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julia-pushkina [17]
2 years ago
15

In 1687, ___ explained that gravitational forces hold the solar system together.

Chemistry
2 answers:
elena55 [62]2 years ago
5 0
The answer is A. Newton
Nimfa-mama [501]2 years ago
3 0
Newton ,perhaps as many other originations  use it as a gravitational law
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Which is a property of all atoms?
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B. a nucleus with a positive charge.
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How many liters of CO2 are formed when 14.0 g of CaCO3 react at 1.00 atm and 1000K
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PLEASE HELP<br><br> is this a chemical or physical change???
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Which of the following is the balanced equation for P + O2 → P2O5? Question 3 options: A) 4P + O2 → 2P2O B) P + 5O2 → 2P2O5 C) 4
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Given equation:

P + O2 → P2O5

In order for the equation to be balanced, the stoichiometry of the atoms of one kind on the reactant side must be equal to that on the product

Reactants                                            Products

P = 1                                                       P = 2

O = 2                                                     O = 5

The balanced equation would be:

4P + 5O2 → 2P2O5

Reactants                                            Products

P = 4                                                      P = 4

O = 10                                                    O = 10

Ans: D)


4 0
3 years ago
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Select all statements that are correct:____
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Answer:

A, C and D are correct.

Explanation:

Hello.

In this case, since the relationship between the vapor pressure of a solution is directly proportional to the mole fraction of the solvent and the vapor pressure of the pure solvent as stated by the Raoult's law:

P_{vap}^{solution}=x_{solvent}P_{solvent}

Since the solute is not volatile, the mole fraction of the solute is not taken into account for vapor pressure of the solution, therefore A is correct whereas B is incorrect.

Moreover, since the higher the vapor pressure, the weaker the intermolecular forces due to the fact that less more molecules are like to change from liquid to vapor and therefore more energy is required for such change, we can evidence that both C and D are correct.

Best regards.

4 0
3 years ago
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