Given the balanced equation:I + I==> I2
Which statement describes the process represented by this equation?
(1) A bond is formed as energy is absorbed.
(2) A bond is formed and energy is released.
(3) A bond is broken as energy is absorbed.
(4) A bond is broken and energy is released.

Answers

Answer 1

Answer: The answer is (2) A bond is formed and energy is released. The left side of equation is I atom and the right side of equation is I2 molecule. So the bond is formed between I atom to form I2 molecule. And forming bond will release energy while breaking bond will absorb energy.

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Why do comets have tails

Answers

Answer:

Comets are composed of ice, dust and frozen gases. The core of the comet is known as nucleus which is formed of rocks and frozen gases. Coma is the atmosphere of the comet. As the comet enters the inner solar system, the coma expands due to sublimation of frozen gases. As it nears the sun, the coma extends backwards and forms a long tail. It extends backwards due to the solar wind. The charged particles from the sun take away the evaporated material and dust of the comet backwards forming tail.

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2C6H14 + ______ O2 → 12CO2 + 14H2O What is the coefficient of O2 when the equation is completely balanced using the smallest whole-number coefficients?

Answers

Answer:

The coefficient of O2 when the equation is completely balanced is 19

Explanation:

The law of conservation of matter states that since no atom can be created or destroyed in a chemical reaction, the number of atoms that are present in the reagents has to be equal to the number of atoms present in the products.

Then, you must balance the chemical equation. For that, you must first look at the subscripts next to each atom to find the number of atoms in the equation. If the same atom appears in more than one molecule, you must add its amounts

Left side: 6 carbon, 14 hydrogen and 2 oxygen.

Right side: 1 carbon, 2 hydrogen and 3 oxygen.

The coefficients of each molecule below indicate the amount of each molecule for the reaction. This coefficient can be modified to balance the equation, just as you should never alter the subscripts.

By multiplying the coefficient mentioned by the subscript, you get the amount of each element present in the reaction. So, in this case you can see that in the reaction there is:

Left side: 2*6=12 carbon, 2*14=28 hydrogen and COEFFICIENT OF OXYGEN*2=? oxygen.

Right side: 12*1=12 carbon, 14*2=28 hydrogen and 12*2+14*1=38 oxygen.

As mentioned, you must have the same amount of each element on both sides. In this case, carbon and hydrogen have the same amount on both sides, so it only remains to balance the oxygen. For that, you must calculate the "OXYGEN COEFFICIENT" on the left side of the equation so that there are 38 oxygen atoms, just like the right side. This is expressed as:

COEFFICIENT OF OXYGEN*2=38

From the previous expression you can obtain:

COEFFICIENT OF OXYGEN=19

So, the coefficient of O2 when the equation is completely balanced is 19

hello,
2C6H14+19O2⇒12CO2+14H2O

A force of 1 700 N is applied to a 1 300 kg car. what is the magnitude of acceleration of the car?

Answers

Hello!

Answer:

$\Large \boxed{\sf 1.30 m/s^2}$

Explanation:

→ The force applied to an object is equal to:

$\sf a = F / m$

Where:

- a is the acceleration

- F is the force

- m is the mass

→ So, the acceleration of the car is equal to:

$\sf a = F / m \n\n= 1700 N / 1300 kg\n\n \approx 1.30 m/s^2$

Conclusion:

The acceleration of the car is 1.30m/s².

Explanation:

acceleration is directly proportional to the force and inversely proportional to the mass of the object

a=f/m

=1700/1300

Enzymes are proteins that speed up chemical reactions in the body how do they workA. they increase the surface area of reactants
B.they increase the concentration of reactants
C.they decrease the concentration of products
D. They act as reactants

Answers

The answer would be D, Enzymes are soluble protein molecules that can speed up chemical reactions in cells. These reactions include respiration, photosynthesis and making new proteins. For this reason enzymes are sometimes called biological catalysts.

Answer:

D) They act as reactants

Explanation:

I took the test.

Hope this helps!!

How many moles of atoms are in 2.00 g of 13c?

Answers

There are 0.154 moles of atoms in 2.00 g of carbon-13.

Further Explanation:

Moles, Atomic mass and Molecular mass

1 mole of a pure substance contains a mass that is equal to the relative atomic mass or molecular mass of the substance.

Therefore; molar mass is given as grams per mole of a substance

Hence;

Molar mass = mass of a substance/ Number of moles

g/mol = g /mole

Thus;

M = m/n; where M is the molar mass, m is the mass and n is the number of moles

From this relationship we can therefore, calculate mass by multiplying the number of moles by molar mass of a substance.

That is; Mass = moles x molar mass

To calculate number of moles;

We have; n = m/M

Number of moles = Mass of the substance/ Molar mass

In our case;

Mass = 2 g of Carbon-13

Molar mass = 13.0 g/mol

Since; Number of moles = Mass/ molar mass

Thus;

Moles = (2.0 g)/ (13.0 g/mol)

= 0.154 moles

Keywords: Moles, Molecular mass, relative atomic mass

Learn more about:

Relative atomic mass: brainly.com/question/11096711
Moles calculation: brainly.com/question/9709257
Molar mass: brainly.com/question/8992028

Level: High school

Subject: Chemistry

Topic: Moles

Sub-topic: Moles, molecular mass and mass of a pure substance.

What role do aquifers play in the water cycle

Answers

A aquifer is the underground layer which is composed of water-bearing rocks. Sandstone, sands, gravel, and other sedimentary rocks are examples of water-bearing rocks. They are permeable and have openings that gases and liquids can pass through. In a water cycle, a water will be added to the aquifer during the precipitation.

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