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ruslelena [56]
3 years ago
10

What is cyclic brane theory? i need a definition.

Chemistry
2 answers:
dezoksy [38]3 years ago
8 0

Explanation:

The cyclic universe theory is a model of cosmic evolution according to which the universe undergoes endless waves of expansion and cooling. It's any of several cosmotoligal models in which the universe follows infinate, indenfinate, self-sustaining practices.

I hope my answer helped you! Have a great day!

A rating and a Thanks would also be great!

fomenos3 years ago
3 0

Answer:

the cyclic theory is model of comic evolution according to which the univers undergoes endless cycle of expansion and cooling each beging with a bigban and ending in big crunch

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Which ions are isoelectronic with Krypton?
Tresset [83]

Answer:

Bromine

Explanation:

Bromine with an atomic number of 35 acquires one electron to attain 36 electrons. This makes it isoelectronic with krypton.

5 0
3 years ago
By weight atmospheric air is approximately 23.15% oxygen and 76.85% nitrogen. What is the partial pressure of oxygen in the air
inna [77]

Answer:

Partial pressure of oxygen = 23.38 kpa (Approx)

Explanation:

Given:

Amount of oxygen = 23.15%

Amount of nitrogen = 76.85%

Pressure (missing) = 101 kpa

Find:

Partial pressure of oxygen

Computation:

Partial pressure of oxygen = [Amount of oxygen x Pressure]/100

Partial pressure of oxygen = [23.15% x 101]/100

Partial pressure of oxygen = 23.38 kpa (Approx)

5 0
3 years ago
the volume of a gas is 450mL when it’s pressure is 1.00 atm. if the temperature of the gas does not change, what is the pressure
Bezzdna [24]

Answer:i DON NOT KNOW SORY

Explanation:

5 0
4 years ago
Read 2 more answers
Citric acid (H3 C6 H5 O7) is a product of the fermentation of sucrose (C12 H22 O11) in air.
stiks02 [169]

Answer:

960.6175

Explanation:

The balanced equation shows that for every mole of sucrose used, 2 moles of  citric acid are produced.

So 2.5 moles of C12H22O11 will produce 2*2.5 moles of Citric acid.

So 2.5 moles of C23H22O11 will produce 5 moles of Citric Acid.

The next step is to figure out the molar mass of Citric Acid.

There are

Hydrogen: H3 + H5 moles of hydrogen in 1 mole of Citric Acid = 8 mol H

Carbon: 1 mol of Citric Acid has 6 moles of Carbon in it             = 6 mol C

Oxygen: 1 mol of Citric Acid has 7 moles of Oxygen it it              =7 mol O

Hydrogen has  a mass of 1  so Citric Acid has 1 * 8 grams H          8

Carbon has a mass of 12 so Citric Acid has 12 * 6 grams C           72

Oxygen has a mass of 16 so Citric Acid has <u>16 * 7 grams O          112</u>

Total grams for 1 mol Citric Acid                                                     192    

The official published mass of Citric Acid is 192.1235 so because I used rounded numbers I'm a little off. It is important for any chemistry student student to know  where the 192.1235 came from rather than exactly why I'm a little out. Every periodic table lists different masses for each element. If you want a better number, you will have to consult your own periodic table.

1 mol of Citric Acid = 192 grams

5 mols of Citric Acid = x

Cross multiply

1 * x = 5 * 192

x = 960 grams.

If you want to use the published amount then the answer will be 5 * 192.1235 = 960.6175

       

8 0
3 years ago
The solubility of a solute and solvent at a given temperature is 30.65 g/100 mL.
Alisiya [41]

Answer:

613.0 g

Explanation:

2 L = 2000 mL

(30.65 g/100 mL)*2000 mL = 613.0 g

3 0
3 years ago
Read 2 more answers
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