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Inessa [10]
3 years ago
14

Help on this question please

Chemistry
1 answer:
oee [108]3 years ago
8 0

Answer:

First choice: 2

Explanation:

There are 2 phosphorous (P) in the substance.

Ignore the strontium (Sr3) part because you are looking to isolate the P from (PO4)2.

Break the chemical equation apart to get 1 Phosphorous atom, and 4 Oxygen atoms.

Now, multiple 1 by 2 because that are 2 phosphate to get 2 phosphorous atoms.

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B) How many moles of Na2O can be produced from 13.5 moles Na?
dolphi86 [110]

Answer: 6.75 moles of Na_2O can be produced from 13.5 moles Na

Explanation:

The balanced chemical equation  for formation of Na_2O from Na is:

4Na+O_2\rightarrow 2Na_2O  

According to stoichiometry :

4 moles of Na give = 2 moles of Na_2O

Thus 13.5 moles of Na give =\frac{2}{4}\times 13.5=6.75moles  of Na_2O  

Thus 6.75 moles of Na_2O can be produced from 13.5 moles Na

3 0
3 years ago
1) How many molecules are in 0.02 moles of beryllium iodide?
disa [49]

Answer:

3 grams??

Explanation:

I think this would be the answer you are looking for.

6 0
3 years ago
What is carbon fixation?
Crazy boy [7]
Conversion process of non-organic carbon dioxide into organic compounds by living organisms.


Example: Photosynthesis
7 0
4 years ago
This is how fluorine appears in the periodic table. A green box has F at the center and 9 above. Below it says fluorine and belo
Oksana_A [137]
1. Atomic weight of fluorine

2. Number of proton and neutrons found in the nucleus of the element

3. And every number uniquely identifies each of the the elements
8 0
3 years ago
A given substance is a white, granular solid at 25 °C that does not conduct electricity. It melts at 750 °C wand the melt conduc
xxMikexx [17]

Answer:

Ionic crystal

Explanation:

An ionic crystal has a high melting point. In an ionic crystal, the ions are tightly held in electrostatic attraction by their oppositely charged neighbors forming a rigid three dimensional lattice. However, when this solid melts, the rigid crystal structure collapses and the individual ions become free and mobile. Hence the melt conducts electricity.

3 0
3 years ago
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