The aqueous solution and their respective properties include the following:
Al(NO3)3 - acidicRbI - neutralKHCO2 - basic CH3NH3Br - acidicWhat is pH?This is defined as the degree of acidity or alkalinity of a substance and pH from 1.0 - 6.9 is acidic, 7 is neutral while 7.1 - 14.0 is basic.
The aqueous solutions and their appropriate pH can be seen above which is the right choice.
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Which statements describe the motion of the object represented by the graph? Select three options.
The object is moving away from the origin.
The object is moving towards the origin.
The object started at the origin.
The object started at 2 meters.
The object is traveling at a constant velocity.
Answer:
The object is moving away from the origin.
Explanation:
Answer:
The object is moving away from the origin
The object started at 2 meters.
The object is traveling at a constant velocity.
Explanation:
The line on the graph is moving in the upward direction which means the farther right on the graph you go the farther up the line is. The line also has a constant slope which indicates that the object is moving at a constant rate. and if you look at x=0 the y=2 so therefor the object started at 2 meters.
Calculate the pH of a hydrochloride acid solution, HCl, whose hydronium ion (H3O)+ concentration is 8.29 X 10-4 M.
Note: answer should have three significant figures
Answer:
Explanation:
Calculate the pH of a hydrochloride acid solution, HCl, whose hydronium ion (H3O)+ concentration is 8.29 X 10-4 M.
Note: answer should have three significant figures
Consider the reaction.
A(aq)↽−−⇀2B(aq)=4.87×10−6 at 500 K
If a 2.00 M sample of A is heated to 500 K, what is the concentration of B at equilibrium?
Note the signs of equilibrium:-
Reaction don't procede forward or backwardConcentration of products and reactants remains same .So
if
Concentration of A is 2M then concentration of B should be same .
So equilibrium constant K is 1
[tex]\\ \rm\rightarrowtail K=\dfrac{[Products]^a}{[Reactants]^b}[/tex]
So
[B]=[A]^2[B]=2^2[B]=4MThe equilibrium constant K is the ratio of product of molar concentrations of products to the product of molar concentrations of reactants. The concentration of B in the given reaction is 0.0031 M.
What is rate of a reaction?Rate of a reaction is the rate of decrease in the concentration of the reactants or rate of increase in the concentration of products.
Consider the simple reaction A ⇄2B, the rate of the reaction can be written as follows:
rate = K [A]
Where, k is the equilibrium constant or rate constant and [A] is the concentration of reactant A. If A have any coefficients, then the coefficient number is written as power of the concentration term.
The equilibrium constant K = [B]²/ [A] it is given 4.87 ×10⁻⁶ . Thus concentration of B can be calculated as follows:
[B]² = K [A]
= (4.87 ×10⁻⁶)×2.00 M
=9×10⁻⁶
[B] = 0.0031 M
Hence, the concentration of the product B is 0.0031 M.
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Volume of distillate = 300 ml
Volume of Ethanol in the mixture = 450 ml
% Recovery =
Based on the distillation data provided, the percent recovery of ethanol is 66.7%
What is distillation?Distillation is a separation technique which is used to separate two miscible liquids based on differences in their boiling points.
At the boiling point of the first liquid, it distills over and is obtained by condensation.
The liquid obtained is known as distillate.
In the distillation of ethanol, the percent recovery is calculated as follows:
Percent recovery = (volume of distillate/volume of ethanol in mixture) × 100%From the data given:
Volume of distillate = 300 mlVolume of Ethanol in the mixture = 450 mlPercent Recovery = (300/450) × 100%
Percent recovery = 66.7%
Therefore, the percent recovery of ethanol is 66.7%.
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How many grams are in 1.23 x 1020 atoms of arsenic?
Given the data from the question, the mass of arsenic that contains 1.23×10²⁰ atoms is 0.0153 g
Avogadro's hypothesis6.02×10²³ atoms = 1 mole of arsenic
But
1 mole of arsenic = 75 g
Thus, we can say that:
6.02×10²³ atoms = 75 g of arsenic
How to determine the mass that contains 1.23×10²⁰ atoms6.02×10²³ atoms = 75 g of arsenic
Therefore,
1.23×10²⁰ atoms = (1.23×10²⁰ × 75) / 6.02×10²³ atoms)
1.23×10²⁰ atoms = 0.0153 g of arsenic
Thus, 1.23×10²⁰ atoms is present in 0.0153 g of arsenic
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How many grams of FeCo3 will be produced from 57.2g FeCl2
Answer:
287.30 g of FeCO₃
Solution:
The Balance Chemical Equation is as follow,
FeCl₂ + Na₂CO₃ → FeCO₃ + 2 NaCl
Step 1: Calculate Mass of FeCl₂ as,
Molarity = Moles ÷ Volume
Solving for Moles,
Moles = Molarity × Volume
Putting Values,
Moles = 2 mol.L⁻¹ × 1.24 L
Moles = 2.48 mol
Also,
Moles = Mass ÷ M.Mass
Solving for Mass,
Mass = Moles × M.Mass
Putting Values,
Mass = 2.48 mol × 126.75 g.mol⁻¹
Mass = 314.34 g of FeCl₂
Step 2: Calculate Mass of FeCO₃ formed as,
According to equation,
126.75 g (1 mole) FeCl₂ produces = 115.85 g (1 mole) FeCO₃
So,
314.34 g of FeCl₂ will produce = X g of FeCO₃
Solving for X,
X = (314.34 g × 115.85 g) ÷ 126.75 g
X = 287.30 g of FeCO₃
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what would happen if you put vegetable oil and ice cubes into a beaker together? what would happen if you left it on the counter overnight?
