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
zhuklara [117]
2 years ago
8

Calculate the net force on the object below.

Chemistry
1 answer:
Anastaziya [24]2 years ago
8 0

Answer:

first we add the same direction. 12N + 32 N=44N .

then we add the forces. 54 up + 44N down= 10N up

You might be interested in
What is the chemical formula for decomposition?
shutvik [7]

Answer: AB A + B

Explanation:

6 0
3 years ago
How strongly gravity pulls on an objects mass is the object
Lemur [1.5K]
Yes ...................................
5 0
3 years ago
Suppose you were standing on scale in an elevator in free fall. What would the scale read?
Anestetic [448]
0 because you would be floating at the top within seconds and also have fun with the sudden stop
6 0
3 years ago
The oxidation of copper(I) oxide, Cu2O(s) , to copper(II) oxide, CuO(s) , is an exothermic process. 2Cu2O(s)+O2(g)⟶4CuO(s) The c
dem82 [27]

Answer:

The work is  

      W = -0.369kJ

The energy  change of the reaction is  \Delta U _{rxn} = 43.839 kJ  

Explanation:

From the question we are told that

    The chemical equation for this reaction is

             2 Cu_2 O + O_2_{(g)} ----> 4 CuO_{(s)}

     The mass of  Cu_2 O is  m = 42.60g

      The enthalpy Cu_2 O is  \Delta H_{re} = -43.47 \ kJ this also the change in energy in terms of heat

      The pressure at which it is oxidized is P = 1\  bar

The  no of moles of Cu_2 Oused in this reaction is mathematically represented as

        n = \frac{mass \ of   \ Cu_2 O}{Molar \ mass \  of   \ Cu_2 O}

The molar mass of Cu_2 O is  a constant with a value  M = 143.1 g/mol

   Now substituting values

             n = \frac{ 42.60}{143.1}

            n = 0.29769 \ moles

From the reaction we see that

Two mole of Cu_2 O  reacts with One mole of O_2 to give Four moles of  CuO_{(s)}

This means that

One mole of  Cu_2 O  reacts with 0.5 mole of O_2 to give two moles of  CuO_{(s)}

it also implies that

0.29769 \ mole of  Cu_2 O  reacts with 0.5 * 0.29769 moles of O_2 to give 2* 0.29769 moles of  CuO_{(s)}

so

0.29769 \ mole of  Cu_2 O  reacts with 0.149 moles of O_2 to give 0.595 moles of  CuO_{(s)}

Now the number of moles of gaseous reactant is

      N_{O_2} = 0.149 \ moles

The number of moles of gaseous product  is

     N_p = 0 \ moles

So the change in number of moles for gaseous  compounds is mathematically evaluated as

         \Delta N = 0- 0.149 \ moles

        \Delta N = - 0.149 \ moles

Now the workdone for  the compound Cu_2 O is mathematically represented as

        W = \Delta N RT

Where R is the gas constant with a value of R = 8.314 J/mol \cdot K

            T is the temperature with a value  T = 25 + 273 = 298 K

     Substituting values

     W = -0.149 * 8.314 * (298)

     W = -0.369kJ

Generally the internal energy change of the reaction can be represented as

           \Delta U _{rxn} = \Delta H_{re} - W

Substituting value

        \Delta U _{rxn} = -43.47 -  (-0.369)

        \Delta U _{rxn} = 43.839 kJ  

This is the internal energy change on the reaction for 42.60 g of Cu_2 O

       

3 0
3 years ago
A color-coded periodic table. Which elements are metals? Check all that apply. rhenium (Re) boron (B) lithium (Li) krypton (Kr)
AlekseyPX

Answer:

re) li) hg)

Explanation:

6 0
3 years ago
Read 2 more answers
Other questions:
  • Lewis structure for CH3(CH2)CH(CH3)2
    10·1 answer
  • Why is it possible to safely drink a solution that contains a 50:50 mixture of equal concentrations of a strong acid and a stron
    11·1 answer
  • Does the amount of matter change when the water goes from a solid to a liquid?
    13·1 answer
  • A coordination complex is made up of _________________________________________. (Choose one) Selected Answer: IncorrectC. a tran
    8·1 answer
  • The rate constant for the first-order decomposition at 45 °C of dinitrogen pentoxide, N2O5, dissolved in chloroform, CHCl3, is 6
    5·1 answer
  • Where is almost all the mass of an atom​
    6·1 answer
  • A student finds a puddle of water in a garden and takes a sample he wants to perform an experiment to determine if they are livi
    6·1 answer
  • HELP!!!!!! 40 POINTS!!!!!!
    9·2 answers
  • Which type of molecule is made from nucleotides?
    9·1 answer
  • You need to prepare 500 mL of a 0.250 M NaOH solution for a titration. What mass of NaOH is needed to
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!