When was Carbon discovered? (The element from the periodic table)

Answers

Answer 1

Answer: Carbon was discovered in 3750 BC

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Atoms A and X are fictional atoms. Suppose that the standard potential for the reduction of X^2+ is +0.51 V, and the standard potential for the reduction of A^2+ is -0.33. Find the standard potential for an electrochemical cell with the cell reaction that follows.

Answers

While the reaction is not shown, based on those atoms and reduction potentials, the only reasonable favorable equation we can form is:

A(2+) + X -> A + X(2+)

The standard reduction potential for the cell is the cathode's reduction potential minus the anode's reduction potential, or 0.51-(-0.33)=0.84.

If 3/5 < x < 67%, which of the following could be the value of x?

Answers

Answer:

2/3, or .66

Explanation:

the answer is. 2/3 .33

What atom is an electrically neutral atom has 47 electrons and 61 neutrons

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That would be Silver (Ag) which has an atomic number of 47 (same as the number of electrons) and a mass number nearing 108 (47 + 61 = 108)

Do x-rays travel slower than infrared

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No, x-rays do not travel slower than infrared radiation or even the opposite. Both are travelling in vacuum therefore they travel at same speed. They differ in the frequency of the electromagnetic waves.

What is the formula equation for the reaction between sulfuric acid and dissolved sodium hydroxide if all products and reactants are in the aqueous or liquid phase?

Answers

The formula equation for the reaction between sulfuric acid and dissolved sodium hydroxide will be the same even if all products and reactants are in the aqueous or in the liquid phase. It is as follows:

H2SO4 + 2NaOH = Na2SO4 + 2H2O

C) H2SO4 + 2NaOH = Na2SO4 + 2H2O

Number of CO2 molecules in 0.0180 mol CO2

Answers

1.8x10^-2 (6.023x10^23) = 10.84x10^21 = 1.08x10^22

1.8x10^2(6.023x10^23)=10.84x10^21
Answer is
1.08x10^22

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