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lakkis [162]
3 years ago
12

Scientists at a food manufacturing company compare the properties of substances for use in flavoring frozen yogurt. They prepare

this list of questions to test the substances. I. Which substances are solids at room temperature? II. Which substances have the most pleasing taste? III. Which substances most quickly dissolve in water? IV. Which substances would best flavor the frozen yogurt? Which of the following questions can be answered through science? (2 points) Questions II and III only Questions II and IV only Questions I and III only Questions I and II only
Chemistry
1 answer:
Ludmilka [50]3 years ago
7 0
I pick but I'm not sure about it though 1and3
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Give two reasons why a luminous flame is not used for heating purposes. (2mks) a​
Natali [406]

Answer:

The Two reasons are :-

1. Combustion efficiency

2. Standardization of test conditions as non-luminous flame.

Explanation:

A luminous flame isn't suitable for heating as it gives out soot (A black powdery or flaky substance consisting largely of amorphous carbon, produced by the incomplete burning of organic matter)

8 0
3 years ago
The reaction of 2-chloropropane with sodium hydroxide can occur via both SN1 and SN2 mechanisms.
strojnjashka [21]

Answer:

Explanation:

(a) Part 1: S_N1 reaction. This is a nucleophilic substitution reaction in which we have two steps. Firstly, chlorine, a good leaving group, leaves the carbon skeleton to form a relatively stable secondary carbocation. This carbocation is then attacked by the hydroxide anion, our nucleophile, to form the final product.

To summarize, this mechanism takes places in two separate steps. The mechanism is attached below.

Part 2: S_N2 reaction. This is a nucleophilic substitution reaction in which we have one step. Our nucleophile, hydroxide, attacks the carbon and then chlorine leaves simultaneously without an intermediate carbocation being formed.

The mechanism is attached as well.

(b) The rate determining step is the slow step. Formation of the carbocation has the greatest activation energy, so this is our rate determining step for S_N1. For S_N2, we only have one step, so the rate determining step is the attack of the nucleophile and the loss of the leaving group.

3 0
3 years ago
Chem homework, help?
IrinaVladis [17]
I'm not writing random things to reach the 20 character requirement so I can tell you that Magnesium has the least amount of atoms.
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2.What are variables used to describe weather?
Studentka2010 [4]
The answer is, All of the above
4 0
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Determine if the equation is endothermic or exothermic examples
Fittoniya [83]
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In endothermic reactions you can find a triangle above the arrow.
6 0
3 years ago
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