A mixture whoose parts are the same throughout

Chemistry

2 answers:

Yakvenalex [24]4 years ago

7 0

Homogeneous is the mixture that is the same throughout. Just think homo means same.

Anit [1.1K]4 years ago

4 0

A homogeneous mixture is a mixture whose parts are the same throughout.

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What is an empirical formula for a compound that is 82.2% nitrogen and 17.8% hydrogen

makkiz [27]

Percent to mass
Mass to mole
Divide by small
Multiply 'til whole

Assume 100 g of substance, then 82.2 g N and 17.8 g H.

82.2 g N * (1 mol/14.01 g N) = 5.86 mol N
17.8 g H * (1 mol/1.01 g H) = 17.6 mol H

Divide by the smallest mole
17.6 H / 17.6 = 1 H
5.86 N / 17.6 = 1/3 N

Multiply to make whole number ( x3 in this case)
3 x 1 H = 3H
3 x 1/3 N = 1 N

NH3

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Sedbober [7]

Answer :The corrected answer is given below;

Weak bases react with water to form the hydroxide ion and the conjugate acid of the base. Concentration in solution does not affect whether an acid or a base is strong or weak.

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3 years ago

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Can you please tell me the steps to figure how the answers to number 2?

Evgesh-ka [11]

Answer:

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Explanation:

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How many molecules are in 2.50 moles of H2O?

Aliun [14]

Answer:

$A.1.51*10^{24}\ molecules\ of\ H_2O$

Explanation:

$We\ are\ given:\\No.\ of\ moles\ of\ H_2O\ provided=2.5\ moles\\Now,\\We\ know\ that,\\ Avagadro's\ Constant=6.022*10^{23}\\Now,\\We\ also\ know\ that:$

$No.\ of\ particles=No.\ of\ moles*Avagadro's\ Constant\\Hence,\ here,\\No.\ of\ molecules\ in\ 2.5\ moles\ of\ H_2O=2.5*6.022*10^{23}\\Hence,\\No.\ of\ molecules\ in\ 2.5\ moles\ of\ H_2O=15.055*10^{23}\ H_2O\ molecules\\Now,\\No.\ of\ molecules\ in\ 2.5\ moles\ of\ H_2O=1.5055*10^{24}\ H_2O\ molecules\\ or\ 1.51*10^{24}\ H_2O\ molecules$

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