Answer:
0.2 x 10^19
Explanation:
Each element can be indentified by the number of _______ found in its nucleus, which also equals the elements _______ _______.
Answer:
Protons, Atomic number
How many particles are in 3.5 g of P
Explanation:
Hence an atom is made up of three particles called electrons, protons and neutrons and 1 mol exactly contains 6.02214076×1023 atoms or particles. Thus 2.11×1024 atoms are present in 3.5 mol of arsenic.
What is the concentration of H+ in a 2.5 M HCl solution?
Answer:
The concentration of H⁺ in a 2.5 M HCl solution is 2.5 M
Explanation:
As HCl is a strong acid and hence a strong electrolyte, it will dissociate as
HCl ⟶ H⁺ + Cl⁻
So, The concentration of H⁺ will be 2.5 M (same as HCl)
Thus, The concentration of H⁺ in a 2.5 M HCl solution is 2.5 M
-TheUnknownScientist 72
A solution of HF is titraited with a 0.150M NaOH solution. The pH at the half equivalence point is ? The Ka of HF I 0.00068.
Answer:
don't know00000⁰0000000
A student rides a bicycle 100 meters in 25 seconds. What is the students speed?
Answer:
The student's speed is 4 m/s.
Explanation:
Speed = Distance/Time
Speed = 100m/25s
Speed = 4 m/s
In which substance are the electrostatic forces between molecules the strongest?
(1 point)
O acetone
O propane
turpentine
glycerin
The Whole Electrical Bonding Investigation Plan Quick check
1) B. boiling point, surface tension, vapor pressure
2) A. glycerin
3) C. the temperature at which additional heat energy causes the substance to change from a liquid to a gas
4) D. Heat each substance in liquid form to its boiling point. Measure the temperature of each substance
5) A. A liquid boils when the vapor pressure equals the atmospheric pressure.
The substance with the strongest electrostatic force has been Glycerin.
The boiling point has been the temperature required for the conversion of the liquid phase to the gaseous phase. The boiling point has been dependent on the intermolecular forces between the molecule.
The molecule with the higher interactions have a higher boiling point, and the molecules with the weaker interaction forces have a lower boiling point.
Among the given compounds, Glycerin has been the compound with the highest boiling point, thus the interactions within the glycerin molecules have been the greatest.
For more information about electrostatic interaction, refer to the link:
https://brainly.com/question/13555353
if n=3, what are the quantam numbers l and m
Answer:
1=n yan ang alam heheheheh sorry kong mali
How much do 3.01 x 1023 atoms of Helium weigh?
Answer:
4.0 grams
Explanation:
I hope that helped!!
0.500 mol aluminium hydroxide, Al(OH)3 reacts with 0.500 mol sulphuric acid, H2SO4 to produce aluminium sulphate and water.
a) Write the balanced equation for the reaction.
b) Which reactant is limiting reactant?
c) How many moles of excess reactant is used in the experiment?
d)Determine how many moles of aluminium sulphates was obtained if the percentage yield of aluminium sulphate during the experiment is 77%.
[9 marks]
a) The balanced equation for the reaction would be as follows:
[tex]2 Al(OH)_3 + 3 H_2SO_4 ---> Al_2(SO_4)_3 + 6 H_2O[/tex]
b) The mole ratio of aluminum hydroxide to sulfuric acid is 2:3. This means that every 1 mole of the aluminum hydroxide would require 1.5 moles of sulfuric acid.
0.5 mole aluminum hydroxide would require:
0.5 x 3/2 = 0.75 moles of sulfuric acid.
But only 0.500 moles of sulfuric acid is present. Thus, the limiting reagent is sulfuric acid.
c) With 0.5 moles sulfuric acid, the mole of aluminum hydroxide required would be:
0.5 x 2/3 = 0.33
Excess moles of aluminum hydroxide = 0.5 - 0.33
= 0.17 moles
d) The mole ratio of sulfuric acid to aluminum sulfate produced is 3:1. With 0.5 moles sulfuric acid, the mole of aluminum sulfate produced would be:
0.5 x 1/3 = 0.17 moles
But the percentage yield is 77%
77/100 x 0.17 = 0.13 moles
Thus, the moles of aluminum sulfate that would be obtained with a percentage yield of 77% would be 0.13 moles.
More on stoichiometric calculations can be found here: https://brainly.com/question/8062886
A cars is moving at 12 m/s and has a mass of 600 kg. What is the kinetic energy for the car? (Formula:KE= 1/2 MV2) 36,300J 43,200J 72,600J 86,400J
Explanation:
ano po topic nyo para maayos sagut
Genes that confer resistance to antibiotics provide a selective advantage to organisms that are exposed to antibiotics. true or false
Answer:
True
Genes providing resistance to antibiotics will provide an organism protection against the antibiotics, which are used to kill it, therefore it is indeed an advantage for their survival
What is the weight of:
i) 1 mole of oxygen atoms?
ii)
i) 3 moles of iron atoms?
