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prohojiy [21]
2 years ago
13

Can someone please help me quickly!!!

Chemistry
2 answers:
galina1969 [7]2 years ago
4 0

Answer:

Mercury

Explanation: Under standard conditions mercury is a shiny, heavy, silvery liquid. It is the only metal that is liquid at room temperature.

pantera1 [17]2 years ago
3 0

Answer:

Mercury, Venus, earth and mar, Jupiter, Saturn, urines, Neptune.

Explanation:

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Evgesh-ka [11]
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6 0
3 years ago
The atmosphere is about 21% oxygen. At a pressure of 749 torr, what is the partial pressure of O2?
Kitty [74]

Answer:

157.29 Torr

Explanation:

This question may be solved by the mole fraction.

Mole fraction → Moles of gas / Total moles = Partial pressure of gas / Total pressure

If the atmosphere is about 21% you assume that the mole fraction is 0.21 so:

0.21 = Partial pressure of gas / Total pressure

0.21 = Partial pressure of gas / 749 Torr

Partial pressure of the gas = 749 Torr . 0.21 →  157.29 Torr

3 0
3 years ago
Air tends to move from _____.
konstantin123 [22]
I would say a. at the equator to the poles or maybe c. cold air rising and warm air sinking.
3 0
3 years ago
Read 2 more answers
Caluclate the number of grams of oxygen that must react
bonufazy [111]

Answer : The number of grams of oxygen react must be, 170.4 grams.

Solution : Given,

Mass of C_3H_8 = 46.85 g

Molar mass of C_3H_8 = 44 g/mole

Molar mass of O_2 = 32 g/mole

First we have to calculate the moles of C_3H_8.

\text{ Moles of }C_3H_8=\frac{\text{ Mass of }C_3H_8}{\text{ Molar mass of }C_3H_8}=\frac{46.85g}{44g/mole}=1.065moles

Now we have to calculate the moles of O_2

The balanced chemical reaction is,

C_3H_8+5O_2\rightarrow 3CO_2+4H_2O

From the balanced reaction we conclude that

As, 1 mole of C_3H_8 react with 5 mole of O_2

So, 1.065 moles of C_3H_8 react with 1.065\times 5=5.325 moles of O_2

Now we have to calculate the mass of O_2

\text{ Mass of }O_2=\text{ Moles of }O_2\times \text{ Molar mass of }O_2

\text{ Mass of }O_2=(5.325moles)\times (32g/mole)=170.4g

Therefore, the number of grams of oxygen react must be, 170.4 grams.

8 0
3 years ago
You have 100ml of a 12m solution of HCI, and you need to dilute it to 1.5m for an experiment. How many liters will your new solu
asambeis [7]

Answer:

0.8 liters.

Explanation:

By proportion  the volume of the new solution will be (12/1.5) * 100 ML

= 800 ml = 0.8 liters.

5 0
2 years ago
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