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
Ainat [17]
3 years ago
11

Which of the following is the car average speed?

Chemistry
1 answer:
kap26 [50]3 years ago
4 0

Answer:

it would be 100 km/hr

Explanation:

if you divide each speed by the time you get 100 each time

You might be interested in
What is the molar mass of fluorine, F2?
Naily [24]
<span>37.9968064 ± 0.0000010 g/mol</span>
8 0
3 years ago
Read 2 more answers
If you repeat an experiment and the result are very different from the result you got the first time the next step would be to w
Bess [88]
You would want to make sure that you have controlled the variables properly, and if you determine that you did then you would repeat the experiment to be sure of the results.
4 0
3 years ago
A sample of TNT, C7H5N3O6 , has 8.94 × 1021 nitrogen atoms. How many hydrogen atoms are there in this sample of TNT?
Bess [88]

Answer:

1.49×10²² atoms of H are contained in the sample

Explanation:

TNT → C₇H₅N₃O₆

1 mol of this has 7 moles of C, 5 moles of H, 3 moles of N and 6 moles of O

Let's determine the mass of TNT.

Molar mass is = 227 g/mol

As 1 mol has (6.02×10²³) NA atoms, how many moles are 8.94×10²¹ atoms.

8.94×10²¹ atoms / NA = 0.0148 moles

So this would be the rule of three to determine the mass of TNT

3 moles of N are in 227 g of compound

0.0148 moles of N are contained in (0.0148 .227) / 3 = 1.12 g

Now we can work with the hydrogen.

227 grams of TNT contain 5 moles of H

1.12 grams of TNT would contain (1.12 .5) / 227 = 0.0247 moles

Finally let's convert this moles to atoms:

0.0247 mol . 6.02×10²³ atoms / 1 mol = 1.49×10²² atoms

8 0
3 years ago
If an atom with a mass number of 27 has 14 neutrons,it is an isotope of which element​
kkurt [141]

Answer:

the number of neutrons in above isotope = A - Z = 27 - 13 = 14. Note: The molar mass of aluminium, which is average of atomic masses of all isotopes = 26.981538 g/mol, since 13Al27 is the major isotope.

Explanation:

   

5 0
3 years ago
Read 2 more answers
Food can spoil very quickly. Which methods are used to minimize the reactions that allow bacteria and fungi to grow?
Oduvanchick [21]

Answer:

preservatives and low temperature

3 0
3 years ago
Read 2 more answers
Other questions:
  • Moles of Zn in 5.6*10^24 atoms of Zn
    7·1 answer
  • Write a scientific explanation using the CER format to answer the question:
    9·1 answer
  • The formula for chlorine dioxide
    15·2 answers
  • What are the two different ions present in the compound NH4NO3?
    12·1 answer
  • PLZ HELP ME..ITS MY TEST
    12·2 answers
  • Who was the first person credited with developing an atomic theory based on the results of experiments?
    12·2 answers
  • Think about how particles are arranged inside atoms. Please name and describe those three particles, and describe how the partic
    15·1 answer
  • Please help me.. i would appreciate it.. 50 points and will mark brainliest
    7·2 answers
  • Which best describes the source of radiation heat
    9·1 answer
  • A CHM 111 student completing Part B recorded the mass of several pieces of dry metal as
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!