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
ss7ja [257]
3 years ago
14

Mountains and valleys are some of the features found in the layer of rock at Earth's surface called the

Chemistry
1 answer:
loris [4]3 years ago
5 0

Answer:

Narrow

Explanation:

Narrow

You might be interested in
Be sure to answer all parts.The combustion of a 40.0−g gaseous mixture of H2 and CH4 releases 3766 kJ of heat. Calculate the amo
Svetach [21]

Answer:H2=11.4g

CH4=28.6g

Explanation:The complete combustion of the two gases can be represented by a balanced reaction below

1. CH4 +2O2___CO2+2H2O

2.2H2+O2___2H2O

Combining the two we have CH4 +2H2+3O2___

CO2+4H2O

Since the mixture contains 40gof CH4 and 2, therefore 20g of CH4 and 8g of H2 combines.

Calculated from their molecular Mass i.e CH4 12+4×2)=20 and 2H2= 2×2×2=8g

Mass of CH4=20/28×40=28.6g

2H2=8/28×40=11.4g

7 0
3 years ago
Which of the following is true about the concept of half-life?
Reptile [31]
Its A. because it measures the rate of the decay of the isotope
8 0
3 years ago
Read 2 more answers
0.00099989<br> 3 sig figs, scientific notation
mixas84 [53]
1.00*10^3
You’d need to lower the exponent because rounding to 3 sig figs changes the 9’s to - 1000. Keep the 0’s.
5 0
3 years ago
A cheetah can run 112km/h over a 100-m distance. what is this speed in meters per second
Naya [18.7K]
First convert the 112 km/hr ratio into m/s (meters per second). To do this you multiply 112 km with 1000 m/km (since there's 1000 m in one km). You get 112000 m. Then multiply 1 hr with 60 min/hr (since there's 60 min in one hr. You get 60 min, but you want seconds, so multiply 60 min with 60 s/min to get 3600 s. There you go! Your answer is the speed of 112000m/3600s, but you can simplify that to 31.11m/s (since the answer should be in ? meters per 1 second.

Also, the "100-m-distance" part of the question is just to throw you off, because one particular speed obviously stays constant over any distance. Hope that helps :)
7 0
3 years ago
If one atom of potassium and one atom of chlorine form an ionic bond, what are the charges of the two ions?
fiasKO [112]

Answer:

The answer is the letter A.

Explanation:

It is letter A because of Chlorine needs an electron to have a full shell. So, it will receive a negative one because it is gaining an electron. Potassium lost an electron because the element has to share the electron with Chlorine to balance its properties.

5 0
3 years ago
Other questions:
  • How many grams of NaCl are needed to prepare 50.0 grams of a 35.0% salt solution?​
    14·1 answer
  • Please answer the blank
    12·1 answer
  • Categorize each hydrocarbon as being saturated or unsaturated.
    11·2 answers
  • To show the electron configuration for an atom, what is the advantage of using an orbital notation compared to a dot structure?
    12·2 answers
  • Group 13 elements tend to have what charge
    9·2 answers
  • Where does the Earth get most of its energy from?
    5·2 answers
  • A science teacher gave a student a sample of a clear liquid labeled "unknown substance." which property would best help the stud
    6·2 answers
  • You have a gas at a volume of 9.71 L at a pressure of 209 torr and at 10.1 °C. What
    8·1 answer
  • 23.<br> What would happen to the substance in the jar if energy was added?
    13·1 answer
  • Polyester is a synthetic material used for many different purposes. It is produced from petroleum and natural gas. Producing pol
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!