Answer: 31! hope this helps!
Explanation:
How many grams of oxygen are in 4.50x10^25 formula units of potassium sulfate?
Potassium Sulfate = K2SO4 = 174.252 g/mol
K2 = 78.196 g/mol
S = 32.06 g/mol
O4 = 63.996 g/mol
Answer:
4777.09grams
Explanation:
To find the mass of oxygen, we first need to find the mass of potassium sulfate (K2SO4).
Since there are 4.50 x 10^25 formula units of potassium sulfate, we can find the number of moles in K2SO4 by dividing by Avagadros number (6.02 × 10^23 units). That is;
number of moles of K2SO4 (n) = 4.50 x 10^25 ÷ 6.02 × 10^23
= 0.747 × 10^ (25-23)
= 0.747 × 10^2
= 7.47 × 10^1 moles
Mass in grams of K2SO4 can be calculated thus: molar mass of K2SO4 × moles
= 174.252 g/mol × 7.47 × 10^1 moles
= 13016.62grams.
Since mass of oxygen in 1 mol of K2SO4 = O4 = 63.996 g/mol
We find the percentage by mass of oxygen in K2SO4 as follows:
= 63.996/174.252 × 100
= 0.367 × 100
= 36.7% by mass of oxygen.
This means that in 1gram of K2SO4, there are 0.367gram of Oxygen. Hence, in 13016.62grams (4.50 x 10^25 units) of K2SO4, there will be;
0.367 × 13016.62
= 4777.09grams of oxygen.
Balance the following chemical equation:
i need F
Answer:
L2 add a for NAL add a 2 then for the first NA2 put a 4 and then the second NA2 put a 2 and it should be good
Explanation:
Substances that are good conductors of heat and electricity at room temperature usually
have delocalized electrons moving freely from atom to atom. Which type of bonding
occurs in these substances?
O covalent
electric
ionic
metallic
ASAP PLEASEE
Answer:
the answer is electric
Explanation:
i think so
A property is a characteristic that can be used to identify a substance. Properties can be ______ or _______.
Answer:
a list of characteristics that can be used to identify a substance include color, odor, taste, density, melting point, boiling point, conductivity, and hardness.
Answer:
physical or chemical
Explanation:
A physical property is a characteristic of a substance that can be observed or measured without changing the identity of the substance while a chemical property describes the ability of a substance to undergo a specific chemical change.
how do I balance these
Explain how Newton's idea about inertia has helped in astronomy?
o We can learn that objects in space like asteroid will keep its path unless a different force is applied to it
The Law of Inertia will help us discover distant galaxies
Inertia is used to help identify distance planets.
o We can figure out the size of far away planet through the Law of Inertia.
NEXT QUESTION
ASK FOR HELP
Answer:
the answer is A because when something is going straight it wont change unless its acted upon by a force
Explanation:
Electrons, protons and which other sub-atomic particle were discovered in the 19th and early 20th century?
Answer: The electron, discovered in 1897 by J. J. Thomson, was the first subatomic particle to be observed. The nucleus of ordinary hydrogen was understood to be a single proton after the nucleus of the atom was discovered in 1911 by Ernest Rutherford. In 1932, a neutron was detected.
How
many moles of hydrogen gas will form if 0.35 moles of Na reacts with an
excess of water?
Answer:
0.8 moles
Explanation:
2H2+O2 —›2H2O
Since , from given balanced chemical Equation.
2moles of H2 produce 2 moles of Water
So,
2moles H2= 2moles H2O
1moles H2= 1 mole of H2O
For 0.8 mole of H2O, multiply both sides by 0.8
0.8 H2=0.8 H2O
0.8 mole of H2= 0.8 mole H2O
So answer is 0.8 moles
In what situation does water undergo a physical change?
Answer:
There are actually two.
Explanation:
When water freezes it turns to ice however it still has the molecular properties of water. Same thing when it evaporates.
A small amount of liquid bromine is added to a container which is then sealed.
Br2 (l) " Br2 (g)
What two ways you can increase the frictional force between two objects?
( 8th grade )
Frictional force between two objects can be increased by:
i) making the surfaces rough
ii) increasing the mass of the object that ks moving.
Hope it helps you.
35. 124.31 g of silver nitrate reacts with 52.89 g of sodium chloride.
g
a. What is the mass of the products?
Answer: Thus mass of products is 177.2 g
Explanation:
According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side. Thus chemical equations are balanced.
The balanced chemical reaction is:
[tex]AgNO_3+NaCl\rightarrow NaNO_3+AgCl[/tex]
mass of silver nitrate [tex](AgNO_3)[/tex] = 124.31 g
mass of sodium chloride [tex](NaCl)[/tex] = 52.89 g
mass of reactants = mass of silver nitrate [tex](AgNO_3)[/tex] +
mass of sodium chloride [tex](NaCl)[/tex] = 124.31 g + 52.89 g = 177.2 g
Thus mass of products = mass of reactants = 177.2 g
What is the rate of acceleration caused by gravity?
