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Alex
4 years ago
10

All man-made and most carbon-based compunds are___ . 1. organic 2.inorganic

Chemistry
2 answers:
KonstantinChe [14]4 years ago
3 0

Answer:

2. Inorganic

Explanation:

All man-made and most carbon-based compounds are inorganic

katen-ka-za [31]4 years ago
3 0

Answer:

inorganic

Explanation:

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A mixture of 10 cm3 of methane and 10 cm3 of ethane was sparked with an excess of oxygen. After cooling to room temperature, thr
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In the combustion process using excess oxygen, each mole of methane results to 1 mole of co2 while ethane produces 2 moles of Co2. Under same conditions, these can be translated to volume. Hence the total volume absorbed is 10 cm3 + 20 cm3 = 30 cm3.
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3 years ago
What do repeated trials in an experiment allow a scientist to do?
Oksana_A [137]

Answer:

Learn from their experiment and know the possible results from trial and error

8 0
4 years ago
A 25.0 ml sample of 0.723 m hclo4 is titrated with a 0.273 m koh solution. the h3o concentration after the addition of 50.0 ml o
3241004551 [841]
This is an acid base reaction and the chemical equation for the above reaction is as follows;
KOH  + HClO₄ ---> KClO₄ + H₂O
the stoichiometry of acid to base is 1:1
KOH is a strong base and HClO₄ is a strong acid therefore they both ionize completely into their respective ions
Number of KOH moles - 0.723 M/1000 mL/L x 25.0 mL = 0.018 mol
Number of HClO₄ moles - 0.273 M/1000 mL/L x 50 mL = 0.013 mol 
since acid and base react completely, 0.013 mol of acid reacts with 0.013 mol of base.
The excess base remaining is - 0.018 - 0.013 = 0.005 mol 
total volume of solution = 25.0 mL + 50.0 mL = 75.0 mL 
[OH⁻] = 0.005 mol/0.075 L = 0.067 M 
pOH = -log[OH⁻]
pOH = -log(0.067 M)
pOH = 1.17
pOH + pH = 14
Therefore pH = 14 - 1.17 = 12.83
by knowing pH we can calculate the [H₃O⁺]
pH = -log [H₃O⁺]
[H₃O⁺] = antilog[-12.83]
[H₃O⁺]= 1.47 x 10⁻¹³ M
5 0
3 years ago
A 48.0-g piece of metal is dropped into 50.0 mL of water in a graduated cylinder. The water level rises to 62.4 mL. What is the
EleoNora [17]

calculation of the volume displaced in the cylinder:

Volume final - Volume initial

62.4 mL - 50.0 mL = 12.4 mL

Mass of metal = 48.0 g

Therefore:

D  = m / V

D = 48.0 / 12.4

D = 3.87 g/mL


Hope that helps!

4 0
3 years ago
An elements had three isotopes, determine the average atomic mass and
Kryger [21]

Answer:

126.86

Explanation:

Given parameters:

1x - percent abundance = 80%(0.8), mass = 127

2x - percent abundance = 17%(0.17), mass = 126

3x - percent abundance = 3%(0.03) , mass = 128

Unknown:

Average atomic mass = ?

Solution:

The average atomic mass is the average of all isotopes of element. It can be calculated using the expression below;

RAM  = (mass x abundance of 1x) + (mass x abundance of 2x) + (mass x abundance of 3x)

Now insert the parameters and solve;

RAM = (127 x 0.8) + (126 x 0.17) + (128 x 0.03)  = 126.86

3 0
3 years ago
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