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Gnoma [55]
3 years ago
8

2. Arnie is going to dissolve 2.65g of zinc using 6.0M hydrochloric acid. A) what volume of the acid will he need to dissolve al

l the zinc? B) He wants to collect the gas produced by the reaction in a container, determine the volume of container he will need if the pressure is 628 mmHg and temperature is 23ᵒC. C) What is the mass of the zinc chloride he will produce? You will need a balanced equation and a gas law for this question.
Chemistry
1 answer:
fenix001 [56]3 years ago
5 0

Answer:

Explanation:

Zn + 2HCl = ZnCl₂ + H₂

A ) mole of Zn = 2.65 / 65

= .04 mol

mole of HCl required = .04 x 2 mol

.08 mol

If v be the volume required

v x 6 = .08

v = .0133 liter

= 13.3 cc

B )

volume of gas at NTP :

moles of gas  obtained = .04 moles

= 22.4 x .04 liter

= .896 liter

we have to find this volume at given temperature and pressure

\frac{P_1V_1}{T_1} =\frac{P_2V_2}{T_2}

\frac{760\times.896}{273} =\frac{628\times V_2}{296}

V_2 = 1.175 liter.

C )

.04 mole of zinc chloride will be produced

mol weight of zinc chloride

= 65 + 35.5 x 2

= 136 gm

.04 mole = 136 x .04

= 5.44 gm

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The particle model does not take into account: the size and shape of particles. the space between particles.

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The volume of a gas is reduced from 4 L to 0.5 L while the temperature is held constant. How does the gas pressure change?
liberstina [14]

Answer:

It increases by a factor of eight

Explanation:

When temperature is held constant, gas pressure changes according the volume, in undirectly proportion.

Volume increases →  Pressure decreases

Volume decreases → Pressure increases

As volume gas, was reducted from 4L to 0.5L, it was reduced by 1/8, so the pressure gas was increased by a factor of eight.

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3. A measurement of the freezing temperature of a solution allowsyou to calculate the concentration of the solution. What else d
Harman [31]

Answer:

Osmotic pressure and boiling point elevation

Explanation:

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In the boiling point elevation you can determine the number of moles of the solute in the solution by using the Molality formula.

5 0
3 years ago
What is 140.2 in scientific notation
Akimi4 [234]

Answer:

1.402 * 10^2.

Explanation:

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4 0
3 years ago
Read 2 more answers
PLEASEEEE HELP :')
mel-nik [20]

Answer:

340 grams Ca₃P₂ (2 sig. figs.)

Explanation:

   3Ca     +     2P     =>    Ca₃P₂

5.6 mole + excess =>   ? grams

Convert the 'known' to a coefficient of 1 by dividing all coefficients by 3.

=>  Ca   +   2/3P   =>    1/3Ca₃P₂

From the above, 1 mole of Ca => 1/3 mole Ca₃P₂  

∴ 5.6 mole Ca in an excess of P => 1/3(5.6 mole) Ca₃P₂

=> 1.8666 mol Ca₃P₂ (calculator answer) ≅ 1.9 mol Ca₃P₂

=> 1.9 mole x 182 g Ca₃P₂/mol Ca₃P₂ = 339.73333 grams Ca₃P₂

≅ 340 grams Ca₃P₂ (2 sig. figs.)

7 0
3 years ago
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