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2 years ago

How long does it take an object to travel 50m at a rate of 8 m/s?

Chemistry

1 answer:

Harman [31]2 years ago

7 0

Answer:

6.25s

Explanation:

time = distance / speed

time = 50 / 8

time = 6.25s

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The table below shows the number of sub-atomic particles in an atom of magnesium.

Fittoniya [83]

Answer:

Explanation:

7 0

3 years ago

What is the empirical formula of a compound that contains 25.92 percent nitrogen and 74.07 percent oxygen?

pychu [463]

N2O5

Explanation!

When given %, assume you have 100 g of the substance. Find moles, divide by lowest count. In this case you'll end up with

25.92 g N14.01 g N/mol N=1.850 mol N

74.07 g O16.00 g O/mol O=4.629 mol O

The ratio between these is 2.502 mol O/mol N, which corresponds closely with N2O5.

4 0

3 years ago

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Which is the best example of translate translational motion

RoseWind [281]

The correct answer would be A) A soccer ball passed between two players because the ball is in motion.

6 0

3 years ago

When PCl5 solidifies it forms PCl4+ cations and PCl6– anions. According to valence bond theory,

rewona [7]

Hey there!

No of hybrid orbitals , H = ( V +S - C + A ) / 2

Where H = no . of hybrid orbitals

V = Valence of the central atom = 5

S = No . of single valency atoms = 4

C = No . of cations = 1

A = No . of anions = 0

For PCl4 +

Plug the values we get H = ( 5+4-1+0) / 2

H = 4 ---> sp3 hybridization

sp3 hybrid orbitals are used by phosphorous in the PCl4+ cations

Answer C

Hope that helps!

3 0

3 years ago

Need help with 22 and 24

choli [55]

Answer:

22:

Formular:

$atomic \: mass = \frac{ \sum(isotopic \: mass \times \%abundance)}{100} \\$

substitute:

$atomic \: mass = \frac{(23.985 \times 78.70) + (24.986 \times 10.13) + (25.983 \times 11.17)}{100} \\ \\ = \frac{(1887.620) + (253.108) + (290.230)}{100} \\ \\ = \frac{2430.958}{100} \\ \\ { \boxed{ \boxed{average \: atomic \: mass = 24.3 \: amu}}}$

23:

Same element is represented by same number of protons. 

Answer:

6 protons. 6 protons

7 neutrons. 8 neutrons

6 electrons. 6 electrons

Note: Atoms with same proton number but different mass number are called isotopes

5 0

3 years ago

Read 2 more answers