Methods Of Separating Mixtures
Handpicking.
Threshing.
Winnowing.
Sieving.
Evaporation.
Distillation.
Filtration or Sedimentation.
Separating Funnel.
Answer:
wanna friend
Explanation:
pls
Which statement about the surface of the moon is true?
o There is water and air, but no life on the moon's surface.
O There is no air, wind, liquid water or life on the moon's surface.
There are liquid seas on the moon's surface.
It is very windy on the moon's surface.
Answer:
There is no air, wind, liquid water or life on the moons surface.
Explanation:
Answer:
ok i know it wont help now bc this was in 2020 but i did this on my lessons and its: There is no air, wind, liquid water, or life on the moon's surface.
Explanation:
i got all the right except the last one
How many moles are in a sample of 4.57 x 1024 atoms of neon (Ne)?
a.7.59 mol Ne
b.27.5 mol Ne
c.91.4 mol Ne
d.151 mol Ne
Answer:
A 7.59 mol Ne
Explanation:
The number of moles of Ne in a sample of 4.57 x 10²⁴ atoms of neon (Ne) are 7.59 mol of Ne. Hence Option (A) is the correct option. It can be solved with the help of Mole concept.
What is Mole concept ?The mole, symbol mol, is the SI base unit of amount of substance.
The quantity amount of substance is a measure of how many elementary entities of a given substance are in an object or sample.
n = given number / Avogadro's number
= 4.57 x 10²⁴ / 6.022 x 10²³
= 7.59 mol of Ne
Therefore, The number of moles of Ne in a sample of 4.57 x 10²⁴ atoms of neon (Ne) are 7.59 mol of Ne. Hence Option (A) is the correct option. It can be solved with the help of Mole concept.
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After food is consumed, chemical nutrients are absorbed into the blood. The blood then carries these nutrients to the body's cells where the nutrients enter mitochondria. Which reaction must occur next for the cell to carry on other activities?\
Answer:c. oxygen,light,and glucose combine to produce high energy molecules
Explanation:
Reacting 10.0 mL of H2(g) with 10.0 mL of C2H4(g) produces 10.0 mL of C2H6 at 1.5 atm. If the reaction produces 3.1 kJ of heat and the decrease in volume requires the heat surroundings do 7.6 J of work on the gases, what is the change in internal energy of the gases?
Answer:
the change in internal energy of the gases is -3.0924 KJ
Explanation:
The computation of the change in internal energy of the gases is as follows;
Given that
Q = -3.1 KJ
= -3100 J
It is negative as the heat is lost from the mixture
And,
W = + 7.6 J
It is positive as the work is done in the mixture
Now we use the following equation
Delat E = Q + W
= -3100 J + 7.6 J
= -3092.4 J
= -3.0924 KJ
Hence, the change in internal energy of the gases is -3.0924 KJ
i need the answer for this
Answer:
need points
Explanation:
How many significant figures
are in this number?
21.00
Answer:
4
Explanation:
the significant figures are 2 1 0 0
How many atoms are in 8.2 moles of magnesium
Answer:
4.93804*10^24 atoms
Explanation:
Hope this helped!
Can anyone solve the little chart at the bottom?
The formula for calculating power is work divided by time (power = work + time). What are two ways of stating the same relationship?
work = power + time
nwork s power x time
power
time = work x power
Opower workx time
time
Work
Answer:
See the answer below
Explanation:
The formula for calculating power is such that;
power = work/time
Two ways to restate the relationship between the 3 variables would be to make time and work the subject of the formula respectively.
1. When time if made the subject of the formula;
time = work/time
2. When work is made the subject of the formula;
work = power x time
Which energy source releases the most carbon dioxide?
O solar
O wind
O nuclear
O coal
Answer:
Coal
Explanation:
Coal is by far the worst emitter, followed by natural gas, with solar, wind and nuclear all low-carbon.
Coal, a non-renewable energy source releases the most carbon dioxide into the atmosphere.
What are energy sources?Energy sources refers to the various sources in which energy for man's needs are obtained.
There are two types of energy sources:
Renewable energy sourcesNon-renewable energy sourcesThe non-renewable energy sources such as coal release large amounts of carbon dioxide until The atmosphere.
Therefore, Coal, a non-renewable energy source releases the most carbon dioxide into the atmosphere.
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Most of the elements in the periodic table can be described as:
A. metalloids
B. halogens
c. non-metals
D. metals
The answer would be metals :)
HELPPPPPPPPP 35 POINTSSSSSS!!!!!FILL IN THE BLANKS with either "reduce" or "oxidize"
Magnesium is able to ——copper, and copper is able to —— magnesium.
Zinc is able to—— magnesium, and magnesium is able to—— zinc.
Copper is able to—— zinc, and zinc is able to—— copper.
Look at my screenshot:
Which of the following best describes foliated metamorphic rocks?
