Complete the formula. density = _____ weight/volume weight/length mass/length mass/volume
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Answer: Option (d) is the correct answer.
Explanation:
Density is defined as mass per unit volume.
Mathematically,
where d = density
m = mass
v = volume
Density is also known as degree of compactness, that is, more closely the atoms are linked more will be the mass of object or atom. Hence, more will be its density.
Thus, we can conclude that
Related Questions
which of the following types of electromagnetic radiation is most dangerous? 1) Gamma Radiation 2) Ultraviolet Radiation
Which of the following describes a species with the greatest fitness?The species that can reproduce beter than the othersThe species that is faster than the othersThe species that is stronger than the othersThe species that is larger than the others
If a catalyst is used in a reaction:a. the energy of activation increases. b. the reaction rate does not change. c. the reaction rate increases. d. the equilibrium shifts.
Which elements have the most similar chemical properties? boron and carbon oxygen and sulfur aluminum and bromine argon and silicon
The reaction is exothermic because heat was released by the reaction.
The reaction is endothermic because heat was released by the reaction.
The reaction is exothermic because heat was taken in by the reaction.
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Answer:
The reaction is exothermic because heat was released by the reaction.
Explanation:
'exothermic' means a reaction released heat over the time of the experiment.
'endothermic' means that the reaction released cold over the experiment.
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X milliliters (=X/1000 liters) of a 0.171M solution contain 0.171*X/1000 moles of NaCl.
0.171*X/1000 moles of NaCl = 58.3*0.171*X/1000 g = 1 g (as given)
58.3*0.171*X/1000 = 1
X = 100.3
B.a fish that eats smaller fish for its food
C.a giraffe that eats the leaves of trees
D.a plant that has insect larvae feeding on its roots
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(1) CH3CH2CH2CH2CH2OH = n-pentanol (pentane-1-ol)
(2) CH3CH2CH2CH(OH)CH3 = 2-pentanol (pentane-2-ol)
(3) CH3CH2CH(OH)CH2CH3 = 3-pentanol (pentane-3-ol)
(4) CH3CH2CH(CH3)CH2OH = 2-methyl-1-butanol
(5) CH3CH2C(CH3)(OH)CH3 = 2-methyl-2-butanol
(6) CH3CH(OH)CH(CH3)CH3 = 3-methyl-2-butanol
(7) CH2(OH)CH2CH(CH3)CH3 = 4-methyl-1-butanol
(8) CH3CH(CH3)CH2CH2OH = 3-methyl-1-butanol
(9) CH3C(CH3)2CH2OH = 2,2-dimethyl-1-propanol
Ether isomers:
(1) CH3CH2CH2CH2-O-CH3 = methyl butyl ether
(2) CH3CH2CH2-O-CH2CH3 = ethyl propyl ether
(3) CH3CH(CH3)CH2-O-CH3 = methyl isobutyl ether
(4) CH3CH2CH(CH3)-O-CH3 = methyl sec-butyl ether
(5) CH3CH2-O-CH(CH3)CH3 = methyl isopropyl ether
(2) beta particle (4) positron
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Answer: (3) gamma radiation
Explanation:
An isotope can decay in 4 process:
1.) Alpha decay: In this process, alpha particles is emitted when a heavier nuclei decays into lighter nuclei. The alpha particle released has a charge of +2 units.
2.)Beta-decay: In this process, a neutron gets converted into a proton and an electron releasing a beta-particle. The beta particle released carries a charge of -1 units.
3.) Gamma ray emission: in this process, an unstable nuclei gives off excess energy by a spontaneous electromagnetic process and releases . These radiations does not carry any charge and are electrically neutral.
4.) Positron decay: In this process, a proton gets converted to neutron and an electron neutrino and releases positron particles. This particle carries a charge of +1 units.
In the question, it is given that when an isotope decays, it emits only energy. It is released when an isotope undergoes gamma decay and therefore, the correct answer is gamma radiation.
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You are to convert 3.55 moles of NaCl to formula units. Always remember that the Avogadro’s number is 6.023*10^23 units per mole of a substance. Units could be atoms, molecules or formula units. So, just multiply 3.55 moles to 6.023*10^23 formula units per mole and you will get 2.138x10^24 formula units of NaCl.