x 80g NaOH / 62g Na2O=

154.8 g NaOH
5 0
3 years ago
Electrochemical cells can be used to measure ionic concentrations. A cell is set up with a pair of Zn electrodes, each immersed
Phantasy [73]

Answer:

the concentration of the solution is 0.00906 M

Explanation:

Given the data in the question;

we know that from Nernst Equation;

E = E⁰ - ((0.0592/n) logQ)

now, E₀ for concentration cell is 0

n for this redox is 2

concentration of the unknown solution is x

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divide both side by 0.0296

1.52 = -log( x/0.300 )

x/0.300 = 10^{-1.52

x/0.300 = 0.0301995

we cross multiply

x = 0.300 × 0.0301995

x =  0.00906 M

Therefore, the concentration of the solution is 0.00906 M

6 0
3 years ago
Why does foliation occur? (Metamorphic rock)
dusya [7]
Foliation occurs when the pressure squeezes the flat or elongated minerals within a rock so that they become aligned.
5 0
2 years ago
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What is one reason scientists have developed a system to classify organisms?
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Answer:

c

Explanation:

6 0
2 years ago
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SOMEBODY PLEASE HELP MEE !!!
Angelina_Jolie [31]
Ok the first one (C) for all of the answers is 6 and for the seconds one (Ca) the answers are 20
5 0
2 years ago
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