Answer:
The snow gains heat to melt (endothermic), then the water releases heat to freeze (exothermic). ... Beaker becomes hot because the reaction is pushing heat out from itself onto .... solidification (ΔHsolidification) when 10.00kJ of energy are lost as 30.00g of water.
Explanation:
Answer:
<h2>1. Ionic compound-

</h2><h2>2. Polar molecular compound-

</h2>
Explanation:
Mg is a metal that has 12 atomic numbers and thus its electronic configuration is
. The outer most shell of this element has 2 electrons so it loses 2 electrons and thus form
ions. Br is a nonmetal and has 35 atomic number so its electronic configuration is
. Since its outermost shell has 7 electrons so it can accept one electron and thus forms
. So magnesium ion and bromide ion combine and forms an ionic compound
.
P is also a nonmetal and combine with Br with covalent bond and due to electronegativity differences form polar covalent compound such as
.
Answer: The correct answer is "B" two bonding domains(or bonding pairs) or two non bonding domains(or lone pairs)
Explanation:
Molecular geometry/structure is a three dimensional shape of a molecule. It is basically an arrangement of atoms in a molecule.It is determined by the central atom, its surrounding atoms and electron pairs.According to VSEPR theory, there are 5 basic shapes of a molecule: linear, trigonal planar, tetrahedral, trigonal bipyramidal and octahedral.
A)Four bonding domains and zero non bonding domains: shape is tetrahedral and bond angle is 109.5°
B)Two bonding domains and two non bonding domains(lone pairs): shape is bent and bond angle is 104.5°
C)Three bonding domains and one non bonding domain: shape is trigonal pyramidal and bond angle is 107°
D)Two bonding domain and zero non bonding domain: shape is linear and bond angle is 107°
E)Two bonding domain and one non bonding domain: bent shape and bond angle is 120°
F)Three bonding domains and zero nonbonding domain: shape is trigonal planar and bond angle is 120°
Hence Two bonding domains and two non bonding domains have the smallest bond angle.
Answer:
Compression of hydrogen gas within the container.
Answer : BaS
will be the precipitate which will be formed.
Explanation : When all the three solutions namely;
are mixed together a white precipitate of BaS
is formed as a product in the solution along with the soluble by product of Ammonium nitrate which is