All categories

4 years ago

How has overpopulation changed the rule about recycling and use of resources

Chemistry

2 answers:

Lynna [10]4 years ago

8 0

Answer:

Explanation:

Overpopulation changed the rule about the recycling and use of resources because we have limited resources on our planet. For fulfillment of the needs of all the population, we are paying attention toward recycling and limiting the use of fresh resources. Now a days we are heading towards sustainable development. In sustainable development we use our resources without exploiting them so that our future generation would also use them.

snow_tiger [21]4 years ago

3 0

7tg$(nskvkvkdk f kfjjcjgnnfnfngbdmndndnkxjc

You might be interested in

One characteristic of a lagoon is often:

Alik [6]

One characteristic of a lagoon is often: concentrated salt.

4 0

4 years ago

Read 2 more answers

Container A (with volume 1.23 L) contains a gas under 3.24 atm of pressure. Container B (with volume

kolbaska11 [484]

Now that a lot of pressure

8 0

3 years ago

Which layer of the earth is the coolest in temperature?

PilotLPTM [1.2K]

Answer:

B) Crust

Explanation:

It's the farthest layer from the core listed.

5 0

3 years ago

DUE TODAY EXTREMELY IMPORTANT PLEASE PLEASE PLEASE HELP ME ASAPPPPPPPP CHEMISTRY!!!!!!!!!!!!!!!!!!! I WOULD APPRECIATE IT ALOT T

musickatia [10]

Answer:

Here's what I get

Explanation:

3. Molar concentration by formula.

$\begin{array}{rcl}M_{\text{a}}V_{a} & = & M_{\text{b}}V_{b}\\M_{a} \times \text{0.025 00 L} & = & \text{0.3840 mol/L} \times \text{0.034 52 L}\\0.025 00M_{a}\text{ L} & = & \text{0.013 26 mol}\\M_{a}&= &\dfrac{\text{0.013 26 mol}}{\text{0.025 00 L}}\\\\& = &\textbf{0.5302 mol/L}\end{array}$

(i) Comparison of molar concentrations

The formula gives a calculated value of 0.5302 mol·L⁻¹.

Dimensional analysis gives a calculated value of 0.1767 mol·L⁻¹.

The first value is three times the second.

It is wrong because the formula assumes that the acid supplies just enough moles of H⁺ to neutralize the OH⁻ from the NaOH.

Instead, I mol of H₃PO₄ provides 3 mol of H⁺, so your calculated concentration is three times the true value.

(ii) When is the formula acceptable?

The formula is acceptable only when the molar ratio of acid to base is 1:1.

Examples are

HCl + NaOH ⟶ NaCl + H₂O

H₂SO₄ + Ca(OH)₂ ⟶ CaSO₄ + 2H₂O

H₃PO₄ + Al(OH)₃ ⟶ AlPO₄ + 3H₂O

8 0

3 years ago

Gallium has two naturally occurring isotopes with the following masses and natural abundances: Isotope Mass ( amu ) Abundance (%

ICE Princess25 [194]

The formula for determination of atomic mass given the mass of isotopes and relative abundance is:

Ar = ∑(mass * abundance) / 100
Ar = (68.92558 * 60.108 + 70.92470 * 39.892) / 100
Ar = 69.72306

The atomic mass of gallium is 69.72306 amu

4 0

3 years ago