The bicycle is said to be the most energy-efficient means of transportation. Where does the energy that drives it come from?

Answers

Answer 1

Answer: The energy that drives the bicycle comes
from the food that the rider eats.

Answer 2

Answer: well the food that the person eats powers the mucles and the person uses their wieght/gravity to push down on the pedals which pulls the chain and, since the wheel is a diffarent size, you either get more power and less speed or more speed and less power

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A 4,000 mL solution of AgNO3 contains 17.00 g of solute in water. Calculate the molar concentration of the solution.

Answers

The molarity is moles/liters.

First, convert 4,000 mL to L:

4000 mL --> 4 L

Now, you must convert the 17 g of solute to moles by dividing the number of grams by the molar mass. The molar mass of AgNO3 is 169.87 g/mol:

17 / 169.87 = .1

Now that you have both the number of moles and the liters, plug them into the initial equation of moles/liters:

.1/4 = .025

The answer is 0.03 M

In a chemical equation, what name does the left side have

Answers

On the left side would be your reactants and the right would be your products

Describe the results of Ernest Rutherford's gold-foil experiment and explain how his results changed ideas about the distribution of positive charge within the atom.

Answers

Ernest Rutherford applies alpha particle towards an atom, some atom showed deflection by smaller angle, very few through large angle and many just passed without any deflection.

His results changed the idea for distribution of positive charges as he concluded almost all the positive charge is in center of the atom (inside nucleus) and it is very heavy than electrons which revolves outside the nucleus

Hope this helps!

Physicist Ernest Rutherford established the nuclear theory of the atom with his gold-foil experiment. When he shot a beam of alpha particles at a sheet of gold foil, a few of the particles were deflected. He concluded that a tiny, dense nucleus was causing the deflections.

If one body is positively charged and another body is negatively charged, free electrons tend to A. move from the negatively charged body to the positively charged body.
B. remain in the negatively charged body.
C. move from the positively charged body to the negatively charged body.
D. remain in the positively charged body.

Answers

I think the correct answer is A. If one body is positively charged and another body is negatively charged, free electrons tend to move from the negatively charged body to the positively charged body. This happens because they have different charges and therefore electrons are more attracted to the positive or its opposite charge.

Answer:

A. move from the negatively charged body to the positively charged body.

Explanation:

because this is the correct answer

Which pair of compounds are isomers?(1) NO2 and N2O4
(2) P2O5 and P4O10
(3) HCOOH and CH3COOH
(4) CH3OCH3 and C2H5OH

Answers

Answer: $CH_3OCH_3$ and $C_2H_5OH$

Explanation: The compounds having similar molecular formula but different arrangement of atoms or groups in space are called isomers and the phenomenon is called as isomerism.

$CH_3OCH_3$ and $C_2H_5OH$ are functional isomers which have same molecular formula but different functional groups attached.

(1) $NO_2$ and $N_2O_4$ are different compounds.

(2) $P_2O_5$ and $P_4O_(10)$ are different compounds.

(3) $HCOOH$ and $CH_3COOH$ are different compounds.

CH3OCH3 and C2H5OH are isomers. They have same molecular formula. But with another formation.

Which of the following is a single replacement reaction?Fe2O3 + 3H2O yields 2Fe(OH)3FeS + 2HCl yields FeCl2 + H2S
2Mg + O2 yields 2MgO
Mg + 2HCl yields MgCl2 + H2