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mario62 [17]
3 years ago
8

Why is hydrogen placed above the alkali metals, on the periodic table?

Chemistry
2 answers:
sweet [91]3 years ago
6 0
Most of the gases are lighter than metal or some gases are heavy than metal 
Dmitriy789 [7]3 years ago
4 0
Well most gases are lighter then metals:D
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At what temperature will water change from a solid to a liquid <br> in Celsius?
Rina8888 [55]

Answer:

Explanation:

For water, the temperature needs to be a little over zero degrees Celsius (0C) for you to melt. If you were salt, sugar, or rock, your melting point is higher than that of water.

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A Chef fills out a 50mL container with 43.5g of cooking oil, What is the density of the oil?
ruslelena [56]

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3 years ago
Which of these is not a postulate of the kinetic-molecular theory of gases?
marin [14]

a) Gas particles have most of their mass concentrated in the nucleus of the atom.

b) The moving particles undergo perfectly elastic collisions with the walls of the container.

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d) The average kinetic energy of the particles is directly proportional to the absolute temperature.

e) All of the above are postulates of the kinetic molecular theory.

Gas particles have most of their mass concentrated in the nucleus of the atom.

Answer: Option A.

<u>Explanation:</u>

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The kinetic theory of gases is a significantly critical, however straightforward model of the thermodynamic conduct of gases with which numerous important ideas of thermodynamics were built up.

6 0
4 years ago
How many atoms of phosphorus are in 8.10 mol of copper(II) phosphate?
madreJ [45]
You know from the chemical formula that 1 mole of Cu3(PO4)2 contains 2 moles of P so you can work out how many moles of P are in 8.1 moles of Cu3(PO4)2. 

<span>As for anything, 1 mole of X contains 6.022 * 10^23 of X. Multiply moles of X by Avogadro's number.</span>
7 0
3 years ago
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Which statement is true about Air at different temperatures
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Are there any choices?
6 0
4 years ago
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