Answer:
Explanation:
mass of aluminum 2.8 kg = 2.8 x 1000 = 2800 g
ρ = density of aluminum given = 2.7 g / cm³
density = mass / volume
volume = mass / density
= 2800 / 2.7
= 1037 cm³
So volume of cube required = 1037 cm³.
C3H8 + 5O2 → 3CO2+ 4H2O, if 5.75L of oxygen are consumed in the above reaction, how many L of carbon dioxide are produced?
Answer: 3.45 L carbon dioxide are produced
Explanation:
According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number [tex]6.023\times 10^{23}[/tex] of particles.
To calculate the moles, we use the equation:
[tex]\text{Number of moles}=\frac{\text{Given volume}}{\text {Molar volume}}=\frac{5.75L}{22.4L}=0.257moles[/tex]
[tex]C_3H_8+5O_2(g)\rightarrow 3CO_2+4H_2O[/tex]
According to stoichiometry :
5 moles of [tex]O_2[/tex] produce = 3 moles of [tex]CO_2[/tex]
Thus 0.257 moles of [tex]O_2[/tex] will produce=[tex]\frac{3}{5}\times 0.257=0.154moles[/tex] of [tex]CO_2[/tex]
Volume of [tex]CO_2=moles\times {\text {Molar volume}}=0.154moles\times 22.4L/mol=3.45[/tex]
Thus 3.45 L carbon dioxide are produced
PLZ PLZ PLZ HELPP
1. If you have 4 dozen eggs, how many eggs do you have?
2. If you have 4 moles of gold atoms, how many atoms do you have?
Answer:
1. 48 2. uhhh molar mass of gold/avogadro's number = 4 moles so guess
Explanation:
Answer:
1. 48 2. uhhh molar mass of gold/avogadro's number = 4 moles so guess
Explanation:
HELP ASAP pls will give brainlist
Answer:
Fe ^2+ + MnO - 4 → Fe 3+ + Mn 2+
Explanation:
Explanation:
You follow a series of steps in order:
Identify the oxidation number of every atom.
Determine the change in oxidation number for each atom that changes.
Make the total increase in oxidation number equal to the total decrease in oxidation number.
Place these numbers as coefficients in front of the formulas containing those atoms.
Balance all remaining atoms other than
O
and
H
.
Balance
O
.
Balance
H
.
Check that atoms and charges balance.
Here's how it works. Your unbalanced equation is
Question 7 (5 points)
(05.01 LC)
One mole of zinc has a mass of 65.4 grams. Approximately how many atoms of zinc are present in one mole of zinc?
Answer:
6.02 x 10²³ atoms
Explanation:
The number of moles present in 1 mole of zinc will be 6.02 x 10²³ atoms. This is because a mole of any substance contains the Avogadro's number of particles which is 6.02 x 10²³ atoms.
A mole is simple a convenient way of estimating the number particles within a substance.
So every 1 mole of a substance contains the same number atom in there.
For the give zinc, since it is 1 mole, it will contain 6.02 x 10²³ atoms
they've changed the answer, but 6.02 x 1023 is still right. the new answer is just 6 x 1023.(6.02 rounded to the nearest integer)
A sample of gas at 2.00 atm has a temperature of 60. °C. What will its temperature be at 6.50 atm
Answer:
https://quizlet.com/259730102/chemistry-unit-10-flash-cards/
Explanation:
A missile is flying at a speed of 125 m/s. If the missile has a mass of 125 kg, what’s its kinetic energy?
976,563 is the answer I got to your question
Answer:
976 563
Explanation:
Hope you get it right thou
PLS HELP I WILL GIVE BRAINLIST.
Mercury has a density of 13.6 g/cm³. Which of these materials will float in mercury? Check all that apply.
iron, density: 7.8 g/cm³
aluminum, density: 2.7 g/cm³
silver, density: 10.5 g/cm³
gold, density: 19.3 g/cm³
uranium, density: 18.7 g/cm³
lead, density: 11.3 g/cm³
Answer:gold iron and uranium
Explanation:
Answer:
iron, density: 7.8 g/cm³
aluminum, density: 2.7 g/cm³
silver, density: 10.5 g/cm³
lead, density: 11.3 g/cm³
Explanation:
other ones wrong
Pls do it I don’t understand
How many atoms are in 70.00 grams of oxygen.
