Extracting Surface Minerals. Surface mining is just what it sounds like - removing minerals that are near the earth's surface because this is where the ore deposits are located. ... When the ore is found in a wide area but it's not very deep in the ground, strip mining is used.
Answer:
i think its C: surface mining
Explanation:
Surface mining, including strip mining, open-pit mining and mountaintop removal mining, is a broad category of mining in which soil and rock overlying the mineral deposit are removed, in contrast to underground mining, in which the overlying rock is left in place, and the mineral is removed through shafts or tunnels.
Salt is a compound made from sodium (Na) and chlorine (Cl). Salt _____.
A. has properties very similar to sodium
B.has properties very similar to chlorine
C.has very different properties from sodium and chlorine
Answer:
The correct answer option is C. has very different properties from sodium and chlorine.
Explanation:
We know that salt (chemical name: Sodium Chloride) is made from two elements, Sodium (Na) and Chlorine (Cl). But the properties of the compound of sodium and chlorine has completely different properties than those of its elements: Sodium and Chlorine.
Sodium is quite a low density but highly reactive silvery white metal and Chlorine is a highly reactive greenish yellow gas. While salt (NaCl) is a crystalline material, white in color, which readily dissolves in water and is used as a condiment to add flavor to food.
Answer:
Im am about 85 % sure the anser is c.
tell me if im correct or not plz
good luck.
Explanation:
PLEASE HELP ME URGENTLY!
i believe it its the 2nd one
Im not 100% sure but I think it B also.
Hope this help ^_^
Maria is late for school sometimes because she is not a morning person. If Maria is at school from 8:00 a.m. to 3:00 p.m. every day and volunteers at an animal shelter on the weekends, when would be the best time for her to study?
A.
before school
B.
right after school
C.
during the weekend
D.
before she goes to bed
I think the answer would be after school
What is accrued interest ?
accrued interest is the interest on a bond or loan that has accumulated since the principal investment, or since the previous coupon payment if there has been one already.
How does a teaching certificate affect one's prospects for acquiring a job in the education field?
A. Teaching certificates are required in very few U.S. states, so acquiring one is generally not beneficial.
B. Most public and private schools require teaching certificates, so acquiring one is crucial in obtaining a teaching job.
C. The acquisition of a teaching certificate generally does not affect one's job prospects as they are not usually required by schools.
D. Since teaching certificates are only required to teach Early Childhood Development classes, one would have more options and be able to teach younger students.
The best option to answer the given question is (B) Most public and private schools require teaching certificates, so acquiring one is crucial in obtaining a teaching job.
Regardless of country, if you would like to teach in a formal education setting, you must have a teaching certification that is considered valid in said country. This, of course, includes the United States.
A stitch in time saves nine. A penny saved is a penny earned. These sentences are... similar in meaning opposite in meaning neither the same nor the opposite
Answer:
Neither the same nor the opposite
Explanation:
A stitch in time saves nine is an idiom meaning that it's better to deal with problems right away and spend less time doing that than later when more time is going to be needed.
A penny saved is a penny earned is an idiom meanings that saving money, even little by little, is as useful as earning more.
When we compare these two idioms, we can see that their meanings are neither the same nor the opposite.
Answer:
ave you ever heard one of your grandparents say, “A stitch in time saves nine"? They may have uttered this phrase with a wise nod of the head after a subtle recommendation to do something now, rather than waiting until later. You may have thought, “Saves nine what?" If so, read on…
“A stitch in time saves nine" is an idiom, which is a phrase whose symbolic or intended meaning is different from the literal meaning of the words themselves.
Iron pyrite (FeS2) is the form in which much of the sulfur exists in coal. In the combustion of coal, oxygen reacts with iron pyrite to produce iron(III) oxide and sulfur dioxide, which is a major source of air pollution and a substantial contributor to acid rain. What mass of Fe2O3 is produced from 84 L of oxygen at 3.41 atm and 148◦C with an excess of iron pyrite? Answer in units of g.
