Answer:
1.1 g Na2SO4
Explanation:
First convert mL to L. Then multiply by the Molarity to get moles, then multiply by the molar mass to get grams.
15 mL x 1 L x 0.50 mol Na2SO4 x 142 g = 1.1 g
10^3 mL 1 L mol Na2SO4
Answer:
a) Hypothesis
b) Law
c) Theory
Explanation:
a) It is a hypothesis because it is not known if when his musical production was married he had increased.
b) it is a law, because it refers to the law of gravitational attraction that is fulfilled between an object and the earth.
C) It is a theory, since it refers to the theory of the atom and matter, where all matter is composed of atoms.
Halogens are noble gasses, located on the far left of the periodic table. They are used partly for lighting, and are of great importance to scientists because they don't "mingle" easily with other elements.
Protons and neutrons have similar mass. Electrons are smaller than a proton or a neutron. An atomic scientist was studying an atom and through experimentation found that the total negative charge of the area surrounding the nucleus is -9.
Answer:
Explanation:
We will need a balanced chemical equation with masses, moles, and molar masses.
1. Gather all the information in one place:
M_r: 2.016 17.03
3H₂ + N₂ ⟶ 2NH₃
m/g: 6.33 × 10⁻⁴
2. Calculate the moles of H₂
3. Calculate the moles of NH₃
The molar ratio is 2 mol NH₃/3 mol H₂.
4. Calculate the molecules of NH₃
There are 6.022 × 10²³ molecules of NH₃/1 mol NH₃.