The H+ will react with Magnesium to release hydrogen Gas under the equation Mg + 2H+ --> Mg(2+) + H2(g)
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Answer:
Mass = 17.8 g
Explanation:
Given data:
Number of atoms of Ca = 2.68 × 10²³
Mass in gram = ?
Solution:
Avogadro number:
The given problem will solve by using Avogadro number.
It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.
The number 6.022 × 10²³ is called Avogadro number.
1 mole = 6.022 × 10²³ atoms
2.68 × 10²³ atoms × 1 mole /6.022 × 10²³ atoms
0.445 mol
Mass in gram;
Mass = number of moles × molar mass
Mass = 0.445 mol × 40 g/mol
Mass = 17.8 g
Answer:
1.84 g/cm³
Explanation:
A flask has a mass of 78.23 g when empty and 593.63 g when filled with water. The mass of water is:
m(water) = 593.63 g - 78.23 g = 515.4 g
The density of water is 1.00 g/cm³. The volume of water (and the flask) is:
515.4 g × (1 cm³/1.00 g) = 515 cm³
When the same flask is filled with concentrated sulfuric acid, H₂SO₄, its mass is 1026.57 g. The mass of H₂SO₄ is:
m(H₂SO₄) = 1026.57 g - 78.23 g = 948.34 g
948.34 g of sulfuric acid occupy a volume of 515 cm³. The density of sulfuric acid is:
ρ = 948.34 g / 515 cm³ = 1.84 g/cm³
Answer:
Ionic compounds consist of positive and negative ions bound together by electrical attraction. Molecular compounds are groups of atoms held together by covalent bonding, or the sharing of electrons..
Explanation:
I took the test and the correct answer is True. Sorry if this is late hope it helps!
