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iren2701 [21]
3 years ago
9

Ava’s best friend has an indoor cat. Ava notices that she sneezes every time that she visits her friend. Ava suspects that she i

s allergic to cats but is unsure. What is the best thing for Ava to do next?
Stop visiting her friend.
Conclude that she is allergic to cats, and avoid them completely.
Test her suspicion by going to see an allergist to diagnose the allergy.
Assume that the sneezing has another cause, and reject her original idea.
Chemistry
1 answer:
zlopas [31]3 years ago
7 0

Answer:

I say for her to test her suspicion by going to see an allergist to diagnose the allergy.

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Hydroxylamine and pyridine

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A volume of a fixed gas is doubled and the temperature is doubled. What happens to the pressure of the gas?
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Which piece of glassware shown below is used to hold and dispense a solution of known concentration during a titration?
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2 years ago
How can the rate of this reaction be increased
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2 years ago
Household bleach is an aqueous solution of sodium hypochlorite (NaClO), and its concentration is often measured as a percent by
stira [4]

Answer:

The correct answer is 0.033 M

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5% w/w=  5 g NaClO/100 g solution

The first dilution is 10 ml of solution in 100 ml. That is a 1/10 dilution (10ml/100 ml= 1/10). That means we are diluting 10 times the solution. We can calculate the resulting concentration after this first dilution as follows:

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Then, we take 6 ml of 0.5% w/w solution and we add 6 ml of dye in a reaction vessel. The total volume of the solution in the reaction vessel is 6 ml + 6 ml= 12 ml, and we are diluting twice the solution because 6 ml/12 ml= 1/2. We can calculate the resulting concentration of the solution after this second dilution as follows:

0.5% w/w x 6 ml/12 ml= 0.5% w/w/2= 0.25%w/w

Finally, we need to convert the concentration from %w/w to M (mol solution/1L solution). For this, we assume a density of the solution close to the density of water (1.00 g/ml) and we use the molecular weight of NaClO (74.44 g/mol):

0.25 g NaClO/100 g solution x 1 mol NaClO/74.44 g x 1.00 g solution/1 ml x 100 ml/0.1 L= 0.033 mol/L

= 0.033 M

3 0
3 years ago
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