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algol [13]
2 years ago
8

The nutritional recommended daily allowance (rda) of calcium is 1,300 mg for a 9-18-year-old. How many grams is this? How many a

toms of calcium is this?​
Chemistry
1 answer:
Simora [160]2 years ago
6 0

Answer:

1.3 grams and I think the atoms of calcium is 7, 829. 9

Explanation:

hope this helps!

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zepelin [54]

Answer:

geologic features like craters and mountains

Explanation:

8 0
2 years ago
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Using the balanced reaction below, drag and drop the terms into the correct location to solve the following problem:
k0ka [10]

Answer:

4.5 moles of H2O.

Explanation:

We'll begin by writing the balanced equation for the reaction. This is illustrated below:

C2H5OH + 3O2 —> 2CO2 + 3H2O

From the balanced equation above,

1 moles of C2H5OH reacted to produce 3 moles of H2O.

Finally, we shall determine the number of mole of H2O produced by the reaction of 1.5 moles of C2H5OH. This can be obtained as follow:

From the balanced equation above,

1 moles of C2H5OH reacted to produce 3 moles of H2O.

Therefore, 1.5 moles of C2H5OH will react to produce = 1.5 × 3/ 1 = 4.5 moles of H2O.

Thus, 4.5 moles of H2O will be produced.

6 0
3 years ago
Sometimes a nuclide is referenced by the name of the element followed by the:______
wolverine [178]

Answer:

The correct option is d

Explanation:

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6 0
3 years ago
In a mixture of He, Ne, and Kr the total pressure is 125 kPa. The partial
tatiyna

Answer:

Partial pressure of He = 73 kPa

Explanation:

Given:

Total pressure = 125 kPa

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Partial pressure of Kr = 21 kPa

Find:

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Computation:

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125 kPa = 31 kPa + 21 kPa + Partial pressure of He

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7 0
3 years ago
Why is there not a corresponding drop in ionization energies between Bi and Po in the sixth period as N and O?
Stels [109]

Answer:

See explanation

Explanation:

According to the Journal of Chemical Education, Volume 80, No.8 (2003); "The first ionization energy of bismuth appears to be  anomalous......It has been claimed that spin– orbit coupling by the Russell–Saunders scheme would lower  the ground state of Bi+ ..."

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The same argument could be extended to explain the reason why  there not a corresponding drop between Ba and Tl is the sixth period even though they are in the same group as Be and B.

3 0
2 years ago
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