A hydrocarbon is said to be saturated if: A)           one end of the molecule is hydrophilic while the other end is hydrophobic.
                B)            it has one or more double bonds between carbon atoms.
                C)            it contains more than one functional group.
                D)           each internal carbon atom is covalently bonded to two hydrogen atoms.
                E)            its functional groups include at least one aromatic ring.

Answers

Answer 1

Answer: D. If each eternal carbon is bonded to 2 hydrogen atoms, the hydrogen carbon is saturated. An easier way to remember if a hydrocarbon is saturated or not is to look for a double bond between 2 carbons in the chain, if this if present the hydrocarbon is UNsaturated, if this is not present the hydrocarbon is saturated.

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Which lists the elements in order from least conductive to most conductive?A. nitrogen (N), antimony (Sb), bismuth (Bi)B. nitrogen (N), bismuth (Bi), antimony (Sb)C. antimony (Sb), nitrogen (N), bismuth (Bi)D. bismuth (Bi), antimony (Sb), nitrogen (N)

Is rubber band stretching physical or chemical

Answers

Answer:

$\boxed {\boxed {\sf Physical \ change}}$

Explanation:

A chemical change, as the name suggests, must result from a change in the chemical makeup and new substances are produced. A very common example is metal rusting.

A physical change can be observed without a change in chemical composition. No new substances are produces. Ripping paper and an ice cube melting are physical changes.

A rubber band stretching is a physical change. No new substances are made and the chemical makeup remains the same.

Answer:

physical

Explanation:

this is a physical action to create a change. does not involve chemicals or elements

Which is classified as a renewable resource? A. coal B. wind C. oil D. uranium

Answers

The answer is B) Wind because wind will always be available, while coal, oil and uranium are objects we are digging up. This makes wind a renewable resource, therefore it is better for the environment because we can theoretically never run out of it. This is the reason we are starting to use wind to create energy; we can use it again.

The answer is obviously B. It is the only one that can continually be renewed without fail.

What is the valency & molecular formula of sulphate?

Answers

Explanation:

Let's consider sulphate radical, the chemical formula is given by SO42−. Here we can see there is a -2 charge on SO4, which means it has -2 valency. Now look at the option (a), phosphate can be written as PO43−. There is -3 charge on PO4, that means it has -3 valency.

Explanation:

molecular formula of sulphate ion is SO₄²⁻

and

the valency of sulphate ion is 2.

Help please! How many significant figures are in the measurement 0.00440 grams?

6
5
3
2

Answers

3 significant figures.

What term best describes the rate of radioactive decay for a particular radioactive element?A. fast
B. slow
C. variable
D. constant

Answers

Answer:

correct answer is option C (constant)

Explanation:

Radioactive decay of radioactive element occur at known rates, the unit of radioactive decay is called half-life. The amount of time a radioactive element takes for half of the parent atoms to decay is known as half-life of a radioactive element

During Radioactive decay radioactive elements emits a particle. It's impossible to predict exactly when a given atom of a substance will emit a particular particle, but the decay rate of a radioactive element over a long period of time is constant.

By radioactive decay scientist can determine the age of that particular element. If radioactive decay will vary than age cannot be determined from radioactive decay.

The rate of radioactive decay for a particle radioactive element is constant.

Make the following conversion.

60.2 mg = _____ g