Answer:
undergo global warming at a faster rate than what we are seeing currently
Explanation:
because sun and volcanoes are the hottest things so it would undergo global warming at a faster rate.
Solid Silicon can be reacted with Nitrogen gas at a high temperature to form silicon nitride (Si3N4).
1.20 moles of Silicon are added to 1.00 moles of Nitrogen gas.
(5 Points) Balance the equation and indicate the phases.
Si (___) + N2 (___) → Si3N4 (___)
(5 Points) What is the limiting reactant? You must show your work.
<span>Mn(HPO4)2 - managanese (II) monohydrogen phosphate ion</span>
Answer:
The atomic mass of X is 204.5 amu.
Explanation:
We know that metals react with oxygen forming a metallic oxide, according to the following equation:
4 X + O₂ ⇄ 2 X₂O
The oxide is formed just by <em>just</em> two elements, the metal and oxygen. The total mass of the oxide is 1.4158g and the mass of the metal in the oxide must be 1.3625g because of the Law of conservation of mass. Then, we can substract the mass of the metal to obtain the mass of oxygen.
mass O + mass X = mass X₂O
mass O = mass X₂O - mass X = 1.4158g - 1.3625g = 0.0533g
So, for every 0.0533g of oxygen there are 1.3625 g of the metal X. In the formula X₂O there is 1 mol of atoms of oxygen, which has a molar mass of 16 g/mol. We can use this data to find out the mass of the metal in the oxide.
Given in the formula there are 2 moles of atoms of X, the molar mass should be half of 409g, i.e., 204.5g/mol. If a mol of X has a mass of 204.5 g, an atom of X has a mass of 204.5 amu, according to its definition.
Answer:
The total number of grams of O2 is 48.0 grams (option B)
Explanation:
Step 1: Data given
Mass of water = 54.0 grams
Molar mass of water (H2O) = 18.02 g/mol
Step 2: The balanced equation
2 H2 + O2 → 2 H2O
Step 3: Calculate moles of H2O
Moles H2O = mass H2O / molar mass H2O
Moles H2O = 54.0 grams / 18.02 g/mol
Moles H2O = 3.00 moles
Step 4: Calculate moles O2
For 2 moles H2 we need 1 mol O2 to produce 2 moles H2O
For 3.00 moles H2O we need 3.00/2 = 1.50 moles O2
Step 5: Calculate mass O2
Mass O2 = moles O2 * molar mass O2
Mass O2 = 1.50 moles * 32.0 g/mol
Mass O2 = 48.0 grams
The total number of grams of O2 is 48.0 grams (option B)