How many grams are there in 7.4x10^23 molecules of Na2SO4?

Answers

Answer 1
Answer: molar mass Na2SO4 = 142.04 g/mol

142.04 g -------------- 6.02x10
²³ atoms
??  g ------------------ 7.4x10²³ atoms

142.04 x ( 7.4x10²³) / 6.02x10²³

=> 174.60 g

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How would you be able to use the spectrum of each gas to establish its identity

Answers

You could compar and contrast the identities so you can compare them and identify them

Based on intermolecular forces, which of these substances would have the highest boiling point?(1) He (3) CH4
(2) O2 (4) NH3

Answers

NH3 would have the highest boiling point because the molecules have all 3 types of bonds:
London dispersion, because all molecules do
Hydrogen Bond, because of the fact that hydrogen is present and so is Nitrogen, one of the elements that hydrogen will form a hydrogen bond with.
Dipole Bond: Because the NH3 has a lone pair

Answer: NH3

Hope this helped!!!
Based on intermolecular forces, NH3 would have the highest boiling point. 

A substance has a triple point at -24.5 ∘C and 225 mmHg. What is most likely to happen to a solid sample of the substance as it is warmed from -35 ∘C to 0 ∘C at a pressure of 220 mmHg? A substance has a triple point at -24.5 and 225 . What is most likely to happen to a solid sample of the substance as it is warmed from -35 to 0 at a pressure of 220 ? The solid will melt into a liquid, The solid will sublime into a gas, or Nothing (the solid will remain as a solid).

Answers

Answer:

The solid will sublime into a gas

Explanation:

See the phase diagram attached (the diagram is not an exact representation of this case, it is only illustrative). You starts at point A, that is, a point below triple point pressure (220 mmHg is lower than 225 mmHg) and to the left of triple point temperature (-35 °C is lower than -24.5 °C). Then, you move to point B, which is at the same pressure at A but its temperature is to the right of triple point temperature (0°C is greater than -24.5 °C).

this product remains as mercury if it is subatomic

Rob measures the solubility of three different salts in water at 22°C. Which type of graph should he use to display his data? bar graph line graph histogram scatterplot

Answers

The best graph Rob can use to show his data is a scatter plot. A scatter plot shows a relationship between two sets of data in this case the solids and their respective solubility. A scatter plot is very specific in showing how one variable is affected by another variable.

Answer:

bar graph

Explanation:

hope it helps

What is the work done when a volume increases from 3 litersto 5 liters at 6 atm of pressure? (Conversion factor: 1 L atm = 100))

Answers

Answer:

-1215.9J is the work done

Explanation:

It is possible to find work done in the change of volume of a gas at constant pressure using:

W = -P×ΔV

Where W is work, P is pressure and V is change in volume}

Replacing:

W = -6atm×(5L-3L)

W = -12atmL

As 1atmL = 101,325J, work done in joules is:

-12atmL ×(101.325J / atmL) = -1215.9J is the work done

The value of work done when a volume increases from 3 liters to 5 liters at 6 atm of pressure is -1215.9 Joules.

How do we calculate workdone?

Workdone on any boby or by the body will be calculated as:

W = -P×ΔV, where

W = workdone

P = applied or exerted pressure = 6 atm

ΔV = change in volume due to workdone = (5-3) L

Negative sign in the formula shows that work is done on the opposite side of the pressure or volume.

On putting all these values on the above equation, we get

W = -6atm × (5L-3L)

W = -12 atmL

We know that, 1 atmL = 101,325 J,

So, workdone in joules will be written as:

-12 atmL × (101.325J / atmL) = -1215.9 J

Hence, -1215.9 J is the workdone.

To know more about workdone, visit the below link:
brainly.com/question/18363506

Which of the following are examples of cations? A. SO42- B. HCO3- C. Cl- D. HPO42- E. Ca2+

Answers

D or b but I don't know for sure