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hjlf
3 years ago
15

Hello, I hope y'all help me answer this science question, I will mark brainlist to whoever answers it right

Chemistry
1 answer:
vichka [17]3 years ago
4 0

Answer:

1. Hot air is less dense then cold air therefore it is lighter the cold air. Because the hot air is less dense it helps lift the balloon up and because cold air is more dense it is heavier and helps the balloon slowly drop the balloon.

To be honest I don't know what 2 is but hope this helps some!

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Who was the first to state the concept of an atom?
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<span>Democritus was the first</span>
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What are the three particles of an atom? A. Neutron, electron, and ion B. Proton, neutron, and electron C. Electron, proton, and
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saw5 [17]

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3 years ago
Which physical quantity is not used when determining the stoichiometry in this experiment?
Reptile [31]

The physical quantity that is not used when determining the stoichiometry in this experiment is temperature.

Stoichiometry offers a way in which we can calculate the amount of reactants and products using mass - mole relationship. The mass of reactants, number of moles of reactant, mass of product and mass of precipitate can all be used to determine the stoichiometry.

However, the temperature of a reaction is not used to determine the stoichiometry of the reaction.

Learn more: brainly.com/question/17320375

Which physical quantity is NOT used when determining the stoichiometry in this experiment?

  • mass of precipitate
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  • moles of reactant
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