Answer:
The numerical value for the acceleration of gravity is most accurately known as 9.8 m/s/s.
A flat plain of cooled lava is created by
What is the slope of the line?
Describe how the calcium atom and the oxygen atop form calcium oxide
Explanation: Formula and structure: Calcium oxide chemical formula is CaO and its molar mass in 56.0774 g mol-1. The molecule is formed by the calcium cation Ca+2 and the oxygen anion O-2, which form a ionic bond. The calcium oxide ionic lattice is cubic and similar to NaCl lattice, with an ion surrounded by 6 opposite charge-ion.
I'm having trouble balancing these. Can you help me
Answer:
Oh Okay
I hope u have a better rest of ur day
Please help me with this
10. Which is true of unicellular organisms?
A. They lack cells.
B. They all are eukaryotes.
C. They lack cell differentiation.
Answer:
a
Explanation:
Answer:
The answer is
B. They all are eukaryotes.
Hope it will help :)
Which gas is given out during burning process
Answer:
Carbon dioxide
I hope it helps
#captainpower
pls make me brainliest
22. A student carefully measures a certain quantity of four different substances
into trays that will be used in a laboratory exercise. Which of these trays would
contain the largest number of atoms?
Sample
Mass of tray
with sample
Water
Mass of
empty tray
37.86g
36.59g
37.418
55.88g
Table Salt (NaCl)
Copper Wire
95.03g
100.96g
245.20g
Lead Shot
38.08g
Answer:
Water
Explanation:
The substance that has the highest number of moles also has the highest number of atoms.
The number of atoms of a substance can be calculated using the Avogadro's number. This number gives the number of elementary entities such as atoms, molecules and ions in one mole of a substance.
All you need to do is to find out which substance has the highest number of moles. This substance will also have the highest number of atoms present.
Learn more about Avogadro's number: https://brainly.com/question/1445383
What is the empirical formula of a compound that contains 28% iron, 24% sulfur, and 48% oxygen by mass?
Answer:
Fe2S3O12 would be the closest Answer
Explanation:
How many grams of nitric acid, HNO3, are required to neutralize (completely react with) 4.30 g of Ca(OH)2?
Answer:
8.25 g HNO3 (please correct me if I'm wrong!)
The correct answer is 7.31 g HNO₃.
What is nitric acid used for?Nitric acid is used for the production of ammonium nitrate, a major component of fertilizers. It is also used for producing explosives like nitroglycerin and trinitrotoluene (TNT) and for oxidizing metals.
Please check the attached file for an explanation.
Learn more about nitric acid at
https://brainly.com/question/10082840
#SPJ2
Initially, the chalk had a mass of 323.5 grams but upon completion, its mass had dropped to 301.2 grams. What is the change in mass?
explain why it is more difficult to produce drinking water from waste water than from water in lakes
Answer:
Drinking water can be produced from waste water and from lakes but the difference is in the difficulty of producing water which we can consume.
Drinking water should be clean and toxic free so that if does not affect the human body. Waste water carry more toxic matter in comparison to lake water that's why, producing drinking water from waste water takes more time, expensive and difficult.
So, producing drinking water from waste water is more difficult as it require the removal of more toxic matter than water in lakes.
Mass of the Graduated Cylinder
(only air)(g) Mass of the Graduated Cylinder with
Water (g) Calculated Mass of Water (g)
73.7 73.7 0.0
A student collected the above data for this experiment. What error did he make? Explain.
Answer:
If there is water in the graduated cylinder and what is required is the exact amount of water, then the instrument used to measure the mass is not that accurate. Having only one decimal place is not enough to detect the mass of water in the cylinder.
Explanation:
Write a net ionic equation for the neutralization reaction of acid with a hydroxide base. (Include phase symbols)
Answer:
salt + water. It is called the ionic equation for neutralisation. the acid to form a salt solution.
Explanation:
So what you end up with is you always end up H+ plus OH- yields H2O, because HCl, and NaOH, since they're strong, they fully dissociate. So the Na+, and the Cl - are spectator ions. So with a strong acid and strong base, the net ion equation is always H+ plus OH- yields H2O.
Ahh, help me I don’t know what to pick
Answer:
for what? is there supposed to be a picture?
Explanation:
??
Which of these factors is involved in earthquake formation?
A. plates getting larger
B. rocks breaking
C. stress that decreases
D. faults that remain stationary
Answer:
B
Explanation:
Edge 2023
two difference between simple cell and dry cell
Explanation:
Simple cell has liquid chemicals and it is difficult to carry from one place to another. Dry cell has no solution. So, it is easier to carry it from one place to another and there is no risk of spilling acid from the dry cell.