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Alja [10]
3 years ago
12

Twenty irregular pieces of an unknown metal have a collective mass of 28.225 g. When carefully placed in a graduated cylinder th

at originally contained 7.75 mL of water, the final volume read 11.70 mL. What is the density of the metal (in g/cm3)?
Chemistry
1 answer:
Lelechka [254]3 years ago
8 0

Explanation:

Use the density formula to determine the volume of the piece of metal.

density

=

mass

volume

Rearrange the equation to isolate volume.

volume

=

mass

density

volume

=

147

g

7.00

g

mL

=

21.0 mL

The final volume in the cylinder after adding the piece of metal is

20.0 mL

+

21.0 mL

=

41.0 mL

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Answer:

Molarity = 0.4M

Explanation:

Molar mass of NaOH (M)= 40

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n= m/M=[8/40]= 0.2mol

Applying

n= CV

0.2= C×0.5

C= 0.4M

8 0
3 years ago
Which salt is formed whenHCI is mixed with the sodium hydroxide write formula equation?​
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I will list them from alkaline with the lowest boiling point and alkaline with the highest.

1. C2H6 
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8 0
3 years ago
Density is an intensive physical property that relates the mass of an object to its volume. Density, which is simply the mass of
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Explanation:

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Putting in the values we get:

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6 0
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A sample of gas in a balloon has an initial temperature of 20. ∘C and a volume of 1.92×103 L . If the temperature changes to 68
morpeh [17]

Answer:

\boxed{2.23 \times 10^{3} \text{ L}}

Explanation:

The pressure is constant, so we can use Charles' Law.

\dfrac{ V_{1} }{T_{1}} = \dfrac{ V_{2} }{T_{2}}

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T₂ = (68 + 273.15) K = 341.15 K

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The new volume of the gas is \boxed{2.23 \times 10^{3} \text{ L}}.

6 0
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