Although a single molecule of water is composed of one atom of oxygen bonded to two hydrogen atoms (H2O), a collection of purely H2O molecules exists only as a gas. For water to be liquid—and form oceans, lakes, rivers, and rain—the single H2O molecules have to clump together to form much larger, heavier structures.
Q. How many atoms on the tip of a pen?
If the tip of the pen is 1 mm, it would take about 2 million atoms to stretch across the diameter of the tip of the pen.
Table of Contents
- Q. How many atoms on the tip of a pen?
- Q. How many atoms hydrogen would it take to cover the distance across your fingernail?
- Q. How many atoms can fit on a period?
- Q. How many atoms are in a drop of water?
- Q. How many oxygen atoms are in a drop of water?
- Q. How many total atoms are in H2O?
- Q. How many atoms are in 90 grams of water?
- Q. How many atoms are in 5g of water?
- Q. How do you know how many atoms an element has?
- Q. How do you calculate the number of moles needed?
- Q. What is the mass of one mole of magnesium?
- Q. What weighs more one mole of helium or one mole of lead?
Q. How many atoms hydrogen would it take to cover the distance across your fingernail?
Atomic Properties. The atom is about 10-10 meters (or 10-8 centimeters) in size. This means a row of 108 (or 100,000,000) atoms would stretch a centimeter, about the size of your fingernail.
Q. How many atoms can fit on a period?
“A person’s body is actually made up of trillions of cells (source: Science Concepts – Cells by Silverstein)”, but how many atoms could fit inside a human cell? 125 million atoms could fit inside the period at the end of this sentence.
Q. How many atoms are in a drop of water?
3 atoms
Q. How many oxygen atoms are in a drop of water?
1 mol O contains 6.022 × 1023 O atoms; its mass is 15.994 or 16.00 g. 1 mol Br contains 6.022 × 1023 Br atoms; its mass is 79.90 g….Number of Atoms in a Drop of Water.
| Molecule | Molecular Weight | Mass of 1 Mol of Molecules |
|---|---|---|
| Br2 | 2(79.90) = 159.80 | 159.80 g |
| O2 | 2(16.00) = 32.00 | 32.00 g |
| H2O | 2(1.008) + 16 = 18.02 | 18.02 g |
Q. How many total atoms are in H2O?
three atoms
Q. How many atoms are in 90 grams of water?
Answer: Hence 90 g of water will contain 30.11×10^(23) molecules.
Q. How many atoms are in 5g of water?
Water consists of two hydrogen atoms connected to one oxygen atom, therefore molecular mass of water (M) is equal to sum of molecular masses of oxygen and two hydrogen atoms which is 2×1. 01 +15.99. Therefore molecular mass of water (M) is equal to 18,01. So in 5g sample of water there is 1.67 x 1023 water molecules.
Q. How do you know how many atoms an element has?
If you have a sample that contains only atoms of a particular element, weigh the sample in grams and divide by the atomic weight of the element. The quotient tells you the number of moles. Multiply that by Avogadro’s number, and you’ll find out how many atoms the sample contains.
Q. How do you calculate the number of moles needed?
Determine the number of moles needed to react by multiplying by moles of the known substance by the stoichiometric ratio of the unknown substance to the known substance.
Q. What is the mass of one mole of magnesium?
The relative masses of each element can be found on the periodic table. For example, one atom of magnesium weighs 24.31 amu (atomic mass units). However, one mole of magnesium weighs 24.31 g.
Q. What weighs more one mole of helium or one mole of lead?
Terms in this set (27) The amount of substance contained in 6.022x 10^23 particles. A mole, like a dozen, always contains a specific number of objects; same amount of atoms but different masses. The number of helium atoms in a mole of helium is equal to the number of lead atoms in a mole of lead.
