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jenyasd209 [6]
3 years ago
15

How do you know what numbers in a chemical formula are significant

Chemistry
1 answer:
bulgar [2K]3 years ago
3 0

Answer:

All the numbers in a chemical formula are significant, It is because the numbers in a chemical formula denote the number of different atoms present in the particular compound.

For example in H2SO4 there are 2 H 1 S and 4 O. This means 1 H2SO4 has 2 hydrogen 1 sulphur and 4 oxygen.

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An engineering company needs to solve a design problem. It is designing a high-speed train to transport passengers between Bosto
gregori [183]

Answer:

d

Explanation:

5 0
3 years ago
Which amino acid chain will be formed by the codons shown below? aag aga ugu?
notsponge [240]
The amino acid chain will be; Lysine-Arginine-Cysteine 
Amino acids are the building block of proteins, many amino acid molecules make up polypeptide chains which form proteins. Each amino acid is coded by a specific codon during the process of translation. A codon consists of three nucleotide bases. In this case AAG codes for amino acid Lysine, while AGA codes for Arginine and UGU codes for amino acid Cysteine.
3 0
4 years ago
Calculate the energy required to heat 406.0mg of cyclohexane from 33.5°C to 38.9°C . Assume the specific heat capacity of cycloh
N76 [4]

Answer:

Q = 4.056 J

Explanation:

  • Q = m<em>C</em>ΔT

∴ m = 406.0 mg = 0.406 g

∴ <em>C </em>= 1.85 J/g.K

∴ T1 = 33.5°C ≅ 306.5 K

∴ T2 = 38.9°C = 311.9 K

⇒ ΔT = 311.9 - 306.5 = 5.4 K

⇒ Q = (0.406 g)(1.85 J/gK)(5.4 K)

⇒ Q = 4.056 J

6 0
3 years ago
How many molecules are in 4.0 moles of propane (C3H8)
Lapatulllka [165]

Answer:

2.408x10^24 molecules

Explanation:

1mole of a substance contains 6.02x10^23 molecules.

This means that 1mole of C3H8 contains 6.02x10^23 molecules.

Therefore, 4moles of C3H8 will contain = 4 x 6.02x10^23 = 2.408x10^24 molecules

5 0
3 years ago
1. Which of these is NOT found in the nucleus of an atom?
grandymaker [24]

Answer:

Electrons

Explanation:

7 0
3 years ago
Read 2 more answers
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