3 ?
iii) 20 moles of calcium carbonate?
Answer:
Oxygen = 15.999 g/mol
Iron = 3 × 55.845 = 167.535 g/mol
CaCO3 = 20 × 100.0869 = 2001.738 g/mol
how many atoms of carbon atoms are in the reactant
Answer:
8
Explanation:
There are 8 carbon atoms in the reactants' side, because you multiply the 2 in front of C4H10 and the 4 under the C atom, and that gives you 8. So, 8 carbon atoms.
Um Is it in third period and has three electrons in its highest P orbitals
Answer:
Shut yo musty dusty ah up zaddy
Explanation:
come here big mami
All the participants in the Genius Dog Challenge are
border collies, which some experts think are the ____
breed of dog. (This was for chemistry class so dont ask why its under chemistry)
All the participants in the Genius Dog Challenge are Border Collies, which some experts believe to be the intelligent breed of dog.
Border Collie is the name of a breed of dog that is characterized by:
It arose on the border between Scotland and England.Its main use is shepherd dog.It is a dog considered one of the most intelligent and obedient.Border Collies have physical characteristics such as:
Medium sizeCoat: double coat of thick hair that sheds often.Colors: most common are black and white.Learn more in: https://brainly.com/question/18670592
Karl likes to use cruise control when he drives on
the highway. After setting cruise control at 33.53
m/s (75 mph). At this speed, how long would it
take Karl to travel 8 kilometers?
Answer:
3.96 MINUTES
Explanation:
Karl likes to use cruise control when he drives on
the highway. After setting cruise control at 33.53
m/s (75 mph). At this speed, how long would it
take Karl to travel 8 kilometers?
VELOCITY = DISTANCE/TIME
OR
V=D/T
SO
VT=D
SO
T=D/V
THE DISTANCE IS 8 KM
THE VELOCITY IS 75 MPH
THERE ARE 1.61 KM PER MILE
SO
75M[H =
75 X 1.61 KM/H =
121 KM/HR
T=D/V
T=8/121 =0.066 HOUR =
0.066 X 60 MINUTES =
3.96 MINUTES
CHECK
75 MPH =
(75 X 1.61) KM/60 MINUTES =
120,75 KM/60 MINUTES=
2.01 KM/MINUTE
to travel 8 K,M WILL TAKE
8/2.01 = 3.98 minutes
Which candle burned the longest time why
Answer:
The one that burned longer because it burned longer
Explanation:
Which BEST explains why the Earth has layers?
A.The Earth's layers formed because the heaviest materials (like iron and nickel) float on top of the lighter materials that make up the frost.
B.The Earth's layers formed because the heaviest materials (like iron and nickel) sink below the lighter materials that make up the crust.
Answer:
B
Explanation:
I know im right I forgot some of the lessons cause this was still in grade 3 now Im grade 6....
What best describes the transition from gas to liquid
It's condensation in which gas particles have a higher kinetic energy..
Giving brainly for correct answer! :)
Answer: I think its in order, not really sure. First answer on top. Next answer on the left and the Last answer on the right.
Which of the following statements about mass is true? (1 point)
A. A truck has a mass of 2,500 kilograms in the United States. If it goes to Canada, the mass will be converted to weight.
B. A truck has a mass of 2,500 kilograms in the United States. If it goes to Canada, the mass will be less.
C. A truck has a mass of 2,500 kilograms in the United States. If it goes to Canada, its mass will still be 2,500 kg.
D. A truck has a mass of 2,500 kilograms in the United States. If it goes to Canada, its mass will be more.
Answer:
a because mass is converted into weight
How many moles of NO₂ would be required to produce 5.73 moles of HNO₃ in the presence of excess water in the following chemical reaction?
3 NO₂(g) + H₂O (l) → 2 HNO₃(g) + NO(g)
Answer:
8.595 mol NO2
Explanation:
5.73 mol HNO3 * [tex](\frac{3 mol NO2}{2 mol HNO3})[/tex] = 8.595 mol NO2
1. Calculate the density of an object that is has a mass of 24 grams and a volume of 6 cm cubed
Answer:
4g/cm cubed
Explanation:
density=mass/volume
d=24/6
d=4
Can all alkyl halides react with water to give alcohols?
Not all acid-catalyzed conversions of alcohols to alkyl halides proceed through the formation of carbocations. Primary alcohols and methanol react to form alkyl halides under acidic conditions by an SN2 mechanism.
Not all acid-catalyzed conversions of alcohols to alkyl halides proceed through the formation of carbocations. Primary alcohols and methanol react to form alkyl halides under acidic conditions by an SN2 mechanism.
