1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
kiruha [24]
3 years ago
10

Anyone Free can help me with this question please ?

Chemistry
1 answer:
ElenaW [278]3 years ago
5 0

Answer:

68

Explanation:

696969969696969696996996t9696996

sldjqkjqa

a

d

a

d

a

da

d

ad

ad

a

You might be interested in
50 J of work was done on a system, as a result of which 29 J of heat energy was removed from it. How would this affect the inter
alexandr402 [8]

Answer:

Work done=50J

Heat removed=29J

Now

\\ \sf\longmapsto \Delta E=-50+29

\\ \sf\longmapsto \Delta E=-21J

Hence the internal energy would decrease by 21J

  • Option B is correct

7 0
2 years ago
Read 2 more answers
I ASKED THIS QUESTION OVER 20 TIMES PLEASE HELP
noname [10]

Answer:

230 grams

Explanation:

8 0
2 years ago
Read 2 more answers
15 pts The drop down items have the same options for all sections labeled choose an item
tia_tia [17]

Answer:

#8 : 21.5 L of CH₄

#9 : 36 g of H₂O

#9 : 5.4 x 10²² molecules of CO₂

Explanation:

#8 : Part 1.

Data given:

no. of moles of CH₄ = 0.960 mol

volume of CH₄ = ?

Solution

volume can be calculated by following formula

          No. of moles = Volume of gas / molar volume

Rearrange the above equation

            Volume of gas = No. of moles x molar volume . . . . . . (1)

Where

molar volume = 22.4 L/mol

Put values in equation 1

           Volume of gas = 0.960 mol x 22.4 L/mol

           Volume of gas = 21.5 L

So,

By calculation 0.960 moles have 21.5 L volume of CH₄

_______________

#9 : Part 2.

Data given:

no. of moles of H₂O = 2.0 mol

mass of H₂O = ?

Solution

volume can be calculated by following formula

          No. of moles = mass in grams / molar mass

Rearrange the above equation

            mass in grams = No. of moles x molar mass . . . . . . (2)

Where

molar mass of H₂O = 2 (1) + 16

molar mass of H₂O = 18 g/mol

Put values in equation 2

      mass in grams = 2.0 mol x 18 g/mol

        mass in grams = 36 g

So,

By calculation 2.0 moles have 36 g mass of H₂O

________________

#10 : Part 3.

Data given:

volume of CO₂ = 2 L

no. of molecules of CO₂ = ?

Solution

First we have to find out number of moles of CO₂

Following formula will be used

          No. of moles = Volume of gas / molar volume

Where

molar volume = 22.4 L/mol

Put values in above equation

           No. of moles = 2 L / 22.4 L/mol

           No. of moles = 0.0893 mol

So,

No. of moles of CO₂ = 0.0893 mol

Now

we will calculate number of molecules by using following formula

          No. of moles = no. of molecules / Avogadro's number

Rearrange the above equation

            no. of molecules = No. of moles x Avogadro's number . . . . . . (3)

Where

Avogadro's number = 6.022 x 10²³

Put values in above equation 3

            no. of molecules =  0.0893 mol x 6.022 x 10²³

            no. of molecules =  5.4 x 10²²

So,

By calculation 2 L of CO₂ have 5.4 x 10²² molecules of CO₂

8 0
3 years ago
Using the periodic table, choose the more reactive metal.<br><br> Ta or V
Vera_Pavlovna [14]
V is more reactive, hope this helps!
4 0
3 years ago
Read 2 more answers
What state is nitrogen at 20 degree Celsius
Norma-Jean [14]
Nitrogen becomes a liquid at 20 degrees celsius 
3 0
3 years ago
Other questions:
  • Which process is based on repulsion of oil and water?
    13·2 answers
  • What does raoult’s law state
    7·2 answers
  • Which option correctly explains a metallic bond
    5·1 answer
  • How many grams of CO2could be produced from the combustion of 23g of C4H10in the presence of an adequate amount of O2?
    9·1 answer
  • [11]. Of these four liquids, which is the most viscous?
    14·1 answer
  • Dan gave five sunflower seedlings each a different type of fertilizer. He measured the initial and final heights of each plant a
    6·2 answers
  • A volume of 25.36 ± 0.05 mL 25.36±0.05 mL of HNO 3 HNO3 solution was required for complete reaction with 0.8311 ± 0.0007 g 0.831
    7·1 answer
  • What is produced during the replacement reaction of Cu(NO3)2 and Zn?
    11·1 answer
  • A state of matter in which the electrons temporarily separate from the protons. Group of answer choices gas plasma liquid Bose-E
    8·1 answer
  • 50 POINTS !! I have a science project that I need help with its called pH
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!