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Andrews [41]
3 years ago
10

Calculate the percentage composition of Mg3 (Po4)2

Chemistry
1 answer:
lutik1710 [3]3 years ago
7 0
Mg3(PO4)2 - the molar mass would be 262g/mol, which is 100%

Atomic mass of Mg is 24, since we have 3Mg we multiply by 3 and get a mass of 72

262 : 100% = 72 : x%

x = 72*100 / 262

x = 27.5%

And do that for every element — get the molar mass of P and multiply by 2, use a ratio, and get the molar mass of O and multiply by 8 and use ratios :)
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Which of the following will occur soon after a population of prey increases slightly in size?
Lady bird [3.3K]
Your answer is D predator population will increase greatly. That's because if there's more prey there will be more food and its good for the predators to produce more because they don't got to worry about food. Speaking how they preys population grew.

So your answer is D.
4 0
3 years ago
Why is it the principle about the relationship between mass and volume always true of substance, but not always true of mixtures
Xelga [282]

Answer:

For pure substances, the mass and volume will always be the same or will always change the same way because all substance are the same throughout.

While for mixtures, you can have varying amount of each component therefore mass and volume will not change the same way for substances

7 0
1 year ago
If you have 23.8g of CaCl2, how many formula units is it?
NemiM [27]

Answer:

1.3×10²³ formula unit

Explanation:

Given data:

Mass of CaCl₂ = 23.8 g

Number of formula unit = ?

Solution:

Number of moles = mass/molar mass

Number of moles = 23.8 g/110.98 g/mol

Number of moles = 0.21 mol

1 mole of any substance contain 6.022×10²³ formula unit

0.21 mol × 6.022×10²³ formula unit / 1mol

1.3×10²³ formula unit

8 0
3 years ago
The pressure of a certain amount of gas is directly proportional to the temperature (measured on the Kelvin scale) and inversely
Svetradugi [14.3K]

Answer:

not sure, but you know what?

Explanation:

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6 0
3 years ago
Si dos elementos tienen igual valor del número cuántico n y diferente l, ml y ms entonces deben estar en : El mismo orbital, per
OlgaM077 [116]

Answer:

El mismo nivel, pero diferente subnivel y orbital

Explanation:

En un átomo, el número cuántico principal n muestra el nivel de energía del electrón.

Si dos electrones tienen el mismo valor del número cuántico principal n, simplemente significa que están en el mismo nivel de energía.

Sin embargo, cuando los números cuánticos l y ml difieren, los electrones deben estar en diferentes subniveles y orbitales.

8 0
3 years ago
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