6.023*1023 He atoms=1 mole He
1.23×1024 helium atoms=1.23×1024/6.023*1023 =2.042 mole He
one mole He=4.0 gm
2.042 mole He=2.042*4.0=8.168 gm
answer in grams of Helium is 8.168 gm
Answer:
Explanation:
The equation tells you that for every mol of H2 you need 2 mols of Na to get it.
1 H2 / 4 mols H2 = 2 mols Na / x Cross multiply
1*x = 4 * 2
x = 8 mol Na
Answer:
C. Trigonal planar
Explanation:
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In this case, according to the VSEPR theory, it is possible to realize that this molecule has three bonded atoms to the main carbon, one oxygen and two hydrogens. In addition, the aforementioned central carbon atom does not have any lone pairs, therefore, the molecular geometry for three bonded atoms and zero lone pairs would be trigonal planar.
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Amino Acids- To build proteins.
Hydrochloric Acids- Help humans digest foods.