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3 years ago

7

The gas in a cylinder has a volume of 7 liters at a pressure of 107kPa. The pressure of the gas is increased to 208kPa. Assuming

the temperature remains constant, what would the new volume be?

1 answer:

VashaNatasha [74]3 years ago

6 0

By Boyles Law (P1V1=P2V2), substituting values in and solving for V2, we find that the new volume is 3.6 L<span />

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A 10.00 mL sample of a solution containing formic acid (a weak acid) was placed in a 25 mL volumetric flask and diluted to the m

Eddi Din [679]

Answer:

Molarity: 0.522M

Percentage by mass: 2.36 (w/w) %

Explanation:

Formic acid, HCOOH reacts with NaOH as follows:

HCOOH + NaOH → NaCOOH + H₂O

To solve this question we must find the moles of NaOH added = Moles formic acid. Taken into account the dilution that was made we can find the moles -And molarity of formic acid and its percentage by mass as follows:

<em>Moles NaOH = Moles HCOOH:</em>

0.01580L * (0.1322mol / L) =0.002089 moles HCOOH

<em>Moles in the original solution:</em>

0.002089 moles HCOOH * (25mL / 10mL) = 0.005222 moles HCOOH

<em>Molarity of the solution:</em>

0.005222 moles HCOOH / 0.01000L =

<h3>0.522M</h3>

<em>Mass HCOOH in 1L -Molar mass: 46.03g/mol-</em>

0.522moles * (46.03g / mol) = 24.04g HCOOH

<em>Mass solution:</em>

1L = 1000mL * (1.02g / mL) = 1020g solution

<em>Mass percent:</em>

24.04g HCOOH / 1020g solution * 100

2.36 (w/w) %

7 0

3 years ago

Le Châtelier's principle tells us that chemical _____ will adjust in an attempt to remove a stressor.

lawyer [7]

Le Châtelier's principle tells us that chemical <span>c. equilibrium </span>will adjust in an attempt to remove a stressor.

8 0

3 years ago

According to Archimedes' principle, the mass of a floating object equals the mass of the fluid displaced by the object. A 150-lb

julsineya [31]

Answer:

The density of the swimmer is 0.0342 lbm/in3.

This value makes sense as the density of the body is very similar to the water.

Explanation:

If the swimmers is floating, the weight of the swimmer must be equal to the upward buoyant force.

We can express the weight force as the product of density and volume of the swimmer.

Then

$\rho_{swimmer}*V_{swimmer}=\rho_{water}*V_{water_displaced}\\\\\rho_{swimmer}*V_{swimmer}=\rho_{water}*0.95**V_{swimmer}\\\\\rho_{swimmer}=0.95*\rho_{water}\\\\\rho_{swimmer}=0.95*0.036 lbm/in3\\\\\rho_{swimmer}=0.0342lbm/in3$

It makes sense as the density of the body is very similar to the water.

5 0

3 years ago

What would be the formula for diphosphorus pentoxide ?

aleksley [76]

PbCr04 + P4O10

Hope this helps!

3 0

3 years ago

Read 2 more answers

Chlorine reacts with sodium and with hydrogen.

Sonbull [250]

Answer:

Sodium Chloride has Ionic bond while Hydrogen Chloride has covalent bond.

Explanation:

Na has 11 electrons (2, 8, 1) and need to give away 1 electron to be stable

Cl has 17 electrons ( 2, 8, 7) and needs 1 electron to be stable.

Na transfers 1 electron to CL to form Ionic bond.

While

Hydrogen has 1 electron and shares with Chlorine to be stable.

Covalent bond involves sharing.

3 0

3 years ago