What is the chemical equation for solutions 1, 2, and 3. What is the Net ionic equations for each solution.
Answers
Answer:
The molecular equation shows each of the substances in the reaction as compounds with physical states written next to the chemical formulas. The
complete ionic equation shows each of the aqueous compounds as separate ions. Insoluble substances are not separated and these have the symbol (s) written
next to them. Water is also not separated and it has a (l) written next to it. Notice that there are ions that are present on both sides of the reaction arrow –>
that is, they do not react. These ions are known as spectator ions and they are eliminated from complete ionic equation by crossing them out. The remaining
equation is known as the net ionic equation. For example: The reaction of potassium chloride and lead II nitrate
Molecular Equation: 2KCl (aq) + Pb(NO3)2 (aq) -> 2KNO3 (aq) + PbCl2 (s)
Complete Ionic Equation: 2K+ (aq) + 2Cl-
(aq) + Pb2+ (aq) + 2NO3–
(aq) -> 2K+
(aq) + 2NO3
–
(aq) + PbCl2 (s)
Net Ionic Equation: 2Cl-
(aq) + Pb2+ (aq) -> PbCl2 (s)
Explanation:
Hope it help yoou mark as BrainlistRelated Questions
8 gm of pure calcium is treated with 50 gram of pure Hcl to give cacl2 and h2 .which is limiting reactant?
Answers
Ca as a limiting reactant
Further explanationGiven
8 g Calcium
50 g HCl
RequiredLimiting reactant
Solution
Reaction
Ca + 2HCl → CaCl₂ + H₂
mol Ca (Ar = 40 g/mol) :
= mass : Ar
= 8 g : 40 g/mol
= 0.2
mol HCl (MW= 36.5 g/mol) :
= mass : MW
= 50 g : 36.5 g/mol
= 1.37
Mol : coefficient reactants :
Ca = 0.2/1 = 0.2
HCl = 1.37/2 = 0.685
Ca as a limiting reactant(smaller ratio)
A compound formed during the incomplete combustion of plastics shows the following percentage composition:
44.76 % C
1.25 % H
44.05 % CI 994 % O
The molar mass is known to be 321.97 g/mol. Determine the empirical formula and the molecular formula for this compound
Answers
The empirical formula : C₆H₂Cl₂O
The molecular formula : C₁₂H₄Cl₄O₂
Further explanationGiven
The percentage composition
Required
The empirical formula and the molecular formula
Solution
The mol ratio of the components :
C : H : Cl : O
=44.76/12 : 1.25/1 : 44.05/35.5 : 9.94/16
=3.73 : 1.25 : 1.241 : 0.621 divide by 1.241
= 3 : 1 : : 1 : 0.5 x 2
= 6 : 2 : 2 : 1
The empirical formula : C₆H₂Cl₂O
(Empirical formula)n=molecular formula
(C₆H₂Cl₂O)n=321.97
(160.986)n=321.97
n=2
(C₆H₂Cl₂O)₂=C₁₂H₄Cl₄O₂
The molecular formula : C₁₂H₄Cl₄O₂
I NEED HELP! The quarter is ending for me tomorrow and I have to have this in, please help if you can.
Answers
Answer:
Medium is the answer
A student walks 50 m north, stops, and then travels 32 m south. What is her displacement?
Answers
Her displacement = 18 m
Further explanationGiven
walks 50 m north and 32 m south
Required
displacement
Solution
Displacement shows vector motion that has magnitude and direction.
Displacement only looks at the distance between the starting point and the end point
Because it takes direction into account, a positive or negative sign is required
We determine that in vertical motion the upward direction is positive and the downward direction is negative
While the horizontal movement to the right is positive and the left has a negative sign
Students moving north (from the starting point) are moving positively by + 50 m
then moving south which means moving negative as far as -32 m
So that the displacement is
[tex]\tt 50-32=18~m[/tex]
Some metals are found as uncombined elements,
but most metals are extracted from ores found in
the Earth's crust. Different metals are extracted
using different methods.
Explain how the method used to obtain a metal is
related to its position in the reactivity series and to
the cost of the extraction process. In your answer,
refer to aluminium, iron and gold as examples.
(6 marks)
Answers
Answer:
no idea
Explanation:
How does Chemistry prepare you, in your career?
Answers
Answer:
Chemistry provides an excellent foundation for careers in a variety of professions and occupations in academia, government, and industry, and in diverse fields such as environmental sciences, pharmaceuticals, medicine, materials, energy, oceanography, education, health, aerospace, law, and education.
Explanation:
Answer: Hi friend! Sorry if I'm incorrect but Chemistry can prepare you for many careers. Specifically in the scientific area.
