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3 years ago

Each of the models shown represents a magnesium atom. Which models show the same isotope of magnesium? P, Q, and R

Chemistry

2 answers:

goblinko [34]3 years ago

7 0

Answer:

P, Q, and R

Explanation:

I just did this on my final

slega [8]3 years ago

5 0

Answer:

P and Q

Q and R

Explanation:

To begin, we must bear in mind the meaning of isotope.

Isotopes are atoms having the same atomic number (i.e proton) but different mass number due to the difference in the neutron number present in the atoms involved.

Thus, we shall write out the number of protons, neutrons and electrons present in the model given above. This is given:

Model P:

Proton = 12

Neutron = 13

Electron = 13

Model Q:

Proton = 12

Neutron = 12

Electron = 13

Model R:

Proton = 12

Neutron = 13

Electron = 12

From the above data, we can say that:

1. P and Q are isotope since they have different Neutron number.

2. P and R are not isotope since they have the same Neutron number.

3. Q and R are isotope since they have different Neutron number.

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Alexxandr [17]

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1) Finding
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4 years ago

Given the reaction: solid sodium reacts with chlorine gas to form solid sodium chloride How many moles of the product result fro

lyudmila [28]

Answer:

number of moles of NaCl produce = 12 mol

Explanation:

Firstly, we need to write the chemical equation of the reaction and balance it .

Na(s) + Cl2(g) → NaCl(s)

The balanced equation is as follows:

2Na(s) + Cl2(g) → 2NaCl(s)

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6 mole of chlorine gas will produce ? mole of sodium chloride

cross multiply

number of moles of NaCl produce = 6 × 2

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3 0

4 years ago

Calculate the reaction quotient Qp for the following redox reaction: 14H+ + Cr2O72- + 6Cl- ----> 2Cr3+ + 3Cl2 + 7H2O The reac

stich3 [128]

Answer:

Value of $Q_{p}$ for the given redox reaction is $1.0\times 10^{-8}$

Explanation:

Redox reaction with states of species:

$14H^{+}(aq.)+Cr_{2}O_{7}^{2-}(aq.)+6Cl^{-}(aq.)\rightarrow 2Cr^{3+}(aq.)+3Cl_{2}(g)+7H_{2}O(l)$

Reaction quotient for this redox reaction:

$Q_{p}=\frac{[Cr^{3+}]^{2}.P_{Cl_{2}}^{3}}{[H^{+}]^{14}.[Cr_{2}O_{7}^{2-}].[Cl^{-}]^{6}}$

Species inside third braket represent concentration in molarity, P represent pressure in atm and concentration of $H_{2}O$ is taken as 1 due to the fact that $H_{2}O$ is a pure liquid.