The molar mass of Zinc is 65.38 u
Hope this helps :)
In this checmical reaction there is a transfer of electrons between two species. So the option you are looking for is c. Remember that in this reaction the oxidation number of a molecule changes because gains or looses electrons
X(OH)₂ + 2HCl = XCl₂ + 2H₂O
n{X(OH)₂}=m{X(OH)₂}/M{X(OH)₂}
n(HCl)=c(HCl)v(HCl)
n{X(OH)₂}=n(HCl)/2
m{X(OH)₂}/M{X(OH)₂}=c(HCl)v(HCl)/2
M{X(OH)₂}=2m{X(OH)₂}/{c(HCl)v(HCl)}
M{X(OH)₂}=2*8.65/{2.50*56.9*10⁻³}=121.6 g/mol
M(OH)=17.0 g/mol
M(X)=121.6-17.0*2=87.6 g/mol ⇒ X=Sr, strontium
Sr(OH)₂ + 2HCl = SrCl₂ + 2H₂O
I think this is true because they’re in the same layer, strata which would mean they died around the same time. Hope this helps sorry if it’s wrong!
Answer:
Details of true/false statements are given below.
Explanation:
The rate law is deduced directly from the coefficients of the overall reaction. False
The rate equation for this mechanism is rate = k [O][ClO]. ClO(g) is an intermediate formed in this reaction mechanism. True
Step 2 of the mechanism is a bimolecular. True
The sum of the two steps is equal to the overall reaction: O(g) + O3(g) → 2O2(g). True
Cl(g) is a catalyst in this reaction mechanism. True