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Elina [12.6K]
2 years ago
5

If you were presented with 2 liters of a 2m sucrose stock solution, how many grams of sugar would be in a 100ml aliquot?

Chemistry
1 answer:
HACTEHA [7]2 years ago
7 0

Answer:

68.46 gms

Explanation:

2 molal solution means there is 2 moles of sucrose per kg of solvent (generally 1000 cc)

2 moles / 1000 ml * 100 ml = .2 moles

mole weight of sucrose = 342.3 gm/mole

342.3 gm/mole * .2 mole = 68.46 gms

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In what circumstance would the complete and net ionic equations for a reaction be identical?
Yakvenalex [24]

Answer: Complete ionic equations dissociate all aqueous solutions into ions. Net ionic equations show the change that occurs in chemical reactions and do not show spectator ions that are the same in reactants and products. (b) If no spectator ions were present then complete and net ionic equations would be identical.

Explanation:

8 0
3 years ago
There are _______ alkanes with molecular formula C15H32
Mkey [24]

Answer:

There are <u>4</u><u>3</u><u>4</u><u>7</u><u> </u>alkanes with that molecular formula.

I hope this helps

8 0
3 years ago
Calculate the solubility (in grams per 1.00×102mL of solution) of magnesium hydroxide in a solution buffered at pH = 12
GaryK [48]
The Ksp of Mg(OH)2 in water is 1.8 x 10-<span>11. This means that in pure water, Mg(OH)2 has a solubility of:
</span>∛[(1.8 x 10-11) / 4] = 1.65 x 10-4 mol/L
<span>which is equal to
</span>1.65 x 10-4<span> mol x (58.32) / 10 x 100 mL =  9.62 x 10-4g / 1x102 mL

If the pH is 12, the hydroxide concentration in the solvent is
10^-(14-12) = 0.01 mol/L
The solubility is solve using the formula
</span>1.8 x 10-11 = x (2(0.01 + x))^2
x = 4.5x10-8 mol/L
which is equal to
4.5x10-8 mol x (58.32) / 10 x 100 mL =  2.62 x 10-7g / 1x102 mL
8 0
4 years ago
Kiley wants to balance the equation H2 + N2 → NH3. Which would be her first step in balancing an equation?
balandron [24]

Answer: The balanced equation will be

6H2 + N2 → 2NH3

Explanation:

First step is to balance nitrogen

ie, H2 + N2 → 2NH3

Second step is to balance hydrogen accordingly

ie, 6H2 + N2 → 2NH3

This is the perfect balanced equation.

6 0
3 years ago
Read 2 more answers
Please work out all the problems on this page, no links, no i don't knows please do not take advantage of me or my points please
Elenna [48]
A chemical change must occur
6 0
3 years ago
Read 2 more answers
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