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3 years ago

GoOd MoRnInG EvErY OnE BlA BlA BlA BlA

Chemistry

2 answers:

Radda [10]3 years ago

7 0

Answer:

good morning

Explanation:

azamat3 years ago

4 0

Answer:

you too ^^

Explanation:

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Which state of matter has particles that vibrate in a rigid structure

dedylja [7]

Explanation:

Solids have definite shape and distinct boundaries as such the intermolecular forces between them is maximum

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4 years ago

Carbon dioxide is treated with coke.

Troyanec [42]

It reacts with it and creates carbon monoxide and the affects of it weakens

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3 years ago

In which solid sound travel faster than any others.ans me pls

Crank

Answer:

THE SOUND TRAVELS FASTER IN SOLIDS BECAUSE ITS MOLECULES ARE CLOSE TO EACH OTHER WHILE LIQUIDS MOLECULES ARE NOT TIGHT AS OF SOLID AND IN GAS THE MOLECULES ARE FREE

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3 years ago

Read 2 more answers

How many atoms of potassium are in 0.250 mol of potassium carbonate, k2co3?

Verizon [17]

The number of potassium atom that are in 0.25 moles potassium carbonate is calculated as follows

by use of Avogadro contant

1 mole= 6.02 x10^23 atoms

what about 0.25 moles,
by close multiplication

{0.250 moles x 6.02 x10^23} / 1 mole = 1.505 x10^23 atoms

4 0

4 years ago

The solubility of acetanilide is 12.8 g in 100 mL of ethanol at 0 ∘C, and 46.4 g in 100 mL of ethanol at 60 ∘C. What is the maxi

weqwewe [10]

Answer: 72.41% and 26.90% respectively.

Explanation:

At 60°C, you can dissolve 46.4g of acetanilide in 100mL of ethanol. If you lower the temperature, at 0°C, you can dissolve just 12.8g, which means (46.4g-12.8g)=33.6g of acetanilide must have precipitated from the solution.

We can calculate recovery as:

$\%R=\frac{crystalized\ mass}{initial\ mass}*100 =\frac{33.6\ g}{46.4\ g}*100=72.41\%$

So the answer to the first question is 72.41%.

For the second part just use the same formula, the mass of the precipitate is the final mass minus the initial mass, (171mg-125mg)=46mg.

$\%R=\frac{crystalized\ mass}{initial\ mass}*100 =\frac{46\ mg}{171\ mg}*100=26.90\%$

So the answer to the second question is 26.90%.

3 0

3 years ago