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mixas84 [53]
3 years ago
14

Hi, i need help.. please

Chemistry
1 answer:
11111nata11111 [884]3 years ago
5 0
4 because of the measurements and the figures starts from 0 to 40
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What is the molecular formula of a compound that is composed of 94.1% O and 5.9% H with a molar mass of 34g
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Answer:

B. 67.6/Hg(200.5)= .337. 10.8/S(32.1)= .336. 21.6/O(16)= 1.35--> .337/.336= 1 .336/.336= 1 1.35/.336= 4. Formula= HgSO4

Explanation:

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3 years ago
A pea plant has two dominant alleles for plant height – tall. We say that this plant is?:
Irina-Kira [14]
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Explain the composition of dna nucleotides and the structure of the dna molecule need help
Kaylis [27]

A nucleotide is composed of a phosphate group, sugar, and nitrogen base. DNA is made of 2 strands of nucleotides linked together by covalent bonds between the phosphate and sugar of each nucleotide. The strands of nucleotides are linked together by hydrogen bonds creating DNA. Hope this helps and sorry if I made a mistake.

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3 years ago
A scientist wants to make a solution of tribasic sodium phosphate, Na3PO4, for a laboratory experiment. How many grams of Na3PO4
san4es73 [151]

Answer:

83.20 g of Na3PO4

Explanation:

1 mole of Na3PO4 contains 3 moles of Na+.

Mole of Na ion to be prepared = Molarity x volume

                 = 0.700 x 725/1000

                     = 0.5075 mole

If 1 mole of Na3PO4 contains 3 moles of Na ion, then 0.5075 Na ion will be contained in:

           0.5075/3 x 1 = 0.1692 mole of Na3PO4

mole of Na3PO4 = mass/molar mass = 0.1692

Hence, mass of Na3PO4 = 0.1692 x molar mass

                                     = 0.1692 x 163.94

                                        = 83.20 g.

83.20 g of Na3PO4 will be needed.

3 0
3 years ago
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Hydrogen and nitrogen react to produce ammonia gas as shown in the following chemical
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Explanation:

31.5 \: g \: aommnia \:  \times  \:  \frac{1 \: mol \: ammonia}{8 \: g \: ammonia \: } \:  \times  \frac{3 \: mol \: hydrogen}{2 \: mol \: ammonia} \:  \times  \frac{1 \: g \: hydrogen}{1 \: mol \: hydrogen}  =  \: 5.90625 \: g \: hydrogen \: must \: react \:

5 0
3 years ago
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