Answer:
119.38 g/mol
Explanation:
In chemistry, the formula weight is a quantity computed by multiplying the atomic weight (in atomic mass units) of each element in a chemical formula by the number of atoms of that element present in the formula, then adding all of these products together
CHCI3 = Cyclohexanol
Molar mass 100.158 g/mol
#12
Answer:
B is the correct model of beryllium.
Explanation:
An atom consist of electron, protons and neutrons. Protons and neutrons are present with in nucleus while the electrons are present out side the nucleus.
All these three subatomic particles construct an atom. A neutral atom have equal number of proton and electron. In other words we can say that negative and positive charges are equal in magnitude and cancel the each other. For example if neutral atom has 6 protons than it must have 6 electrons. The sum of neutrons and protons is the mass number of an atom while the number of protons are number of electrons is the atomic number of an atom.
For example in case of beryllium:
The atomic number of beryllium is 4.
The atomic mass is 9 amu.
Number protons = 4
Number of electrons = 4
Number of neutrons = 9-4 = 5
So b is correct answer because 5 neutrons and 4 protons are present with in nucleus while 4 electrons are present out side.
I believe your answer is B.
The required mass is grams.
This question needs to use the molarity equation, , where M is molarity, n is number of moles and V is the volume. With this equation we can find the number of moles. The volume of 570ml should be converted to L for correct units.
Multiply the number of moles by the molecular mass of which is 95.21 g/mol to get the mass.
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109 for brainly just did it 5/5 correct (Three significant figures)