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3 years ago

A major problem caused by humans is the contamination and depletion of _____ resources. A. solar B. water C. wind

Chemistry

2 answers:

nadezda [96]3 years ago

6 0

Answer: B. Water

Explanation:

Solar, water and wind are the renewable resources. They are abundantly available in nature and are replenishable. Due to human intervention the most affected resource is water. As water is required for various activities by human society. With the use in large scale such a resource is also contaminated by humans due to sewage discharge in water bodies, industrial discharge, disposal of wastes and even the cremation of humans a ritual practice is performed in water bodies. This will likely to deplete the available freshwater for future.

3241004551 [841]3 years ago

4 0

Water is the only one of these that would work by process of elimination.

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How many valence electrons are in N2O? SeCl2? PBr3?

8090 [49]

Here is the answer for the three of them
N20 = 16 e-
SeCl2 =20
PBr3 = 26
Remember that to find the valence electrons in an atom you need to identify what group the element is in. An element in group 1A has 1 valence electron. If the element is in group 2A, then it has two valence electrons.

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3 years ago

These two elements are most likely good conductors of heat and electricity and shiny when solid.

Mama L [17]

Copper and Aluminium..........

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3 years ago

Read 2 more answers

A sample of argon has a volume of 1.2 L at STP. If the temperature is increased to 21 c and the pressure is lowered to 0.80 atm,

Nuetrik [128]

Answer:

The new volume is 1.62 L

Explanation:

Boyle's law says:

"The volume occupied by a given gas mass at constant temperature is inversely proportional to the pressure." It is expressed mathematically as:

Pressure * Volume = constant

o P * V = k

Charles's law is a law that says that when the amount of gas and pressure are kept constant, the ratio between volume and temperature will always have the same value:

$\frac{V}{T}=k$

Gay-Lussac's law indicates that when there is a constant volume, as the temperature increases, the gas pressure increases. And when the temperature is decreased, the gas pressure decreases. So this law indicates that the quotient between pressure and temperature is constant.

Gay-Lussac's law can be expressed mathematically as follows:

$\frac{P}{T}=k$

Combined law equation is the combination of three gas laws called Boyle's, Charlie's and Gay-Lusac's law.

$\frac{P*V}{T}=k$

Having an initial state 1 and a final state 2 it is possible to say that:

$\frac{P1*V1}{T1} =\frac{P2*V2}{T2}$

Standard temperature and pressure (STP) indicate pressure conditions P = 1 atm and temperature T = 0 ° C = 273 ° K. Then:

P1= 1 atm
V1= 1.2 L
T1= 273 °K
P2= 0.80 atm
V2= ?
T2= 21°C= 294 °K

Replacing:

$\frac{1 atm* 1.2 L}{273K} =\frac{0.8 atm*V2}{294K}$

Solving:

$V2=\frac{1 atm*1.2 L}{273 K} *\frac{294 K}{0.8 atm}$

V2= 1.62 L

The new volume is 1.62 L

8 0

3 years ago

Which metal is more active than tin, but less active than zinc

VikaD [51]

Answer:

Iron (Fe)

Explanation:

The reactivity series shows a series of metals reactivity from lowest to highest. Based on the arrangement of metals in the reactivity series, iron is placed above tin and below zinc, this means that iron is more reactive than tin but less reactive than zinc. This means that iron would displace tin ions in a solution whereas zinc would displace iron ions in a solution.

The reactivity of metals is due to the stability of metals in their electron configurations as atoms and as ions.

8 0

3 years ago

\al(s) + 3agno3(aq) → al(no3)3(aq) + 3ag(s) this equation represents which type of chemical reaction?

Savatey [412]

Al(s) + 2AgNO3(aq) = Al(NO3)3(aq) + 3 Ag (s)

is a single replacement reaction

A single replacement reaction is a type of chemical reaction were element react with a compound and the element take place of another element in that compound. In the reaction above Aluminium (Al) take the place of silver (Ag) from it compound.that is AgNO3. single replacement reaction is possible because aluminium is in high in reactivity series as compared to silver.

3 0

3 years ago