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tankabanditka [31]
3 years ago
15

Im teaching myself chemistry and need a guide. anyone game?

Chemistry
1 answer:
strojnjashka [21]3 years ago
7 0
Which grade would u like to begin with? I can probably help with grade 9 Intro to Chemistry and Grade 10 Naming elements and compounds. That's all
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First to answer correctly gets 10 pts plus brainleist! (must answer correcty tho)
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Answer:

Explanation:

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Which of these following have a positive charges
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Talking about ions, a cation has a positive charge. That means a positive charge is gained by an atom that gives out electrons. 
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According to the following reaction, how many grams of sulfur are formed when 37.4 g of water are formed?
julia-pushkina [17]

Answer:

Mass = 100.8 g

Explanation:

Given data:

Mass of sulfur formed = ?

Mass of water formed = 37.4 g

Solution:

Chemical equation:

2H₂S + SO₂      →   3S + 2H₂O

Number of moles of water:

Number of moles = mass/molar mass

Number of moles = 37.4 g/ 18 g/mol

Number of moles = 2.1 mol

Now we will compare the moles of water and sulfur.

          H₂O         :            S

            2             :          3

           2.1            :         3/2×2.1 = 3.15

Mass of sulfur:

Mass = number of moles × molar mass

Mass = 3.15 mol × 32 g/mol

Mass = 100.8 g

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3 years ago
If the age of the middle layer of a rock sample is between 600 million years and 1 billion years, which of the following could b
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200 million year to 550 million years old

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Answer:

A im pretty sure

Explanation:

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