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d1i1m1o1n [39]
3 years ago
15

Why should scientists perform experiments? A. To understand a hypothesis B. To answer questions about right and wrong C. To answ

er specific questions D. To impress their coworkers
Chemistry
1 answer:
marta [7]3 years ago
4 0

Answer:

C

Explanation:

they need to do this experiments in order to answer the questions the have though this experiments they can learn more and get more knowledge

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In the gold foil experiment, what was observed
natima [27]

Rutherford's Gold Foil Experiment proved the existence of a small massive center to atoms, which would later be known as the nucleus of an atom. Ernest Rutherford, Hans Geiger and Ernest Marsden carried out their Gold Foil Experiment to observe the effect of alpha particles on matter.

8 0
3 years ago
Matter is made up of heat energy and ___________energy?
ella [17]
You’re correct, matter is made up of heat energy and chemical energy

all matter contains heat because it is the result of the movement of atoms, molecules, or ions in solids, liquids, and gases.

all matter also contains chemical energy. chemical energy is stored in the bonds of chemical compounds so atoms and molecules are held together by chemical energy

hope this helps :)
3 0
2 years ago
If element x has 72 protons, how many electrons does it have? electrons
saw5 [17]
Elements have neutral charges such as Na so if X has 72 protons + charges then it must also have 72 electrons with - charges

hope that helps
6 0
3 years ago
Which of the following is not a property of a buffer solution? a) It is a mixture of a weak acid and its conjugate base. b) Resi
m_a_m_a [10]

Answer:

e) pH is independent of concentration.

Explanation:

a) It is a mixture of a weak acid and its conjugate base. <em>TRUE. </em>A buffer is defined as a mixture of a weak acid and its conjugate base or a weak base and its conjugate acid.

b) Resists pH changes because it reacts with added acid or base. <em>TRUE. </em>Thermodynamically, the reaction of added acid or base is faster with the buffer mixture than with H⁺ or OH⁻ ions of the solutions.

c) The maximum buffer capacity is at pH = pKa. <em>TRUE. </em>The buffer capacity is pka±1. For this, buffer capacity is maximum in pka.

d) pH is dependent on the solution ionic strength and temperature. <em>TRUE.</em> Ionic strength and temperature are factors that influence concentrations of ions in solutions as the H⁺ ion that is the responsible

e) pH is independent of concentration. <em>FALSE. </em>pH in a buffer depends completely of concentrations of the acid and its conjugate base or vice versa.

I hope it helps!

8 0
3 years ago
Any GUY wanna talk im bore.d
harina [27]

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ⁿᵘ ᵗʰˣ ⁱᵐ ᵃ ᵍᵘʳˡ -.-

6 0
2 years ago
Read 2 more answers
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