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o-na [289]
3 years ago
10

Which planet contains high levels of carbon dioxide in its atmosphere resulting in a runaway greenhouse effect

Chemistry
1 answer:
Amiraneli [1.4K]3 years ago
4 0
It would be either mars or venus
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A first-order reaction has a half-life of 20.0 minutes. Starting with 1.00 x 10^20 molecules
blsea [12.9K]

Answer:

E

Explanation:

100 minutes is   5 half lives  ( 100 min/20 min/half life)

         = (1/2 )^5

1 x 10^20    *    (1/2)^5 =   3.125 x10^18   molecules

7 0
2 years ago
How many moles of \ce{Fe2O3}FeX 2 ​ OX 3 ​ will be produced from 27.0 \text{ g}27.0 g27, point, 0, start text, space, g, end tex
ira [324]

Answer : The number of moles of Fe_2O_3  produced will be, 0.241 moles.

Solution : Given,

Mass of Fe = 27.0 g

Molar mass of Fe = 56 g/mole

First we have to calculate the moles of Fe.

\text{ Moles of }Fe=\frac{\text{ Mass of }Fe}{\text{ Molar mass of }Fe}=\frac{27.0g}{56g/mole}=0.482moles

Now we have to calculate the moles of Fe_2O_3

The balanced chemical reaction is,

4Fe+3O_2\rightarrow 2Fe_2O_3

From the reaction, we conclude that

As, 4 mole of Fe react to give 2 mole of Fe_2O_3

So, 0.482 moles of Fe react to give \frac{0.482}{4}\times 2=0.241 moles of Fe_2O_3

Thus, the number of moles of Fe_2O_3  produced will be, 0.241 moles.

6 0
3 years ago
What is the boiling point of water?​
ExtremeBDS [4]

Answer:

212°F , 100°C , 373.15°K

They are all the same, in different units.

6 0
3 years ago
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describe some acidic oxides that can be prepared by the thermal decomposition of nitrates and carbonates​
ale4655 [162]
The oxidation is the best thing
7 0
3 years ago
The density of tin is 7.31 g/cm? What is the mass of the sample pictured below?
Oduvanchick [21]

Answer:

8.1 g/cm3.

Explanation:

5 0
3 years ago
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