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3 years ago

Hlo ;) lol im banned and my name is kimboslicer it is so sad my accout is bloked 4 23:12

Chemistry

2 answers:

s2008m [1.1K]3 years ago

8 0

Answer:

My old acc got banned

Explanation:

Sonbull [250]3 years ago

3 0

Answer:

lol im sorry man

Explanation:

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Sample of 200mls of 0.5 sulphuric acid,was asked to produce 1.2M of the new solution.Calculate the volume of the new solution

uysha [10]

Answer: The volume of the new solution is 83.33 mL.

Explanation:

Given: $V_{1}$ = 200 mL, $M_{1}$ = 0.5 M

$V_{2}$ = ?, $M_{2}$ = 1.2 M

Formula used to calculate the volume of new solution is as follows.

$M_{1}V_{1} = M_{2}V_{2}$

Substitute the values into above formula as follows.

$M_{1}V_{1} = M_{2}V_{2}\\0.5 M \times 200 mL = 1.2 M \times V_{2}\\V_{2} = 83.33 mL$

Thus, we can conclude that volume of the new solution is 83.33 mL.

5 0

3 years ago

What is the momentum of a 3 kg bowling ball moving at 3 m/s?

Elena-2011 [213]

Answer:

9 kg • m/s..........................

5 0

3 years ago

Trisha and her lab partner were conducting a variety of experiments to produce gases: hydrogen, oxygen, and carbon dioxide. In o

GaryK [48]

Given:

Volume of HCl = 150 ml

Molarity of HCl = 0.10 M

To determine:

The # moles of HCl

Explanation:

The molarity of a solution is the number of moles of a solute dissolved in a given volume

In this case:

Molarity of HCl = moles of HCl/volume of the solution

moles of HCl = Molarity * volume = 0.10 moles.L-1 * 0.150 L = 0.015 moles

Ans: A)

Moles of HCl is 0.015

7 0

4 years ago

The mole fraction of CO2 in a certain solution with H2O as the solvent is 3.6 × 10−4. What is the approximate molality of CO2 in

nataly862011 [7]

Answer: C) 0.020 m

Explanation:

Molality of a solution is defined as the number of moles of solute dissolved per kg of the solvent.

$Molality=\frac{n\times 1000}{W_s}$

where,

n = moles of solute

$W_s$ = weight of solvent in g

Mole fraction of $CO_2$ is = $3.6\times 10^{-4}$ i.e. $3.6\times 10^{-4}$ moles of $CO_2$ is present in 1 mole of solution.

Moles of solute $(CO_2)$ = $3.6\times 10^{-4}$

moles of solvent (water) = 1 - $3.6\times 10^{-4}$ = 0.99

weight of solvent = $moles\times {\text {Molar mass}}=0.99\times 18=17.82g$

Molality = $\frac{3.6\times 10^{-4}\times 1000}{17.82g}=0.020$

Thus approximate molality of $CO_2$ in this solution is 0.020 m

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4 years ago

2 main reasons why we have seasons.

Ket [755]

Answer:

Tilt of a planet's axis and its orbit around the sun.

Explanation:

hope this helps! :)

3 0

3 years ago