2 years ago

What’s the answer to the top one? i’m not sure if i’m right tbh.

Chemistry

1 answer:

liberstina [14]2 years ago

6 0

The correct answer to the top one is d

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How many moles of nitrogen are in 2.0×10−2mole of quinine?

galben [10]

Answer: 4 x 10 ∧-2 moles of nitrogen.

Explanation:

The chemical formular for quinine is ; C20 H24 N2 O2

As can be seen from the chemical formular;

1 mole of quinine contains 2 moles of Nitrogen

Thus; 2.0 x 10 ∧-2 moles of quinine would contain

2.0 x 10 ∧-2 x 2 = 4 x 10 ∧-2 moles of nitrogen.

Therefore 4 x 10 ∧-2 moles of nitrogen are in 2.0×10−2mole of quinine

7 0

3 years ago

an element has a metallic gray appearance. it also has the properties of both a metal and a nonmetal. in which section of the pe

irinina [24]

If it has properties of metal and non metal it is considered a metalloid there are very few spots in which metalloids are located the spots I circled on a blank periodic tables are where the metalloids are located on an actual periodic table your only options are
boron(B) silicon(si) germanium(Ge) arsenic(As)antimony(Sb)tellurium(Te)astatine(At)those are the only places on the periodic table that has metalloids... I hope this helps