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DochEvi [55]
3 years ago
11

People have developed models of the universe for thousands of years. Identify two observations that a model of the universe woul

d need to explain in order to be useful
Chemistry
1 answer:
ella [17]3 years ago
4 0
It It would both need to show and explaine the universe
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A solution is 12.5% Na3PO, by mass. How many grams of Na3PO4
Harman [31]
<h2>Answer:  4.94 g   </h2>

Explanation:

Mass of solution of Na₃PO₄ = volume  × density

                                              =   35.9 mL × 1.10 g/mL

                                              =   39.49 g

Now, since the solution only contains 12.5% Na₃PO₄, then the mass of Na₃PO₄ is 12.5% of 39.49 g

                                 12.5% × 39.49 g = <u>4.94 g   </u>        

7 0
3 years ago
The nucleus of the atom contains the greatest concentration of mass of an atom. which arrow is pointing at the nucleus of nitrog
Mashutka [201]
The nucleus of an atom of any element is located at the very center. It contains subatomic particles, proton and neutron. That's why it contains the greater mass, because only the electrons orbit the nucleus. So, you would expect the arrow to point somewhere in the center. A picture of nitrogen's nucleus is shown in the attached picture.

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3 years ago
Where photosynthesis takes place?
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Answer:

chloroplasts

Explanation:

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What mass of H2 is needed to react with 8.5 g of O2 according to the following equation G plus O2 (G)plus H2 ( G)?
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The correct answer is number 1
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Ag + HCl --&gt; ?<br> a) No reaction<br> b) AgCl + H2<br> c) AgCl + H2O<br> PLEASE HELP
Volgvan

Answer:

AgCl + H2 - Chemical Equation Balancer.

8 0
3 years ago
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