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2 years ago

How many moles are in 5g of Al?A.0.185B.18.5C.5.4D.135

Chemistry

2 answers:

ycow [4]2 years ago

7 0

The answer is •D)135• it added up to 134.91 but if you round it it’s 135☻︎

Lapatulllka [165]2 years ago

3 0

I got 134.91 but if you round it you’ll get 135

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You have prepared a saturated solution of x at 20∘c using 39.0 g of water. how much more solute can be dissolved if the temperat

AleksAgata [21]

for 39g water solute dissolved at 20C = solubility ( g/ 100 g H2O ) × mass of water = ( 11g / 100g H2O ) × 39g H2O = 4.29 g

amount of solute dissolved at 30 C =

= 23 / 100 * 39 = 8.97 g

Amount of extra solute dissolved = 8.97 - 4.29 = 4.7 g

3 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

2 years ago

How many types of alkanol do we have

oksano4ka [1.4K]

I think you mean alcohol ? if so there are a few basic types including ethanol

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2 years ago

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vazorg [7]

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5.4 g = 100%
3.72 g = x
x=68.9 %

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2 years ago

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podryga [215]

Answer:

5.84e+21

Explanation:

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2 years ago