4 years ago

Which element is a noble gas: Ne, Br, or O

Chemistry

2 answers:

Juli2301 [7.4K]4 years ago

4 0

Answer:

_+_

Explanation:

ValentinkaMS [17]4 years ago

3 0

The answer is Ne Neon!!!!!!!!!!!!!!

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If the alum reaction was done starting with 12.000 g of al, how many moles of hydrogen gas would be produced according to the ba

mylen [45]

0.67 moles of hydrogen gas.

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3 years ago

Barbiturates are synthetic drugs used as sedatives and hypnotics. Barbital ( = 184.2 g/mol) is one of the simplest of these drug

DanielleElmas [232]

Answer:

118.75°C is the boiling point of a solution.

Explanation:

Mass of the solute that is barbiturates = 42.5 g

Molar mass of a solute = 184.2 g/mol

Moles of solute = $\frac{42.5 g}{184.2 g/mol}=0.2307 mol$

Mass of the solvent that acetic acid = 825 g = 0.825 kg

$molality=\frac{\text{Moles of solute}}{\text{Mass of solvent}}$

Molality of the solution (m):

$m=\frac{0.2307 mol}{0.825 kg}=0.2796 m$

Elevation in boiling point is given as:

$\Delta T_b=i\times K_b\times m$

i = 1 (organic compound)

$=1\times 3.07^oC/m\times 0.2796 m=0.8585^oC$

$\Delta T_b=T_b-T$

$T_b$ = Boiling temperature of solution.

T = boiling temperature of solvent that is acetic acid=117.9°C

$0.8585^oC=T_b-117.9^oC$

$T_b=118.75 ^oC$

118.75°C is the boiling point of a solution.

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3 years ago

How to obtain sugar from a solution of sugar in water? Why will filtering not work?

yan [13]

Answer:

Sugar can be obtained by evaporation.

Filtering wont work because sugar is soluble in water thus will mix to form one layer.

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3 years ago

For this heterogeneous system 2 A ( aq ) + 3 B ( g ) + C ( l ) − ⇀ ↽ − 2 D ( s ) + 3 E ( g ) 2A(aq)+3B(g)+C(l)↽−−⇀2D(s)+3E(g) th

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Answer:

K = 1.08 X 10¹²

Explanation:

The solved solution is in the attach document

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3 years ago

Who uses petroleum and for what purpose?

FinnZ [79.3K]

Answer:

today, petroleum is mostly used as a source of energy, being rich in combustible carbon in the production of electricity or running some sorts of heat engines. ... Raw petroleum (also known as crude oil) is used in three major ways: Transportation, Electricity Generation, and Material Production.

Explanation:

hope it helps!!!!!!!!!!!!!!!!!!!!!!!!!!

7 0

4 years ago

Read 2 more answers