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VikaD [51]
3 years ago
14

What is 0.00000005 in scientific notation, rounded to two significant figures?

Chemistry
1 answer:
KIM [24]3 years ago
7 0

Answer:

5×-10^8

That is the the scintific notation for 0.00000005

Answer=5×-10^8

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State the periodic law, and explain its relation to electron configuration. (Use Na and K in your explanation.)
mina [271]

Answer:

Explanation:

The period law state that when elements are listed in order of their atomic numbers, the elements fall into recurring groups, so that there is a recurrence of similar properties at regular intervals.

Na and K in the periodic table fall into the same group, this is because they both have one electrons in their outermost shell.

Na 11 -1s2 2s2 2p6 3s1

K 19 - 1s2 2s2 2p6 3s2 3p6 4s1

They share similar chemical and physical properties. Na and K are very reactive metals, they can loose/donate their outermost electron to non metals in other to attain stable octet state.

The form ionic compound when they react with non metals.

5 0
3 years ago
Calculate how much carbohydrate a 175-pound athlete who is in training 4-5 hours per day should eat each day in order to enhance
Kamila [148]

Answer:

The athlete should consume about 476 g of carbohydrates per day to maintain a good storage of glycogen in his body

Explanation:

For an athlete who trains daily, 5 to 7 g of carbohydrates per Kg of body weight per day is recommended;

∴ m athlete = (175 Lb)×(0.453592 Kg/Lb) = 79.3787 Kg

⇒ m carbohydrate = (79.3787 Kg)×( 6 g carbohydrate/ Kg.day) = 476.27 g carbohydrate/day

5 0
3 years ago
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8 0
4 years ago
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A gaseous mixture of 1.0 mol of 12 and 1.0 mol of H2 was placed in an empty vessel that has a
dezoksy [38]

Answer:

See detailed explanation.

Explanation:

Hello!

In this case, for the reaction:

I_2+H_2\rightleftharpoons 2HI

It is known that the equilibrium constant tends to be greater than 1; therefore, it is a reaction that tends to go rightwards towards the formation of hydrogen iodide.

a) Here, since the reaction tends to form the product, it is clear that the initial concentration of iodine and hydrogen will decrease as the reaction reaches equilibrium in order to increase the concentration of hydrogen iodide.

b) Yes, it stops at the point in which the following expression:

\frac{[HI]^2}{[I_2][H_2]}

Equals the equilibrium constant.

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3 years ago
Mickey notices that his dog Pluto is suffering from fleas which causes his hair to fall out. His friend Goofy tells him that rub
dsp73

Answer:

rubbing dogs with cabbage will get rid of fleas.

Explanation:

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3 years ago
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