D is the correct answer. Chemical reaction rates won't always be constant, you can change the rate of a chemical reaction. Factors that affect chemical reaction rates would be temperature, the concentration (pressure) of the reactant, or just the general surface area (crushing a reactant would be an example). Solvent polarity can also decrease the rate of a chemical reaction. Therefore, A, B, and C are true, leaving D as the answer.
Strontium has two valence electrons to donate while Oxygen requires two electrons to complete its octet. Therefore, one strontium atom will bind with one Oxygen atom. The formula will be SrO
answer is compound i think
Explanation:
The equation MgO + 2HCl → MgCl₂ + H₂O is a balanced equation.
- A balanced chemical equation contains equal number of atoms on both sides of the equation.
- The equation is MgO + 2HCl → MgCl₂ + H₂O which contains 1 atom of Mg, 2 atoms of chlorine, 2 atoms of chlorine, 1 atom of oxygen on both reactants and products sides.
- So the equation is balanced.
- An equation for a chemical reaction is said to be balanced if both the reactants and the products have the same number of atoms and total charge for each component of the reaction.
- In other words, both sides of the reaction have equal amounts of mass and charge.
- It follows law of conservation of mass.
- Mass is neither created nor destroyed rather it can be transferred from one form to another.
Learn more about balanced equation at:
brainly.com/question/2829417
#SPJ9
70.0 g. The decomposition of 125 g CaCO3 produces 700 g CaO.
MM = 100.09 56.08
CaCO3 → CaO + CO2
Mass 125 g
a) Moles of CaCO3 = 125 g CaCO3 x (1 mol CaCO3/100.09 g CaCO3)
= 1.249 mol CaCO3
b) Moles of CaO = 1.249 mol CaCO3 x (1 mol CaO/1 mol CaCO3)
= 1.249 mol CaO
c) Mass of CaO = 1.249 mol CaO x (56.08 g CaO/1 mol CaO) = 70.0 g
