Balance this equation please.

Answers

Answer 1

Answer: 2K + 2H2O = 2KOH + H2

Answer 2

Answer: 2K + 2H2O = 2KOH + H2 Actually Really what That other guy said

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Entropy measures _____.a. disorder b. energy c. heat transferred d. force
46 What occurs at one of the electrodes in both an electrolytic cell and a voltaic ccl1?( I) Oxidation occurs as electrons arc gained at the cathode. (2) Oxidation occurs as electrons are lost at the anode.(3) Reduction occurs as electrons are gained at the anode. (4) Reduction occurs as electrons are lost at the cathode.

Why are alloys useful?

Answers

Answer:

Yes, they are useful.

Explanation:

They allow us to make use of strengths and benefits of a particular element while not being hampered by it's faults.

An experimental procedure requires 10 ml of acid to be dissolved into a beaker of water. An additional 5 ml of acid is added to the solution. Which statement best describes the new solution?

Answers

If we dissolve 10 mL of acid into a beaker of water. The acid will be diluted.
Since the number of moles of acid will not change, we can use this formula:
M1 V1 = M2 V2

Where M is the concentration of the acid in the solution
V1 = 10 mL
and
V2 = Vwater + 10

If we add an additional 5 mL of acid, the new concentration of the acid will be:
M = (M1 (5mL) + M2 (Vwater + 10mL)) / (5mL + Vwater + 10mL)

The concentration of acid in the new solution will increase.

Long story short, C is the answer.

For an experiment, you place 15 g of ice with a temperature of -10 C into a cup and labela. You also place 25 g of ice at the same temperature into another cup and label it
b. Which of the following statements is true?
A) The average kinetic energy of the ice in cup A is less than that in cup
b.
B)The average kinetic energy of the ice in cup A is greater than that cup in
b.
C)The average kinetic energy of the ice cup A is equal to that in cup
b.
D)The average kinetic energies of the ice in cup A and the ice in cup B are not comparable.

Answers

Average kinetic energy is given by the formula:

KE(average) = 3/2*k*T

where k = Boltzmann constant = 1.38*10⁻²³ J/K

T = temperature in Kelvin (K)

Thus, the average KE is dependent only on temperature and independent of mass.

Since the temp in Cup A and B remains the same, the average KE will also be the same.

Ans C)

The correct answer is c. Temperature is the average kinetic energy of a sample so if two samples have the same temperature they will also have the same average kinetic energy. I hope this helps. Let me know if anything is unclear.

10 Which statement correctly describes the location and charge of the electrons in an atom?F The electrons are inside the nucleus and have no charge.
G The electrons are outside the nucleus and have no charge.
H The electrons are inside the nucleus and have a negative charge.
The electrons are outside the nucleus and have a negative charge.

which is correct

Answers

Answer:

D. The electrons are outside the nucleus and have a negative charge.

Explanation:

Electrons are located outside the nucleus while protons and neutrons are located inside the nucleus.

Electrons are negatively charged and attracted to nucleus as the nucleus carry protons that are positively charged and neutrons have no charge.

Electrons are arranged in different energy levels based on the attraction between the positively charged nucleus and negatively charged electron.

Hence, the correct answer is "D. The electrons are outside the nucleus and have a negative charge."

How many molecules are there in 5.0g of C2H5OH?

Answers

About 6.5x10^22 molecules.(5g C2H5OH)x(1 mol C2H5OH/46g C2H5OH)x(6.02x10^23 molecules C2H5OH/1 mol C2H5OH)=(3.01E24)/46=6.5x10^22.Let me know if this helped!

The molar heat of fusion of gold is 12.550 kJ mol–1. At its melting point, how much mass of melted gold must solidify to release 235.0 kJ of energy?