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Ivanshal [37]
2 years ago
7

More Chem.

Chemistry
1 answer:
kiruha [24]2 years ago
8 0
The given percentage is that of the solute, so we subtract it from 100% to get the percentage of solvent.

a) 50 x 0.95
= 47.5 ml of solvent

b) 1250 x 0.96
= 1200 ml of solvent.
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What is the noble gas notation for carbon?
Shkiper50 [21]

<span>The noble gas notation for Carbon is [He] 2s2 2p<span>2</span></span>

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3 years ago
Please I would give brainiest to anyone who answers number 2 and 3 for me
DerKrebs [107]

can you upload a clearer photo?

6 0
3 years ago
3
Zina [86]

Answer:

Explanation:

n CaCO3 = mass / m.wt

             = 500  /( 40 + 12 + 16x 3)

           =   5 mole

n CaO = 5 moles  ( from the balanced equation we have 1:1 moles )

mass of CaO = nCaO X m.wt

                       5 x(  40 +16 )

                 =   280 grams

5 0
3 years ago
The isomerization of methylisonitrile to acetonitrileCH3NC(g)→CH3CN(g)is first order in CH3NC . The rate constant for the reacti
lisabon 2012 [21]

Answer:

Option E, Half life = 2.96\times 10^3\ s

Explanation:

For a first order reaction, rate constant and half-life is related as:

            t_{1/2}=\frac{0.693}{k}

Where,

t_{1/2} = Half life

k = Rate constant

Rate constant given = 2.34\times 10^{-4}\ s^{-1}

t_{1/2}=\frac{0.693}{k}

=\frac{0.693}{2.34 \times 10^{-4}}=2.96\times 10^3\ s

So, the correct option is option E.

4 0
3 years ago
How much silver chloride is precipitated when 25.0 g of calcium chloride and 25.0 g of silver nitrate are mixed together in a be
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Answer:

<u>2</u><u>1</u><u>.</u><u>0</u><u>9</u><u> </u><u>g</u><u> </u><u>of</u><u> </u><u>AgCl</u>

Explanation:

Hopefully the picture is clear and the method is understandable.

For more information go to

https://socratic.org/questions/5631d10b11ef6b4609a78ee2

7 0
3 years ago
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