Four samples of gas each exert 675 mm hg in separate 3.5 l containers. what pressure will they exert if they are all placed in a single 3.5 l container? a.169 mm hg b.675 mm hg c.2.36 x 103 d. 2.70 x 103

The pressure that  will  be   exerted if  four sample  of gas are placed in a single  3.5 container  is calculated as below

if  each gas occupies 675  mmhg

what about  4 gases in the sample
by cross  multiplication

= 675 mm hg x 4/1 = 2.7  x10^3mmhg (answer D)

The question is incomplete, the complete question is:

The solubility of slaked lime, , in water is 0.185 g/100 ml. You will need to calculate the volume of M HCl needed to neutralize 14.5 mL of a saturated

The volume of HCl required is 290mL, the mass of is 0.0268g, the moles of

Explanation:

Given values:

Solubility of = 0.185 g/100 mL

Volume of = 14.5 mL

Using unitary method:

In 100 mL, the mass of present is 0.185 g

So, in 14.5mL. the mass of present will be =

The number of moles is defined as the ratio of the mass of a substance to its molar mass.

The equation used is:

......(1)

Given mass of = 0.0268 g

Molar mass of = 74 g/mol

Plugging values in equation 1:

Moles of present =

The chemical equation for the neutralization of calcium hydroxide and HCl follows:

By the stoichiometry of the reaction:

Moles of = Moles of = 0.000724 mol

The formula used to calculate molarity:

.....(2)

Moles of HCl = 0.000724 mol

Molarity of HCl =

Putting values in equation 2, we get:

Hence, the volume of HCl required is 290mL, the mass of is 0.0268g, the moles of