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3 years ago

What is an isotope?

1 answer:

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Answer:The answer is C:two or more forms of an atom that contain different numbers of neutrons. An isotope is when there are different forms of an atom, in terms of neutrons. Not to be confused with cations or anions, which are atoms with a difference of electrons or protons, making them charged.

Explanation: I took chemistry in 6th grade.

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If approximately equal volumes of an acid and a base of equal strengths are combined, the resulting solution should have a pH of

Masja [62]

Answer : The resulting solution will have a pH of 7.

Explanation:

Whenever acid and base reacts with each other to form water molecule is called Neutralization reaction. This water molecules is formed from the hydronium ion ( $H^+$ ) from acid and hydroxide ion( $OH^-$ ) from base.

When the equal volumes of acid and base of equal strength are combined, the resulting pH of the solution becomes 7.

The pH 7 value means that the solution is neutral.

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3 years ago

Read 2 more answers

Which of the following metals will dissolve in ice water?

Pani-rosa [81]

Answer:

I think the answer would be sodium

3 0

2 years ago

Read 2 more answers

Calculate how many moles of NH3 form when each quantity of reactant completely reacts according to the equation:

Leya [2.2K]

<span>1) Use the balanced chemical equation to find the molar ratios (proportions) of each product and reactant.

3N2H4(l)→4NH3(g)+N2(g)

=> molar ratios: 3 mol N2H4 : 4 mol NH3

2) Use the product to reactant molar ratio, and the quantity of reactant to determine the yield:

2.0 mol N2H4 * [4mol NH3] / [3mol N2H4] = 2*4/3 mol NH3 = 2.7 mol NH3

Answer: 2.7 mol

</span>

8 0

3 years ago

Make a neutral Beryllium atom by adding protons, neutrons and electrons. Now, what would you do to make a

Alenkinab [10]

Answer:

4 protons, 5 neutrons, 4 electrons to have the neutral Be atom

the only way to make a negative Be is to have more than 4 electrons

Explanation:

Make a neutral Beryllium atom by adding protons, neutrons and electrons. Now, what would you do to make a

beryllium atom with a negative charge?

Be has an atomic number of 4, an atomic mass 9

its atomic number tells us it has 4 protons, with a +4 charge

its atomic mass = neutrons + protons, so it has 5 neutrons with no charge

its neutral atom will have 4 electrons each with a negative charge to balance the +4 total proton harge.

4 protons, 5 neutrons, 4 electrons to have the neutral Be atom

to make a negative Be species, it still must have an atomic number of 4,

or it is not Beryllium

so the only way to make a negative Be is to have more than 4 electrons

3 0

2 years ago

GO FAST / WILL MARK BRAINLIEST / WILL GIVE THANKS / WILL GIVE 5 STARS

Nikitich [7]

<h2>question 1</h2>

Mg + 2HCl→ MgCl2 + H2

after balancing the coefficient for H2 is 1

<em><u>explanation </u></em>

since 1 is in front of H2 it is the coefficient for H2

question 2

the reaction is single replacement

<u><em>explanation</em></u>

because single replacement occurs when one element replaces another.
for the reaction of Mg + 2HCl→MgCl2 +H2 Chlorine

<h2> Question 3</h2>

The coefficient of H2 is 3

<em><u>explanation</u></em>

from the balanced chemical reaction
that is N2 +3H2 →2NH3 the coefficient in front of H2 is 3

<h2 /><h2> question 4</h2>

N2 + 3H2 → 2NH3 is a synthesis reaction

<u><em>explanation; </em></u>

Synthesis reaction occurs when two or more reactants combine to form a single product.

N2 reacted with H2 to form NH3 (ammonia) hence it is an example of synthesis reaction.

<h2>question 5</h2>

The sign that shows that a chemical reaction has occurred is color change, change in temperature and formation of a gas (bubble)

color change change in temperature, formation of precipitate and formation of a gas(bubble) is always an indicator of an occurrence of a chemical change.

<h2>Question 6</h2>

H2S is not a strong acid

<u><em>explanation</em></u>

strong acid undergo a complete electrolysis when dissociate in water for example HNO3
weak acid undergo a partial electrolysis when dissociate in water for example H2S

<h2>question 7</h2>

feels slippery is not a property of an acid

<u><em>explanation</em></u>

feel slippery is an example of a base
The properties of an acid are

sour taste
changes the color of an indicator
usually react with metal among others

<h2> Question 8</h2>

detergent with a PH of about 10 is a <u><em>basic</em></u>

<em><u>explanation</u></em>

Base has a Ph which range from 7.1 to 14
since the detergent has a PH of 10 is a basic

<h2>Question 9</h2>

The balanced chemical equation for the synthesis of NaBr is

2Na + Br2 →2 NaBr

<u><em>explanation</em></u>

This is because the equation obey the law of mas conversation

for example it has 2 atoms of Na in both reactant and product side

<h2>Question 10</h2>

reacts with metals is not a common property of a base

<u><em>Explanation</em></u>

base has

bitter taste,
feels slippery
turn red litmus paper blue among others

<h2> question 11</h2>

Hydrochloric acid have a PH in 0-6 range

<u><em>explanation</em></u>

HCl is a strong acid

acid has a PH which are below PH of 7 hence HCl has a PH which range from 0-6

<h2>Question 12</h2>

A brand shampoo which has a PH between 5 -6 is a weak acid

generally acid has a PH below 7
weak acid has a PH of between 5 -6 therefore brand shampoo is a weak acid

<h2>question 13</h2>

The PH that indicate a solution of a base is a PH of 12

<em><u>Explanation</u></em>

base has a PH which range between 7-14, hence a PH of 12 indicate that it is a Base

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2 years ago