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faust18 [17]
3 years ago
9

A student collects hydrogen and oxygen gas by using electrolysis to decompose water. Assuming the pressure and temperature of th

e gases
are held constant, how much Hydrogen gas is formed when 23.0 mL of oxygen gas is formed?
2 H20 -> 2 H2 + O2 (Show your work.)
Chemistry
1 answer:
sasho [114]3 years ago
4 0

may be I'm sure ok bahala na kyng

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This type of pure substance contains more than one type of element chemically bonded
Alex787 [66]

Answer:

A. Compounds

Explanation:

Firstly, don't let the word "pure" confuse you; this is pretty much irrelevant to the question.

The key to answering this question lies in "substance" and "more than one type of element chemically bonded."

Something you ought to memorize is that a substance is either an element or compound. Therefore, you can eliminate choices B./C.

Next, use the part of the definition that says "more than one type of element chemically bonded" to conclude that it's a compound. Not only is this the definition of a compound, but the fact that is says <em>more than one type of element</em> should automatically tell you that it is different from just a regular element (Choice D.).

6 0
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HELP MEEEE ASAP!!! Answer these questions based on what you learned from the passage. You can assume any body structure comes fr
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Answer:

1.Legs

2.Arms and hands

3.Armor

4.Skeletal

5.Carpenters

6.Brain

7.Skin

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Explanation:

You can google dem and it will show you all the answers

4 0
3 years ago
What is the pH of a 0.28 M solution of ascorbic acid
Nady [450]

Hey there!

Values Ka1 and Ka2 :

Ka1 => 8.0*10⁻⁵

Ka2 => 1.6*10⁻¹²

H2A + H2O -------> H3O⁺  + HA⁻

 Ka2 is very less so I am not considering that dissociation.

Now Ka = 8.0*10⁻⁵ = [H3O⁺] [HA⁻] / [H2A]

lets concentration of H3O⁺  = X then above equation will be

8.0*10−5 = [x] [x] / [0.28 -x

8.0*10−5 = x² /  [0.28 -x ]

x² + 8.0*10⁻⁵x  - 2.24 * 10⁻⁵

solve the quardratic equation

X =0.004693 M

pH = -log[H⁺]

pH = - log [ 0.004693 ]

pH = 2.3285

Hope that helps!

3 0
3 years ago
How many moles 1 gram H2SO4
Alexandra [31]

Answer:

0.0102 mole

Explanation:

Use and solve proportions for these with x as the unknown value.

4 0
3 years ago
Select the correct text in the passage.
vfiekz [6]

Explanation:

Oceans can influence weather and climate. For example, cities located near large water bodies like oceans tend not to have extreme climates

6 0
3 years ago
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