0
To find the number of atoms in a substance, please make sure you have the formula of that substance first. For example, let us take water as an example.
Substance: Water
Formula: H2O
Let us now analyze this formula:
H2 = 2 Hydrogen atoms
O = 1 Oxygen atom
2 hydrogen atoms + 1 Oxygen atom = 3 atoms in total
Thus you can determine the number of atoms in a substance.
Wiki User
∙ 14y ago
Wiki User
∙ 14y agoCalculating the number of atoms is virtually impossible. Atoms are like little tiny specks of sand. That means that atoms are all around us and we cannot see them. <- False. There is a way to do it, I just forgot how. I'm asking for either a formula, or an outline of how. Is finding the formulas when you balance the equation and all? Because I remember that, just forgot what it went to.
Wiki User
∙ 10y agoyou look at the number at the bottom right of the element, if it has one, if not just pretend that there is an invisible 1 there. Then, if there are any numbers around the symbol, multiply them, if not that is the atom number.
The chemical formula. For example, calcium fluoride, CaF2, has two atoms of fluorine for each single atom of calcium.
Wiki User
∙ 14y agoCalculate the molecular masses, in g/mol, of the substances below. Also, determine the number of atoms present in one molecule of each substance.
Molar Mass No. of atoms per molecule
CO2 44 3
H2SO4 98.1
7
Wiki User
∙ 13y agoSimply, count it in its formula.
Example :- CH3COOH has 1+3+1+2+1=8 atoms.
or if the quantity of compound is given in no. of moles, then multiply the moles with
6.022 x 1023 to get the no. of its molecules.
Wiki User
∙ 13y agoUse a scale or a balance to measure the mass of the substance.
Wiki User
∙ 10y agoThe only substances that have mass numbers are the isotopes of elements. For these, the mass number is the sum of the numbers of protons and neutrons in the nucleus of each atom.
Wiki User
∙ 10y agoThis is determined through knowing the Stoichiometry of the elements in the compound. for example for H2O, Two hydrogen atoms combine with one Oxygen atom to form the compound H2O.
Wiki User
∙ 7y ago1 mol of a substance has 6,022 140 857.10e23 molecules.
Wiki User
∙ 10y ago3.53g of NaOH
Add your answer:
Earn +20 pts
What molecules determine the tissue specificity of hormones?
Receptors
Do atoms and molecules determine how matter behaves?
yes
How many molecules are in 10.0 g of pure C8H8O3?
To determine the number of molecules in 10.0 g of C8H8O3, we need to calculate the number of moles first. The molar mass of C8H8O3 is 152.15 g/mol. By dividing 10.0 g by the molar mass, we find that there are approximately 0.0658 moles of C8H8O3. To convert moles to molecules, we multiply the number of moles by Avogadro's number, 6.022 x 10^23, giving us about 3.96 x 10^22 molecules.
How do you decrease the number of molecules in a glass of water without changing the number of water molecules?
If the water is impure, you could remove the impurities. If the water is pure, it's impossible to decrease the number of molecules without changing the number of water molecules, which would be the only kind of molecules present in that case.
What is the smallest number of glucose molecules That can form a polysaccharides?
What is the smallest number of glucose molecules that can form a polysaccharide?
Does the number of molecules determine what type of element it is?
The element is determined by the number of protons in its nucleus. Since molecules are made up of elements, the number of molecules has nothing to do with determining the element.
Determine the number of bromine molecules present in the flask containing 0.120 of liquid bromine?
A flask contains 0.120mol of liquid bromine, Br2. Determine the number of bromine molecules present in the flask
If A flask contains 440 mol of liquid bromine Determine the number of bromine molecules in the flask?
A flask contains 0.410 of liquid bromine, . Determine the number of bromine molecules present in the flask.
A flask contains 0.380 mol of liquid bromine Determine the number of bromine molecules present in the flask?
2,288.1023 molecules
What is avogadro s number used to determine?
The number of basic particles - atoms of molecules - of a compound in one mole of the substance.
A flask contains 0.270 of liquid bromine Determine the number of bromine molecules present in the flask?
The value 6.022 x 10^23 is called Avogadro's number. So you multiply the amount by this number to determine the molecules..270 X (6.022x10^23) = 1.63 x 10^23
A flask contains 0.500 of liquid bromine Determine the number of bromine molecules present in the flask?
when asking this question they are looking for the number of Br2 therefore .5 mol .5*6.022*1023 molecules which equals 3.011*1023 molecules
Avogadro did experiments to determine avogadro's number?
No! Avogadro just guessed the average number of molecules,ions,atoms number in one mole of any compound,element,etc.
A flask contains 0.310 of liquid bromine Determine the number of bromine molecules present in the flask?
.310 MOLES 6.022*(10^23 ) molecules --------------- times ------------------------------------ = 1.8668 * 10^23 molecules 1 mole because there are 3 sig figs the answer should reflect that number. so the answer is 1.87 * 10^23 molecules
Why is the mass number not exact?
The Atomic mass units of an element are never simple numbers because it is impossible to determine the number of molecules in one element, and as a result we are simply left with a vague idea of how many grams per one mole (which is composed of molecules) of that element.
What molecules determine the tissue specificity of hormones?
Receptors
Do atoms and molecules determine how matter behaves?
yes
