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stiks02 [169]
3 years ago
14

What can you infer about copper and silver based on their position relative to each other

Biology
1 answer:
IRINA_888 [86]3 years ago
5 0
They are both metals

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2. The mass of the nucleus is closest to A. 99% of that in the entire atom B. 1% of that in the atom C. 10–5 of that in the atom
Tanzania [10]

Answer: Option A) 99% of that in the entire atom

Explanation:

An atom consists of three subatomic particles named protons, neutrons and electrons. The protons and neutrons are found in the nucleus of the atom, while the mass of electrons is 1/1840 (negligible).

Thus, the mass of protons and neutrons in the nucleus makes 99% of the entire atom

3 0
3 years ago
Na + Cl2 --> NaCl if you were given 15 grams of sodium (with excess chlorine) and asked to determine the amount of NaCl that
Elena-2011 [213]

Answer:

The correct answer is - 38.15 gm of NaCl.

Explanation:

Write the balanced equation for this reaction of sodium (Na) and chlorine (Cl₂) to produce sodium chloride (NaCl):

2Na + Cl₂ —> 2NaCl

the mass of Na and the mass of NaCl :

Molar mass of Na = 23 g/mol

In the balanced equation = 2 × 23 = 46 g

Molar mass of NaCl = 23 + 35.5

= 58.5 g/mol

similarly in balanced equation = 2 × 58.5 = 117 g

From the balanced equation above,

46 g of Na reacted to produce 117 g of NaCl.

By converting it to 15 grams of Na.

Therefore,15 g of Na will react to produce = (15 × 117)/46 = 38.15 g of NaCl.

Thus, 38.15 g of Na

4 0
2 years ago
The first organisms on Earth were able to transform the carbon dioxide in the air into what essential element needed for modern
Len [333]
D. Oxygen  
We wouldn't be here without it
4 0
3 years ago
Read 2 more answers
Kac tane doku vardir
koban [17]

Answer:

I think you may have spelled it wrong

Explanation:

3 0
2 years ago
What type of molecule is produced by the ribosome?
-Dominant- [34]

Answer:

The correct answer is - C. protein.

Explanation:

Ribosomes are biological molecules that are made up of RNA and proteins. These molecules produce protein molecules with the help of mRNA by the process of translation. These molecules are called the factory of protein or protein synthesis site.

The RNA that is present in these molecules is ribosomal RNA. These are attached to the other cell organelles called endoplasmic reticulum used the protein to check and modify them.

8 0
3 years ago
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