CHEMISTRY MIDDLE SCHOOL

A ph less than 7 is an _, with __ numbers indicating stronger acids.

Answers

Answer 1

Answer:

A pH less than 7 is an acid, with number 1 indicating stronger acids

Explanation:

The pH scale has a range of 1 to 14. The following has been concluded on the pH scale:

1. Between 1 and 6 indicates an acid solution.

2. 7 indicates a neutral solution

3. Between 8 and 14 indicates an alkaline or basic solution.

Now with these information, we can answer the above questions as follow:

A pH less than 7 is an acid, with number 1 indicating stronger acids

Answer 2

Answer:

Final answer:

A pH less than 7 is an acid. Lower pH values mean stronger acids.

Explanation:

A pH less than 7 is considered an acid. The pH scale measures the concentration of hydrogen ions in a solution, therefore a lower number on the scale indicates a higher concentration of hydrogen ions and consequently a stronger acid. For example, lemon juice, with a pH of around 2, is much more acidic than black coffee, which has a pH of about 5.

Learn more about pH and acidity here:

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The winter is caused by __________. Which phrase best completes the sentence? indirect sunlight striking Earth Earth's far distance from the sun direct sunlight striking Earth Earth's closeness to the sun

Answers

Answer:

Earth's far distance from the sun

Explanation:

We have hot summers and cold winters because of the tilt of the Earth's axis. The tilt of the Earth means the Earth will lean towards the Sun (Summer) or lean away from the Sun (Winter) 6 months later.

Answer:

Earth's far from the sun?

Explanation:

Feel free to tell me if i was correct or not. :)

What technological development led to the discovery of the existence of subatomic particles?

Answers

Answer:

Thomson had discovered the first subatomic particle, the electron. Six years later Ernest Rutherford and Frederick Soddy, working at McGill University in Montreal, found that radioactivity occurs when atoms of one type transmute into those of another kind

Explanation:

you need to make 1.5L of 1.0M HCl from a stock solution of 12.0M HCl. How many L of the stock solution do you need?

Answers

Answer:

125 ml of HCl

Explanation:

The molarity of the stock solution to determine how many milliliters would contain 1.5 moles of HCl. Since a concentration of 12.0 mol/L means that you get 12.0 moles of hydrochloric acid per liter of solution,

Concentration of required HCl (C1) = 1.0M

Volume of required HCL (V1) = 1500 ml

Concentration of stock HCl (C2) = 12M

Volume of stock HCL (V2) = ?

C1V1 = C2V2

V2 = C1V1/C2 = 1*1500/12 = 125 ml

Muscle tissue is made up of cells that contract and release to produce movement. Which process provides the energy that the cells need to contract?A.respiration
B.meiosis
C.photosynthesis
D.mitosis

Answers

Answer:

The correct answer is A.respiration

Explanation:

Cellular respiration is a process which produces ATP (adenosine triphosphate) and methabolites. ATP is an "energy coin" which provides energy for biochemical processes in all cells. The other options are not correct: meiosis is the division process of sexual cells, mitosis is the division process of somatic cells and photosynthesis ocurrs in plant cells to obtain energy (not in animal cells of muscle tissue).

I think you mean miosis because mitosis is cell reproduction, photosynthesis is to do with light, respiration is breathing and meiosis is division of cells

How are electrical currents and magnetic fields related

Answers

Electric current produces a magnetic field. This magnetic field can be visualized as a pattern of circular field lines surrounding a wire.

What happens to paper chromatography in you leave it in water for too long?

Answers

Nothing, really, the paper itself just gets wet and thats it. One thing to be careful of is, though, is that the dye/pigment can get too diluted and it would be hard to distinguish each of them from each other.

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