_____ is the time required for one-half of the atoms of a radioisotope to decay to products. a. fusion
b. radioactivity
c. half-life
d. fission
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How many atoms are present in 3.500 mol of NH3? NEED ANSWER ASAP
Dr. Bunsen has a problem—he stored a rack of six bottles filled with clear colorless liquids too close to a heat vent and the labels fell off of each of the bottles. He needs your help in order to correctly identify each of the solutions. Below is a list of the solutions: Pure DI water 0.10 M AgNO3 0.20 M HCl 0.20 M HNO3 0.20 M KOH 0.50 M NaHCO3 we are provided with ph paper and phenolphthalein
What is the common name for calcium silicate?
Helppp please help.
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2Mg + O2 = 2MgO.
Then we need to know which of the reactant is limiting. We do that by multiplying the number of moles of reactant to the stoichiomeric coefficient. For Magnesium: 97.2 g
For O2: 88.5g*
Since O2 has the smaller moles, this is the Limiting reactant. Then we solve basing on the number of O2 used.
88.5g
Answer : The mass of magnesium oxide produced will be, 161.2 g
Solution : Given,
Mass of Mg = 97.2 g
Mass of = 88.5 g
Molar mass of Mg = 24.3 g/mole
Molar mass of = 32 g/mole
Molar mass of MgO = 40.3 g/mole
First we have to calculate the moles of Mg and .
The balanced reaction is,
As, 2 moles of Mg react with 1 moles of
So, 4 moles of Mg react with moles of
From this we conclude that the is in excess amount and Mg is in limited amount.
Now from the reaction we conclude that
As, 2 moles of Mg react to give 2 moles of MgO
So, 4 moles of Mg react to give 4 moles of MgO
Now we have to calculate the mass of MgO.
Therefore, the mass of magnesium oxide produced will be, 161.2 g
This reaction is best described as
(1) addition involving a saturated hydrocarbon
(2) addition involving an unsaturated hydrocarbon
(3) substitution involving a saturated hydrocarbon
(4) substitution involving an unsaturated hydrocarbon
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This reaction is best described as substitution involving a saturated hydrocarbon. Therefore, the correct option is option C.
When one atom or group of atoms in a molecule is replaced by another atom or group of atoms, the chemical reaction is known as a substitution reaction. Usually, a reactant molecule and a reagent molecule, which supplies the replacing atom or group, engage in this reaction. Nucleophilic substitution and electrophilic substitution are the two primary categories of substitution processes. A nucleophile (a substance rich in electrons) can replace another atom or group in a molecule in nucleophilic substitution processes. A nucleophile combines with an electrophile (an electron-deficient species) in organic chemistry regularly to produce this kind of reaction, which results in the formation of a new molecule.
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involving a saturated hydrocarbon. You
have substitued a chlorine atom for one of the hydrogen atoms, and the hydrocarbon you start with (ethane) is fully saturated.
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In the given reaction, Fe is the reducing agent and V is the oxidizing agent.
What is a reducing agent?
An atom or compound that loses its electrons to other substances in a reduction-oxidation reaction and gets oxidized to a higher valency state is called a reducing agent.
A reducing agent can be defined as one of the reactants of a redox reaction that reduces the other reactant by giving its electrons to the reactant. If the reducing agent can not give away its electrons to others in a reaction, then the reduction reaction cannot occur.
Given, the following chemical reaction:
2Fe + 3V₂O₃ → Fe₂O₃ + 6VO
The V₂O₃ oxidation state of V:
2 x + 3(-2) = 0
2x = 6
x = + 3
The Fe₂O₃ oxidation state of Fe:
2 y + 3 (-2) = 0
2y = 6
y = + 3
The V acts as an oxidizing agent because it accepts one electron to change the oxidation state from +3 to +2.
Fe acts as a reducing agent because it gives out its electrons to change the oxidation state from 0 to +3.
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Explanation:
Fe- reducing agent (since it is oxidized to fe203)
v203- oxidizing agent(since it is reduced)
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Answer:
The mechanical energy of the system increases, provided there is no loss of energy due to friction. The energy would transform to kinetic energy when the speed is increasing. The mechanical energy of the system remains constant provided there is no loss of energy due to friction.
Explanation:
Final answer:
An object's mechanical energy generally increases as its velocity increases. This is because mechanical energy is the sum of an object's kinetic and potential energy, and kinetic energy is directly proportional to the square of its velocity.
Explanation:
In physics, mechanical energy is the energy that an object has due to its motion (kinetic energy) and position (potential energy). When an object's speed or velocity changes, specifically increases, so does its kinetic energy, as kinetic energy is directly proportional to the square of the object's velocity. Essentially, if an object's velocity doubles, its kinetic energy would quadruple. However, this does not take into account variables like air resistance, friction, or changes in potential energy. In an ideal, frictionless scenario, an increase in an object's velocity directly results in an increase in its mechanical energy.
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The compound NaCI is an example of a salt. Salt is formed from a neutralization action of an acid and a base.