A
There are easily recognizable fossils.
B
The rock has ribbon-like layers of bands.
C
They have crystals like igneous rocks.
D
Different sized sediments can be seen.
Answer:
It's C because Metamorphic rocks were once igneous rocks. And, because Gneiss which is a Metamorphic rock has crystals inside of it.
Different rock types appear during rock formation. The best description of foliated metamorphic rocks is that;
B . The rock has ribbon-like layers of bands.Due to the pressure and heat that is exerted on some rock types, there is an alignment or foliation of rocks. The appearance can be described as ribbon-like.
The examples of rocks that fall under this classification are slate, phyllite, gneiss, and schist.
The non-foliated rocks do not show any alignment in their minerals. Examples are; quartzite, marble, and novaculite.
Summarily, option B best describes a foliated metamorphic rock.
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how many elements are found in the third period. A.2 B.18 C.8 D.32
Answer:
8
Explanation:
u can find it on ur chemistry book
Answer:
C. 8
Explanation:
Check chemistry textbook
What else is produced when sodium carbonate decomposes?
Na2CO3 → Na2O + _________
Answer:
CO2
Explanation:
why is more dew formed on a grass and not on polished metal surface
Answer
Incidentally, they all form dew but because grass is closer to the soil, which maintains heat longer than the air where tree leaves are found, you will find more condensation in that region. Also, higher up the wind and sun will allow faster evaporation which makes the dew less noticable on tree leaves.
Explanation:
Preferred objects of dew formation are thus poor conducting or well isolated from the ground, and non-metallic, while shiny metal coated surfaces are poor infrared radiators. ... If the wet soil beneath is the major source of vapor, however (this type of dew formation is called distillation), wind always seems adverse.
Jada Peterson
Wanda often looks through her telescope at the details of different bodies in our solar system. What skill is Wanda using?
A:observing
O concluding
O experimenting
hypothesizing
Save and exit
1
Answer: A
Explanation:
The volume of a gas with an initial pressure of 380 mmHg atm increases from 5.0 L to 8.0 L. What is the final pressure of the gas, in atm, assuming no change in moles or temperature?
A) 238 atm
B) 2.4 atm
C) 0.31 atm
D) 0.80 atm
E) 8.0 atm
Answer:
0.31 atmExplanation:
The new pressure can be found by using the formula for Boyle's law which is
[tex]P_1V_1 = P_2V_2[/tex]
Since we are finding the new pressure
[tex]P_2 = \frac{P_1V_1}{V_2} \\[/tex]
From the question
760 mmHg = 1 atm
380 mmHg = 0.5 atm
We have
[tex]P_2 = \frac{0.5 \times 5}{8} \\ = 0.3125[/tex]
We have the final answer as
0.31 atmHope this helps you
In your opinion, would there be a difference in your wieght in Baguio and in Manila ?
Why or Why not
Answer:
My wife and I just visited the City of Baguio for a week. We stayed at the Hotel Supreme Convention, which was very nice. We ate dinner at some really nice places: Mario's (expensive), Don Henrico's (mid), and Good Taste (cheap). We found a nice bar called the Old Bohemian for good live music. We ventured out toward Camp John Hay a couple of times for shopping(the commissary is a tourist trap with retail prices). We also did some street shopping.
Explanation:
My wife and I just visited the City of Baguio for a week. We stayed at the Hotel Supreme Convention, which was very nice. We ate dinner at some really nice places: Mario's (expensive), Don Henrico's (mid), and Good Taste (cheap). We found a nice bar called the Old Bohemian for good live music. We ventured out toward Camp John Hay a couple of times for shopping(the commissary is a tourist trap with retail prices). We also did some street shopping.
Answer:
Why would there be a difference in weight if you live in a different place?Explanation:
[tex]--------------------------------------------[/tex]
If you lived in Manila or Baguio, how would your weight change? It would probably depend on what they are eating, how long they exercise, but not living in a different place, right? This is mind - boggling and i don't know what you mean or if you're asking a different question.
[tex]--------------------------------------------[/tex]
Hope this helps! <3
[tex]--------------------------------------------[/tex]
help me pleaseeeeee
Answer:
Arthropod (3)
Annelids (2)
Cnidarians (1)
Echinoderms (4)
Explanations:
I hope all this helps if u don't understand it let me know.
In which unit is the wavelength of an electromagnetic wave commonly measured?
A. J
B. nm
C. s-1
D. kg
Answer:
nm
Explanation:
trust me:)
4. How many moles of water are produced when 3.25 moles of CO2 are formed?
Answer:
6.50 mol
Explanation:
The question is incomplete but I looked it up on the web.
How many moles of water are produced when 3.25 moles of CO₂ are formed during the combustion of methyl alcohol (CH₃OH)?
