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3 years ago

The molar mass of Cu is 63.55 g/mol. The number of grams of Cu produced in this reaction is .

Chemistry

2 answers:

lys-0071 [83]3 years ago

5 0

The answer is 4.96.........

RSB [31]3 years ago

4 0

Answer is three, 4.96.

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The act of changing something but not being able to change it back

SCORPION-xisa [38]

I would assume it would be impossible or unlikely

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3 years ago

Which solution when mixed with a drop of bromthymol blue will cause the indicator to change from blue to yellow

Arisa [49]

Hello!

bromothymol blue in aqueous solution gives a yellow color.

<span>I hope I helped you</span>

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3 years ago

If 45.0 mL of ethanol (density =0.789g/mol) initially at 6.0°C mix with 45.0 mL of water (density =1.0 g/mol) initially at 28.0°

Likurg_2 [28]

The final temperature of the mixture : 21.1° C

<h3>Further explanation </h3>

The law of conservation of energy can be applied to heat changes, i.e. the heat received / absorbed is the same as the heat released

Q in(gained) = Q out(lost)

Heat can be calculated using the formula:

Q = mc∆T

Q = heat, J

m = mass, g

c = specific heat, joules / g ° C

∆T = temperature difference, ° C / K

Q ethanol=Q water

mass ethanol=

$\tt mass=\rho\times V\\\\mass=0.789\times 45=35.505~g$

mass water =

$\tt mass=1~g/ml\times 45~ml=45~g$

then the heat transfer :

$\tt 35.505\times 2.42~J/g^oC\times (t-6)=45\times 4.18~J/g^oC\times (28-t)\\\\85.922t-515.533=5266.8-188.1t\\\\274.022t=5782.33\rightarrow t=21.1^oC$

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3 years ago

A balloon is floating around outside your window. The temperature outside is 21 ∘C , and the air pressure is 0.700 atm . Your ne

Andreyy89

Answer:

$V=162L$

Explanation:

Hello,

In this case, we can compute the required volume by using the ideal gas equation as shown below:

$PV=nRT$

Thus, solving for the volume and considering absolute temperature (in Kelvins), we obtain:

$V=\frac{nRT}{P}= \frac{4.70mol*0.082\frac{atm*L}{mol*K}*(21+273)K}{0.700atm} \\\\V=162L$

Best regards.

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4 years ago

WILL GIVE BRAINLIEST. How does Earth's distance from the sun make it advantageous for supporting life?

Goryan [66]

<span>allows for regular periods of sunlight</span>

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4 years ago