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MArishka [77]
3 years ago
8

How did scientists solve the nitrogen problem?

Chemistry
1 answer:
taurus [48]3 years ago
3 0

Unfortunately, we have not fully solved the 'nitrogen problem'. To do this, we must halve the amount of nitrogen we dump into the environment by mid-century or our ecosystems will face epidemics of toxic tides, lifeless rivers, and dead oceans. And that to do that will require, among other things, almost doubling the efficiency of nitrogen use on the world’s farms.

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Perspex and polythene are two examples of what?​
erma4kov [3.2K]
Perspex and polythene are good examples of insulators.
3 0
3 years ago
THIS iS A Ratio Problem
Arte-miy333 [17]

Answer:

30 moles of CO₂

Explanation:

balanced equation ,

CS₂+3O₂ → CO₂+2SO₂

From equation, 3 moles of O₂ are needed to make 1 mol of CO₂.

This means to produce 1 mol of CO₂, we need 3 moles of O₂, then how many moles of CO₂ will be produced from 90 moles of O₂ ?

Use unitary method to solve such problems,

Number of moles of CO₂ that will be produced:

= \frac{90 \times 1}{3}

=\frac{90}{3}

= 30 moles of CO₂

4 0
4 years ago
Given the following proposed mechanism, predict the rate law for the rate-determining step.
PilotLPTM [1.2K]

Answer:

D) Rate = K [NO2][Cl2]

Explanation:

2 NO2 + Cl2 → 2 NO2Cl (overall reaction)

NO2 + Cl2 → NO2Cl + Cl (slow)

NO2 + Cl → NO2Cl (fast)

The rate-determining step is the slowest step in a reaction mechanism. Because it is the slowest, it determines the rate of the overall reaction.

Rate of reaction is typically given as;

Rate = K [Reactants]

In the slow step i the reaction mechanism, the reactants are; NO2 and Cl2. Since both are not intermediates, there is no need for further working out.

Rate = K [NO2][Cl2]

5 0
3 years ago
An atom is determined to contain 12 protons, 10 electrons, and 12 neutrons. What are the mass number and charge of this atom or
arlik [135]
The protons are equivalent to the atomic number, so we can determine that the element being expressed here is Magnesium. If you are ever stuck on what element you are finding your information from, just remember that the number of protons is the exact same as the atomic number in ANY situation :)

The charge of magensium is +2, with an atomic mass of 24. So A would be your answer :)
7 0
4 years ago
A strontium hydroxide solution is prepared by dissolving 21.78 g of strontium hydroxide in water to make 75.00 mL of solution. W
Ludmilka [50]
Chemical reaction: Sr(OH)₂ + 2HNO₃ → Sr(NO₃)₂ + 2H₂O.
part A) m(Sr(OH)₂) = 21,78 g.
n(Sr(OH)₂) = m(Sr(OH)₂) ÷ M(Sr(OH)₂).
n(Sr(OH)₂) = 21,78 g ÷ 87,62 g/mol.
n(Sr(OH)₂) = 0,248 mol.
c(Sr(OH)₂) = n(Sr(OH)₂) ÷ V(Sr(OH)₂).
c(Sr(OH)₂) = 0,248 mol ÷ 0,075 L.
c(Sr(OH)₂) = 3,3 mol/L.
part B) V(Sr(OH)₂) = 34,21 mL = 0,03421 L.
n(Sr(OH)₂) = 0,03421 L · 3,3 mol/L = 0,112 mol.
From chemical reaction: n(Sr(OH)₂) : n(HNO₃) = 1 : 2.
n(HNO₃) = 0,225 mol.
V(HNO₃) = 0,225 mol ÷ 0,25 mol/L.
V(HNO₃) = 0,9 L = 900 ml.

7 0
3 years ago
Read 2 more answers
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