Answer:
B: Na(s) + Cl2(g) + 3O2(g) = 2NaClO3(s)
Explanation:
We are looking for enthalpy of formation, so we want to see reactance in their natural standard form.
Thus, we want to see the reactance of Na, Cl2 and O2.
The only option that has the correct form of Na, Cl2 and O2 is B.
Na(s) + Cl2(g) + 3O2(g) = 2NaClO3(s)
Mixtures:
physically combined
components retain properties
compounds:
chemically combined
components change properties
both:
made of elements
variable proportions
fixed properties
2 or more compounds
hope this helps
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Answer:
The molarity is 90 M
Explanation:
Molarity is a measure of concentration that indicates the amount of moles of solute (in this case CaCl2) in 1 liter of solution (1000ml). In this case we calculate it that way:
200 ml solution ------18 mol CaCl2
1000ml solution----------x= (1000ml solutionx18 mol CaCl2)/200 ml solution
x=<em>90 mol CaCl2---> the solution is 90 M</em>
Answer:
i think it's D tbh, just cus it was the scientist who did the work
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