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
vfiekz [6]
2 years ago
11

Calculate the mass of a sample of lead (cPb = 0.16 J/g℃) when it loses 200 J cooling from 75.0℃ to 42.0℃.

Chemistry
1 answer:
egoroff_w [7]2 years ago
7 0
Looses 299 please collins 75.0
You might be interested in
Which of the following is true when 1 M KCl is diluted to semi-molar KCl?
eimsori [14]

The solution before dilution and after dilution contains same number of moles, and water is added for dilution.

Option B

<h3><u>Explanation:</u></h3>

Suppose before dilution, the solution contains x moles of KCl in Y liter of water. Now as the concentration got halved, then the solution contains x moles of KCl in 2Y kiters of solution. So the number of moles of KCl in the solution remained constant.

Again, as the solution is diluted to half of the concentration, water must have been added with the solution to make it dilute.

4 0
3 years ago
Read the following paragraph from the section "Dreaming Of A World Deep Below."
LiRa [457]

Answer:

B

Explanation:

The interior planet has fascinated a lot of people so a lot of theories have been made about what's in there.

6 0
2 years ago
What is the lowest temperature that a substance can reach?
kobusy [5.1K]
Absolute zero that means cooling - 0 degree
3 0
3 years ago
How is synthesis and decomposition reaction related to each other???
Anit [1.1K]
They are kind of opposite processes. Chemical synthesis is execution of chemical reactions to make products. Like you take two substances, you put them together, they react and you have new a substance. For example. 2Na+{ Cl }_{ 2 }\rightarrow 2NaCl here Sodium and Chlorine react to make a new substance which is Sodium Chloride.

Chemical decomposition is process of seperating a substance to different substances. There is a substance by a reaction this substance becomes two substances, Like : XY -> X+Y For example : 2{ H }_{ 2 }O(l)\quad \rightarrow 2{ H }_{ 2 }+{ O }_{ 2 }
8 0
3 years ago
Read 2 more answers
Phosphine, PH3(g), decomposes according to the equation 4PH3(g) --&gt; P4(g) + 6H2(g) The kinetics of the decomposition of phosp
TEA [102]

good luck with that. I thought I had it, but it was not right.

3 0
3 years ago
Read 2 more answers
Other questions:
  • Which of the following correctly identifies active transport? (1 point) Transport proteins move large molecules from areas of lo
    10·2 answers
  • PLEASE HELP!!! 890 g of reactant A completely reacts with 120 g of reactant B to form two products. If product A has a mass of 9
    11·1 answer
  • When a person looks at a bright light, tiny muscles in the eye contract so less light can enter the eye.
    9·2 answers
  • Because metallic bonds permit one plane of ions to slide past another without breaking bonds, metals are:_______
    7·1 answer
  • How does the light source readout differ from the x-ray readout in the gizmo??
    15·1 answer
  • This group has characteristics including: brittleness, insulators/poor conductors, and are often found as gases.
    8·2 answers
  • Consider an experimental setup with two compartments separated by a phospholipid bilayer membrane containing ion channels select
    11·1 answer
  • EASY BUT I STILL NEED HELP
    8·2 answers
  • What is the molarity of a 0.250 L MgCl2 solution that contains 0.175 mol MgCl2?
    9·1 answer
  • Describe fractional distillation and explain what a fraction is?
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!