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r-ruslan [8.4K]
3 years ago
10

Which of the following contains the most atoms?

Chemistry
2 answers:
aksik [14]3 years ago
8 0

Explanation:

9.0122 g be Maybe, sorry i don't think so

zhannawk [14.2K]3 years ago
4 0

Answer:

The answer is 39.098

Explanation:

Using the peridic table.

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A solution with a ph of 6 has ________ times _________ oh- than a solution with a ph of 10.
Mila [183]
Answer would be... has  10 x^{-6- (-10)}= 10 x^{4} times concentration OH-
3 0
3 years ago
What is the total number of moles present in a 526.0-gram sample of NaNCO3(s)?
dedylja [7]

Answer:

5.42 mol

Explanation:

To find moles, divide the given mass by the compounds molar mass. To find the molar mass of the compound, add of the masses of each individual component:

Molar mass of NaNCO3 = Na + N + C + (O x 3)

Molar mass of NaNCO3 = 23 + 14 + 12 + (16 x 3)

Molar mass of NaNCO3 = 97 g/mol

Moles = mass / molar mass

Moles = 526 g / 97 g/mol

Moles = 5.42 mol

3 0
3 years ago
How many ruthenium atoms can you line up across across the tip of a finger that is 3.6 cm in length. A ruthenium atom has an ave
Fofino [41]

Answer:

1.0 × 10⁸ ruthenium atoms

Explanation:

Step 1: Calculate the diameter (d) of an atom of ruthenium

The diameter of an atom is twice its radius.

d = 2 × r = 2 x 178 pm = 356 pm

Step 2: Convert "d" to meters

We will use the conversion factor 1 m = 10¹² pm.

356 pm × 1 m/10¹² pm = 3.56 × 10⁻¹⁰ m

Step 3: Convert the distance of the tip of a finger (D) to meters

We will use the conversion factor 1 m = 10² cm.

3.6 cm × 1 m/10² cm = 0.036 m

Step 4: Calculate the number of atoms of ruthenium required

We will use the following expression.

D/d = 0.036 m/3.56 × 10⁻¹⁰ m = 1.0 × 10⁸

4 0
3 years ago
What is the meaning of chemistry
oksano4ka [1.4K]
Chemistry is a subject of love❤❤❤❤❤
3 0
3 years ago
9.(02.02 MC)
den301095 [7]

Answer:

Example A describes a physical change and Example B describes a chemical change.

Explanation:

Physical Change                                                                                              

The changes that occur only due to change in shape or physical properties but their chemical or internal composition remain unchanged.  

These changes were reversible.

They have same chemical property.

These changes can be observed with naked eye.

Example :

Vegetables are chopped and converted into smaller pieces the composition remain same. It is physical change.

Water converting to Ice

Water converting to gas

In this water molecule remain the same only they rearrange themselves that change its state of mater not composition

Chemical change:

The changes, that occur due to change in the composition of a substance and result in a different compound is known as chemical change.

These changes are irreversible

These changes occur due to chemical reactions

These may not be observed with naked eye

Example:

Combustion of fuel or wood: that oil or wood convert into energy, CO2 and ash in case of wood

Boiling of egg: that change the chemical composition of protein in the egg .

Food is broken up into simpler form during digestion and convert into the energy and particles which are different from original compound .

4 0
3 years ago
Read 2 more answers
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