5.4 g of Aluminium reacts with 300 mL of 0.2 mol/L hydrochloric acid solution. a. Write equation for the reaction taking place. b. Specify which reactant is limiting and which reactant is excess. c. Find volume of the gas collected at S.T.P d. How many grams of salt are produced at the end of the reaction? e. How many grams of the excess reactant are left ate the end of the reaction? Given: Al=27 , H=1 , Cl=35.5
HCl as a limiting reactant
volume of the gas(H₂)= 0.672 L
mass of salt : =2.67 g
mass of excess left : 4.86 g
Further explanationGiven
5.4 g Al
300 mL of 0.2 mol/L HCl
Required
limitng reactants
volume of the gas(H₂)
mass of salt
mass of excess left
Solution
Limiting reacttantReaction
2Al + 6HCl → 2AlCl₃ + 3H₂
mol Al = 5.4 g : 27 g/mol = 0.2
mol HCl = 0.3 L x 0.2 mol/L = 0.06
mol : coefficient of reactants :
Al = 0.2 : 2 = 0.1
HCl = 0.06 : 6 = 0.01
HCl as a limiting reactant(smaller ratio)
Al as an excess reactant
volume of H₂mol H₂ = 3/6 x mol HCl = 3/6 x 0.06 = 0.03
volume (STP : 1 mol=22.4 L) :
= 0.03 x 22.4 L
= 0.672 L
mass of salt(AlCl₃)mol AlCl₃ = 2/6 x mol HCl = 2/6 x 0.06 = 0.02
mass AlCl₃ :
= mol x MW
= 0.02 x 133.5
=2.67 g
mass of excess(Al) leftmol (reacted) : 2/6 x mol HCl = 2/6 x 0.06 = 0.02
mol (unreacted) : 0.2 - 0.02 = 0.18
mass = 0.18 x 27 g/mol = 4.86 g
Calculate the volume, at STP, of a 0.950 g sample of Carbon Monoxide gas, CO.
Answer:
0.76L is the pressure of CO at STP
Explanation:
To solve this question we must use combined gas law:
PV = nRT
Where P is the pressure of the gas (1atm at STP)
V is volume (Our incognite)
n are moles of the gas (0.950g * (1mol/28g) = 0.034 moles
R is gas constant (0.082atmL/molK)
T is absolute temperature (273.15K at STP)
V = nRT/P
V = 0.034mol*0.082atmL/molK*273.15K / 1atm
V = 0.76L is the pressure of CO at STP
i really need help on this one!!
Suppose Earth’s gravitational force were decreased by half. How would this change affect a game of basketball? Think about the motion of the players and the ball.
Answer:
Due to the decrease in the gravitational force, it will take longer time for ball to reach the ground while dribbling. Moreover, the hang time of players will also be longer. This means that the players will stay on air longer and will be able to jump higher.
Which three elements have the most similar chemical properties?
1.
Ar, Kr, Br
2
K, Rb, Cs
3.
B, C, N.
4.
O, N, Si
Answer:
2.
Explanation:
Beacuse they are all group 1 metals. All have the same boiling, melting point and reactivity due to one electron in its outer shell.
Potassium(k), rubidium(Rb), and cesium(Cs) are the three elements from the given list that have the most similar chemical properties.
Therefore the correct answer is option 2.
What is the atomic number?The total number of protons present in an atom is known as the atomic number of that atom. The atomic number has no correlation either with the number of neutrons or the number of electrons present inside an atom.
While the atomic mass of an atom is the sum of the total number of protons and the number of neutrons present inside of any atom.
From the list of elements, potassium (k), rubidium (Rb), and cesium (Cs) are the three that share the most chemical similarities.
Thus, option 2 is the right response.
To learn more about the atomic number from here, refer to the link;
brainly.com/question/14190064
#SPJ6
9. A container has 56 g of Sc and 95 g of Br 2 in it. If the reaction goes to completion, what is the maximum amount of ScBr3 which could be produced?
Answer:
c
Explanation:
Iron sulfide is a compound. It is made by heating a mixture of iron and sulfur.
Describe and explain the differences between iron sulfide and a mixture of iron and sulfur.
Answer:
Here are some of the differences between a mixture of iron and sulfur, and iron sulfide: the mixture can contain more or less iron, but iron sulfide always contains equal amounts of iron and sulfur. the iron and sulfur atoms are not joined together in the mixture, but they are joined together in iron sulfide.
Explanation:
Is the method for converting molecules to moles the same as that for atoms?
Answer:
One mole is the Avogadro's number of particles (atoms, molecules, ions or electrons) in a substance. Converting to moles is fairly easy because the conversion is always the same.
The smallest fundamental of an element is called an atom while two or more atoms join together to produce a molecule. Molecules are the fundamental of any given compound or a substance.
Yes, the method of converting molecules and atoms to moles are similar.
