In every balanced chemical equation each side of the equation has the same number of
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For example(This is random)
2C + 2O = 2C2O
I still have 2 Carbon and 2 Oxygen atoms after the reaction.
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Which type of change must occur to form a compound? (1) chemical (3) nuclear(2) physical (4) phase?
Which element has an atom with the greatest attraction for electrons in a chemical bond? A) As B) Bi C) N D) P
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Explanation:
Potassium Iodide -
It is a salt , which is made of the ions of potassium and iodine ,
Potassium being the cation , and iodide being the anion .
The ions of this salt are held by strong ionic forces , which hold the ions together very strongly .
Hence , a lot of energy is required to melt the salt , as the bond between the ions is very strong .
Hence , the melting point of this salt , i.e. , Potassium Iodide , is very strong .
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Answer:
molality of sodium ions is 1.473 m
Explanation:
Molarity is moles of solute per litre of solution
Molality is moles of solute per kg of solvent.
The volume of solution = 1 L
The mass of solution = volume X density = 1000mL X 1.43 = 1430 grams
The mass of solute = moles X molar mass of sodium phosphate = 0.65X164
mass of solute = 106.6 grams
the mass of solvent = 1430 - 106.6 = 1323.4 grams = 1.3234 Kg
the molality =
Thus molality of sodium phosphate is 0.491 m
Each sodium phosphate of molecule will give three sodium ions.
Thus molality of sodium ions = 3 X 0.491 = 1.473 m
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Filling in the 20 word ruleeeeeeee jejene jejjene
Answer: yes
Explanation: they contain sodium, potassium, chloride, bicarbonate, calcium, phosphate, magnesium, copper, zinc, manganese, molybdenum, copper, and chromium also.
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1.) Determine the grams of carbon and hydrogen from the given data.
C: 23.98 g x (12.011 g / 44.01 g) = 6.54 g C
H: 4.91 g x (2.0158 g / 18.02 g) = 0.55 g H
Determine the grams of oxygen in the sample by subtracting the mass of the compound given from the total mass solved earlier.
O: 10.0 - (6.54 + 0.55) = 2.91 g O
2) Convert the values in step 1 to moles.
C: 6.54 g / 12.01 g / mol = 0.54 mol
H: 0.55 g / 1.01 g/mol = 0.54 mol
O: 2.91 g / 16.00 g/mol = 0.18 mol
3) Divide each by the lowest value calculated in step 2
C: 0.54 mol / 0.18 mol = 3
H: 0.54 mol / 0.18 mol = 3
O: 0.18 mol / 0.18 mol = 1
Thus, the empirical formula is C3H3O.
b. air pollution
c. fertilizer use
d. none of the above
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Meat contamination because humans do not eat air or fertilizer so meat contamination is the only logical answer.
- - Answer: A
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A lithium cation ion is smaller than a lithium atom. In lithium cation it has lost electrons, which causes the remaining electrons to be pulled in stronger by the positive charge in the nucleus. As they get closer to the nucleus decreases the overall size of the atom.
The bigger they are (the more electrons it has) the less effective the proton's pull will be. So if we were talking about a lithium anion (where electrons are gained) then it would be bigger than a lithium atom.
Lithium cation and Lithium atom can be compared as follow;
1) Charge:
The charge on Lithium atom is zero means, it has same number of protons and electrons. Hence, the nert effect is cancelled out and the atom gets zero charge.
On the other hand, Lithium cation is formed when it looses one electron. Therefore, the number of protons are greater by one number as compared to number of electrons resulting in the formation of +1 charge as shown below,
Li → Li⁺¹ + e⁻
2) Size:
Secondly, Lithium atom has greater size as compared to Lithium cation because due to presence of greater number of protons compared to electrons in Lithium cation the nuclear charge appears to be greater as compared to neutral atom hence, pulling the valence electrons more effectively making the lithium cation smaller in size as compared to neutral atom.
3) Reactivity:
We can also compare the reactivity of both species. The neutral will be more reactive than the charged atom because it is containing one valence electron and can donate it when ever it comes in contact with non-metals.