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2 years ago

Help please! in the photo!!!

Chemistry

1 answer:

nata0808 [166]2 years ago

4 0

Answer:

1. The first three Hydrogen atoms have the same number of protons

2. The first three Hydrogen atoms are also isotopes of each other

3. The third Hydrogen atom and the first Helium atom have the same mass number

4. The second Carbon atom and the first Oxygen atom both have the same number of neutrons

Explanation:

1. The number on the top left tells us the mass number while the bottom left number tells us the atomic number. The atomic number is equal to the number of protons.

2. An isotope is when there is an equal amount of protons, but a different number of neutrons. Neutrons can be calculated by taking the mass number and subtracting the atomic number.

3. As said before, the mass number is the number on the top left of each symbol. Look for atoms with the same mass number.

4. Neutrons can be calculated by taking the mass number and subtracting the atomic number. The second Carbon atom and the first Oxygen atom both have six neutrons. 14 - 6 = 8 neutrons for the second Carbon and 16 - 8 = 8 neutrons for the first Oxygen atom.

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Answer:

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2 years ago

Calculate the concentration of CO2 in water at 25 degrees Celsius when the pressure of CO2 over the solution is 4.5 atm. At 25 d

OLEGan [10]

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Explanation :

Using Henry's law :

$C_{CO_2}=k_H\times p_{CO_2}$

where,

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$p_{CO_2}$ = partial pressure of $CO_2$ = 4.5 atm

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Now put all the given values in the above formula, we get:

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Thus, the concentration of $CO_2$ is, 0.12 M

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2 years ago

What is the name for C2I3

Sidana [21]

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Explanation:

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The naming of covalent compound is given by:

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2 years ago

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2 years ago

Which ion has the smallest radius? (1) O2- (2) S2- (3) Se2- (4) Te2-

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Answer:

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Explanation:

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3 years ago

Read 2 more answers

Help please! in the photo!!! ​

Help please! in the photo!!!