Step 1: Write the balanced equation
2 CH₃OH + 3 O₂ → 2 CO₂ + 4 H₂O
Step 2: Establish the appropriate molar ratio
According to the balanced equation, the molar ratio of CO₂ to H₂O is 2:4.
Step 3: Calculate the moles of water formed with 3.25 moles of carbon dioxide
We will use the established molar ratio.
3.25 mol CO₂ × (4 mol H₂O/ 2 mol CO₂) = 6.50 mol H₂O
The average speed of an oxygen molecule is 6.14 x 104 cm/sec at a certain temperature. What is the average speed of a CO2 molecule at the same temperature? (molar mass O2 = 31.9988; CO2 = 44.0098)
Answer:
the average speed of [tex]V_{av} CO_2[/tex] is 5.24 × 104 cm/s
Explanation:
The computation of the average speed of a [tex]CO_2[/tex] is as follows:
[tex]\sqrt{average} = \sqrt{\frac{8 RT}{\pi M} }[/tex]
where,
M = Molar mass
[tex]V_{av} = \frac{\sqrt{1}}{M}[/tex]
Given that
[tex]V_{av} \ of\ oxygen= 6.14 \times 10^4 cm/s[/tex]
The molar mass of oxygen i.e. (MO_2) = 31.9988 g/mol
And, the molar mass of CO_2 is 44.0098 g/mol
Now
[tex]\frac{V_{av} CO_2}{V_{av} O_2} = \frac{\sqrt{M_{O2} }}{M_{CO2}}[/tex]
Now place these values to the above formula
[tex]\frac{V_{av}CO_2}{6.14\times 104 cm/s} = \frac{\sqrt{31.9988} }{44.0098}[/tex]
So,
V_av CO_2 is 5.24 × 104 cm/s
hence, the average speed of [tex]V_{av} CO_2[/tex] is 5.24 × 104 cm/s
What is the molecular structure of H2O?
Answer:
A water molecule consists of two hydrogen atoms and one oxygen atom. The three atoms make an angle; the H-O-H angle is approximately 104.5 degrees. The center of each hydrogen atom is approximately 0.0957 nm from the center of the oxygen atom.
Explanation:
What is the empirical formula for a compound that is comprised of 54.0% sodium, 8.50% boron, and 37.5% oxygen by mass?
A) Na2B2O3.
B) Na3BO3.
C) Na3B2O2.
D) Na4BO4.
Answer:
B) Na3BO3.
Explanation:
Hello!
In this case, since percent compositions are used to identify the empirical formula of an unknown compound, we can assume we have 54.0 g of sodium, 8.50 g of boron and 37.5 g of oxygen, and we compute the moles of each one:
[tex]n_{Na}=54.0g*\frac{1mol}{23g} =2.35mol\\\\n_B=8.50g*\frac{1mol}{11g}=0.773mol\\\\n_O=37.5g*\frac{1mol}{16g}=2.34mol[/tex]
Now, we divide by the moles of boron as those are the fewest:
[tex]Na:\frac{2.35}{0.773}=3\\\\B:\frac{0.773}{0.773}=1\\\\O=\frac{2.34}{0.773}=3[/tex]
Thus, the empirical formula is B) Na3BO3.
Best regards!
Can someone help with 1 2 3 please I give you brainlest
Answer:
1. Option C : oppositely charged
2. Option B : positively charged
3. Option D : negatively charged
What is the electron configuration of chlorine (CI)?
A. 1s22s22p63s23p3
B. 1s22s22p63s23p5
C. 1s22s22p63s24s23p3
D. 1s22s22p63s23p23d3
The correct answer is B on edg 2020
Answer: it is b
Explanation:
What is an nucleus ?
Nucleus is present at the centre of atom. It contains protons and neutrons. It is very small as compared to the atom.
Answer:
It is a part of a cell which controls all the activities in the cells and contains the genetic information of the cell that is to be passed down to the next cell when it reproduces.
Explanation:
It is a part of a cell which controls all the activities in the cells and contains the genetic information of the cell that is to be passed down to the next cell when it reproduces.
Answer the in under 30 minutes and I will give brainliest
After which event in Indonesia did one of the worst tsunamis form?
a hurricane
a volcanic eruption
a landslide
an earthquake
Answer: I believe the answer is an earthquake.
Explanation: Sorry If I am wrong!
Answer:
earthquake
Explanation:
I took the k12 test
Adaleigh is learning about renewable and non-renewable resources in her science class. She decides to take
a nature walk and makes notes of all the renewable resources that she sees. Which of the following is an
observation that Adaleigh could have made on her walk?
A. The seeds on the ground are going to grow into new trees.
B. The tallest trees had the most seeds around their bases.
C. When trees decay, they could eventually turn into coal.
D. Pine trees are older than oak trees.
Answer:
A. The seeds on the ground are going to grow into new trees.
Explanation:
Trees are renewable resources.