3 years ago

What elements is A, B, C, and D?

Chemistry

1 answer:

blagie [28]3 years ago

3 0

Answer:

A is Carbon atom ; B is Nitrogen C is Nitrogen D is oxygen

Explanation:

A is is isotope of Carbon atom with proton 6 electrons and 8 neutrons, B is Nitrogen atom with 7 protons and 7 neutrons, C is Isotope of Nitogen with 7 protons and 8 neutrons and D is isotope of oxygen with 8 protons and 7 neutrons.

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Identify the smaller

pochemuha

Answer:

sub-particle charge mass

protons +1 1

neutron 0 1

electron - 1 negligible

protons and neutrons are found in the nucleus

electrons in the shells orbiting the nucleus

3 0

4 years ago

A 50.0 mL sample of a 0.200 M aqueous solution of Na3PO4 was added to 50.0 mL of a 0.100 M aqueous solution of BaCl2. The mixtur

sukhopar [10]

Answer:

1.02 grams

Explanation:

The reaction between Na₃PO₄ and BaCl₂ is:

2Na₃PO₄(aq) + 3BaCl₂(aq) → Ba₃(PO₄)₂(s) + 6NaCl(aq)

We need to find the number of moles of Na₃PO₄ and BaCl₂:

$n_{Na_{3}PO_{4}} = C*V = 0.200 M*0.050 L = 0.01 moles$

$n_{BaCl_{2}} = C*V = 0.100 M*0.050 L = 0.005 moles$

Now, we need to find the limiting reactant:

$n_{Na_{3}PO_{4}} = \frac{2}{3}*0.005 moles = 0.0033 moles$

We have that it is needed 0.0033 moles of Na₃PO₄ to react with BaCl₂ and we have 0.01 moles of Na₃PO₄, so the limiting reactant is BaCl₂.

The number of moles of Ba₃(PO₄)₂ is:

$n_{Ba_{3}(PO_{4})_{2}} = \frac{0.005}{3} = 0.0017 moles$

Finally, the mass of Ba₃(PO₄)₂ is:

$m = n_{Ba_{3}(PO_{4})_{2}}*M = 0.0017 moles*601.93 g/mol = 1.02 g$

Therefore, should be obtained 1.02 grams of the precipitate.

I hope it helps you!

3 0

3 years ago

What is the gcf of 16 and 72? <br> a. 2 <br> b. 4 <br> c. 16 <br> d. 8

nadya68 [22]

Your answer is D. 8

16 = 2^4
72 = 2^3*3^2

So you'll choose 2^3 = 8

7 0

4 years ago

Read 2 more answers

The specific heat values of most _____ tend to be quite low

GrogVix [38]

This answer would be heat capacity

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3 years ago

why dont trees spontaneously catch on fire and burn all the time ? why dont fires stop immediately as soon as they start ?

Kamila [148]

Answer:

the fires keep on going

Explanation:

3 0

3 years ago