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3 years ago

Describe a procedure to separate a mixture of sugar, black pepper, and pebbles.

1 answer:

8 0

1) As pebbles are solid compounds, pour it into filter, it would extract every particle of pebbles.

2) Then, with the use of filter, we need to extract pepper from the compound.

3) Now, Add water 'cause we need to dissolve salt with it.

Hope this helps!

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Who uses chemicals?

Schach [20]

A. Everyone. Ppl use chemicals everyday and don’t even know it. And that’s why its everyone periodt

7 0

4 years ago

The temperature of a sample of gas at 8.5 atm and 59.2 °C increases to 140.0 °C. If the

labwork [276]

Answer:

since that's the closest option we have

10.6atm

Explanation:

Since volume is constant

P1/T1 = P2/T1

P1 =8.5atm

T1 = 59.2°C = 332.2k

T2 = 140°C = 413k

P2 = ?

8.5/332.2 = P2/413

0.026 = P2/413

P2 = 0.026 x 413

P2 = 10.74atm

5 0

3 years ago

How many molecules are there in 6.07g of Ag2CO3

Mice21 [21]

There are $1.3244 \times 10^{22}$ molecules in 6.07 grams of silver carbonate.

Explanation:

Moles of a compound is defined as ratio of mass of the compound to the molar mass of the compound.

$Moles(n)=\frac{\text{Mass of the compound}(m)}{\text{Molar mass of the compound}(M)}$

1 mole corresponds to $N_A$ numbers of atoms or molecules or ions.

1 mole = $N_A$

$N_A$ = Avogadro number = $6.022 times 10^{23}$ atoms, molecules/ions

Number of molecules particles in 'n' moles of compound:N

$N = n\times N_A$

Mass of silver carbonate,m = 6.07 g

Molar mass of carbonate ,M= 276 g/mol

Moles of silver carbonate = n

$n=\frac{m}{M}=\frac{6.07 g}{276 g/mol}=0.02199 mol$

Number of molecules of silver carbonate in 0.02199 moles.

$N=n\times N_A=0.02199 mol\times 6.022 times 10^{23}=1.3244 \times 10^{22} molecules$

There are $1.3244 \times 10^{22}$ molecules in 6.07 grams of silver carbonate.

4 0

4 years ago

A Mole of elephants would weigh how much more than the moon? I got 6.301x10^23 and set the problem up like this: 6.022x10^23 x 2

Margaret [11]

Answer:

The Moon weighs about 7.349*10^22 kg

How much does “an elephant” weigh? Grown-up elephants vary between 1.7 tons (small wood elephant cow) and 6 tons (big African elephant bull). Let us pick 2.720 tons or 2720 kg as an average weigh one, this is valid for Asian elephants.

A mole of elephants weighs 6.022 * 10^23 x 2720 kg = 1.638 * 10^27 kg.

That is 1,638 * 10^27 / 7,349*10^22 = 22289 times more.

5 0

3 years ago

How many grams are there in 2.30x10^24 atoms of silver?

Luden [163]

Answer:

107.8682 grams.

Explanation:

5 0

3 years ago