Which of the following is an area targeted by countries to reduce environmental impact?

Chemistry

2 answers:

Ainat [17]3 years ago

8 0

the answer is D on e2020

Doss [256]3 years ago

5 0

Answer:greenhouse gas emissions

Explanation:

Each country targets the minimization of green house gases. Green house gases are those gases that are known to contribute towards global warming or greenhouse effect such as CO2, N2O,and water vapour. This is the rationale behind the move by many countries towards the substitution of fossil fuels by cleaner fuels. Fossil fuels produce carbon IV oxide which is known to lead to global warming. Greenhouse gasses impact the environment negatively by raising the temperature of the earth.

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How many grams of Co3+ are present in 2.34 grams of cobalt(III) nitrite?

Assoli18 [71]

Answer:

$m_{Co^{3+}}=0.563gCo^{3+}$

Explanation:

Hello there!

In this case, since these mole-mass relationships are understood in terms of the moles of the atoms forming the considered compound, we first realize that the chemical formula of the cobalt (III) nitrate is Co(NO₃)₃ whereas there is a 1:1 mole ratio of the cobalt (III) ion (molar mass = 58.93 g/mol) to the entire compound. In such a way, we first compute the moles of the salt (molar mass = 58.93 g/mol) and then apply the aforementioned mole ratio to obtain the grams of the required cation:

$m_{Co^{3+}}=2.34gCo(NO_3)_3*\frac{1molCo(NO_3)_3}{244.95 gCo(NO_3)_3} *\frac{1molCo^{3+}}{1molCo(NO_3)_3} *\frac{58.93gCo^{3+}}{1molCo^{3+}} \\\\m_{Co^{3+}}=0.563gCo^{3+}$