4FeS₂ + 11O₂ = 2Fe₂O₃ + 8SO₂↑
n(FeS₂) = m(FeS₂)/M(FeS₂) = 6000/120 = 50 моль
по уравнению реакции - n(O₂) = (11*n(FeS₂))/4 = (11*50)/4 = 137,5 моль
V(O₂) = n(O₂)*Vm = 137,5*22,4 = 3080 л
ответ: V(O₂) = 3080 л
Подробнее - на Znanija.com - https://znanija.com/task/19124279#readmore
Answer:
[tex] 8.297 mol O_2 *\frac{2 mol Fe_2 O_3}{11 mol O_2} *\frac{159.69 gr Fe_2 O_2}{ 1mol Fe_2 O_3}= 240.90 gr Fe_2 O_3[/tex]
Explanation:
For this case we have the following equation:
[tex] 4FeS_2 +11 O_2 \rightarrow 2Fe_2 O_3 +8SO_2[/tex]
After balance the equation.
For this case we can use the following expression for an ideal gas:
[tex] PV = nRT [/tex]
And if we solve for [tex]n_{O_2}[/tex] we got:
[tex]n_{O_2} = \frac{PV}{RT} =\frac{3.41 atm *84L}{ 0.082 \frac{atm L}{mol K} (148+273)K} =8.297 mol O_2[/tex]
The mass for the [tex] Fe_2 O_3[/tex] is given by: [tex] 55.845gr*2 +16gr*3=159.69 gr[/tex], since we have 2 molecules of iron and 3 from oxygen.
For this case since the pyrite is the excess reactive we can calculate the amount of [tex]Fe_2 O_3[/tex] with the oxygen and we can do this:
[tex] 8.297 mol O_2 *\frac{2 mol Fe_2 O_3}{11 mol O_2} *\frac{159.69 gr Fe_2 O_2}{ 1mol Fe_2 O_3}= 240.90 gr Fe_2 O_3[/tex]
RESULTS OF CONCEPT RATING FOR NEW WINE COOLER
Rating of the appeal of the phrase as it relates to the new wine cooler Total Sample Gender Age
Male Female 21 - 24 25 -34 35-49
Extremely appealing (5) 151 68 83 48 63 40
Somewhat appealing (4) 91 51 40 36 32 23
Neither appealing nor not appealing (3) 36 21 15 9 16 11
Somewhat unappealing (2) 13 7 6 4 6 3
Not at all appealing (1) 9 3 6 4 3 2
QUANTITY PURCHASED PER PERSON IN 4 WEEKS
# of 6-packs purchased x # people who purchased
0 7
1 6
2 6
3 13
4 14
5 12
6 10
7 5
8 5
9 5
10 2
DRINKING TEMPERATURE
Sample # Temperature
1 52
2 46
3 50
4 42
5 52
6 50
7 39
8 44
9 49
10 39
11 47
12 46
13 43
14 52
15 49
16 47
17 49
18 52
19 50
20 47
21 49
22 38
23 57
24 49
25 49
26 57
27 45
28 58
29 54
30 44
What is the probability that a randomly selected 21 to 49 year old consumer is a males who gives the phrase a rating of 4?
1 2 3 4 5 6 7 8 9 10
TIME REMAINING
29:51
Shondra is thinking of making payments for her laptop by setting up automatic withdrawals with the store. What must Shondra consider before she decides to pay with automatic withdrawals?
Shondra should be sure she will remember to call the store each month to make the payment.
Shondra should check her credit history to be sure she has a good credit score.
Shondra should be sure she will have enough in her account to be able to make the monthly payments.
Shondra should consult with a credit counseling service.
Mark this and return
Shondra should be sure she will have enough in her account to be able to make the monthly payments.
Hope that helps and feel free to ask me more questions :)Brainliest??
Answer:
C) Shondra should be sure she will have enough in her account to be able to make the monthly payments.
Explanation: