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s344n2d4d5 [400]
3 years ago
12

Compare the density of the he atom with that of pure water, which is 1.0 g/cm3.

Chemistry
1 answer:
makkiz [27]3 years ago
3 0
At room temperature, water is liquid in form. For helium, it is gas because it is the second lightest element in nature. So, you would expect the density of Helium to be much less than 1 g/cm³. Because gas is very light and occupies a lot of space, the density would result to a very small number.
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How is 8.2 x 10^4 - 6.3 x 10^3 written in scientific notation
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Answer:

= 7.57 × 104

(scientific notation)

= 7.57e4

(scientific e notation)

= 75.7 × 103

(engineering notation)

(thousand; prefix kilo- (k))

Explanation:

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3 years ago
Which of these is a covalent compound?
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A. NO2 because the elements are both nonmetals.
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The backbone of nucleic acids consists of
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Answer:

c. a phosphodiester bond between the 3' and 5' hydroxyl groups of neighboring sugars

Explanation:

Phosphodiester bond is the bond which is formed between the hydroxyl group of one nucleotide to the phosphate group of the another nucleotide. These are ester bonds. These bonds are central to all the life which is in existence on Earth. These bonds forms the backbone of the strands of the nucleic acid.

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4 0
3 years ago
What does the symbol (s) represent when it is next to an atom?
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Answer:

The symbol for an atom indicates the element via its usual two letter symbol, the mass number as a left superscript, the atomic number as a left subscript (sometimes omitted), and the charge as a right superscript.

Explanation:

I hope that helps!! sorry if it dont!

8 0
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When you put aspirated spinach leaf disks in a beaker of sodium bicarbonate and place them in different colors of light, some di
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The release of O₂( oxygen) from the process of photosynthesis is what made them to be able to float.

<h3>What is Photosynthesis?</h3>

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3 0
1 year ago
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