Answer:
1340 mg
Explanation:
concentration is the number of moles of solute in a 1000 mL of solution
the concentration of KCl solution is 1.20 M
There are 1.20 mol in 1000 mL of solution
a volume of 1000 mL contains - 1.20 mol
therefore 15 mL solution contains - 1.20 mol / 1000 mL x 15 mL = 0.018 mol
the molar mass of KCl is - 74.5 g/mol
mass of 1 mol is - 74.5 g
therefore mass of 0.018 mol is - 74.5 g/mol x 0.018 mol = 1.34 g
1000 mg - 1 g
therefore 1.34 g in milligrams is - 1.34 g x 1000 mg/g = 1340 mg
Answer:
C)
Explanation:
M1V1 = M2V2
40.0ml*0.25M = M2*50.0ml
M2 = 40.0*0.25/50.0 = 0.20 M
<span>There
is combustion or explosion. This is because of
the oxidation reaction produces heat rapidly hence able to spark a fire. Some materials
oxidize rapidly and hence their property is harness
in motion/movement processes. An example is the use of fossil fuels in combustion
engines.</span>
Enantiomers<span> and </span>diastereomers<span> are two sub-types of </span>stereoisomers<span>. </span>Enantiomers<span>are isomers that are non-superimposable, mirror images. </span>Diastereomers<span> are not mirror images and are non-superimposable. </span>Diastereomers<span> include both the </span>cis-isomer<span> and the </span>trans-isomer<span>.</span>
Answer:
Potassium Nitride is composed of the greatest number of atoms.
Explanation:
In order to find the number of atoms present in each compound we will write down their molecular formulas and then we will add up the number of atoms present in them.
A: Dinitrogen Monoxide:
Chemical formula of Dinitrogen Monoxide is N₂O. Therefore, it contains two atoms of Nitrogen and one atom of oxygen Hence, in total it contains 3 atoms.
B: Sodium Chloride:
Chemical formula of Sodium Chloride is NaCl. Therefore, it contains one atom of Sodium and one atom of Chlorine Hence, in total it contains 2 atoms.
C: Potassium Nitride:
Chemical formula of Dinitrogen Monoxide is K₃N. Therefore, it contains three atoms of Potassium and one atom of Nitrogen Hence, in total it contains 4 atoms.
D: Carbon Dioxide:
Chemical formula of Carbon Dioxide is CO₂. Therefore, it contains one atom of Carbon and two atoms of Oxygen Hence, in total it contains 3 atoms.