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4 years ago

What do an atom ion and isotope have in common?

Chemistry

1 answer:

Elan Coil [88]4 years ago

7 0

They have the same number of protons in the nucleus.

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Element J is 1s 2s 2p 3s . (i) How many unpaired electrons does J have?

Mama L [17]

Answer:6

Explanation:

3+3

7 0

3 years ago

Water flows from the bottom of a large tank where the pressure is 100 psig through a pipe to a turbine which produces 5.82 hp. T

Marianna [84]

Explanation:

Bernoulli equation for the flow between bottom of the tank and pipe exit point is as follows.

$\frac{p_{1}}{\gamma} + \frac{V^{2}_{1}}{2g} + z_{1}$ = $\frac{p_{2}}{\gamma} + \frac{V^{2}_{2}}{2g} + z_{2} + h_{f} + h_{t}$

$\frac{(100 \times 144)}{62.43} + 0 + h[tex] = [tex]\frac{(50 \times 144)}{(62.43)} + \frac{(70)^{2}}{2(32.2)} + 0 + 40 + 60$

h = $\frac{(50 \times 144)}{(62.43)} + \frac{(70)^{2}}{2(32.2)} + 40 + 60 - \frac{(100 \times 144)}{(62.43)}$

= 60.76 ft

Hence, formula to calculate theoretical power produced by the turbine is as follows.

P = mgh

= $100 \times 60.76$

= 6076 lb.ft/s

= 11.047 hp

Efficiency of the turbine will be as follows.

$\eta_{t}$ = $\frac{P_{actual}}{P_{theoretical}}$ × 100%

= $\frac{5.82}{11.047} \times 100%$

= 52.684%

Thus, we can conclude that the efficiency of the turbine is 52.684%.

4 0

3 years ago

What is the value of all conversion factors that are used in dimensional analysis

IRISSAK [1]

All the conversions have a net value of 1

4 0

3 years ago

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Pretend that you are the size of an atom, observing a reaction between a potassium atom and a fluorine atom. Write an account of

Crazy boy [7]

<span>Each atom in an ionic compound tends either to empty or complete the shell to 8 electrons. So when the number of electrons on the external shell is near 8 , the atom tends to attract electrons to complete the shell giving a positive ion called anion
Conversely when the number of electrons is small the atom gives these electrons to form a positive ion called a cation</span>

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3 years ago

If a synthesis reaction takes place between rubidium and bromine, the chemical formula for the product is _____.

densk [106]

RbBr is your answer .-.

3 0

3 years ago

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