The method of conversion can be explained as:The moles are defined by the presence of Avogadro's number that gives the number of particles present in a substance.The method of converting molecules into moles requires the division of the molecules by [tex]6.02 \times 10^{23}[/tex]. This number which is used in dividing is called Avogadro's number.For converting atoms into moles the number of atoms is divided with the Avogadro's number [tex]6.02 \times 10^{23}[/tex].Therefore, the conversion to moles is easy and the same.
Learn more about moles and Avogadro's number here:
https://brainly.com/question/16398159
0.65743 In scientific notation
Please help with this
1. Double-Replacement reactions
2. Decomposition
3. Combustion
4. Syntesis
5. Single replacement
Further explanationGiven
Chemical equations
Required
Type of reaction
Solution
1. 2AgNO₃ + MgCl₂ ⇒ 2AgCl + Mg(NO₃)₂
Double-Replacement reactions. Happens if there is an ion exchange between two ion compounds in the reactant
2. 2KBr⇒2K +Br₂
Decomposition
Single compound breaks down in to 2 or more products
3. C₃H₈ + 5O₂ ⇒ 4H₂O + 3CO₂
Combustion
Hydrocarbon and Oxygen reaction and form water and carbon dioxide
4. NaO + H₂O ⇒ NaOH
Syntesis
2 or more reactants combine to form a single product
5. Zn + CuCl₂ ⇒ZnCl₂ + Cu
Single replacement
One element replaces another element from a compound
Explain how the temperature of a substance is related to the kinetic of it molecules.
Answer: this is the explanation
Explanation:
the temperature of a substance is related to the average kinetic energy of the particles of that substance. When a substance is heated, some of the absorbed energy is stored within the particles, while some of the energy increases the motion of the particles
Explain how natural resources are identified and why natural recourses are in evenly distributed.
Answer:
Natural resources are not evenly distributed all over the world. Some places are more endowed that others — for instance, some regions have lots of water (and access to ocean and seas). Others have lots of minerals and forestlands. Others have metallic rocks, wildlife, fossil fuels and so on.
Explanation:
HELP HELP IM FAILING PLZ HELP ME
What is the formula mass of calcium nitrate tetrahydrate (Ca (NO3)2 · 4H0]?
Be sure to add the water of hydration, which is the 4H2O part (water surrounding the calcium
nitrate).
102 g/mol
164 g/mol
174 9/mol
236 g/mol
Answer:
236 g/mol
Explanation:
This question is asking to calculate the molar mass/formula mass of calcium nitrate tetrahydrate with the chemical formula: Ca(NO3)2 · 4H20. This is done as follows:
Atomic mass of the constituent elements are as follows:
Ca = 40
N = 14
O = 16
H = 1
Hence, in Ca(NO3)2 · 4H20.
= 40 + {14 + 16(3)}2 + 4 {1(2) + 16}
= 40 + {14 + 48}2 + 4{2 + 16}
= 40 + {62}2 + 4{18}
= 40 + 124 + 72
= 236
Hence, the molar mass of Ca(NO3)2 · 4H20 is 236g/mol.
Answer:
236 g/mol
Explanation:
Water is not an element because it:
Answer:
because is made of more than on type of atom
What is the answer for this?
10
If velocity is positive, which would most likely yield a negative acceleration?
O O OO
A final velocity that is faster than an initial velocity.
A time that is less than a half hour.
An initial velocity that is faster than a final velocity.
A time that is greater than a half hour.
Answer:
An initial velocity that is faster than a final velocity
Explanation:
The relationship between velocity and acceleration is given as follow;
Acceleration = Change in velocity / Time
Change in Velocity = Final Velocity - Initial Velocity
From the formular, time is not able to affect the sign of the acceleration.
A negative acceleration is also referred to as deceleration and this occurs when there is a drop in velocity.
A drop in velocity occurs when the initial velocity is faster than the final velocity.
When animals breathe, which of Earth's sphere's are interacting?
Which of the following is TRUE about an astronaut traveling from planet to planet?
The weight changes, but his or her mass does not.
The weight and mass both stay the same.
The weight and mass both change.
The mass changes, but his or her weight does not. PLEASE ANSWER QUICKLY
Answer:
The weight changes, but his or her mass does not.
Explanation:
The true statement from the given choices about an astronaut traveling from planet to planet is that the weight changes but his or her mass does not.
This is due to the difference in acceleration due gravity from one planet to the other.
Mass is the amount of matter present within a substance. Weight is the vertical force on a body due to its mass and acceleration due gravityGravity from one planet to the other differs significant and so is the weight.
How many milliliters of an aqueous solution of 0.222 M manganese(II) iodide is needed to obtain 9.57 grams of the salt?
Answer:
139 mL
Explanation:
Given data:
Volume of solution required = ?
Molarity of solution = 0.222 M
Mass of salt = 9.57 g
Solution:
Number of moles of manganese iodide:
Number of moles = mass/molar mass
Number of moles = 9.57 g/ 308.75 g/mol
Number of moles = 0.031 mol
Volume required:
Molarity = number of moles of solute / volume in L
0.222 M = 0.031 mol / V
V = 0.031 mol / 0.222 mol/L
V = 0.139 L
Volume in mL:
0.139 L ×1000 mL / 1 L
139 mL
The ability to pound metal into a flat sheet without breaking it is:
A. Luster
B. Malleability
C. Ductile
Answer: B
Explanation: Cuz .
