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
Harlamova29_29 [7]
3 years ago
13

Put two books on top of your wooden block and calculate the sliding force of friction. Write your answer below. Sliding force of

friction with weights 4.2 newtons. How does weight influence the sliding force of friction? Explain using the data above.
PLEASE HELP
Chemistry
1 answer:
navik [9.2K]3 years ago
5 0

Answer:

I need this answer too!!!!!!!!!

Explanation:

You might be interested in
4.00 g of sodium and 2.00 g of oxygen react according to the following balanced equation 4 Na + O2 → 2 Na2O Calculate the mass o
posledela
6.00g because it is a balanced equation
6 0
3 years ago
Please i need your help asap!
denis23 [38]

Answer:

Density is mass over volume.

Explanation:

6 0
3 years ago
Why do electrons enter the 4s orbital before entering the 3d orbital?
Allisa [31]
Because that is the outer ring.
6 0
4 years ago
Read 2 more answers
Predict the sign of the entropy change,Delta S, for each of the following reactions:The signs are either going to be pos or nega
algol [13]

Answer: a) Pb^{2+}(aq)+2Cl^-(aq)\rightarrow PbCl_2(s):  negative

b)  CaCO_3(s)\rightarrow CaO(s)+CO_2(g) : positive

c) 2NH_3(g)\rightarrow N_2(g)+3H_2(g): positive.

d) P_4(g)+5O_2(g)\rightarrow P_4O_{10}(s) : negative

e) C_4H_8(g)+6O_2(g)\rightarrow 4CO_2(g)+4H_2O(g):  positive.

f) I_2(s)\rightarrow I_2(g) : positive.

Explanation:

Entropy is the measure of randomness or disorder of a system. If a system moves from  an ordered arrangement to a disordered arrangement, the entropy is said to decrease and vice versa.

\Delta S is positive when randomness increases and \Delta S is negative when randomness decreases.

a) Pb^{2+}(aq)+2Cl^-(aq)\rightarrow PbCl_2(s)

As ions are moving to solid form , randomness decreases and thus sign of \Delta S is negative.

b) CaCO_3(s)\rightarrow CaO(s)+CO_2(g)

As solid is changing to gas, randomness increases and thus sign of \Delta S is positive.

c) 2NH_3(g)\rightarrow N_2(g)+3H_2(g)

As 2 moles of reactants are converted to 4 moles of products , randomness increases and thus sign of \Delta S is positive.

d) P_4(g)+5O_2(g)\rightarrow P_4O_{10}(s)

As gas is changing to solid, randomness decreases and thus sign of \Delta S is negative.

e) C_4H_8(g)+6O_2(g)\rightarrow 4CO_2(g)+4H_2O(g)

As 7 moles of reactants are converted to 8 moles of products , randomness increases and thus sign of \Delta S is positive.

f) I_2(s)\rightarrow I_2(g)

As solid is changing to gas, randomness increases and thus sign of \Delta S is positive.

6 0
3 years ago
Explain how did you find the qostion
Alekssandra [29.7K]
What do you mean by this?
6 0
2 years ago
Other questions:
  • You discover some bones that have roughly %s as much carbon-14 in them as
    10·2 answers
  • Light strikes a beautiful white perch under water. This light is reflected back to your eyes allowing you to see the fish. As th
    12·1 answer
  • 7.66 Write balanced equations for the following reactions: (a) potassium oxide with water, (b) diphosphorus trioxide with water,
    11·1 answer
  • How many sigfigs in 10.0 ?<br> Your answer<br> I
    7·1 answer
  • 4 Lef's say you find a fossil in a layer of shale. How might you determine the age of the shale?
    14·1 answer
  • A substance that undergoes a chemical change is still the same substance after the change
    5·1 answer
  • Does potassium nitrate (KN03) incorporate ionic bonding, covalent bonding, or both? Explain.
    7·1 answer
  • Which is the best name for the compound CaSO4•2H2O?
    9·2 answers
  • Question - Complete and balance the following chemical equations:
    10·1 answer
  • Calculate AHræn for the following reaction
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!