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dmitriy555 [2]
3 years ago
14

Why do chemists consider the periodic table so useful?

Chemistry
1 answer:
shusha [124]3 years ago
6 0
Because it puts all known elements in order, both by atomic number and characteristics
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Which is not a standard type of phytoplankton
GalinKa [24]

I think it is answer choice A:coral im not rlly sure but im kinda thinking choice A

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3 years ago
PLEASEEEEEE WILL GIVE BRAINLIST
mote1985 [20]

Answer:

1.728268... M

Explanation:

molar mass of NaCl: 58

101/58.44 = 1.728268...

Molarity = moles/Liter

so Molarity equals...

1.728268.../1

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How does the numbers of electrons and protons in an atom affect its electrical charge???
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(e) A 0.050 mol sample of a hydrocarbon was burned in excess oxygen.
LenKa [72]

The correct answer is 0.15.

We are aware that there is 0.05 mol of an unidentified hydrocarbon we will refer to as "X" and that its burning produces 6.6 g of carbon dioxide and 3.6 g of water.

These quantities might be converted to moles by applying the following formula:

amount= mass/ relative atomic mass

Thus, the following equation may be written for H2O: moles = 3.6 / 18 = 0.2 and for CO2: moles = 6.6 / 44 = 0.15.

0.05X + x'O2 = 0.15CO2 + 0.2H2O

This may be made simpler by dividing through by 0.05 (this step is likely to be the most helpful to you), resulting in:

1 x + x O2 = 3 co2 + 4 H2O

The hydrocarbon must have been the source of all the carbon in the carbon dioxide and all the hydrogen in the water.

Accordingly, 4 x 2 = 8 moles of H and 3 x 1 = 3 moles of C.

There are 3/1 = 3 Cs and 8/1 = 8 Hs in one X molecule.

This clearly identifies C3H8 or propane as the hydrocarbon X (dividing by 1 seems unnecessary, but it illustrates the process to use if there were more than one mol of X in the first equation).

To learn more about number of moles of carbon dioxide refer the link:

brainly.com/question/12723070

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6 0
2 years ago
How many water molecules (H2O) can be produced from 6 molecules of hydrogen gas (white) reacting with 6 molecules of oxygen gas
Vladimir79 [104]
I think you can only have 3 water molecules because you need 2 hydrogen molecules in every water molecule and you have 6 hydrogen molecules so 6/2=3 and the reactant that is limited would be hydrogen since it limits the amount of water molecules you can have
5 0
3 years ago
Read 2 more answers
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