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yarga [219]
3 years ago
8

If an unknow metal has the mass of 40g and volume of 75ml, what is the density of the metal?

Chemistry
1 answer:
Snowcat [4.5K]3 years ago
6 0

Answer:

d = 0.53 g/mL

Explanation:

Given that,

Mass of an unknown metal = 40 g

The volume of the metal = 75 mL

We need to find the density of the metal. We know that,

Density = mass/ volume

d=\dfrac{40\ g}{75\ mL}\\\\d=0.53\ g/mL

So, the density of the metal is 0.53 g/mL.

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Answer:

b. 2.28 M

Explanation:

The reaction of neutralization of NaOH with H2SO4 is:

2NaOH + H2SO4 → Na2SO4 + 2H2O

<em>Where 2 moles of NaOH react per mole of H2SO4</em>

<em />

To solve the concentration of NaOH we need to find the moles of H2SO4. Using the chemical equation we can find the moles of NaOH that react and with the volume the molar concentration as follows:

<em>Moles H2SO4:</em>

45.7mL = 0.0457L * (0.500mol/L) = 0.02285 moles H2SO4

<em>Moles NaOH:</em>

0.02285 moles H2SO4 * (2moles NaOH / 1 mol H2SO4) = 0.0457moles NaOH

<em>Molarity NaOH:</em>

0.0457moles NaOH / 0.020L =

2.28M

Right option:

<h3>b. 2.28 M</h3>
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2 years ago
Which formula represents a hydrocarbon with a double covalent bond?
Nataliya [291]

Answer:

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4 0
2 years ago
Please help quick<br> Alkali means ___.
sveticcg [70]

Answer:

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Explanation:

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8 0
3 years ago
24. The air in a small 250 cm birthday balloon is at a pressure of 760 torr. A boy sits on it at
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Answer:

1.14atm

Explanation:

Given parameters:

V1 = 250cm³ ;

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Unknown:

New pressure = ?

Solution:

To solve this problem, we apply Boyle's law and we use the expression below:

       P1 V1 = P2V2

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