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solong [7]
3 years ago
7

The student is now told that the four solids, in no particular order, are calcium bromide (CaBr2), sugar (C6H12O6), benzoic acid

(C6H5COOH), and potassium bromide (KBr). Assuming that conductivity is correlated to the number of ions in solution, rank the four substances based on how well a 0.20 M solution in water will conduct electricity.
Please list from Most Conductivity to Lease Conductivity in order (the ones I am typing out are in a random order):

calcium bromide
sugar
potassium bromide
benzoic acid
Chemistry
2 answers:
IceJOKER [234]3 years ago
8 0
Ca2Br
KBr
C6H5COOH (benzonic acid)
C6H12O6 (sugar)
nataly862011 [7]3 years ago
3 0
<h2>Answer : The order of conductivity from most conductive to least is this - </h2><h2>Calcium bromide (CaBr_{2}), Potsassium bromide (KBr), Benzoic acid C_{6}H_{5}COOH and last is sugar.</h2><h3>Explanation : </h3>

When dissolved in water  (CaBr_{2}) produces three ions namely; Ca^{+2} and 2Br^{-} which acts as best conductor amongst the given choices.

Next is potassium bromide when dissolved in water generates only two ions which are K^{+} and Br^{-} and acts as an conductor.

Benzoic acid C_{6}H_{5}COOH, is a weak acid and is slightly ionized so it acts as an weak conductor.

Sugar is a non ionized compound so it is anon conductor.

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Webb has calculated the percent composition of a compound. How can he check his result?
fenix001 [56]
Webb has calculated the percent composition of a compound. He can check his result by adding them to see if they equal up to 100. Why? Well, percent composition tells the quantity of elements with 100 as a base of total amount. This means that it will have to add to 100 to check the result. You would add up all of the values of percent composition of elements to see if they equal 100, and if they do, the results are accurate.

Your final answer: Webb can check his result by seeing if they add up to 100, considering that is the base total quantity.
7 0
1 year ago
What type of compound is Sodium hydroxide?<br> A.acid<br> B.base<br> C.element<br> D.salt
morpeh [17]
The answer is B
b base
3 0
2 years ago
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a substance is analyzed to have a percent composition of 74.186% sodium and 25.814% fluorine. calculate the empirical formula
Novosadov [1.4K]

Answer:

Na₂₆F₁₁

Explanation:

We find the moles of the substance assuming 100 g of the substance is present. Why do we take 100 g? Because then the percent of sodium/fluorine, would be the g of sodium/fluorine respectively:

74.186 g Sodium | 1 mol Sodium/23 g              =>       3.2255 mol Na    

25.814 g Fluorine | 1 mol Fluorine/19 g             =>       1.3586 mol F

Divide each by smallest number of moles:

3.2255/1.3586 = 2.37

1.3586/1.3586 = 1

Multiply by common number to get a smallest whole number:

2.37*11 = 26,

1*11 = 11

The empirical formula is Na₂₆F₁₁

5 0
2 years ago
Density,mass,volume: Is the amount of matter a substance has
LuckyWell [14K]
Density is the mass of a substance per unit volume. Volume is the amount of space an object occupies. Chemical properties- These are properties that can only be observed by changing the identity of the substance

Hope it helped ya out!
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3 years ago
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aivan3 [116]

Answer: The correct answer is option B.

Explanation: There are 7 elements in group VIII-A. They are Helium (He), Neon(Ne), Argon(Ar), Krypton (Kr), Xenon (Xe), Radon (Rn) and Ununoctium (Uuo). They are considered as a part of group 18.

Metals are shown in purple color in the periodic table. Metalloids as blue color and Non-metals are shown in green color.

Group VIII-A elements have fully filled orbitals and hence are most stable amongst all the elements in the periodic table. They are considered as least reactive elements and as they are categorized as non-metals. So, they are the least reactive non-metals.

Therefore, the correct option is B.

7 0
2 years ago
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