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gulaghasi [49]
2 years ago
12

Why is it impossible to have an undiscovered element that would fit between sodium and magnesuim

Chemistry
1 answer:
Stolb23 [73]2 years ago
4 0

Answer:

Sodium has 11 protons and Magnesium has 12. The way that the periodic table is set up doesn't allow for any elements to be in between. The element would have to have 11.5 protons, which is impossible

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What is the hydrogen ion concentration of a solution with a pH 5? *
nekit [7.7K]

Answer:

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Explanation:

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I need help with my homework.Calculate the number of formula units in: 41.5 grams CaBr2
lana66690 [7]

Answer:

\text{ }1.25\times10^{23}\text{ formula units}

Explanation:

Here, we want to calculate the number of formula units in the given molecule

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To get the number of moles, we have to divide the mass given by the molar mass

The molar mass is the mass per mole

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Thus, we have the number of moles as follows:

\frac{41.5}{200}\text{ = 0.2075 mol}

The number of formula units in a mole is:

1\text{ mole = 6.02 }\times10^{22}\text{ formula units}

The number of formula units in 0.2075 mole will be:

0.2075\text{ }\times6.02\times10^{23}\text{ = }1.25\times10^{23}\text{ formula units}

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3 years ago
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