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3 years ago

5

Sandra pushed a wooden block and it slid across the floor. The wooden block gradually slowed down and stopped after moving 10 me

ters.
Why did the block stop moving?

2 answers:

jarptica [38.1K]3 years ago

8 0

Answer:

Because it lost momentum!

Explanation:

Hope this helps! Plz mark brainliest! :)

astraxan [27]3 years ago

4 0

It lost the momentum

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If the number of moles of a gas initially contained in a 2.10 l vessel is doubled, what is the final volume of the gas in liters

Anon25 [30]

Avagadro's law gives the relationship between volume of gas and number of moles of the gas. When the temperature and pressure are constant, volume is directly proportional to number of moles of gas.
$\frac{V1}{n1} = \frac{V2}{n2}$
V -volume and n - number of moles of gas.
parameters for the first instance are on the left side and parameters for the second instance are on the right side of the equation
initial number of moles n1 - N
n2 - 2N as the number of moles are doubled
V1 - initial volume - 2.10 L
V2 - final volume - V
substituting the values in the equation
$\frac{2.10L}{N} \frac{V}{2N}$
V = 4.20 L
final volume is 4.20 L

7 0

3 years ago

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balandron [24]

B. .175

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4 0

3 years ago

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cupoosta [38]

Answer: it is one parent

and a

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3 years ago

The graph shows the distribution of energy in the particles of two gas samples at different temperatures, T, and T2. A, B, and C

Serhud [2]

Answer:

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Explanation:

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3 years ago

Pb(CH3COO)2 + H2S → PbS + CH3COOH (Need to balance equation)

astra-53 [7]

Answer:

Mass of PbS = 9.26 g

Explanation:

Data Given :

mass of H₂S = 5.00 g

mass of PbS = ?

Reaction Given:

Pb(CH₃COO)₂ + H₂S ----→ PbS + CH₃COOH

Solution:

Balance the equation:

Pb(CH₃COO)₂ + H₂S ----→ PbS + 2CH₃COOH

Now Look for the number of moles of H₂S and PbS meta

Pb(CH₃COO)₂ + H₂S ----→ PbS + 2CH₃COOH

1 mol 1 mol

So,

1 mole of H₂S combine with excess (unlimited) supply of Pb(CH₃COO)₂ and produce 1 moles of PbS

Now Convert moles to mass for which we have to molar masses of H₂S and PbS

Molar mass of H₂S = 2 + 32 = 43 g/mol

Molar mass of PbS = 31 + 32 = 63 g/mol

Pb(CH₃COO)₂ + H₂S -------→ PbS + 2CH₃COOH

1 mol (34 g/mol) 1 mol (63 g/mol)

34 g 63 g

So,

34 g of H₂S produces 63 grams of PbS.

Now

What mass of silver is produced from 5 g of H₂S

Apply unity formula

34 g of H₂S ≅ 63 g of PbS

5 g of H₂S ≅ X g of PbS

By doing cross multiplication

Mass of PbS = 63 g x 5 g / 34 g

Mass of PbS = 9.26 g

8 0

3 years ago