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Illusion [34]
3 years ago
11

There are several different insecticides sold at your local home and garden store. They all claim to be safe for use around anim

als and children, but you want to be sure of this safety before you use one of the products at your own home. What would be the best way to be sure of the scientific reliability of these safety claims? Ask an employee of the store for her recommendation. Look up results of tests conducted by environmental agencies. Check for endorsements by celebrities of home-improvement shows. Use the sales records to determine which product is most popular.
Chemistry
2 answers:
Dovator [93]3 years ago
5 0
Look up results of tests conducted by environmental agencies is the most logical answer in my opinion.
deff fn [24]3 years ago
5 0

Answer:

The correct answer is "look up results of tests conducted by environmental agencies"

Explanation:

The only way to ascertain/disprove a claim is to conduct an experiment in the light of the claim but in this case, it will be very expensive to carry out experiments on all insecticides claiming to be safe for use around animals and children. The most reliable and cost effective thing to do is to <u>check out environmental agencies and see there results on tests they have independently carried out on these insecticides to make an informed conclusion</u>.

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g A laboratory analysis of an unknown compound found the following composition: C 75.68% ; H 8.80% ; O 15.52%. What is the empir
sammy [17]

Answer:

THE EMPIRICAL FORMULA FOR THE UNKNOWN COMPOUND IS C7H9O

Explanation:

The empirical formula for the unknown compound can be obtained by following the processes below:

1 . Write out the percentage composition of the individual elements in the compound

C = 75.68 %

H = 8.80 %

O = 15.52 %

2. Divide the percentage composition by the atomic masses of the elements

C = 75 .68 / 12 = 6.3066

H = 8.80 / 1 = 8.8000

O = 15.52 / 16 = 0.9700

3. Divide the individual results by the lowest values

C = 6.3066 / 0.9700 = 6.5016

H = 8.8000 / 0.9700 = 9.0722

O = 0.9700 / 0.9700 = 1

4. Round up the values to the whole number

C = 7

H = 9

O = 1

5 Write out the empirical formula for the compound

C7H90

In conclusion, the empirical formula for the unknown compound is therefore C7H9O

7 0
3 years ago
What are the three types of Carbohydrates?
Doss [256]

The major classes are monosaccharides, oligosaccharides and polysaccharides.

The types are sugar, starch, and fibersugar.

Hope I helped!!

3 0
3 years ago
How many moles are in 7.00E24 atoms of Ca?
iris [78.8K]

Explanation:

In chemistry, a mole is the base unit of the amount of substance in a system containing elementary entities (atoms, molecules, ions, electrons), and one mole of substance corresponds to the Avogadro's constant or 6.023 \ \times \ 10^{23}  entities. The stoichiometry equation that relates the amount of substance into the measurement in moles is

                                                           n \ = \ \displaystyle\frac{\alpha}{N_{A}},

where n is the number of moles, \alpha is the amount of substance and N_{A} is the Avogadro's constant.

Therefore,

                                           n \ = \ \displaystyle\frac{7.00 \ \times \ 10^{24} \ \text{atoms}}{6.023 \ \times \ 10^{23} \ \text{atoms mol}^{-1}} \\ \\ n \ = \ 11.624 \ \text{mol}.

3 0
3 years ago
2C3H7OH + 9O2 -&gt; 6CO2 + 8H2O
MAVERICK [17]

Answer:

Up to 18\; \rm mol \rm CO_2.

Explanation:

The equation for this reaction: 2\; \rm C_3 H_7 OH + 9\; O_2 \to 6\; CO_2 + 8\; H_2O is indeed balanced.

Notice that the coefficient of \rm C_3 H_7 OH is 2 while that of \rm CO_2 is 6.

Therefore, each unit of this reaction would consume 2 units of \rm C_3H_7OH while producing 6 units of \rm CO_2. In other words, this reaction would produce three times as much \rm CO_2\! as it consumes \rm C_3H_7OH\!.

If all that 6\; \rm mol of \rm C_3H_7OH molecules are actually consumed through this reaction, three times as many \rm CO_2 molecules would be produced. That corresponds to 3 \times 6\; \rm mol = 18\; \rm mol of \rm CO_2\! molecules.

6 0
3 years ago
What happens in a chemical reaction?
MAXImum [283]
The correct answer is option C
3 0
3 years ago
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