Answer:
New cells arise from existing cells.
Explanation:
According to the cell theory, "all living things are composed of one or more cells; the cell is the basic unit of life; and new cells arise from existing cells"(Lumen Learning).
Cells are the basic unit of life. Some organisms consists of only one cell while other organisms have many cells and are called multicellular organisms.
In multicellular organisms, new cells are formed by the division of preexisting cells.
Answer:
m = 0.5556 mol/kg
Explanation:
The molality of any solution is calculated using the following expression:
m = moles solute / kg solvent (1)
So in order to calculate the molality of this solution, we need to calculate the moles of the glucose using the expression:
n = mass / molecular weight (2)
The molecular weight of glucose, can be calculated using the molecular mass of the atoms in the glucose:
C = 12 g/mol; H = 1 g/mol; O = 16 g/mol
the molecular weight is:
MW = (12*6) + (12*1) + (6*16) = 180 g/mol
Then, the moles of glucose:
moles = 50 / 180 = 0.2778 moles
The solvent in this case is water, and 500 g of water is 0.5 kg of water, so the molality is:
m = 0.2778 / 0.5
m = 0.5556 mol/kg
A can of peas and carrots has 2 typed of matter (peas and carrots) that can be separated my physical means. (You can do it with a spoon). Another example= chicken noodle soup, a snickers bar
Sulpher is the name of the atom with 16 protons 15 neutrons and 18 electrons
Answer:
c) The mass of a system is dependent upon chemical reactions that may occur.
Explanation:
Law of Conservation of Mass -
Also called the principle of mass conservation , this law was first independently given by the scientist Mikhail Lomonosov and later was rediscovered in 18th century by the father of chemistry Antoine Lavoisier .
According to this law , for a closed system , the mass of the system remains constant , before and after a reaction .
Therefore , the mass is conserved for a chemical reaction .
The statement a , b , d are completely correct ,
But the incorrect statement is the c , because the mass of the system is independent of the chemical reaction .
