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
noname [10]
3 years ago
10

The winner of the 20 km race ran at an average speed of 4 m / s. How long did he take to complete the race?

Chemistry
1 answer:
Amanda [17]3 years ago
4 0

Answer: 5, 000s

Explanation:

Distance 20km=20,000m

Speed 4m/s

Time =?

Speed = distance / time

4 = 20, 000/ x

Cross multiply

4x=20, 000

X = 5, 000

X = time = 5, 000

You might be interested in
Find an element that has the same
navik [9.2K]

Answer:sodium

Explanation: because its not hard to look on the PERIODIC TABLE

4 0
3 years ago
What is the mass of a liquid that has a volume of 50.0ml and a density of 2.40g/ml?
Iteru [2.4K]

Answer:

120g Using Density Equation.

Explanation:

Density =mass/volume

We need to the solve for the mass.

Mass=Density * Volume

Mass= 2.40 g/ml * 50.0 ml = 120g

5 0
3 years ago
Draw a structural formula for the alkene you would use to prepare the alcohol shown by hydroboration/oxidation.
Nastasia [14]

Answer:

See explanation

Explanation:

The question is incomplete because the image of the alcohol is missing. However, I will try give you a general picture of the reaction known as hydroboration of alkenes.

This reaction occurs in two steps. In the first step, -BH2 and H add to the same face of the double bond (syn addition).

In the second step, alkaline hydrogen peroxide is added and the alcohol is formed.

Note that the BH2 and H adds to the two atoms of the double bond. The final product of the reaction appears as if water was added to the original alkene following an anti-Markovnikov mechanism.

Steric hindrance is known to play a major role in this reaction as good yield of the anti-Markovnikov like product is obtained with alkenes having one of the carbon atoms of the double bond significantly hindered.

5 0
3 years ago
What information is provided by absolute dating that cannot be provided by relative dating
kiruha [24]
Relative dating is the process of determining whether an object or event is older or younger than other objects or events. Absolute dating is d<span>etermining the age of an event or object in years. From absolute dating, the real age of the object is obtained which is not present for relative dating. Hope this helps.</span>
6 0
3 years ago
Read 2 more answers
Which of the following is a physical property of a substance?? A. Combustion B. Corrosion C. Tendency to tarnish D. Solubility
Fofino [41]
A physical property does not change the substance. 

Solubility would be the answer since all of the rest are changing the substance. They all deal with bonds except solubility. 

Answer: D. Solubility

6 0
3 years ago
Read 2 more answers
Other questions:
  • In order to understand the prehistory of the Hawaiian island of Lana'i better, anthropologists Maria Sweeney, Melinda Allen, and
    6·1 answer
  • The elements on the right side of the stair steps of the periodic table are classified as
    15·1 answer
  • How many nitrogen atoms are in 2.79 mo.of NH3
    12·1 answer
  • Why is atmospheric pressure much lower on the top of a mountain than it is as sea level?
    5·2 answers
  • What is the wavelength of a wave having a frequency of 3.76 times 10 ^14 s^-1
    8·1 answer
  • What is the mass, in grams, of 1.33 mol of water, H2O? Express the mass in grams to three significant figures.
    14·2 answers
  • Transamination removes the amino group to form a carbon skeleton that contains
    5·2 answers
  • What is the specific latent heat of fusion of ice if it takes 863 kJ to convert 4.6 kg of ice into water at 0 C?
    5·1 answer
  • Hekehwkhekehekhdkfnflebkdkfbrkebekebe
    8·2 answers
  • She remembered that chemical equations can summarize what happens in a chemical reaction. What is the name of the two parts foun
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!