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Vika [28.1K]
3 years ago
15

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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A cube of an unknown metal measures 0.200 cm on one side. The mass of the cube is 52 mg. Which of the following is most likely t
Margarita [4]

Answer:

Option E. Zirconium

Explanation:

From the question given above, the following data were obtained:

Length of side (L) of cube = 0.2 cm

Mass (m) of cube = 52 mg

Name of the unknown metal =?

Next, we shall determine the volume of the cube. This can be obtained as follow:

Length of side (L) of cube = 0.2 cm

Volume (V) of the cube =?

V = L³

V = 0.2³

V = 0.008 cm³

Next, we shall convert 52 mg to g. This can be obtained as follow:

1000 mg = 1 g

Therefore,

52 mg = 52 mg × 1 g / 1000 mg

52 mg = 0.052 g

Thus, 52 mg is equivalent to 0.052 g.

Next, we shall determine the density of the unknown metal. This can be obtained as follow:

Mass = 0.052 g.

Volume = 0.008 cm³

Density =?

Density = mass / volume

Density = 0.052 / 0.008

Density of the unknown metal = 6.5 g/cm³

Comparing the density of the unknown metal i.e 6.5 g/cm³ with those given in table in the above, we can conclude that the unknown metal is zirconium

7 0
3 years ago
Which of the following is non polar covalent bond?
vladimir2022 [97]

Answer:

N-Cl

Explanation:

Look at the chart below. Since N-Cl bond has a electronegativity difference of (3.0-3.0) zero, they are non-polar.

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belka [17]
I'd say he ways about 35 kilograms, but I'm probably wrong, xD

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3 years ago
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Which is a NOT a freshwater source on Earth?
cluponka [151]

Answer:

B the atmosphere it's not on earth and I'm pretty sure  the atmosphere doesn't have water in

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