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strojnjashka [21]
2 years ago
6

Cho 2.3 gam natri vào 100ml nước . Tính nồng độ dung dịch thu được ( C% )

Chemistry
1 answer:
Anton [14]2 years ago
8 0

Answer:

maybe speak in english than we can understand and help you sorryy

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When one atom contributes both bonding electrons in a single covalent bond, the bond is called a(n) ____?
andre [41]
Coordinate covalent bond 
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3 years ago
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During translation, the new polypeptides are often directed to specific parts of the cell by the presence or absence of short se
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The correct option is b. an amino-terminal signal

Explanation:

A polypeptide that will eventually fold to become an ion channel protein, it means a kind of integral membrane protein, has an amino terminal signal that indicates its delivery to endoplasmic reticulum (ER) and then to the membrane. This type of signal usually consist in a nucleus of 6 to 12 aminoacids and one or more basic aminoacids. Once the polypeptide enters the ER, this signal is removed.

6 0
2 years ago
20.00 g of aluminum (al) reacts with 78.78 grams of molecular chlorine (cl2) all of each reactant is completely consumed and a s
marysya [2.9K]

The mass of the product is <em>98.78 g.</em>

The word equation is

aluminum + chlorine → product

20.00 g + 98.78 g → <em>x</em> g

If each reactant is completely consumed, the <em>Law of conservation of Mass </em>tells us the mass of the product must be 98.78 g.

8 0
3 years ago
What is the mass of 1.2 x 1023 atoms of arsenic?
Gre4nikov [31]

Answer:

14.93 g

Explanation:

First we <u>convert 1.2 x 10²³ atoms of arsenic (As) into moles</u>, using <em>Avogadro's number</em>:

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Then we can<u> calculate the mass of 0.199 moles of arsenic</u>, using its<em> molar mass</em>:

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Thus, 1.2x10²³ atoms of arsenic weigh 14.93 grams.

6 0
3 years ago
What are different type of plastids explain them?​
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Explanation:

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2) Chromoplasts:-The coloured plastids for pigment synthesis and storage.

3) Leucoplasts:- The colourless plastids for monoterpene synthesis found in non- photosynthetic parts of the plants.

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b) Proteinoplasts-  stores proteins.

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6 0
3 years ago
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