SKILL LEVELMastery
Which of these subatomic particles has virtually no mass?
a
Proton
b Nucleus
C Neutron
d Electron
Chockit
int?
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Related Questions
The chemical properties of an element are largely determined by itsa. number of energy levels. b. period number. c. number of protons. d. number of valence electrons.
Carbonic acid dissolves limestone and other rocks. this is an example of _____. acid erosion chemical weathering biological weathering chemical erosion
Convert 975 kPa to mm Hg
What colors of visible light do green plant leave absorb the most
4.0 mol
6.0 mol
12 mol
36 mol
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Answer : The correct option is, 4.0 mole
Explanation : Given,
Moles of lithium = 12 mole
The given balanced chemical reaction is:
By the stoichiometry we can say that, 6 moles of Li react with 1 mole of to give 2 moles of
As, 6 moles of lithium react to give 2 moles of lithium nitride
So, 12 moles of lithium react to give moles of lithium nitride
Therefore, the number of moles of lithium nitride produced will be 4.0 mole.
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(2) Br2(l) at 266 K (4) Br2(g) at 332 K
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A rate equation can be written based on the rate constant k, concentration of reactants and half life time t1/2 of reactant if given. [A⁰] is the initial concentration of reactant A and [A]t be the final concentration.
What is rate of reaction?
Rate of a reaction is the rate of decrease in concentration of reactants or rate of increase in concentration of products. Rate of the reaction written in terms of molar concentration of reactants is called the rate law.
Consider the simplest reaction A gives B. Here the only one reactant is A. The molar concentration of A is written as [A]. The rate constant k is then,
k = [B] / [A]
If any coefficients attached with them it is written as power of the concentration term. Now, the rate of the above reaction is written as follows:
rate r = k [A]
Sometimes the initial and final concentrations of A can be considered. Where, [A⁰] is the initial concentration and [A]t be the final concentration.
The half life t1/2 is the time taken to consume half of the reactants concentration.
To find more about rate law, refer the link below:
#SPJ2
t1/2= half life
[A]= final concentration
k= rate constant
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meter is the primary unit of length in the metric system.
L (litter) volume
m (meter) length
B. 12 carbon atoms
C. 24 carbon atoms
D. 3 carbon atoms
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The fewer the carbon atoms, the closer it is to being a gas. The only one you have to check out is A which is hexane. You know that gasoline at the pumps has 8 carbons and its a liquid. So B and C are both not gases because they are above 8.
C6 (hexane) is a liquid at room temperature not a gas.
The answer is D. If there is a gas present, it must be C3