Answer:
when 1.00 g of magnesium reacts with 5.00 g of bromine, approximately 7.57 g of magnesium bromide is formed.
Explanation:
To find the mass of magnesium bromide formed when 1.00 g of magnesium reacts with 5.00 g of bromine, you need to first write a balanced chemical equation for the reaction between magnesium and bromine. The balanced equation for the formation of magnesium bromide (MgBr2) is as follows:
Mg + Br2 → MgBr2
Now, you can calculate the molar mass of each substance involved in the reaction:
Molar mass of Mg (magnesium) = 24.31 g/mol
Molar mass of Br2 (bromine) = 2 * 79.90 g/mol = 159.80 g/mol
Molar mass of MgBr2 (magnesium bromide) = 24.31 g/mol + 2 * 79.90 g/mol = 184.11 g/mol
Next, calculate the number of moles for each reactant:
Moles of Mg = Mass (1.00 g) / Molar mass (24.31 g/mol) = 0.0411 moles
Moles of Br2 = Mass (5.00 g) / Molar mass (159.80 g/mol) = 0.0313 moles (approximately, rounded to four decimal places)
Now, determine the limiting reactant. To do this, compare the mole ratio between Mg and Br2 in the balanced equation. The balanced equation shows that 1 mole of Mg reacts with 1 mole of Br2. Therefore, the limiting reactant is the one that is present in the smaller amount relative to the balanced equation's stoichiometry.
In this case, magnesium (0.0411 moles) is present in a smaller amount than bromine (0.0313 moles). So, magnesium is the limiting reactant.
Now that you know magnesium is the limiting reactant, you can calculate the mass of magnesium bromide formed using the stoichiometry of the balanced equation. According to the balanced equation, 1 mole of Mg produces 1 mole of MgBr2.
Moles of MgBr2 formed = Moles of Mg (limiting reactant) = 0.0411 moles
Now, calculate the mass of magnesium bromide formed:
Mass of MgBr2 = Moles of MgBr2 × Molar mass of MgBr2
Mass of MgBr2 = 0.0411 moles × 184.11 g/mol = 7.57 g
So, when 1.00 g of magnesium reacts with 5.00 g of bromine, approximately 7.57 g of magnesium bromide is formed.
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Answer:
The pressure inside the wine bottle at 21 °C is 4.8 · 10² atm
Explanation:
Hi there!
We know that 1 mol of CO₂ is produced per mol of produced ethanol.
If the final concentration of ethanol is 13%, let´s calculate how many moles of ethanol are present at that concentration.
A concentration of 13% means that in 100 ml of solution, 13 ml is dissolved ethanol. We have 754 ml of solution, then, the volume of ethanol will be:
754 ml solution · (13 ml ethanol/100 ml solution) = 98 ml ethanol
With the density, we can calculate the mass of ethanol present:
density = mass/ volume
0.79 g/ml = mass / 98 ml
mass = 0.79 g/ml · 98 ml
mass = 77 g
The molar mass of ethanol is 46.07 g/mol, then 77 g of ethanol is equal to:
77 g · (1 mol/46.07 g) = 1.7 mol
Then, the number of moles of CO₂ produced will be 1.7 mol.
Using the equation of the ideal gas law, we can calculate the pressure of CO₂:
P = nRT/V
Where:
P = pressure
n = number of moles
R = ideal gas constant
T = temperature
V = volume
The volume will be the headspace of the bottle (840 ml - 754 ml) 86 ml = 0.086 l.
The temperature in kelvin will be: 21 + 273 = 294 K
The gas constant is 0.082 l atm / K mol
Then:
P = (1.7 mol · 0.082 l atm/K mol · 294 K)/ 0.086 l
P = 4.8 · 10² atm
The pressure inside the wine bottle at 21 °C is 4.8 · 10² atm
Answer:
Gaseous matter
Explanation:
Hydrogen chloride gas is formed from the combination of volumes of hydrogen gas and chlorine gas in equal proportion. It is one of the hydrogen halides I.e a compound formed from the combination of hydrogen and halogens.
