CHEMISTRY HIGH SCHOOL

True or False: Changes in states of matter indicate a chemical change.

Answers

Answer 1
Answer:

False, changes in matter indicate a physical change.
Answer 2
Answer:

Answer:

False

Explanation:

Changes in state of matter indicates a physical change. Always remember these learning tools:

For Physical Changes:  

S - Size, Shape, State

For Chemical Changes:

Odor  Color  Bubbles/Gas  Light  Temperature  Precipitate

Ol'    Country  Boys/Girls     Like         Their           Pickups

Hope this helps!!!❤️

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What is an ion? Please, give an example.

Answers

an atom or molecule with a net electric charge due to the loss or gain of one or two electrons is known as ion . 
ions are of two types 
1. cations ( positive ion )
2. anion (negative ion )
for e.g Al³+
An Atom is electrically neutral with a charge equal to 0, because it have the same number of protons and electrons.
In ion is an atom who lose or gain electrons. When it lose an electron, the number of protons will be higher than then number of electrons in an normal atom, and will be called positive ion or cation. 
Example: The Aluminium lose 3 electrons. So the ion of Al will be Al^(3+), and its charge is 3+
Ionization equation: Al -----\ \textgreater \ Al^(3+) + 3^(e-)
And When an ion gain electrons, the number of electrons will be higher than the number of protons in an normal atom, and will be called negative ion, or Anion..
Example: the Chloride gain 1 electron. So the ion of Cl is Cl^(1-), and its charge is 1-
Ionization equation: Cl + 1^(e-) ----\ \textgreater \ Cl^(1-)

HOPE THIS HELPS :D

How many muffins can the above recipe produce if 60 ml is required for each muffin?

Answers

To determine how many muffins can be produced with the given recipe, where 60 ml of batter is required for each muffin, you need to calculate the total volume of batter produced and then divide it by the volume required for each muffin.

The recipe produces a total of 2 liters of batter (2000 ml). Now, divide this total batter volume by the volume required for each muffin (60 ml per muffin):

Total muffins = Total batter volume (ml) / Volume per muffin (ml)
Total muffins = 2000 ml / 60 ml/muffin ≈ 33.33 muffins

Since you cannot have a fraction of a muffin, you can produce approximately 33 muffins with the given recipe.

Based on the results of testing colorless solutions with indicators, which solution is most acidic?(1) a solution in which bromthymol blue is blue
(2) a solution in which bromcresol green is blue
(3) a solution in which phenolphthalein is pink
(4) a solution in which methyl orange is red

Answers

On litmus paper (the slip of paper that changes color to measure acidity), the redder the color is, the more acidic it is. 
Therefore, the solution that is most acidic is methyl orange because it was a darker red then any of the others.

Answer: Methyl Orange (#4)

Hope this helped!! :D
Bromothymol blue is blue in a basic solution (yellow in acid).Bromocresol green is blue in a basic solution (yellow in acid).
Phenolphthalein is pink in a basic solution (colorless in acid).Methyl orange is red in an acidic solution. Therefore, the most acidic solution is #4.

How many protons does the element cobalt (Co) have? 27 32 58.93 59

Answers

cobalt has 27 Protons

When a substance freezes, what happens to the mass? The mass stays constant as it changes from a liquid to a solid.

The mass increases as it changes from a liquid to a solid.

The mass decreases as it changes from a liquid to a solid.

There is no mass once the substance becomes a solid

Answers

The correct answer is the first statement. The mass stays constant as it changes from a liquid to a solid. According to the Law of Conservation of Mass, mass is conserved. It is not created nor destroyed. Therefore, as the substance turn into solid, all of the substance goes only to the solid phase.
The mass stays constant as it changes from a liquid to a solid

A particle has 5 protons, 6 neutrons, and 5 electrons. What is its net charge.

Answers

It would have a zero charge because it is a neutral atom. The number of electrons which is a negative charge is equal to the number of protons which is positive, they will cancel each other out hence meaning it will become neutral
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