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
ZanzabumX [31]
4 years ago
15

I need help with this

Chemistry
1 answer:
lys-0071 [83]4 years ago
3 0

Answer:

Fossils are the some traces or portions of the animals or plants, buried and preserved from past in rocks, sediments or ice.

Explanation:

                                  Correct match  is as follows-

  1. Mold and cast fossils-  An organism is buried in sediment after it dies.The hard part of organism leave behind a empty space imprinted in the rock. Later sediments and minerals fill the space and harden to make the original copy of the organisms.
  2. Carbon film fossils- An organism buried in sediments gets squeezed and heated inside the earth , leaving behind a thin carbon outline of the organism on a rock.
  3. Amber fossil-  An organism covered in tree resin or tree sap , which then hardens with the body of the organisms preserved inside.
  4. Ice fossil- An organism dies in a cold place on earth , its body becomes frozen and covered in layers of ice . The hard and soft part of the body may be preserved.

You might be interested in
Xas shown in table 15.2, kp for the equilibrium n21g2 + 3 h21g2 δ 2 nh31g2 is 4.51 * 10-5 at 450 °c. for each of the mixtures li
Agata [3.3K]
According to the balanced equation of this reaction:
N2(g) + 3H2(g) ↔ 2NH3(g)
and when we have Kp = 4.51 x 10^-5 so, in the Kp equation we will substitute by the value of the P for each gas to compare the value with Kp = 4.51x10^-5

a) when we have 98 atm NH3, 45 atm N2, 55 atm H2 by substitution in Kp equation:
Kp= [p(NH3)]^2 / [p(N2)]*[p(H2)]^3 = [98]^2 / [45]*[55]^3
                                                        = 1.28x10^-3 
So here the value is higher than the value of the given Kp.
so the reaction will go leftwards toward the reactants ( to reduce the value of Kp) to reach the equilibrium. 
b) When 57 atm NH3, 143 atm N2, No H2 so like a) by substitution:
Kp = [57]^2 / [143] = 22.7
So the reaction will go leftwards toward the reactants to reduce the value of Kp to reach equilibrium.
c) when 13 atm NH3, 27 atm N2, 82 H2
Kp = [13]^2 / [27]*[82]^3 = 1.135 x 10^-5 So this value is lower than the Kp which is given.
 so, the reaction will go towards the right toward the products to increase the value of Kp to reach the equilibrium.  
8 0
3 years ago
HELP ASAP!<br><br> what is the molar mass of Na2CO3?
tekilochka [14]

The correct answer is 106.0 g/mol

5 0
3 years ago
Read 2 more answers
Heating the marshmallows over the hot plate showed the idea of
zloy xaker [14]
Answer:

the answer is either B or C

explanation:

brainliest?
6 0
2 years ago
Read 2 more answers
Calculate ΔH for the reaction: C(graphite) + 2H 2(g) + 1/2 O 2(g) =&gt; CH 3OH(l) Using the following information: C(graphite) +
Alika [10]

Answer:

\Delta H for the given reaction is -238.7 kJ

Explanation:

The given reaction can be written as summation of three elementary steps such as:

C(graphite)+O_{2}(g)\rightarrow CO_{2}(g) \Delta H_{1}= -393.5 kJ

2H_{2}(g)+O_{2}(g)\rightarrow 2H_{2}O(l) \Delta H_{2}= (2\times -285.8)kJ

CO_{2}(g)+2H_{2}O(l)\rightarrow CH_{3}OH(l)+\frac{3}{2}O_{2}(g)  \Delta H_{3}= 726.4 kJ

---------------------------------------------------------------------------------------------------

C(graphite)+2H_{2}(g)+\frac{1}{2}O_{2}(g)\rightarrow CH_{3}OH(l)

\Delta H=\Delta H_{1}+\Delta H_{2}+\Delta H_{3}=-238.7 kJ

4 0
4 years ago
What is the mass in grams of 1.00*10^12 lead atoms
pav-90 [236]
34.5 X 10^-11 grams of lead
5 0
3 years ago
Other questions:
  • "Alkenes" ________.are reasonably soluble in water are relatively polar compounds have lower boiling points than alcohols of sim
    15·1 answer
  • Which of the following bonds is most popular?<br> C-C,C-N,C-O,C-H
    10·1 answer
  • why do astronomers use frequencies other than the visible ones when they are investigating the universe?
    8·1 answer
  • Draw and label a diagram to show how you would separate each mixture?
    11·1 answer
  • What does Einstein’s theory of relativity expalain?
    6·1 answer
  • GUYS I NEED HELP WHO EVER DOES THIS QUESTION Ill GIVE THEM brainliest PLUS 100 POTIONS
    11·1 answer
  • Which object has more thermal energy? Assume that all objects are at the same temperature.
    5·2 answers
  • I need help please hurry I’m on a schedule
    5·1 answer
  • Please help! I don’t know the answer!
    9·1 answer
  • A cube measuring 1cm x 1cm x 1cm is full of water, What is the mass of the water in the cube? (Water has a density of 1.0)
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!