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Elza [17]
3 years ago
9

An atom which has 9 protons, 8 neutrons, and 9 electrons will have an atomic mass of how many amu?

Chemistry
1 answer:
rjkz [21]3 years ago
8 0

Answer:

D

Explanation:

Protons and Neutrons both have a mass of about 1 amu so you add them but electrons have a mass of 0 amu so they are left out.

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Fill out the chart below with things about the lion and tarantula that make them predators. Think of at least one trait that the
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the lion and the tarantula are both carnivores

the lion and the tarantula both live in hot dry places

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Lily replicates an experiment that found that the number of calories in a particular food is 50 kcal. She obtained data from
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invalid

Explanation:

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How many moles are in 6.3x1054 molecules of Ca(C2H202)2?
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3 years ago
How many molecules are in 10 moles of H2O ?​
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<h2>ANSWER:</h2>

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6 0
3 years ago
What will the volume of 254 cm3 of gas be at STP if its original temperature is 72.6° C?
juin [17]

Answer:

200.6cm³

Explanation:

Using Charles law equation as follows:

V1/T1 = V2/T2

Where;

V1 = initial volume (cm³)

V2 = final volume (cm³)

T1 = initial temperature (K)

T2 = final temperature (K)

According to the question;

initial volume (V1) = 254cm³

final volume (V2) = ?

Initial temperature (T1) = 72.6°C = 72.6 + 273 = 345.6K

Final temperature (T2) = 273K

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254/345.6 = V2/273

Cross multiply

345.6 × V2 = 273 × 254

345.6V2 = 69342

V2 = 69342 ÷ 345.6

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3 0
3 years ago
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