Hydrogen chloride gas is a colorless gas.
Both hydrogen gas and chlorine gas can be obtained through the electrolysis of brine in the chlor alkali process.
Cl2(g) + H2(g) → 2 HCl(g)
The combination is exothermic and thus heat is released to the surroundings. A construction called HCl burner is used to carry out the reaction because of the heat given off. The produced gas is then absorbed in water
#3. A substance that interferes with the action of a catalyst is known as a(n) _____.
A. negative inhibitor
/B. either an inhibitor or negative inhibitor /C. inhibitor /D. activated complex
#4. The reducing agent in the reaction described in Fe + 2HCl → FeCl2 + H2 is
A. Fe./B. HCl./C. FeCl2.
1) Answer is: D. both B and C.
Activated complex is collection of intermediate structures in a chemical reaction that forms while bonds are breaking and new bonds are forming.
The transition state is the configuration at the peak of the diagram while the activated complex can refer to any point near the maximum.
Activation energy is the minimum energy colliding particles must have in order to react.
2) Answer is: B. chemical equilibrium.
Balanced chemical reaction: A + B ⇄ C + D.
1) In a chemical reaction, chemical equilibrium is the state in which both reactants ( and BA) and products (C and D) are present in concentrations which have no further tendency to change with time.
2) At equilibrium, both the forward and reverse reactions are still occurring.
3) Reaction rates of the forward and backward reactions are equal and there are no changes in the concentrations of the reactants and products.
3) Answer is: C. inhibitor.
Inhibitor is a substance that decreases the rate of a chemical reaction.
Inhibitor can reduce the effectiveness of a catalyst in a catalysed reaction.
Catalysis is the increase in the rate of a chemical reaction due to the participation of an additional substance called a catalyst.
Reactions occur faster with a catalyst because they require less activation energy.
4) Answer is: A. Fe.
Balanced reaction: Fe + 2HCl → FeCl₂ + H₂.
Oxidation reaction: Fe⁰ → Fe⁺² + 2e⁻.
Reduction reaction: 2H⁺ + 2e⁻ → H₂⁰.
Reducing agent is an element or compound that loses an electron to another chemical species in a redox chemical reaction and they have been oxidized.
Iron (Fe) change oxidation number from 0 to +2 (lose electrons), iron is oxidized (reducing agent).
Answer :
1) The correct option is, (D) both B and C.
2) The correct option is, (D) both A and B
3) The correct option is, (C) inhibitor.
4) The correct option is, (A) Fe
Explanation :
For part 1 :
Activated complex or transition state : It is the state where the bonds are loosened and new lose bonds are formed between them. It is unstable state and immediately dissociates to form the stable products. The arrangement of atoms takes place at the peak of the activation energy barrier.
For part 2 :
The balanced chemical reaction is,
Chemical equilibrium : It is defined as a state where the rate of forward reaction is equal to the rate of backward reaction. That means there is no net change in the concentration of the reactants and the products.
Reversibility : It is defined as, in a reversible reaction when reactant A and B react to form products C and D and in the reverse reaction, C and D react to form A and B. That means process is reversible.
For part 3 :
Inhibitor : It is the substance that decreases the rate of the chemical reaction. It can reduce the effectiveness of the catalyst in a catalyzed reaction.
Or we can say that it is a substance that interferes with the action of a catalyst.
For part 4 :
The balanced redox reaction is :
The half oxidation-reduction reactions are:
Oxidation reaction :
Reduction reaction :
From this we conclude that the 'Fe' is the reducing agent that loses an electron to another chemical species in a redox chemical reaction and itself oxidized.
Hence, the reducing agent is, Fe
Answer:
Barium Nitrate ( Ba(NO3)2 ) is an Ionic bond.
Explanation:
Ionic bonding is a type of chemical bond that involves the electrostatic attraction between oppositely charged ions, and is the primary interaction occurring in ionic compounds.
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a There are more electrons than protons.
b There are more protons than electrons.
c
There is no consistent relationship between the
numbers of protons and electrons.
d There are equal numbers of protons and electrons.
Answer:B is the right answer
Explanation: