MgSO₄ + Pb(NO₃)₂ = PbSO₄(s) + Mg(NO₃)₂
Mg²⁺ + SO₄²⁻ + Pb²⁺ + 2NO₃⁻ = PbSO₄ + Mg²⁺ 2NO₃⁻
Pb²⁺ + SO₄²⁻ = PbSO₄
- Answer:
Energy release is exothermic reaction whiles energy absorb is endothermic reaction
Explanation:
Exothermic reaction is when the reactant is above the product while endothermic the product is below the reactant in the diagrams we have some part as activation energy
Answer: we learned this not to long ago i think its a,c
Explanation:
C. The cheetah population will decrease because if there are more leopards then that means there will be less food for both species to eat therefore one of the population of the cheetahs will decrease.
Answer:
The element is carbon because the atomic mass of carbon is 12.
Explanation:
Abundance of x¹² = 98.9%
Abundance of x¹³ = 1.1%
Atomic mass of x¹² = 12 amu
Atomic mass of x¹³ = 13 amu
Average atomic mass = ?
Solution:
Average atomic mass of x= (abundance of 1st isotope × its atomic mass) +(abundance of 2nd isotope × its atomic mass) / 100
Average atomic mass of x = (12 ×98.9)+(13 ×1.1) /100
Average atomic mass of x = 1186.8 + 14.3 / 100
Average atomic mass of x = 1201.1/ 100
Average atomic mass of x = 12.01 amu.
The element is carbon because the atomic mass of carbon is 12.
