Answer:
sodium bromide (NaBr) potassium hydroxide (KOH) magnesium chloride (MgCl2) silicon dioxide (SiO2) sodium oxide (Na2O)
Explanation:
Answer:
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<span>The amount of
protons is equal to the number of electrons of a chemical element. The atomic
number of an element also determines the number of the protons it contains.
The number of protons is also the same number of electrons. Protons are positively charged, electrons are
negatively charged. To get the number of neutrons, all you need is to deduct
the number of the atomic mass or mass number from the atomic number. Potassium has 19
protons, therefore has 19 electrons as well. The atomic mass of Potassium is
39. So, the number of neutrons Potassium has is 20. </span>
Potassium
Atomic
number: 19
Protons: 19
Electrons: 19
Atomic Mass:
39
Neutron: 20
Nitrogen
Atomic
number: 7
Protons: 7
Electrons: 7
Atomic Mass:
14.007
Neutrons: 7
Oxygen
Atomic
Number: 8
Protons: 8
Electrons: 8
Atomic Mass:
15.99
Neutrons: 8
To find joules (heat) we use the following formula
heat= mass x specific heat x ΔT
mass= 72.5 grams
specific heat (Water)= 4.184 j/g·C
ΔT= 95 - 28= 67 °C
heat= (72.5 grams) (4.18 j/g·C) (67°C)= 20300 joules or 20.3 Kilojoules
For any mixture of solvent with a solid solute, there is a maximum amount of solute that can be dissolved ( When the solution is saturated )
