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trasher [3.6K]
3 years ago
9

Plz help with any you can !!!!!

Chemistry
2 answers:
EleoNora [17]3 years ago
8 0
Number 1 is c. because objects reflect light we see it.
ycow [4]3 years ago
8 0
1. C
2. sun, stars, moon
Hope this helps!
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Write the symbols for the following isotopes: Its atoms contain 50 electrons and 70 neutrons
Veronika [31]
Since this element has 50 electrons you know that it has 50 protons. The number of proton= the atomic number. Atomic number 50 is tin. The atomic symbol for tin is Sn and the weight is 120. So this is the tin 120 isotope
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3 years ago
The effectiveness of nitrogen fertilizers depends on both their ability to deliver nitrogen to plants and the amount of nitrogen
densk [106]

Answer:

Ammonia > Urea > Ammonium nitrate > Ammonium sulphate

Explanation:

Percentage by mass of nitrogen in NH3:

Molar mass of NH3= 17 g/mol

Hence % by mass = 14/17 × 100 = 82.35%

% by mass of NH4NO3

Molar mass of NH4NO3 = 80.043 g/mol

Hence; 28/80.043 × 100 = 34.98%

% by mass of (NH4)2SO4;

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Hence; 28/132.14 × 100 = 21.19%

% by mass of CH4N2O

Molar mass of urea = 60.0553 g/mol

Hence 28/60.0553 × 100 = 46.62%

8 0
3 years ago
Which of the following is NOT an example of covalent bonding? * 2 points H20 NaF NH3 O2
Pachacha [2.7K]

Answer:

I THINK NH3

Explanation:

4 0
2 years ago
What is the molar mass of chcl3?
svetlana [45]
Approximately 119.4 g, you take the mass on the periodic table of each element and add the numbers up
7 0
3 years ago
10. (2 points) What is the process by which a solute forms a solution in a solvent. A) calisthenics B) bumping C) dissolution D)
Triss [41]

Answer: (C) Dissolution is the process by which a solute form a solution in a solvent.

Explanation: Dissolution can be described as the process by which a solute dissolves in a solvent to give a solvent.

The solute may be a solid, liquid or gas and solvent is usually a liquid but can also be liquid, gas or supercritical fluid. The most common solvent is water and it is referred to as the universal solvent.

Example are:

1.Stirring of sugar in water.

In this case the solute is the sugar and the solvent is water.

2.Organic substances dissolves readily in solvent like kerosene and benzene and they are known as non-polar solvent while the organic substances are the solute

4 0
3 years ago
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