26. Classify each chemical equation as a combination/synthesis , decomposition, single replacement, double replacement, or combu
stion.
a. Pb(s) + Hg2SO4(s) PbSO4(s) +2 Hg(l)
b. NaCl(aq) + AgNO3(aq) AgCl(s) + NaNO3(aq)
c. 2 H20(l)2 H2(g) + 02(g)
27. Find the molar mass of nitric acid (HNO3).
28. Avogadro’s number refers to ___.
a. the maximum number of electrons that all of an atom’s energy levels can accommodate
b. the number of protons and neutrons that can fit in the shells of an atom’s nucleus
c. the number of particles in one mole of a substance
d. the number of particles in exactly 1.0 g of a substance
29. How many moles of oxygen atoms are in 1.5 moles of CO2? (Sc2c)
a. 1 mol b. 1.5 mol c. 2 mol d. 3 mol
30. What is the mass of 0.28 mol of iron ?
a. Pb(s) + Hg2SO4(s) PbSO4(s) +2 Hg(l)
b. NaCl(aq) + AgNO3(aq) AgCl(s) + NaNO3(aq)
c. 2 H20(l)2 H2(g) + 02(g)
27. Find the molar mass of nitric acid (HNO3).
28. Avogadro’s number refers to ___.
a. the maximum number of electrons that all of an atom’s energy levels can accommodate
b. the number of protons and neutrons that can fit in the shells of an atom’s nucleus
c. the number of particles in one mole of a substance
d. the number of particles in exactly 1.0 g of a substance
29. How many moles of oxygen atoms are in 1.5 moles of CO2? (Sc2c)
a. 1 mol b. 1.5 mol c. 2 mol d. 3 mol
30. What is the mass of 0.28 mol of iron ?
1 answer:
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Answer:
So, Luke and Sian has to increase the pH of the soil by adding base to it.
Explanation:
The pH is defined as the negative logarithm of the hydrogen ion concentration in their aqueous solution.
- With increase in hydrogen ion concentration the pH value decreases.
- With decrease in hydrogen ion concentration the pH value increases.
The pH of the soil after testing it on a kit comes out be 5.0, but they both need pH of the soil to 6.5.
Comparison of pH of soil:
= 5.0 < 6.5
= High hydrogen ion concentration > High hydrogen ion concentration
So, Luke and Sian has to increase the pH of the soil by adding base .Doing so will decrease the hydrogen ion concentration in the soil (where as addition of acid lower the pH of soil).
Answer:
Most substituted alkene is produced as a major product
Explanation:
- Dehydration of 3-methyl-2-butanol proceeds through E1 mechanism to form alkenes.
- Most substituted alkene is produced as major product because of presence of highest number of hyperconjugative hydrogen atoms corresponding to the produced double bond (Saytzeff product).
- Here, a H-shift also occurs in one of the intermediate step during dehydration to produce more stable tertiary carbocation.
- Reaction mechanism has been shown below.
