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ikadub [295]
3 years ago
9

Which sequence contains elements listed from most reactive to least reactive?

Chemistry
1 answer:
maxonik [38]3 years ago
6 0

Answer:

Transition metals, alkali metals, alkaline earth metals Transition metals - Middle of the periodic chart, only average reactivity. alkali metals - As mentioned above, very reactive. Bad choice, going from lower reactivity to higher reactivity.

Hope this answer is right!

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Calculate the mass in grams of calcium carbonate present in a 50.00 mL sample of an aqueous calcium carbonate standard, assuming
Assoli18 [71]
The units of ppm means parts per million. Also, It is equivalent to milligrams per liter. It is one way of expressing concentration of a substance. It u<span>sually used to describe the concentration of something in water or soil. We calculate the mass of CaCO3 as follows:

Mass = 75 mg/L (.050 L) = <span>3.75 mg CaCO3</span></span>
7 0
3 years ago
QUICK WILL MARK BRAINIEST!!!! The general formula for an acid is (__n ___) where _____ stands for hydrogen, n stands for the ___
Olenka [21]

Answer:

The general formula for an acid is HnX where H stands for hydrogen, n stands for the number of hydrogen ions, and X stands for the monatomic or polyatomic ions ( since those are negative charged ions, they are called anions).

Explanation:

The general formula for an acid is HnX) where H stands for hydrogen, n stands for the number of hydrogen ions, and X stands for the monatomic or polyatomic ions ( since those are negative charged ions, they are called anions).

An example is H2SO4, also called sulfuric acid

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X fro H2SO4 is SO42-, it's a polyatomic ion. Since it has a negative charge of 2- it needs 2 hydrogen atoms to bind and form H2SO4

4 0
3 years ago
1. A student has a petri dish packed with a layer of marbles. Which of the following activities should the student perform to de
Sindrei [870]

Answer: A.) Removing a few marbles from the petri dish and stirring the rest around as energy is added

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According to Charle's law the volume is directly proportional to the temperature of the gas at constant pressure and constant number of moles.

V\propto T    (At constant pressure and number of moles)

Thus as temperature of the gas increases , the volume also increases, and the density decreases. the gas becomes lighter and thus rises up.

7 0
3 years ago
Which of the following elements has 3 electrons in the 2p sublevel?
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Answer:

the answer is D. N

<em>AP3X</em>

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