Ask question

Ask question

All categories

3 years ago

11

Fill in the Blanks :

1 answer:

MariettaO [177]3 years ago

8 0

Answer:

Explanation:

1. Mass number

2. Protons

3. Electrons

You might be interested in

Describe what golgi looks like.

Margaret [11]

Here is what Golgi looks like, so that you can look at the picture and describe it.
______________________________________________________________
____________________________________________________________________________________________________________________________

Glad I could help, and good luck!
-----------------------------------------
------------------------------------------
------------------------------------------

7 0

3 years ago

Determine the molality of a solution of methanol dissolved in ethanol for which the mole fraction of methanol is 0.135. Give you

Alja [10]

<u>Answer:</u> The molality of the solution is 0.11 m

<u>Explanation:</u>

We are given:

Mole fraction of methanol = 0.135

This means that 0.135 moles of methanol is present in 1 mole of a solution

Moles of ethanol = 1 - 0.135 = 0.865 moles

To calculate the mass for given number of moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$

Moles of ethanol = 0.865 moles

Molar mass of ethanol = 46 g/mol

$0.865mol=\frac{\text{Mass of ethanol}}{46g/mol}\\\\\text{Mass of ethanol}=(0.865mol\times 46g/mol}=39.79g$

To calculate the molality of solution, we use the equation:

$Molality=\frac{m_{solute}\times 1000}{M_{solute}\times W_{solvent}\text{ (in grams)}}$

Where,

$m_{solute}$ = Given mass of solute (methanol) = 0.135 g

$M_{solute}$ = Molar mass of solute (methanol) = 32 g/mol

$W_{solvent}$ = Mass of solvent (ethanol) = 39.79 g

Putting values in above equation, we get:

$\text{Molality of methanol}=\frac{0.135\times 1000}{32\times 39.79}\\\\\text{Molality of methanol}=0.106m\approx 0.11m$

Hence, the molality of the solution is 0.11 m

6 0

3 years ago

How many oxygen atoms in 1 mole of CO2

Romashka-Z-Leto [24]

There are two oxygen atoms

8 0

3 years ago

Read 2 more answers

According to Newton's first law of motion what is required to make an object at rest move

yanalaym [24]

<span>An object at rest will stay at rest unless acted upon by a unbalanced force.

</span>

8 0

3 years ago

Read 2 more answers

Which of the following is true about the differences between the "Plum Pudding" model and Rutherford's model? There are two poss

Ugo [173]

I think it is the letter A because they both Make sense

7 0

3 years ago