some fact about avogadro number ****Avogadro's number makes it possible for us to convert an almost uncountable number of atoms or molecules into measurable amounts that can be determined as a mass by a scale. Since chemists have established that a mole of carbon-12 atoms has 6.02214179 × 1023 atoms and an atomic mass of 12 grams, they calibrate mass spectrometers (instruments used to measure the very precise masses and relative amounts of atoms and molecules) to the mass of carbon-12. A mole of any other substance also contains 6.02 x 1023 atoms, but has a mass of more or less than 12 grams. ***** how can people who want to learn chemistry use these atomic masses to figure out how much of an element they want? There are two common ways. Let's consider this. We need one mole of sulfur in order to make plastic sulfur, which is what happens when sulfur is melted and then poured into water. On the periodic table, we find that sulfur has an atomic mass of 32 g/mol. So, if we want one mole of sulfur, we should use a scale and get 32 grams of it ANS-4THANK YOU VERY MUCH.HOPE THIS WILL HELP YOU .GOOD LUCK
How does Avogadro's number relate to the atomic mass and moles of an element? Avogadro's number can be used to convert...
Converting Particles to Moles Avogadro's number is used to convert particles of a substance to moles. CO2 How many moles of CO2 are in 2.50 x 1024 molecules CO,? Hamework
3. Define Avogadro's Number: 4. Write the Avogadro's number 602 000 000 000 000 000 000 000 in scientific notation. 5. What is a mole? 6. Calculate each of the following (Show Work): a the number of C atoms in 0.5 mol of C b. the number of so molecules in 1.28 mol of SO2 c. the moles of Fe in a simple containing 5.22 x1022 atoms of Fe 7. Calculate the molar mass for each of the following. Use...
1) What happens to the mass number and the atomic number of an element when it undergoes beta decay? Neither the mass number nor the atomic number change The mass number decreases by 4 and the atomic number decreases by 2 The mass number does not change and the atomic number increases by 1 The mass number does not change and the atomic number decreases by 2 The mass number increases by 2 and the atomic number increases by 1
What does atomic mass unit represent? O Mass of any element O Mass of all the isotopes of an element O Mass of a mole of a substance O Mass of any atom relative to carbon-12
What is atomic number of an unknown element whose atomic mass and formal charge are (40g/mol) and (-3) respectively? (The unknown element atom has 24 electrons.) Then how many neutrons does the element atom have?
What happens to the mass number and the atomic number of an element when it emits parmmandation A. The mass number remains unchanged while the atomic number decreases by one B. The mass number decreases by four and the atomic number decreases by two C. The mass number increases by four and the atomic number increases by two. D. The mass number remains unchanged while the atomic number increases by one E. The mass number and atomic numbers remain unchanged.
Using avogadros number diagram to figure out the moles and grams of the equation. Particles Avogadro's of A Moles of A Formula subscript Moles of Avogadro's number Particles of B number of B Molar mass Molar mass Grams of A Grams of B Show all work and calculations for all parts: Use the equation below to solve the problems: 4A1+30,- 2A1,0 1. How many moles of Alo, can be formed from 10.0 g of Al? 2. How many grams of...
Learning Goal: To understand how to use stoichiometry to convert between quantities of reactants and products in chemical equations Stoichiometry describes the quantitative relationships among the reactants and products of a balanced reaction by directly comparing mole ratios Stoichiometry can be used to convert mass, number of moles or number of particles between products and reactants, as shown in the flowchart displayed in the figure Review Constants Periodic Table To convert from a given quantity of one reactant or product...
Give the atomic number, mass number, and product element name when: A. The isotope of atomic number 84 and mass number 212 emits an alpha particle. and, B. The isotope of atomic number 48 and mass number 113 emits a beta particle.
ed chemical equation. However, the balanced chemical equation only works in units of moles. To convert grams of aluminum to moles of aluminum the atomic mass of aluminum must be used. grams of aluminum x 1 mole Al = 1 26.98 g Al To relate the moles of aluminum to KAl(SO4)2* 12H20, the mole to mole ratio must be found in the balanced chemical equation. In this case it is: 1 mole of Al3 = 1 mole KAl(SO4)2 12H20 As...