Answer: Option (D) is the correct answer.
Explanation:
It is known that relation between pressure and force is that, pressure equals force divided by area.
Mathematically, P =
where P = pressure
F = force
a = area
Hence, when there is increase in number of gas particles in a container the there will be more number of collisions due to increase in number of particles. This will lead to greater collision force and as a result there will be increase in pressure because force is directly proportional to pressure.
Thus, we can conclude that the sequence more collisions --> greater collision force --> higher pressure best describes the result of increasing the number of gas particles in a container best describes the result of increasing the number of gas particles in a container.
(2) metallic bonding
(3) nonpolar covalent bonding
(4) strong ionic bonding
Cu
F
Co
Answer: Option (a) is the correct answer.
Explanation:
Based on reactivity series, the reactivity of some metals in decreasing order is as follows.
Li, K, Ba, Ca, Mg, Al, Mn, Zn, Cr, Fe, Co, Ni
Thus, it can be seen that Al is more reactive than Fe, so it will replace iron in a single displacement reaction. Whereas cobalt is less reactive than iron hence, it will not replace Fe.
Fluorine being an anion will not replace a cation because in displacement reactions, only a cation can replace another cation and an anion can replace another anion.
Hence, we can conclude that Al will replace iron (Fe) in a compound during a single replacement reaction.
(1) LiF(aq) (3) Mg(OH)2(aq)
(2) HBr(aq) (4) CH3CHO
Answer: Option (2) is the correct answer.
Explanation:
Arrhenius acid are the species that donate a ion or proton.
For example,
Whereas LiF, , and are the substances which do not give a proton upon dissociation. Hence, they are not Arrhenius acids.
Therefore, we can conclude that substance is an Arrhenius acid.
A)It is made of matter and contains twenty-four molecules.
B)It is an element made of three types of atoms.
C)It is an atom made up of carbon, hydrogen, and oxygen.
D)It is a compound made of twenty-four total atoms of three different elements.
Answer:
The correct answer is D)It is a compound made of twenty-four total atoms of three different elements
Explanation:
Glucose (C₆H₁₂O₆) is a molecule (not an atom neither an element, so the options B and C are not completely correct). It is composed by three different elements (oxygen: O, carbon: C and hydrogen: H), and it has twenty-four atoms in its molecule: (6 x C) + (12 x H) + (6 x O)= 24. So, the option D is the one that best describes glucose.
C) it is made up of carbon, hydrogen, and oxygen
D) it is a compound made of twenty-four total atoms of three different elements
they are both right but I would go with D