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mash [69]
3 years ago
10

What is the lewis dot structure for Ca3P2 and Al2O3?

Chemistry
1 answer:
zlopas [31]3 years ago
3 0

Answer:

The atomic number of the sodium atom is 11. The atomic mass number can be estimated by rounding the atomic mass to 23.

Explanation:

The atomic number of the sodium atom is 11. The atomic mass number can be estimated by rounding the atomic mass to 23.

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You have to remember this memory aid, diagonals and all.

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What is the meaning of polyatomic
Svetllana [295]

Explanation:

consisting of many atoms is known as polyatomic

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4 years ago
How many liters are in 7.41 x 1026 atoms of helium (He) at STP?
Snezhnost [94]

Answer:

Explanation: Avogadro number,N, = 6.02214076*10^23per mole —> 22.71L

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8 0
3 years ago
An acid with molar mass 84.48 g/mol is titrated with 0.650 M KOH. What volume of KOH solution is needed to titrate 1.70 grams of
RSB [31]

Answer:

V=0.0310L=3.10mL

Explanation:

Hello.

In this case, since the acid is monoprotic and the KOH has one hydroxyl ion only, we can see that at the equivalence point the moles of both of them are the same:

n_{acid}=n_{KOH}

Thus, since we are given 1.70 g of the acid, we compute the moles of acid that were titrated:

n_{acid}=1.70g*\frac{1mol}{84.48g}=0.0201mol

Which equal the moles of KOH. In such a way, since the molarity is defined as moles over liters (M=n/V), the liters are moles over molarity (V=n/M), thus, the resulting volume is:

V=\frac{0.0201mol}{0.650mol/L}\\\\V=0.0310L=3.10mL

Best regards!

7 0
3 years ago
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