3 years ago

Please answer as (a;3) < example>

Chemistry

1 answer:

never [62]3 years ago

7 0

A;4, b;6, c;7, d;5, e;8, f;3

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Calculate the molarity of a 2.43 mol aqueous NaCl solution with a density of 2.00 g/mL.

anygoal [31]

Answer:

You need to add more points people will not answer if its this low

Explanation:

3 0

3 years ago

hat is the pressure of CO(g) in equilibrium with the CO2(g) and O2(g) in the atmosphere at 25 ????C? The partial pressure of O2(

Lubov Fominskaja [6]

Answer:

The partial pressure of CO is 5.54x10⁻⁴⁹atm. You shouldn't worry because it is very low pressure

Explanation:

First, the balanced reaction is:

CO + 1/2O₂ → CO₂

The energies of formation are:

ΔG(CO)=-137.168kJ/mol

ΔG(O₂)=0

ΔG(CO₂)=-394.359kJ/mol

The energy of the reaction is:

$delta-G_{reaction} =delta-G_{CO_{2} } -(delta-G_{CO} +1/2delta-G_{O_{2} } )\\delta-G_{reaction}=-394.359-(-137.168+0)=-257.191kJ/mol$

The expression for calculate the partial pressure of CO is:

$p_{CO} =\frac{p_{CO2} }{p_{O_{2} }^{1/2}*exp^{-\frac{delta-G}{RT} } } \\p_{CO}=\frac{3x10^{-4} }{0.2^{1/2}*exp(-\frac{-257.191*1000}{8.314*298} ) } \\p_{CO}=5.54x10^{-49} atm$

5 0

3 years ago

How much pure acid is in 520 milliliters of a 13 % solution?

Liono4ka [1.6K]

It actually depends on the percentage of the concentration give. Percentages can be expressed as %mass/mass, %volume/volume or %mass/volume. To keep things simple, let's just assume that it is in %volume/volume. Thus, 13% of 520 mL is pure acid.

Volume of pure acid = 520*0.13 = 67.6 mL

4 0

3 years ago

How many moles of water are formed from 0.65 moles of oxygen?

sleet_krkn [62]

Answer:

two moles of water

hope this helps

7 0

3 years ago

Which scientist arranged the elements in order of increasing atomic number, rather than increasing atomic mass? Antoine Lavoisie

Natalka [10]

The answer is Henry Moseley