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Zolol [24]
3 years ago
7

A mole of hydrogen atoms has 6.02 x 10^23 atoms. It occupies 22.414 L. How many hydrogen atoms are in 50.00 mL?

Chemistry
1 answer:
Greeley [361]3 years ago
3 0

Answer:

This is a simple case of ratios. (1 mol)/(22.4 L)=(n mol)/(.025 L) Then we cross multiply and we get 22.4n=.025 We divide each side by 22.4 to find n=.001116 mol Then to convert the moles to atoms we multiply, and cross-cancel the units (.001116 mol)/1 xx (6.02 xx 10^23 atms)/(1 mol) and we have 6.72 xx 10^20 atoms.  I've found the trick of cross-cancelling units to be a very effective mnemonic, it always makes sure you carry out the correct calculation to find the desired units.

Explanation:

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19) What is the molarity of a KOH solution if 200 ml of the solution contains 0.6 moles KOH?
zloy xaker [14]

Answer: 3M

Explanation: Molarity : It is defined as the number of moles of solute present in one liter of solution.

Formula used :

Molarity=\frac{n\times 1000}{V_s}

where,

n = moles of solute KOH = 0.6 moles

V_s = volume of solution in ml= 200 ml

Now put all the given values in the formula of molarity, we get

Molarity=\frac{0.6moles\times 1000}{200ml}=3mole/L

Therefore, the molarity of solution will be 3M.

8 0
3 years ago
Read 2 more answers
If more sugar were added to the solution on the left side of the tube, what would happen to the water level on the right side of
Vesna [10]

The given question is incomplete. The complete question is as follows.

If more sugar were added to the solution on the left side of the tube, what would happen to the water level on the right side of the tube?

  • There is more solute in the left arm of the tube than in the right arm of the tube.
  • There is less free water in the right arm of the tube than in the left arm of the tube.
  • Water is tightly clustered around the hydrophilic solute molecules on both sides of the membrane.
  • Solutes can pass through the selectively permeable membrane from right to left, but free water cannot.

Explanation:

It is known that when water is able to diffuse through a semi-permeable membrane from a region of high water concentration to low water concentration is called osmosis.

Since, more amount of solute is present on the right side of the tube so, there will be less amount of free water present over there as compared to the left side of the tube.

Also, water will be clustered around the hydrophilic solute molecules which is present on both sides of the membrane.

Thus, we can conclude that the true statements are as follows.

  • There is less free water in the right arm of the tube than in the left arm of the tube.
  • Water is tightly clustered around the hydrophilic solute molecules on both sides of the membrane.
5 0
3 years ago
What is the difference between a diatomic element and a compound
Solnce55 [7]

Diatomic

consist of two atoms bonded together. In contrast, monatomic elements consist of single atoms (e.g., Ar, He). Many compounds are diatomic, such as HCl, NaCl, and KBr. Diatomic compounds consist of two different elements. There are seven pure elements that form diatomic molecules.

Key Takeaways: Diatomic Elements

Diatomic elements are pure elements that form molecules consisting of two atoms bonded together.

There are seven diatomic elements: hydrogen, nitrogen, oxygen, fluorine, chlorine, iodine, bromine.

These elements can exist in pure form in other arrangements. For example, oxygen can exist as the triatomic molecule, ozone.

This is a list of the seven diatomic elements. The seven diatomic elements are:

Hydrogen (H2)

Nitrogen (N2)

Oxygen (O2)

Fluorine (F2)

Chlorine (Cl2)

Iodine (I2)

Bromine (Br2)

All of these elements are nonmetals, since the halogens are a special type of nonmetallic element. Bromine is a liquid at room temperature, while the other elements all gases under ordinary conditions. As the temperature is lowered or pressure is increased, the other elements become diatomic liquids.

Astatine (atomic number 85, symbol At) and tennessine (atomic number 117, symbol Ts) are also in the halogen group and may form diatomic molecules. However, some scientists predict tennessine may behave more like a noble gas.

While only these seven elements routinely form diatomic molecules, other elements can form them. However, diatomic molecules formed by other elements are not very stable, so their bonds are easily broken.

compounds

are formed by the chemical combination of two or more element. example water is a compound because two elements water and hydrogen come to form it.

7 0
3 years ago
*PLEASE HELP!*
horsena [70]
For number one the answer is A
8 0
3 years ago
Read 2 more answers
Translate this phrase into an algebraic expression.
Pavlova-9 [17]

Answer:

11j - 1

Explanation:

One less means we have to subtract the 1 from 11j or 11 x j.

3 0
3 years ago
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