3 years ago

Please help me with number 43

Chemistry

1 answer:

Lana71 [14]3 years ago

8 0

Answer:

The reason why atomic mass is usually not a whole number is because it is a weighted average of the mass numbers of isotopes

Explanation:

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If my primary DNA strand is ATACCGCAA <br> a write the complimentary DNA strand

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Answer:

TATGGCGTT

Explanation:

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C-G

Use the other letter for complimentary strands

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3 years ago

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Which of the following is an incorrect way of rearranging the density formula:

goldenfox [79]

We know that density = mass /volume
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Explanation:

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1 year ago

storchak [24]

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3 years ago

At 7 degrees Celsius the volume of gas is 49 liters. At the same pressure its volume is 74 mL at what temperature

Romashka-Z-Leto [24]

Charle's law gives the relationship between volume and temperature of gas.
It states that at constant pressure, volume of gas is directly proportional to temperature of gas.
V/T = k
where V - volume , T - temperature and k- constant
$\frac{V1}{T1} = \frac{V2}{T2}$
parameters for the first instance are on the left side of the equation and parameters for the second instance are on the right side of the equation
T1 - 7 °C + 273 = 280 K
substituting these values in the equation
$\frac{49 mL}{280K} = \frac{74 mL}{T}$
T = 423 K
temperature in Celcius scale - 423 K - 273 = 150 °C

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3 years ago