If a water faucet drips 15.0 times per minute, how many gallons will pass into the drain in 2.25 years. Assume each drop = 0.20 mL

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Which of the following sets represents a pair of isotopes? 14C and 14N 206Pb and 208Pb O2 and O3 32S and 32S2-

Answers

Isotopes are substances that have the same number of protons but differ in the number of neutrons. Hence, the pair of isotopes above should be of the same element. In the given choices, 14C is not an isotope of 14N. 206Pb is an isotope of 208 Pb. O2 and O3 differ in molecular formula but still made up of same kind of atom, hence they are allotropes, while 32S and 32S2- are not isotopes.

What is the mass in grams of 2.0 moles of NO2

Answers

Answer:

The mass of 2 moles of NO₂ is 92 grams.

Explanation:

Given that,

Number of moles, n = 2 moles

We need to find the mass of 2 moles of NO₂. We know that the number of moles is given by the formula as :

$n=(m)/(M)$

m is the given mass

M is the molar mass of NO₂, $M=14+16* 2=46\ g$

$m=n* M\n\nm=2* 46\n\nm=92\ g$

So, the mass of 2 moles of NO₂ is 92 grams. Hence, this is the required solution.

Molar mass NO₂ = 46.0 g/mol

1 mole -------- 46.0 g
2.0 moles ----- ?

Mass (NO₂) = 2.0 x 46.0 / 1

=> 92.0 g

hope this helps!

The two forms of oxygen, O2(g) and O3(g), have(1) different molecular structures and identical properties
(2) different molecular structures and different properties
(3) identical molecular structures and identical properties
(4) identical molecular structures and different properties

Answers

Answer: option (2) different molecular structures and different properties.

Justification:

O₂(g) and O₃(g) are different forms of oxygen in gaseous state. That is what is called allotropes.

Allotropes are forms of the same element, in the same physical state (solid, liquid or gas), that have different structures and different properties.

O₂ (diatomic oxygen) and O₃ (ozone) are both gases at room temperature, but one molecule has 2 atoms and the other has 3 atoms. That make them different in structure and properties.

Another example of allotropes is graphite and diamonds.

Answer:

different molecular structures and different properties

Explanation:

The two forms of oxygen, O2(g) and O3(g) have different molecular structures and different properties

What occurs when an atom loses an electron?(1) The atom’s radius decreases and the atom becomes a negative ion.
(2) The atom’s radius decreases and the atom becomes a positive ion.
(3) The atom’s radius increases and the atom becomes a negative ion.
(4) The atom’s radius increases and the atom becomes a positive ion.

Answers

When an atom loses an electron, it becomes a positive ion and the radius of the atom decreases. The correct answer is option 2.

An atom is the basic unit of matter that consists of a nucleus, which contains positively charged protons and uncharged neutrons, surrounded by a cloud of negatively charged electrons.

The valence shell determines the size of the atom, and when an electron is removed from this shell, the size of the atom decreases. The loss of an electron from an atom creates a positively charged ion, called a cation.
The cation has a smaller radius than the neutral atom because the positive charge on the cation attracts the remaining electrons more strongly, pulling them closer to the nucleus.

Therefore, option 2. The atom’s radius decreases, and the atom becomes a positive ion is the correct answer.

Learn more about atom here:

brainly.com/question/1566330

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Answer:

When an atom loses an electron, the atom's radius decreases and the atom becomes a positive ion.

Which net change occurs in a nuclear fusionreaction?
(1) Ionic bonds are broken.
(2) Ionic bonds are formed.
(3) Energy is converted to mass.
(4) Mass is converted to energy.

Answers

The correct answer would be option 4. Fusion reaction is a type of nuclear reaction where two or more nuclei combine or collide to form an element with a higher atomic number. This happens when the collision is in a very high speed. In this process, some of the matter of the fusing nuclei is converted to energy.

In terms of the sequence of the scientific method what is the immediate purpose of doing an experiment?

Answers

The correct answer should be something like gathering data or similar.

You conduct experiments to test a hypothesis and then gather the data and analyze it to see whether the hypothesis is correct.

Answer:

gathering data

Explanation:

When you do an experiment you want to gather information to make a conclusion on your hypothesis.......-

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Select the correct answer from each drop-down menu.Much of the mass of an atom is concentrated in its nucleus. The nucleus contains (blank), and the outer part of the atom contains (blank)

Two pieces of silk have an electric charge after being rubbed on a piece of amber. What will happen when the two silk pieces are brought close together?A.They will repel one another. B. They will attract one another. C. They will transfer their electrons from one to the other. D. They will not affect one another.

Water is called the “universal solvent.” Which statement best explains this description with respect to ionic compounds?

Oceans, lakes, ice caps, streams, and clouds are considered to part of what?A. BiosphereB. AthenosphereC. HydrosphereD. Geosphere