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3 years ago

What is the partial pressure of the third gas, helium?

Chemistry

1 answer:

Fofino [41]3 years ago

8 0

<span>If my math is correct .768 g </span>

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Perform the following operation

Paul [167]

$\quad \huge \quad \quad \boxed{ \tt \:Answer }$

$\qquad \tt \rightarrow \:2.8 × {10}^{-5}$

____________________________________

$\large \tt Solution \: :$

$\qquad \tt \rightarrow \: \dfrac{2.36 \times 10 {}^{ - 2} }{8.4 \times {10}^{2} }$

$\qquad \tt \rightarrow \: \dfrac{2.36 }{8.4 } \times \cfrac{10 {}^{ - 2} }{10 {}^{2} }$

$\qquad \tt \rightarrow \: 0.28 \times 10 {}^{ - 2 - 2}$

$\qquad \tt \rightarrow \: 0.28 \times 10 {}^{ - 4}$

$\qquad \tt \rightarrow \: 2.8 \times 10 {}^{ - 5}$

Answered by : ❝ AǫᴜᴀWɪᴢ ❞

4 0

1 year ago

True or False: Rubbing a balloon on your head for a longer amount of time will increase the attractive force of the balloon.

Andreyy89

Answer:

Explanation:

4 0

3 years ago

A chemist prepares a solution of barium acetate by measuring out of barium acetate into a volumetric flask and filling the flask

leonid [27]

The given question is incomplete. The complete question is :

A chemist prepares a solution of barium acetate by measuring out 32 g of barium acetate into a 350 ml volumetric flask and filling the flask to the mark with water. Calculate the concentration in of the chemist's barium acetate solution. Round your answer to significant digits.

Answer: The concentration of barium acetate solution is 0.375 mol/L

Explanation:

Molarity of a solution is defined as the number of moles of solute dissolved per liter of the solution.

$Molarity=\frac{n\times 1000}{V_s}$

where,

n = moles of solute

$V_s$ = volume of solution in ml

moles of $Ba(CH_3COO)_2$ = $\frac{\text {given mass}}{\text {Molar mass}}=\frac{32g}{255g/mol}=0.125mol$

Now put all the given values in the formula of molality, we get

$Molarity=\frac{0.125\times 1000}{350ml}$

$Molarity=0.357M$

Therefore, the concentration of solution is 0.375 mol/L

8 0

3 years ago

2. Al + Fe2O3 → Al2O3 + Fe (Need to balance equation)

shtirl [24]

Balanced equation: 2Al+Fe2O3–> Al2O3+2Fe

Using mole calculations you can find that 10g of Al produces 24.3g of Fe under the conditions described

4 0

3 years ago

A coffee cup calorimeter will not be used to directly measure the enthalpy of magnesium combustion because

yanalaym [24]

Answer:

A coffee cup calorimeter is great for measuring heat flow in a solution, but it can't be used for reactions that involve gases since they would escape from the cup. The coffee cup calorimeter can't be used for high-temperature reactions, either, because they would melt the cup.

8 0

3 years ago

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