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Virty [35]
3 years ago
15

Can someone help me with my chemistry on my page/account?

Chemistry
1 answer:
lesantik [10]3 years ago
7 0

Answer:

Yes

Explanation:

Text me on here

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Which of the following choices are types of energy? (Select all that apply) A.kinetic energy B.physical energy C.thermal energy
Aleksandr-060686 [28]

Answer:

kinetic, thermal and chemical not physical

7 0
4 years ago
Lithium carbonate, li2co3, contains 18.8 % lithium and is used in the treatment of mental illnesses such as bipolar disorder. wh
Rama09 [41]

Assuming that the 18.8% composition is based on mass, therefore the mass of Lithium would simply be the product of the fractional composition and the total dose. That is:

18.8 % = 0.188

mass Lithium = 0.188 * 1.00 g = 0.188 g

 

Answer:

<span>0.188 g</span>

7 0
3 years ago
Archer is a soil scientist and needs to examine a bacteria sample. He wants to be able to change his magnification with differen
koban [17]

Answer:

C. Dissecting microscope

Explanation:

It is trying to see the surface

3 0
3 years ago
A gold nugget has a volume of 20.0 cm3 and its density is 19.3 g/cm3. What is the mass of the gold nugget?
Luba_88 [7]
Volume = 20.0 cm³

density = 19.3 g/cm³

Therefore:

mass = density * volume

mass = 19.3 * 20.0

mass = 386 g
3 0
3 years ago
The mole fraction of NaCl in an aqueous solution is 0.132. What is the weight/weight percent of NaCl in this solution?
Marrrta [24]

Answer:

\% w/w=33.1\%

Explanation:

Hello,

In this case, since the solution is formed by sodium chloride and water, we understand that for one mole of solution, we have 0.132 moles of sodium chloride and 0.868 moles of water, therefore, by using their molar masses we can compute their masses in the solution:

m_{NaCl}=0.132molNaCl*\frac{58.44gNaCl}{1molNaCl}=7.714gNaCl\\ \\m_{H_2O}=0.868molH_2O*\frac{18gH_2O}{1molH_2O}=15.624gH_2O

Thereby, we can compute the weight/weight percent as follows:

\% w/w=\frac{m_{NaCl}}{m_{H_2O}+m_{NaCl}}*100\%

So we use the previously computed masses:

\% w/w=\frac{7.714g}{7.714g+15.624g}*100\%  \\\\\% w/w=33.1\%

Best regards.

4 0
4 years ago
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