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Alekssandra [29.7K]
3 years ago
8

Is it possible for the properties of a substance with a specific type of bond to vary

Chemistry
1 answer:
Gekata [30.6K]3 years ago
7 0
<span>water has a specific type of bonds, but as you change the temperature, its density will vary somewhat.</span>
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Why do you think the atomic number is basically represented by the number of protons and not the number of electrons?
Naya [18.7K]

Answer:

The atomic number equals the charge on the nucleus. It therefore also equals the number of protons in the nucleus and also equals numerically the number of electrons in the neutral atom. i think so, hope this helps you

Explanation:

6 0
3 years ago
A scientist wants to make a solution of tribasic sodium phosphate, Na3PO4, for a laboratory experiment. How many grams of Na3PO4
san4es73 [151]

Answer:

83.20 g of Na3PO4

Explanation:

1 mole of Na3PO4 contains 3 moles of Na+.

Mole of Na ion to be prepared = Molarity x volume

                 = 0.700 x 725/1000

                     = 0.5075 mole

If 1 mole of Na3PO4 contains 3 moles of Na ion, then 0.5075 Na ion will be contained in:

           0.5075/3 x 1 = 0.1692 mole of Na3PO4

mole of Na3PO4 = mass/molar mass = 0.1692

Hence, mass of Na3PO4 = 0.1692 x molar mass

                                     = 0.1692 x 163.94

                                        = 83.20 g.

83.20 g of Na3PO4 will be needed.

3 0
3 years ago
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Which of the following reactions is a synthesis reaction?
Vedmedyk [2.9K]
<h3>Answer:</h3>

B) 4H₂(g) + O₂(g) ⟶ 2H₂O(l)

<h3>Explanation:</h3>
  • Chemical reactions occur when compounds or elements combine to form new compounds or other elements.
  • Chemical reactions may be classified into various types which include synthesis reactions, replacement reaction, decomposition reactions, and precipitation reactions among others.
  • In our case, we were supposed to identify a synthesis reaction.
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  • A synthesis reaction is a reaction that occurs when two elements or small compounds combine to generate a large compound.
  • In this case, B is the choice that shows a synthesis reaction where hydrogen gas combines with oxygen gas to yield water.
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If a substance is not chemically pure, it is either a heterogeneous mixture or a homogeneous mixture. If its composition is uniform throughout, it is a homogeneous mixture.

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3 years ago
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