How many grams are in 2.40 mol of sodium chloride (NaCl)?

Answers

Answer 1

Answer: In this question, we are asked to convert from moles to grams.
We have 2.40 moles of NaCl.

We need the molar mass of NaCl. We can calculate this by referencing the periodic table and looking up the atomic weight.
Na = 22.99g
Cl = 35.45g
----------------
+ 58.44g

2.40 moles x (58.44grams) / (1 mole) = 140.26 grams of NaCl

There are 140.26 grams in 2.40 moles of NaCl.

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What are the functions of protein in organisms?

Answers

Proteins make up many many important structures in our cells ( ex : receptors , Enzymes , integral proteins and so on )

As a chemical reaction occurs, the thermometer in the container records an increase in temperature. What is true of the reaction? The reaction is endothermic because heat was taken in by the reaction.

The reaction is exothermic because heat was released by the reaction.

The reaction is endothermic because heat was released by the reaction.

The reaction is exothermic because heat was taken in by the reaction.

Answers

the second one is correct

Answer:

The reaction is exothermic because heat was released by the reaction.

Explanation:

'exothermic' means a reaction released heat over the time of the experiment.

'endothermic' means that the reaction released cold over the experiment.

(?)Li2O + (?)H2O → (?)LiOH

Answers

Answer:

Li2O+H2O---->(2)LiOH

Explanation:

you have to balance the equation and not all the blanks have to be filled all the time but if it makes it easier for you in the first 2 question marks you can put a 1 which isnt necessary but if ur a visual person it will help.

hope this helps im litterally learning the same thing as u lol

Answer:

1,1,2

Explanation:

this was correct for me, if it wasnt correct check if youre on the right question

Why only nitrogen and argon gas are used in bulb

Answers

In bulbs 93 percent Argon and 7 percent Nitrogen is filled because both these are generally heavy gases so they reduce transfer of heat between panels in bulb....
also both are colourless and dry gases....

Only nitrogen and argon is used in bulbs because these gases get heat up very fast and they are easily available in large quantity in nature to us in sufficient cost. ****HOPING THAT THIS WILL HELP YOU!!!****

a student decreases the temperature of a 556 cm^3 balloon from 278 K to 231 K. Assuming constant pressure, what should the new volume of the balloon be

Answers

Given:
A student decreases the temperature of a 556 cm^3 balloon from 278 K to 231 K at constant pressure
Required:
new volume of the balloon
Solution:
Apply Boyle's law
V1/T1 = V2/T2
(556 cm3) / (278K) = V2 / (231 K)
V2 = 462 cm3

A box experiences a force of 2 N to the left and 3 N to the right. Which is true of the box's motion?A) The box will slow down.
B) The box's velocity will be 1 m/s.
C) The box's velocity will not change.
D) The box will experience acceleration.

Answers

Answer: Option (D) is the correct answer.

Explanation:

The rate of change in velocity over change in time is defined as acceleration.

Mathematically, Acceleration = $(\Delta v)/(\Delta t)$

where $\Delta v$ = change in velocity

$\Delta t$ = change in time

Therefore, when a force of 2 N to the left and 3 N to the right then box will experience acceleration as velocity is also changing with time.

Thus, we can conclude that a box experiences a force of 2 N to the left and 3 N to the right then it is true that the box will experience acceleration.

Answer choice would be D, answer choice B, is the boxes net force. Velocity = distance/time. The correct answer is D. I hope this helps!

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