Question 2 options:
2.635 x 1024 molecules O
2.635 x 1024 atoms O
6.744 x 10 23 atoms O
6.744 x 1026 atoms O
Answer:
A. is the correct choice.
Explanation:
If there are 70.00 g of Oxygen then it would be molecules, in which there is only 1 option with molecules.
I am NOT professional. There is a chance I am wrong. Please reply to me if I made a mistake.
Answer:
Explanation:How many atoms are in 70.00 grams of oxygen.
Find the mass of 1.25 moles Ca(OH)2.
According to the mole concept, the mass of 1.25 moles Ca(OH)₂ is 92.61 grams.
What is a mole?Mole is defined as the unit of amount of substance . It is the quantity measure of amount of substance of how many elementary particles are present in a given substance.
It is defined as exactly 6.022×10²³ elementary entities. The elementary entity can be a molecule, atom ion depending on the type of substance. Amount of elementary entities in a mole is called as Avogadro's number.
It is widely used in chemistry as a suitable way for expressing amounts of reactants and products.For the practical purposes, mass of one mole of compound in grams is approximately equal to mass of one molecule of compound measured in Daltons. Molar mass has units of gram per mole . In case of molecules, where molar mass in grams present in one mole of atoms is its atomic mass.Mass=number of moles×molar mass=1.25×74.09=92.61 g.
Thus,the mass of 1.25 moles Ca(OH)₂ is 92.61 grams.
Learn more about moles,here:
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student A is pulling 57 newtons and student B is pushing at 96 newtons. What is the net force?
Answer:
153 N left
Hope this helps
Explanation:
_is a change in direction or speed
-velocity
-force
-deceleration
-mass
-acceleration
lil give brainly 20 points
Answer: i would say producer
Explanation:
Answer:
a
Explanation:
1. Draw what you think happened with the water molecules and the molecules in the food-coloring dyes during chromatography. 2. Include a key that will help another scientist understand your model. 3. Label the parts of your model. 4. Use arrows if needed.
PLEASE HELP ME WHOEVER HELPS ME WITH THIS I WILL MAKE BRAINLIEST I SWEAR I WILL. also i need help with the molecule part so please help me
Answer:
we cant draw on drainly and we cant upload a pic cause we cant share links on here
Explanation:
How many molecules are there in 0.655 moles of CH_2?
Answer:
Not sure about this one, sorry
Explanation:
If on December 1st there is a new moon, when will the next new moon be approximately?
December 14th
December 5th
January 5th
December 29th
What is the overall reaction equation
Answer:
If m or n is zero, the reaction is zero order in A or B, respectively, and the rate of the reaction is not affected by the concentration of that reactant. The overall reaction order is the sum of the orders with respect to each reactant. If m = 1 and n = 1, the overall order of the reaction is second order
(m + n = 1 + 1 = 2).
Explanation:
in multicellular organisms groups of cells that work together are called:______.
Answer:
In multicellular organisms groups of cells that work together are called tissues.
can you help me balance this
Balanced equation
Mg₃(PO₄)₂ + 2Al(NO₃)₃ → 3Mg(NO₃)₂ + 2AlPO₄
Further explanationGiven
Reaction
Mg3(PO4)2 + Al(NO3)3 → Mg(NO3)2 + AlPO4
Required
Balanced equation
Solution
Give a coefficient :
Mg₃(PO₄)₂ + aAl(NO₃)₃ → bMg(NO₃)₂ + cAlPO₄
Make an equation :
Mg, left = 3, right=b⇒b=3
P, left=2, right=c⇒c=2
Al, left=a, right=c⇒a=c⇒a=2
The reaction becomes :
Mg₃(PO₄)₂ + 2Al(NO₃)₃ → 3Mg(NO₃)₂ + 2AlPO₄
helppppppppppppppppppppp
Answer:
Formation of sedimentary rocks
Explanation:
I believe this is correct, May I get a brainliest???
Distance=100 meters
Time=33.2 seconds
Speed=
pls help
Answer:
3.01
Explanation:
Speed=distance/time
=100mtrs/33.2sec
=3.01m/s
Greenhouse gasses help Earth's energy budget stay balanced. They absorb radiation from the sun which traps heat close the surface. Without
greenhouse gasses our planet would be too cold. Too many green house gasses could cause our planet to heat up.
