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3 years ago

Please help with 14-16 Thank you!

Chemistry

1 answer:

Natalka [10]3 years ago

4 0

I don't know about 14, but 15 is (4), because a liquid draws in heat to turn into a gas. 16 is (2), because to turn into a cold solid, something has to release heat.

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Decay chains exist because

Paraphin [41]

It occurs in a series of sequential reactions until a stable nucleus is reached because Nuclear decay occurs when the nucleus of an atom is unstable and spontaneously emits energy in the form of radiation.

4 0

3 years ago

find the activity coefficient of h , in a solution containing 0.010 m hcl plus 0.040 kclo4. what is the ph of the solution?

Lisa [10]

The activity coefficient of h is 0.05

The ph of the solution is 2.08

To find the activity coefficient, apply the concept of ionic equilibrium

h( activity coefficient)= 1/2CZ²

C is the concentration of species

Z is the charge on individual species

h= 1/2( 0.01 x1²+ 0.04x (-1)²+0.01 x1²+0.04x (-1)²)

h= 0.05

For the pH of the solution, apply the formula

pH= -log( H⁺x0.83)

pH = - log(0.01x0.83)

= 2.08

To learn more about the pH of the solution, visit brainly.com/question/26767292

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1 year ago

Si 72g de magnesio se combinan exactamente con 48g de oxígeno para formar óxido de magnesio ¿cuantos gramos de óxido de habrán f

Stella [2.4K]

Explanation: 40Gram

7 0

3 years ago

At certain times during the process, the temperature increased. During these times, the heat that was absorbed took the form of

Ann [662]

Answer: kinetic, move faster, potential, change form

Explanation:

5 0

3 years ago

An atom of 125Sn has a mass of 124.907785 amu. Calculate the binding energy in MeV per atom. Use the masses: mass of 1H atom = 1

Ksenya-84 [330]

Answer:

1.06×10³ MeV/atom

Explanation:

Atomic number : It is defined as the number of electrons or number of protons present in a neutral atom.

Also, atomic number of Sn = 5 0

Thus, the number of protons = 50

Mass number is the number of the entities present in the nucleus which is the equal to the sum of the number of protons and electrons.

Mass number = Number of protons + Number of neutrons

125 = 50 + Number of neutrons

Number of neutrons = 75

Mass of neutron = 1.008665 amu

Mass of proton = 1.007825 amu

Calculated mass = Number of protons*Mass of proton + Number of neutrons*Mass of neutron

Thus,

Calculated mass = (50*1.007825 + 75*1.008665) amu = 126.041125 amu

Given mass = 124.907785 amu

Mass defect = Δm = |126.041125 - 124.907785| amu = 1.13334 amu

The conversion of amu to MeV is shown below as:-

1 amu = 931.5 MeV

So, Energy = 1.13334*931.5 MeV/atom = 1.06×10³ MeV/atom

3 0

3 years ago