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
8090 [49]
2 years ago
8

How many oxygen (O) atoms are in a molecule of SiO2? O A. 1 OB. 3 C. 4 D. 2

Physics
2 answers:
mafiozo [28]2 years ago
3 0
I believe it is D. 2
nikdorinn [45]2 years ago
3 0
The answer is D. 2 because O2 means there is 2 atoms of oxygen.
You might be interested in
Please select the word from the list that best fits the definition
enyata [817]

Answer:

conductor

Does not easily transfer electricity

8 0
2 years ago
Can a compound be separated by physical means?
Julli [10]

No,  it is not possible.
A compound is a substance or material constituting of two or more elements that have been chemically combined together to form a new, different substance

Any elements that have been joined together chemically can only be separated back into their constituent elements by chemical means because the bonds holding them together can only be broken using chemical means.

A good example is sodium chloride, table salt. Poisonous chlorine gas and toxic sodium metal react together whereby sodium loses one electron which chlorine readily accepts and in the process an ionic bond is formed between the two resulting in a totally new, harmless compound , sodium chloride.

Only through electrolysis can sodium chloride be separated back into sodium and chlorine gas. No physical means can be used to do that.

3 0
3 years ago
Suppose you first walk 12.5 m in a direction 20° west of north and then 24 m in a direction 40° south of west as shown in the fi
Firlakuza [10]
La ce materie vr ca sunt pe tableta

3 0
2 years ago
A man is dragging a trunk up the loading ramp of a mover’s truck. The ramp has a slope angle of 20.0°, and the man pulls upward
AleksandrR [38]

Answer:

(a)  104 N

(b) 52 N

Explanation:

Given Data

Angle of inclination of the ramp: 20°

F makes an angle of 30° with the ramp

The component of F parallel to the ramp is Fx = 90 N.  

The component of F perpendicular to the ramp is Fy.

(a)  

Let the +x-direction be up the incline and the +y-direction by the perpendicular to the surface of the incline.  

Resolve F into its x-component from Pythagorean theorem:  

Fx=Fcos30°

Solve for F:  

F= Fx/cos30°  

Substitute for Fx from given data:  

Fx=90 N/cos30°

   =104 N

(b) Resolve r into its y-component from Pythagorean theorem:

     Fy = Fsin 30°

   Substitute for F from part (a):

     Fy = (104 N) (sin 30°)  

          = 52 N  

5 0
2 years ago
What is the wavelength of a wave that has a frequency of 15HZ and a wave speed of 5 m/s?
stepladder [879]

Answer:

A.   .33m

Explanation:

Have a good day.

5 0
2 years ago
Other questions:
  • Images to promote fitness often lead readers to a certain conclusion about appearance. Which of the following is a practice teen
    13·2 answers
  • How do cells and atoms relate?
    15·2 answers
  • The first step in the sewage-treatment process is _____.
    5·2 answers
  • Parallel rays of monochromatic light with wavelength 582 nm illuminate two identical slits and produce an interference pattern o
    13·1 answer
  • The force between two very small charged bodies is found to be F. If the distance between them is tripled without altering their
    9·1 answer
  • Would You Rather...Carry a 50 lb box up 3 flights of stairs or a 25 lb box up 5 flights of stairs? Whichever choice you make, ju
    7·1 answer
  • Identify which objects will accelerate to the left, which will accelerate to the right,and those that will not accelerate. Optio
    15·1 answer
  • Light of a given wavelength is used to illuminate the surfacce of a metal, however, no photoelectrons are emitted. In order to c
    8·1 answer
  • !!!!100 POINTS!!!!
    11·1 answer
  • If the child is gaining weight at an expected rate, a child who weighs 36 lb (16.3 kg) at 3 years of age would weigh what amount
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!