CHEMISTRY HIGH SCHOOL

Fossil fuels are made by the decay of living things. Because living things are always dying and decaying, why are fossil fuels not a renewable source of energy?A.They can only be formed by decay of reptiles.

B.They can only be formed by decay of swamp plants.

C.They take millions of years to form.

D.They can only be formed deep under the sea.

Answers

Answer 1
Answer:

The answer is: C. They take millions of years to form.

Fossil fuel is a fuel formed by anaerobic decomposition of buried dead organisms.

If there was oxygen the organic matter would not decomposed and formed oil and gas, because there would be reaction of oxidation.

The age of the organisms and their resulting fossil fuels is typically millions of years

Fossil fuel is mixture (solution) consist of several different hydrocarbons (alkanes, alkenes...), aromatic compounds.
Answer 2
Answer: c. they take millions of years to form

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4. What parts of Dalton’s atomic theory no longer agree with the current picture of the atom? Provide an answer using 3 – 4 sentences in your own words.

Answer THIS QUESTION

Answers

Answer:it is 580

Explanation:

I had the answer on my quiz

7. Which of the following has to happen before the eardrum begins to vibrate with the same frequency as the source of the sound waves? A. Vibrations have to be transmitted to the fibers of the auditory nerve.
B. Impulses have to be sent to the brain through the auditory nerve.
C. The brain has to interpret the direction from which the sounds are being delivered.
D. The outer ear has to collect the sound waves and lead them to the middle ear.

Answers

The outer ear has to collect the sound waves and lead them to the middle ear and this is what has to happen before the eardrum begins to vibrate with the same frequency as the source of the sound waves. The correct option among all the options that are given in the question is the last option or option "D".

Answer : Option D) The outer ear has to collect the sound waves and lead them to the middle ear.

Explanation : Hearing is dependent on a series of complex steps that change vibrations of sound waves in the air into electrical signals. At first the vibrations of sound waves gets collected by the outer ear and from there sound waves travel through a narrow passageway called the ear canal, which leads to the eardrum. The eardrum vibrates from the incoming sound waves and sends these vibrations to three tiny bones in the middle ear. The auditory nerve then carries these signals to the brain.

if eqaul volumes of 0.1 m naoh and 0.1 m hcl arw mixed, the resulting solution will contain a salt and what

Answers

It will contain NaCl.  The acid base reaction will look like this: HCl(aq)+NaOH(aq)⇒H₂O(l)+NaCl(aq)

The reaction occurs due to the fact that HCl (being a strong acid) will dissociate into H⁺ and Cl⁻ while NaOH (being a strong base) will dissociate into OH⁻ and Na⁺.  The H⁺ and OH⁻ will react together to form water and the Na⁺ and Cl⁻ will remain in solution as the salt.  (this is sometimes called a neutralization reaction since the HCl and NaOH neutralize each other.)

I hope this helps. Let me know if anything is unclear.

A moving company is called into a building and asked to relocate 520 bricks to a location 15 meters above the ground. If each brick is 4 kilograms, what amount of work will be needed to accomplish the task? A. 305,760 J B. 229,320 J C. 203,840 J D. 588,000 J

Answers

Work = Force * distance (aka Weight * height lifted)

Work to lift 1 brick:
W = mgh = (4 kg)(9.8 m/s²)(15 m) = 588 J

Work to lift 520 bricks:
W = 520(588 J) = 305,760 J

I just took the test, the answer is A. 305,760 J, good luck.

the number of electrons in the outer ring of the elements phosphorus, potassium, oxygen, iodine, gold, bromine, sulfur, and cobalt?

Answers

Phosphorus = 5
Potassium = 1
Oxygen = 6
Iodine = 7
Gold = (a transition metal)
Bromine = 7
Sulfur = 6
Cobalt = (a transition metal)

For future reference, look at the group number along the top, it tells you :)

Answer: I think its c (germanium)

Explanation:

What produces hydrogen ions as The only positive ions in aqueous solution

Answers

Mostly acids produces H+ ions. Acids dissociates into ions when in aqueous form resulting to hydronium or hydrogen ions and the other ion which has a negative charge. For instance, hydrochloric acid, it dissociates into H+ and Cl-.
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