Answer: The answer to your question is A
Explanation: Hey I miss you
Please help me I hate chemistry
disolvin rate is The rate at which a solute dissovles depends upon the size of the solute particles. Dissolving is a surface phenomenon since it depends on solvent molecules colliding with the outer surface of the solute.
saturation the degree or extent to which something is dissolved or absorbed compared with the maximum possible, usually expressed as a percentage.
changes in solubility For many solids dissolved in liquid water, the solubility increases with temperature. The increase in kinetic energy that comes with higher temperatures allows the solvent molecules to more effectively break apart the solute molecules that are held together by intermolecular attractions.
The concentration of a solution is a measure of the amount of solute that has been dissolved in a given amount of solvent or solution. A concentrated solution is one that has a relatively large amount of dissolved solute. A dilute solution is one that has a relatively small amount of dissolved solute.
dilution is the making something weaker in force, content, or value.
Colligative properties of solutions are properties that depend upon the concentration of solute molecules or ions, but not upon the identity of the solute. Colligative properties include vapor pressure lowering, boiling point elevation, freezing point depression, and osmotic pressure.
_____ are bits and pieces of material that end up in a body of water.
Answer:
sediments
Explanation:
What kind of information does this map show?
A. The roads that connect different cities
OB. The shapes of different landforms
O C. The elevation of Earth's surface features
D. The natural resources found in different areas
show how to work out...Calculate the mass in grams of 3.50 x 1025 atoms of lithium. Answer: 404g Li
A boat covers 2,000 meters in 30 minutes. How fast are they traveling
i need help i hate multi selects. 100 points please let me know
Answer:
d would be both liquids and gasses
Explanation:
Answer:
A. Gases
B. Solids
C. Gases
D. liquids and solids
So basically all ur answers are right except D
Explanation:
Brainlist?
What ideas do you have about how two places
could have the same amount of sunlight but
different skin cancer rates?
Answer:
it could depend on the environment of the area, how the sun rays are parting through particles in the air, or it jus might be the amount of heat radiation is coming down cause it could be a chilly sunny day or a hot sunny day
Guys pleasee helpp 20 points
Hydrazine, N2H4, and hydrogen, H2O2, have been used as rocket propellants. They react according to the equation:
H2O2 + N2H4 → N2 + H2O
a. How many moles of N2 are formed from 0.0250 moles of N2H4? (0.0250)
b. How many moles of H2O2 are required if 1.35 moles of H2O is to be produced? (0.675)
c. How many moles of H2O are formed if 1.87 moles of N2 is produced? (7.48)
Explanation:
The equation of the reaction is;
H2O2 + N2H4 → N2 + H2O
Upon balancing the reaction, we have;
N2H4 + 2H2O2 → N2 + 4H2O
a. How many moles of N2 are formed from 0.0250 moles of N2H4?
From the equation of the reaction;
1 mol of N2H4 produces 1 mol of N2
0.0250 mol of N2H4 would produce x mol of N2
1 = 1
0.0250 = x
x = 0.0250 * 1 / 1 = 0.0250 mol
b. How many moles of H2O2 are required if 1.35 moles of H2O is to be produced?
From the equation of the reaction;
2 mol of H2O2 produces 4 mol of H2O
x mol of H2O2 produces 1.35 mol of H2O
2 = 4
x = 1.35
x = 1.35 * 2 / 4 = 0.675 mol
c. How many moles of H2O are formed if 1.87 moles of N2 is produced?
The relationship between H2O produced and N2 is;
For every 1 mol of N2 produced, 4 mol of H2O is produced
1.87 mol of N2 produced, how many moles of H2O is produced?
1 = 4
1.87 = x
x = 1.87 * 4 / 1 = 7.48 mol
The amount of force on an area is know as volume, acceleration, pressure, or momentum
Answer:
Pressure
Explanation:
Which equation is derived from the combined gas law?
StartFraction V subscript 1 over T subscript 1 EndFraction equals StartFraction V subscript 2 over T subscript 2 EndFraction.
StartFraction V subscript 1 over T subscript 2 EndFraction equals StartFraction V subscript 2 over T subscript 1 EndFraction.
V subscript 1 T subscript 1 equals P subscript 2 T subscript 2.
P subscript 1 V subscript 1 T subscript 1 equals P subscript 2 V subscript 2 T subscript 2.
I put "A" as my answer and got it correct....so V1/T1 = V2/T2 is your answer :)
Answer:
if you are correct then my dude... you are correct
Correct = A)
Explanation:
~Notify me if you have questions~
no reason in saying "hope this helps" lol
-Note I can be vented to if needed-
Have a nice day!~
^ω^
-- XxFTSxX
Answer:
The answer is A
Explanation:
I got 100% on the Quiz on Edge 2021