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Anna71 [15]
4 years ago
7

If Element X has 85 protons, how many electrons does it have

Chemistry
2 answers:
BartSMP [9]4 years ago
7 0
It has 85 electrons, because an element always has the same number of electrons and protons
melamori03 [73]4 years ago
5 0
If element X has 85 protons, then it has 85 electrons. 
No matter what element it is, there will ALWAYS be the same amount of protons as there are electrons. 

By the way, thanks for asking this question. I just learned this yesterday, so it gave me a way to show what I learned. 
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In which direction does the reaction proceed after heating to 2000 °c?
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6 0
3 years ago
Nitrogen:0.781 oxygen:0.209 argon: 0.010 (Mole fraction)
horrorfan [7]

Answer:

The partial pressure of nitrogen is 597.5 torr

Explanation:

Step 1: Data given

Mol fraction of N = 0.781

Mol fraction of O = 0.209

Mol fraction Ar = 0.010

Atmospheric pressure = 765.0 torr

The partial pressure is given by  Pi = Xi * Pt

⇒ χ i  =  the mole fraction of gas  i  in the mixture

⇒ P total  = the total pressure of the mixture

Step 2: Calculate the partial pressure of nitrogen

P(N) = mol fraction of N * atmospheric pressure

P(N) = 0.781 * 765.0 torr = 597.5 torr

The partial pressure of nitrogen is 597.5 torr

8 0
4 years ago
Plate movement is thought to be the result of what ​
Zielflug [23.3K]

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Hope this helps

7 0
3 years ago
Select the correct answer.
ser-zykov [4K]

Answer:

Correct option is B. It shows the ratio of elements in the compound.

Explanation:

Empirical formula is the simplest form of the chemical formula. It shows the simplest ratio of atoms in compounds. It is determined by %age of each element.

3 0
3 years ago
Hotosynthesis can be represented by 6CO2(g)+6H2O(l)⇌C6H12O6(s)+6O2(g) Which of the following will be false when the photosynthes
antoniya [11.8K]

Answer: Option (b) and (d) are correct.

Explanation:

An equilibrium reaction is defined as the reaction in which rate of forward reaction equals rate of backward reaction.

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Hence, the statement rate of formation of O_{2} is equal to the rate of formation of CO_{2} is true.

  • Concentration of oxygen may remain constant but it will not decrease. Hence, the statement concentration of O_{2} will begin decreasing, is false.
  • As both oxygen and carbon dioxide are present in an equilibrium reaction, So, their concentration will not change.

        Hence, the statement concentrations of CO_{2} and O_{2} will not change, is true.

  • Concentration of carbon dioxide and oxygen will also depend on the limiting reagent. So, it is not necessary that the concentrations of CO_{2} and O_{2} will be equal.

Some amount of carbon dioxide might escape out into the air.

Hence, the statement concentrations of CO_{2} and O_{2} will be equal, is false.

3 0
3 years ago
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