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
joja [24]
3 years ago
8

Mr. Evans rides his bicycle an average speed of 8 km/hr. How far has he

Chemistry
2 answers:
prohojiy [21]3 years ago
7 0

Answer:

\boxed {\boxed {\sf 32 \ kilometers}}

Explanation:

Distance is the product of speed and time.

d=s*t

The speed is 8 kilometers per hour and the time is 4 hours.

s= 8 \ km/hr \\t= 4 \ hr

Substitute the values into the formula and multiply. Note that the hours will cancel when multiplied.

d= 8 \ km/hr * 4 \ hr

d= 32 \ km

Mr. Evans traveled <u>32 kilometers.</u>

Nadusha1986 [10]3 years ago
3 0

Answer:

32 km.

Explanation:

Distance = speed × time

We know that Mr. Evans is riding his bicycle at an average of 8km/hr, or 8 kilometers per hour. He is riding his bike for 4 hours, so we will need to multiply according to the formula.

8 × 4 = 32

The answer to the question is 32 kilometers.

You might be interested in
A molecule that oxidized gains electrons and energy. true or false
quester [9]
I suppose it false, since the oxidation involves the loss or removal of the electrons such forth it does not gain electrons.
5 0
3 years ago
How many grams of Fe3O4 are required to react completely with 300 grams of H2?
vekshin1

Answer:

2023.04 g

Explanation:

Magnetite reacts with hydrogen to produce Iron metal and steam. Steam instead of water is produced as the reaction occurs at temperatures above the boiling point of water.

Fe₃O₄ + 4 H₂ → 3 Fe +4 H₂O

From the equation, 1 mole of Fe₃O₄ reacts with 4 moles of H₂.

69.76 grams of H₂ has the following number of moles.

Number of moles= mass/RAM

=69.76/2

=34.88 moles.

The reaction ratio of Fe₃O₄ to H₂ is 1:4

Thus number of moles of magnetite= (1×34.88)/4

=8.72 moles.

Mass= moles × molecular weight

=8.72 moles × (56×3+16×4)

=2023.04 grams

8 0
3 years ago
Which of the following has 62 neutrons, 46 protons, and 46 electrons?​
Vesna [10]
The answer is Silver (Ag)
6 0
3 years ago
How many protons, neutrons, and electrons make up an ion of
yKpoI14uk [10]

Answer:

protons=15

electron=15

neutron=16

6 0
3 years ago
BRAINLIESTTT ASAP!! PLEASE HELP ME :)<br><br> Relate temperature and molecular motion.
Marina CMI [18]

higher temp=faster motion

lower temp=slowed motion

4 0
3 years ago
Other questions:
  • The Bohr model of the atom explained why emission spectra are discrete. It could also be used to explain the photoelectric effec
    12·2 answers
  • 1.1 Outline a method for separating the chalk from potassium chloride,
    13·1 answer
  • Select true or false: substitute natural gas can be synthesized by passing carbon monoxide and hydrogen over ni or co at 400°c.
    6·1 answer
  • Whats an organic chemist
    15·1 answer
  • Which of the following would not be considered a physical property? Group of answer choices : (A) temperature at which a materia
    10·1 answer
  • Question 12
    14·1 answer
  • A solution contains two isomers, n-propyl alcohol and isopropyl alcohol, at 25°C. The total vapor pressure is 38.6 torr. What ar
    9·1 answer
  • How many sodium atoms (Na) are in 3.00 moles of Na3PO4?
    10·1 answer
  • A. 207 kJ<br> B. 4730 kJ<br> O C. 9460 kJ<br> O D. 414 kJ
    13·1 answer
  • Air is made of nitrogen, carbon dioxide, and small amounts of other gases. What is the pressure of O₂, total is 1 atm if PN₂ = 5
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!