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Sergio [31]
2 years ago
8

Number 7 and 8 Skjsjsjsjskksksksksksksjjsj​

Chemistry
2 answers:
wel2 years ago
8 0

Answer: B. foe both g

Explanation:

noname [10]2 years ago
3 0

Answer:

B

B

Explanation:

the both have the same thing or something

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If you pour water into a hot metal pan, the water will absorb heat energy from the pan. Will the water come to the same temperat
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4 0
2 years ago
The British gold sovereign coin is an alloy of gold and copper having a total mass of 7.988 g, and is 22-karat gold.
azamat

Answer:

(a) m_{gold}=7.322g

(b)

V_{gold}=0.379cm^3

V_{copper}=0.122cm^3

(c) \rho _{coin}=15.94g/cm^3

Explanation:

Hello,

(a) In this case, with the given formula we easily compute the mass of gold contained in the sovereign  as shown below:

m_{gold}=\frac{m_{tota}*karats}{24}=\frac{7.988g*22}{24}=7.322g

(b) Now, by knowing the density of gold and copper, 19.32 and 8.94 g/cm³ respectively, we compute each volume, by also knowing that the rest of the coin contains copper:

V_{gold}=\frac{m_{gold}}{\rho_{gold}} =\frac{7.322g}{19.32g/cm^3}=0.379cm^3

m_{copper}=7.988g-7.322g=1.09g\\V_{copper}=\frac{m_{copper}}{\rho_{copper}}=\frac{1.09g}{8.94g/cm^3}  \\\\V_{copper}=0.122cm^3

(c) Finally, the volume is computed by dividing the total mass over the total volume containing both gold and copper:

\rho _{coin}=\frac{m_{total}}{V_{gold}+V_{copper}}=\frac{7.988 g}{0.379cm^3+0.122cm^3}\\  \\\rho _{coin}=15.94g/cm^3

Best regards.

3 0
3 years ago
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I neeed a bfffff like some one hml
Arturiano [62]

Answer:

Go talk to people more and dont rush things

Explanation:

Youll get one in time

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Listed below are sets of elements.
Anna11 [10]
The correct answer is B) Chlorine, Sulfur, and Silicon

I'm 100% sure this is correct

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How many electrons can occupy the 4p sublevel of a neutral atom of bromine
VMariaS [17]

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6

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every p sublevel holds up to 6 electrons

so the 4p sublevel  must hold up to 6 electonsr

4 0
2 years ago
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