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Andrew [12]
3 years ago
7

PLEASE HELP NOW! i need help

Chemistry
2 answers:
vladimir1956 [14]3 years ago
7 0
N is going to equal 0.82
never [62]3 years ago
5 0

Answer:

0.82 mol of gas

Explanation:

pv=nRT

(0.7 atm)(30L) = n (0.0817 L atm/mol K) (315 K)

n = 0.82 mol

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Which solution would have the lowest freezing point
Vitek1552 [10]

Answer:

Ice and water

Explanation:

4 0
3 years ago
Balance the equation, Al203 + H2S04 to Al2(S04)3 + H20
lubasha [3.4K]

It is 1-3-1-3

so 1Al2O3 + 3H2So4 ---> 1Al2(So4)3 +  3H2O

8 0
3 years ago
1) A light bulb takes in 30 of energy per second. It transfers 3j as use
natta225 [31]

Answer:

\boxed{\text{10 \%}}

Explanation:

The formula for efficiency is  

\begin{array}{rcl}\text{Efficiency} & = & \dfrac{\text{useful energy out}}{\text{energy in}} \times 100 \,\% \\\\\eta & = & \dfrac{w_{\text{out}}}{w_{\text{in}} } \times 100 \,\%\\\end{array}

Data:

Useful energy =  3 J

Energy input  = 30 J

Calculation:

\begin{array}{rcl}\eta & = & \dfrac{\text{3 J}}{\text{30 J}} \times 100 \,\%\\\\\eta & = & 10 \, \%\\\end{array}\\\text{ The efficiency is }\boxed{\textbf{10 \%}}

8 0
3 years ago
An excess of hydrogen ions in the body fluids can have disastrous results because
natita [175]

excess hydrogen ions can break chemical bonds

, can change the shape of large complex molecules, rendering them nonfunctional and can disrupt tissue function.

3 0
3 years ago
Read 2 more answers
Identify any solutes and solvents present in a mixture of 0.05 mol ethanol, 1 liter water, and 0.2 g hydrogen
Varvara68 [4.7K]

Answer:

Water is the solvent

Both the ethanol and the hydrogen peroxide are the solute

Explanation:

Both the hydrogen peroxide and ethanol are sisobable in water.

There are 0.05 moles of ethanol.

1 litreof water contains 55.55 moles of water.

0.2 g of hydrogen peroxide contains 0.2/34 = 0.0059 moles of hydrogen peroxide (the 34 is the molar mass of hydrogen peroxide).

Since there are more moles of water, water becomes the solvent and the other two liquids dissolve in it.

6 0
3 years ago
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