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2 years ago

11

How would I find the number of protons, neutrons and electrons when I only have the atomic number and atom (assignment says assu

me the net charge is 0)

1 answer:

coldgirl [10]2 years ago

8 0

Explanation:

Atomic number , protons and electrons have the same value / their value is same .

But for the neutron there is no specific technique. You have to remember the neutrons of every element

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What is 0.00550 g converted to mg

Mila [183]

Answer: it is 5.5 mg

Explanation:

you have to multiply the mass value by 1000

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2 years ago

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3 years ago

A 2.3 kg object has 15 ) of kinetic energy. Calculate its speed.

chubhunter [2.5K]

Answer:

<h3>The answer is option D</h3>

Explanation:

To find the speed given the kinetic energy and mass we use the formula

$v = \sqrt{ \frac{2KE}{m} } \\$

where

m is the mass

v is the speed

From the question

KE = 15 J

m = 2.3 kg

We have

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We have the final answer as

<h3>3.6 m/s</h3>

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3 years ago

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alekssr [168]

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2 years ago

Estimate the molar mass of a gas that effuses at 1.6 times the effusion rate of CO2

Vlada [557]

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r1/r2 = √(m2/m1)

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r1 = 1.6r2

1.6 = √(44.01 / m1)
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2 years ago