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Vanyuwa [196]
3 years ago
12

Which of the following consists of a single element or type of compound?

Mathematics
2 answers:
masya89 [10]3 years ago
7 0
D) Pure substance

An impure substance is a mixture with different elements, that means A, B, and C can't be the right answer. A pure substance, on the other hand, contains only one element or compound. 
Schach [20]3 years ago
4 0

Answer:

D

Step-by-step explanation:

Pure Substance because it bis a single element.

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1
velikii [3]
<h3>Answer: B) Experiment</h3>

Reason:

Whenever you have two groups like this, one labeled the treatment group and the other the control group, we have an experiment gong on.

The treatment group gets the actual medication that is being tested. The control group gets a fake medication, aka placebo. Usually a placebo is meant for humans because it's more of a psychological factor. With cats, it likely won't affect them. However, such practices of having two groups like this is standard no matter what group of subjects you're testing.

The idea is that if the treatment group has better results compared to the placebo group, then it's likely the medication works.

4 0
2 years ago
Multiply the expression (1/3 m-n)^2​
nataly862011 [7]

Answer:

{(

6 0
2 years ago
Read 2 more answers
They're usually 365 days in each year every 4th year is call a leap year and has one extra day in February how many days are the
Mariana [72]

Answer:

Total number of days in 8 years is 2,922 days.

Step-by-step explanation:

Number of days in a Normal year  = 365 days

Number of days in a  leap year  =  366 days

Also, Leap year comes exactly ONE TIME in every FOUR YEARS.

⇒ In every consecutive 4 years, 1 year is a leap year.

⇒ So, number of leap years in 8 years  =   2

Now, 8 Years  = 6 Normal years +  2 leap Years

<u>Number of days in 6 normal years</u>

= 6 x ( Number of days in a regular year)

= 6 x (365 days)  = 2,190 days

<u>Number of days in 2 leap years</u>

= 2 x ( Number of days in a leap year)

= 2 x (366 days)  = 732 days

So, Total number of days in 8 years

= Number of days in 6 regular years  + Number of days in 2 leap years

= 2,190 days  +  732 days

= 2,922 days

Hence, total number of days in 8 years is 2,922 days.

5 0
3 years ago
A toy shop purchases 125 identical stuffed animals for a total cost of $312.50 and sells them for $7 each. What is the percent m
Andrew [12]
23% is maybe the percentage but if not then it maybe a little higher or lower
5 0
3 years ago
Read 2 more answers
1) any letters can change into an a
Dimas [21]
CAC can be changed into CAAC. This is because the first rule says that any letter can change into an A so
 CAC=CAA
The last condition says that when you double , you have to double all letters,
Since A has been doubled,C needs to be doubled too.So:
CAA=CAAC

4 0
3 years ago
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