True or False
Answer:
true
Explanation:
because of gravity hahah
what does aqueous mean
of or containing water, typically as a solvent or medium.
"an aqueous solution of potassium permanganate"
like water; watery.
"a great hall of aqueous marble"
This is for my wonderful boy friend Putting my defenses up
'Cause I don't wanna fall in love
If I ever did that, I think I'd have a heart attack
Never put my love out on the line
Never said "Yes" to the right guy
Never had trouble getting what I want
But when it comes to you, I'm never good enough
When I don't care, I can play 'em like a Ken doll
Won't wash my hair, then make 'em bounce like a basketball
But you make me wanna act like a girl
Paint my nails and wear high heels, yes, you
Make me so nervous that I just can't hold your hand
You make me glow
But I cover up, won't let it show
So I'm putting my defenses up
'Cause I don't wanna fall in love
If I ever did that, I think I'd have a heart attack
I think I'd have a heart attack
I think I'd have a heart attack
Never break a sweat for the other guys
When you come around, I get paralyzed
And every time I try to be myself
It comes out wrong like a cry for help
It's just not fair; pain's more trouble than love is worth
I gasp for air; it feels so good, but you know it hurts
But you make me wanna act like a girl
Paint my nails and wear perfume for you
Make me so nervous that I just can't hold your hand
You make me glow
But I cover up, won't let it show
So I'm putting my defenses up
'Cause I don't wanna fall in love
If I ever did that, I think I'd have a heart attack
I think I'd have a heart attack
I think I'd have a heart attack
The feelings got lost in my lungs
They're burning I'd rather be numb
And there's no one else to blame
So scared I take off, and I run
I'm flying too close to the sun
And I burst into fla-fla-flames
You make me glow
But I cover up, won't let it show
So I'm putting my defenses up
'Cause I don't wanna fall in love
If I ever did that, I think I'd have a heart attack
I think I'd have a heart attack (Heart attack)
I think I'd have a heart attack
I think I'd have a heart attack
I think I'd have a heart attack
Answer:
oh thats a bomb song tho i love
Answer: Christina your killing me pls come back i screwed everything up with everyone pls
Explanation: pls
Convert 380 mmHg to atm.
Answer:
50662.5
Explanation:
How does salinity vary with freezing and melting?
Question 3 options:
Freezing increases salinity, while melting decreases salinity.
Both freezing and melting decrease salinity.
Freezing decreases salinity, while melting increases salinity.
Both freezing and melting increase salinity.
Answer:
For every 5 psu increase in salinity, the freezing point decreases by 0.28 degrees Celsius (0.5 degrees Fahrenheit); thus, in polar regions with an ocean salinity of about 32 psu, the water begins to freeze at -1.8 degrees Celsius (28.8 degrees Fahrenheit).
Explanation:
Freezing increases salinity, while melting decreases salinity.
took the test lol
write your idea on the saying."we are what we eat"
Explanation:
A way to maintain good health is from exercise, eating healthy foods, getting enough rest, keeping .The first mention of the phrase 'you are what you eat' came from the 1826 work Physiologie du Gout, ou Medetations de Gastronomie Transcendante, in which French author Anthelme Brillat-Savarin wrote: “Tell me what you eat and I will tell you what your are.”
PLZ ANSWER FAST LOL:If the magnets are aligned will the spacecraft and launcher repel, attract, or do both?
Answer:
Explanation:
The answer depends, if they are at opposite poles they will attract but if they are at the same pole they will repel
Which object has a tail when it passes near the Sun?
A. Comet
B. Meteor
C. Moon
D. Asteroid
Answer:
A. Comet
Explanation:
Comet is a object which has a tail when it passes near the Sun.
What is a comet?A comet is an icy, small Solar System body that warms and begins to release gases when passing close to the Sun, a process called outgassing. This produces an extended, gravitationally unbound atmosphere or coma surrounding the nucleus, and sometimes a tail of gas and dust gas blown out from the coma.
These phenomena are due to the effects of solar radiation and the outstreaming solar wind plasma acting upon the nucleus of the comet. Comet nuclei range from a few hundred meters to tens of kilometers across and are composed of loose collections of ice, dust, and small rocky particles. The coma may be up to 15 times Earth's diameter, while the tail may stretch beyond one astronomical unit.
Learn more about comet,here:
https://brainly.com/question/12443607
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which statement describes the movement of carbon dioxide in the carbon cycle?