What is the measurement of 2 polar bears
Answer:
An adult male is between 2.4-3m (8-10 feet) in size and weighs between 350-680kg (775-1500lbs). Females are slightly smaller at around 1.8-2.4m (6-8 feet) and weigh between 150-250kg (330-550lbs).
2. Water vapor in the atmosphere is the source of
Answer:
Warmth (in addition to sunlight) at the Earth's surface.
Explanation:
Heat radiated from Earth's surface is absorbed by water vapor molecules in the lower atmosphere. The water vapor molecules, in turn, radiate heat in all directions. Some of the heat returns to the Earth's surface. Thus, water vapor is a second source of warmth (in addition to sunlight) at the Earth's surface.
Balance the equation
Before tackling this problem, be sure you know how to find the antilog of a number using a scientific calculator.
A solution has a pH of 5.4. Write the formula you will use to calculate the [H+] and then show all your work leading to the determination of [H+].
A solution has a pH of 5.4, the determination of [H+].
Given :- pH:- 5.4 pH = - log[H+]To find :- concentration of H+Answer:- Antilog(-5.4) or 4× 10-⁶Explanation:- Formula:- pH = -log H+Take negative to other side
-pH = log H+
multiple Antilog on both side
(Antilog and log cancel each other )
Antilog (-pH) = [ H+ ]
New Formula :- Antilog (-pH) = [+H]
Now put the values of pH in new formula
Antilog (-5.4) = [+H]
we can write -5.4 as (-6+0.6) just to solve Antilog
Antilog ( -6+0.6 ) = [+H]
Antilog (-6) × Antilog (0.6) = [+H]
[tex]Antilog (-6) = {10}^{ - 6} , \\ Antilog (0.6) = 4 [/tex]
put the value in equation
[tex] {10}^{ - 6} \times 4 = [H+] \\ 4 \times {10}^{ - 6} = [H+][/tex]
How many grams of aluminum oxide will you need to start with in order to make 6500 g of aluminum hydroxide?
Answer:
Explanation:
2Al(s) + 3 2 O2(g) → Al2O3(s) And given the stoichiometry ...and EXCESS dioxygen gas...we would get 6.25⋅ mol of alumina. the which represents a mass... ...6.25 ⋅ mol ×101.96 ⋅ g ⋅ mol−1 molar mass of alumina ≡ 637.25 ⋅ g.
Answer:
56.7 grams of aluminum oxide (AI²O³) are produced.Need a fast expert's response.
How can we increase the surface area of reactants?
add a catalyst
O place them in a flame
dissolve them in water
o add more particles to the solution
Answer:
O place them in a flame dissolve them in water o add more particles to the solution.
what are the states of matter for the following equation?
6Br⁻ + XeO₃ + 6H⁺ → 3Br₂ + Xe + 3H₂O
Answer:
Explanation:
On the reactant side, XeO3 is a strong oxidizing agent. It can be a solid or gas. Most likely it is in a solid state.
H+ and Br- combine to form HBr which is a weak acid. So H+ and Br- are in an aqueous state.
On the product side, both Br2 and Xe are not very soluble in water. They will be in gaseous state and H2O is water i.e. liquid state.
give the structure of chlorocyclohexane.
don't spam :)
thankyou ~
Answer:
Explanation:
This is not my photo. I got it from this website.
https://pubchem.ncbi.nlm.nih.gov/compound/Chlorocyclohexane#section=2D-Structure
A chemist adds 36.0 g of sodium chloride to 200 g of water at STP and all of the sodium chloride dissolves. What is the solute in this scenario?
Answer:
The answer is the Sodium Chloride.
Explanation:
A solute is the minor component in a solution, dissolved in the solvent, and the sodium is being dissolved in water ( or the solvent).
A chemist adds 36.0 g of sodium chloride to 200 g of water at STP and all of the sodium chloride dissolves, in this scenario sodium chloride is solute.
What are solute?Those substance which are present in the solution relatively in less amount is known as solute.
In the question given that 36 grams of sodium chloride is added in the 200 grams of water. From this it is clear that sodium chloride is a solute and water is a solvent, which additionally makes a solution.
Hence, sodium chloride is a solute.
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