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SashulF [63]
3 years ago
11

Choose one natural resource that is nonrenewable. In three to five sentences, describe two impacts that come from obtaining this

resource and how these impacts have been affected by human population growth.
plz help
Chemistry
1 answer:
Fiesta28 [93]3 years ago
8 0
Oil is a natural non renewable resource and the impacts are the fact that we rely on it heavily and we are running out of a valuable resource not only that we are destroying the earth and its atmosphere and surface in order to harvest it the can affect the human population growth by not having this resource for future generations making them try abs find some other source to rely on
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The shielding of electrons gives rise to an effective nuclear charge, Z_{\rm eff}, which explains why boron is larger than oxyge
Eva8 [605]

Answer:

B. +3 and +6

Explanation:

The values of the Z_{eff} is estimated by subtracting the core electrons from the atomic number of the element.

Oxygen has an atomic number of 8, 6 valence electrons, and 2 core electrons. Therefore the value of Z_{eff} = 8-2 = +6

Boron has an atomic number of 5, 3 valence electrons and 2 core electrons. Therefore, the value of Z_{eff} = 5-2 = +3

4 0
4 years ago
A chemist measures the energy change
Flauer [41]

<u>Answer:</u>

<u>For (1):</u> The correct option is (a)

<u>For (2): </u>The correct option is (a) and 333.6 kJ of heat will be absorbed when 70.9 g of ammonia reacts.

<u>Explanation:</u>

There are 2 types of reactions that are classified based on enthalpy change:

<u>Endothermic reactions:</u> These are the reactions where heat is absorbed by the reaction. The change in enthalpy of the reaction, \Delta H_{rxn} is positive for these reactions.

<u>Exothermic reactions:</u> These are the reactions where heat is released by the reaction. The change in enthalpy of the reaction, \Delta H_{rxn} is negative for these reactions.

  • <u>For (1):</u>

For the given chemical reaction:

2NH_3(g)\rightarrow N_2(g)+3H_2(g);Delta H=160kJ

As the change in enthalpy or heat of the reaction is positive. Thus, the reaction is an endothermic reaction because heat is absorbed by the reaction.

  • <u>For (2):</u>

When ammonia reacts, some amount of heat will be absorbed by the reaction. Thus, we can say the heat will be absorbed.

The number of moles is calculated by using the equation:

\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}} ......(1)

Given mass of ammonia = 70.9 g

Molar mass of ammonia = 17 g/mol

Using equation 1:

\text{Moles of ammonia}=\frac{70.9g}{17g/mol}=4.17mol

By stoichiometry of the reaction:

If 2 mole of ammonia reacts, the heat absorbed is 160 kJ

So, if 4.17 moles of ammonia reacts, the heat absorbed will be = \frac{160kJ}{2mol}\times 4.17mol=333.6kJ

Hence, 333.6 kJ of heat will be absorbed when 70.9 g of ammonia reacts

8 0
3 years ago
A sample of 5.00 mol of gas in a 10.00 L container is at 45.0 °C. What is the pressure of the gas?
katrin2010 [14]

Answer:

The pressure of the gas is 13, 04 atm.

Explanation:

We use deal gas formula. First, we convert the unit of temperature in Celsius into Kelvin. We use the constant R= 0,082 l atm /K mol.Then, we solve P (pressure).

0°C=273 K   45°C= 273 + 45= 318 K

PV=nRT   -----> P= (nRT)/V

P= (5 mol x 0,082 l atm /K mol x 318 K)/ 10 L

<em>P= 13,038 atm</em>

6 0
4 years ago
Did the evidence produced by Thomson's investigations with the cathode ray tube
Elanso [62]

Answer:

maybe maybe maybe maybe

5 0
3 years ago
Write balanced complete ionic equation for hcl(aq)+lioh(aq)→h2o(l)+licl(aq)
olga2289 [7]
<span>H and Li have a +1 charge. Cl and OH have a -1 charge. When written out it should look like this: H(+1) + Cl(-1) + Li(+1) + OH(-1) --> H2O + Li(+1) + Cl(-1) if you wanted the net ionic equation it would be: H(+1) + OH(-1) --> H2O</span>
4 0
4 years ago
Read 2 more answers
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