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miskamm [114]
3 years ago
11

How do I get fresh drinking water?

Chemistry
1 answer:
V125BC [204]3 years ago
4 0
For tapfrom a fresh spring
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How many moles are in 400 ml of hydrogen
Nezavi [6.7K]

Answer:

403.176

Explanation:

I hope that the right answer.

8 0
4 years ago
What layer of the skin contains blood vessels, nerves and hair follicles?
LiRa [457]

Answer:

The answer to your question is Dermis

Explanation:

Below the epidermis is the dermis. This is where our blood vessels, nerve endings, sweat glands, and hair follicles are.

7 0
3 years ago
Derive an expression for the molar mass of a gas starting with its density?
notka56 [123]

Answer:

The relationships between molar mass and density for a monoatomic gas can be easy.  

The Ideal Gas Law, PV = nRT can be arranged so that n moles equals the mass/molar mass of the gas to become,

PV =  

M

mRT

​  

 

where m is the mass and M is the molar mass.

M =  

PV

mRT

​  

, if you hold the temperature of the gas constant the equation reduces to the Boyle's law or  

PV

m

​  

 

The mass will be constant assuming the container is closed and so the gas cannot be escaped so, PV will be constant.  

D =  

V

m

​  

 and M =  

PV

mRT

​  

 

M =  

P

DRT

​  

 

The higher the density of the gas the higher the molar mass and vice versa.

Explanation:

6 0
3 years ago
cross contamination can it be caused by carrying either drinking glasses by the rims,a plate by its underside surface, utensils
harkovskaia [24]

Cross contamination can be caused by CARRYING DRINKING GLASSES BY THE RIMS.

Cross contamination refers to the transfer of harmful microbes to foods from various sources. The rim of a drinking glass is where you put your mouth when you are drinking from a glass cup. If one is carrying a drinking glass by the rim, one can easily transfer the dirty in one's hand to the glass and this will be ingested by person who use the cup. Drinking glasses should be carried by holding their bases.

5 0
3 years ago
Read 2 more answers
If there are 0.064g of theobromine in a 43g chocolate bar, how many moles of theobromine are there?
Sever21 [200]

Answer: 3.5\times 10^{-4}

Explanation:

To calculate the moles, we use the equation:

\text{Number of moles}=\frac{\text{Given mass}}{\text {Molar mass}}

Given mass of theobromine (C_7H_8N_4O_2) = 0.064 g

Molar mass of theobromine (C_7H_8N_4O_2)=12\times 7+1\times 8+14\times 4+16\times 2=180 g

\text{Number of moles}=\frac{0.064g}{180g/mol}=3.5\times 10^{-4}moles

5 0
3 years ago
Read 2 more answers
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