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sergiy2304 [10]
3 years ago
15

Why would the federal government and city government find it necessary regulate water standard?

Chemistry
1 answer:
Helga [31]3 years ago
4 0
They do this so that when you drink it or use it the contaminates that used to be in it dont make you sick

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Mercury is a liquid metal having a density of 13.6 gml what is the volume of 1.00 lb of mercury metal
tresset_1 [31]

The volume of 1.00 lb of mercury metal : 33.352 ml

<h3>Further explanation  </h3>

Density is a quantity derived from the mass and volume  

Density is the ratio of mass per unit volume  

Density formula:  

\large {\boxed {\bold {\rho ~ = ~ \frac {m} {V}}}}

ρ = density  

m = mass  

v = volume  

Density of metal(mercury) = 13.6 g/ml

mass of mercury : 1 lb = 453,592 g

So the volume :

\tt V=\dfrac{453,592~g}{13.6~g/ml}\\\\V=33.352~ml

7 0
3 years ago
On the cooling curve below, between points Dand Ethe substance is changing from
Irina-Kira [14]
Gas to solid ( a ) is correct i think
6 0
3 years ago
What is<br>mole used for​
nordsb [41]

Answer:

What is mole used for?

Explanation:

The mole is widely used in chemistry as a convenient way to express amounts of reactants and products of chemical reactions.

SI base units: Base unit (Dimensionless)

Symbol: mol  

Unit of: Amount of substance

Unit system: SI base unit

8 0
3 years ago
for the reactants represented by the equation 2H2 + O2 &gt; 2H2O, how many grams of water are produced from 376.97 mol of hydrog
Hunter-Best [27]

Answer:

6792.1 g

Explanation:

Dimensional analysis:

376.92 mol H2 * (2 mol h2o / 2 mol h2) * (18.02g h2o / 1 mol h2o)

6792.1 g

8 0
3 years ago
Read 2 more answers
Melting is considered a(n) ___ change because energy is gained by the substance as it changes state
Burka [1]
Melting is a physical change
4 0
3 years ago
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