In these reactions the function of the acid is to produce a protonated alcohol. The halide ion then displaces a molecule of water (a good leaving group) from carbon; this produces an alkyl halide:
Again, acid is required. Although halide ions (particularly iodide and bromide ions) are strong nucleophiles, they are not strong enough to carry out substitution reactions with alcohols themselves. Direct displacement of the hydroxyl group does not occur because the leaving group would have to be a strongly basic hydroxide ion:
We can see now why the reactions of alcohols with hydrogen halides are acid-promoted.
Carbocation rearrangements are extremely common in organic chemistry reactions are are defined as the movement of a carbocation from an unstable state to a more stable state through the use of various structural reorganizational "shifts" within the molecule. Once the carbocation has shifted over to a different carbon, we can say that there is a structural isomer of the initial molecule. However, this phenomenon is not as simple as it sounds.
- BRAINLIEST answerer
What is happening when scientists use their five senses to learn new
information?
A. Drawing a conclusion
B. Forming a hypothesis
C. Making observations
C
D. Making predictions
VIOUS
Answer:
A, drawing a conclusion
Explanation:
I need help wit this
#1
[tex]\\ \sf\longmapsto2 Ca+O_2\longrightarrow 2CaO[/tex]
Balanced
#2
[tex]\\ \sf\longmapsto N_2+3H_2\longrightarrow 2NH_3[/tex]
Balanced
#3
[tex]\\ \sf\longmapsto 2Cu_2O+C\longrightarrow 4Cu+CO_2[/tex]
Balanced
#4
[tex]\\ \sf\longmapsto H_2O_2\longrightarrow H_2O+O_2[/tex]
Already balanced
Chemistry help!
How much 1.50 M H3PO4, in mL, would you need to add to 50.00 mL of 3.50 M Ca(OH)2 in order to neutralize the solution?
_____ of mL of H3PO4
Answer:
Use the formula below
Explanation:
use the moles ratio for this by writing down the reaction and balancing the equation
0.500 mol aluminium hydroxide, Al(OH)3 reacts with 0.500 mol sulphuric acid, H2SO4 to produce aluminium sulphate and water.
a) Write the balanced equation for the reaction.
b) Which reactant is limiting reactant?
c) How many moles of excess reactant is used in the experiment?
d)Determine how many moles of aluminium sulphates was obtained if the percentage yield of aluminium sulphate during the experiment is 77%. [9 marks]
The number of moles of excess reactant is used in the experiment is 0.33 moles. The number of moles of aluminium sulphates was obtained 0.129 moles if the percentage yield is 77%.
2Al(OH)3(aq) + 3H2SO4(aq) -----> Al2(SO4)3(aq) + 6H2O(l)
Number of moles of Al(OH)3 = 0.500 mol
Number of moles of H2SO4 = 0.500 mol
We have to determine the limiting reactant as follows;
2 moles of Al(OH)3 reacts with 3 moles of H2SO4
0.500 moles of Al(OH)3 reacts with 0.500 moles × 3 moles/2 moles
= 0.75 moles of H2SO4.
This means that H2SO4 is limiting reactant
Since 3 moles of H2SO4 reacts with 2 moles of Al(OH)3
0.500 moles of H2SO4 reacts with 0.500 × 2 moles /3 moles
= 0.33 moles
Only 0.33 moles of excess reactant was used in the experiment.
3 moles of H2SO4 yields 1 mole of Al2(SO4)3
0.500 moles of H2SO4 yields 0.500 moles × 1 mole/3 moles = 0.167 moles
Theoretical yield of Al2(SO4)3 = 0.167 moles
% yield = actual yield/Theoretical yield × 100/1
Actual yield = % yield × Theoretical yield /100
Actual yield = 77 × 0.167/100
Actual yield = 0.129 moles
Learn more: https://brainly.com/question/11155928
How many mols in 22.45g of water?
Answer:
1.247mol
Explanation:
moles=mass/molar mass
molar mass of water = 1+1+16=18
mass = 22.45
22.45÷18
= 1.247 moles of water
Answer:
Explanation:
Explanation
Periodic tables vary in how many places of sig digits they show. I always use approximate values which means that you will have to redo the question using your values
Water (1 mole)
2 * H = 1.01 * 2 = 2.02
1 * O = 16 * 1 = 16.00
Mass 1 mole = 18.02
Moles water
given mass = 22.45
molar mass = 18.02
moles = given mass/ molar mass
moles = 22.45 / 18.02
moles = 1.246 moles
I will give Brainliest please help. :(
The given equation represents a chemical reaction occurring in plants. Does this chemical equation show Conservation of Mass?
Answer:
Conservation of mass occur when your chemical equation is balanced.
So let's see if it is balanced:
6CO₂ + 6H₂O ------> C₆H₁₂O₆ + O₂
You need to have the same quantity of atoms of each element on the product side and reactant side.
Reactant side: 6CO₂ + 6H₂O
Product side: C₆H₁₂O₆ + O₂