Explanation:
If you're studying to get a Chemistry major. I think chemistry shows a way of objectifying and trying to find reasons in order to solve real world application problems. When you think about it chemistry is a guide to showing you current events, such as environment and technological advances.
Which best describes the storage of the genetic code?
Answers
Answer:
A
Explanation:
A gene is a segment of DNA, a condensed DNA molecule makes up a chromosome, a chromosome is inside a nucleus, and a nucleus is contained within a cell.
Write the electron configuration for the following elements:
a. carbon
b. neon
c. sulfur
d. lithium
e. argon
f. oxygen
g. potassium
h. helium
Answers
Answer:
a.Carbon [He]2s22p2
b. Neon [He]2s22p6
c. Sulfur [Ne]3s23p4
d.Lithium [He]2s1
e. Argon [Ne]3s23p6
f. Oxygen [He]2s22p4
g.Potassium [Ar]4s1
h. Helium 1s2
This table is available to download as a PDF to use as a study sheet.
NUMBER ELEMENT ELECTRON CONFIGURATION
1 Hydrogen 1s1
2 Helium 1s2
3 Lithium [He]2s1
4 Beryllium [He]2s2
5 Boron [He]2s22p1
6 Carbon [He]2s22p2
7 Nitrogen [He]2s22p3
8 Oxygen [He]2s22p4
9 Fluorine [He]2s22p5
10 Neon [He]2s22p6
11 Sodium [Ne]3s1
12 Magnesium [Ne]3s2
13 Aluminum [Ne]3s23p1
14 Silicon [Ne]3s23p2
15 Phosphorus [Ne]3s23p3
16 Sulfur [Ne]3s23p4
17 Chlorine [Ne]3s23p5
18 Argon [Ne]3s23p6
19 Potassium [Ar]4s1
20 Calcium [Ar]4s2
21 Scandium [Ar]3d14s2
22 Titanium [Ar]3d24s2
23 Vanadium [Ar]3d34s2
24 Chromium [Ar]3d54s1
25 Manganese [Ar]3d54s2
26 Iron [Ar]3d64s2
27 Cobalt [Ar]3d74s2
28 Nickel [Ar]3d84s2
29 Copper [Ar]3d104s1
30 Zinc [Ar]3d104s2
31 Gallium [Ar]3d104s24p1
32 Germanium [Ar]3d104s24p2
33 Arsenic [Ar]3d104s24p3
34 Selenium [Ar]3d104s24p4
35 Bromine [Ar]3d104s24p5
36 Krypton [Ar]3d104s24p6
37 Rubidium [Kr]5s1
38 Strontium [Kr]5s2
39 Yttrium [Kr]4d15s2
40 Zirconium [Kr]4d25s2
41 Niobium [Kr]4d45s1
42 Molybdenum [Kr]4d55s1
43 Technetium [Kr]4d55s2
44 Ruthenium [Kr]4d75s1
45 Rhodium [Kr]4d85s1
46 Palladium [Kr]4d10
47 Silver [Kr]4d105s1
48 Cadmium [Kr]4d105s2
49 Indium [Kr]4d105s25p1
50 Tin [Kr]4d105s25p2
51 Antimony [Kr]4d105s25p3
52 Tellurium [Kr]4d105s25p4
53 Iodine [Kr]4d105s25p5
54 Xenon [Kr]4d105s25p6
55 Cesium [Xe]6s1
56 Barium [Xe]6s2
57 Lanthanum [Xe]5d16s2
58 Cerium [Xe]4f15d16s2
59 Praseodymium [Xe]4f36s2
60 Neodymium [Xe]4f46s2
61 Promethium [Xe]4f56s2
62 Samarium [Xe]4f66s2
63 Europium [Xe]4f76s2
64 Gadolinium [Xe]4f75d16s2
65 Terbium [Xe]4f96s2
66 Dysprosium [Xe]4f106s2
67 Holmium [Xe]4f116s2
68 Erbium [Xe]4f126s2
69 Thulium [Xe]4f136s2
70 Ytterbium [Xe]4f146s2
71 Lutetium [Xe]4f145d16s2
72 Hafnium [Xe]4f145d26s2
73 Tantalum [Xe]4f145d36s2
74 Tungsten [Xe]4f145d46s2
75 Rhenium [Xe]4f145d56s2
76 Osmium [Xe]4f145d66s2
77 Iridium [Xe]4f145d76s2
78 Platinum [Xe]4f145d96s1
79 Gold [Xe]4f145d106s1
80 Mercury [Xe]4f145d106s2
81 Thallium [Xe]4f145d106s26p1
82 Lead [Xe]4f145d106s26p2
83 Bismuth [Xe]4f145d106s26p3
84 Polonium [Xe]4f145d106s26p4
85 Astatine [Xe]4f145d106s26p5
86 Radon [Xe]4f145d106s26p6
87 Francium [Rn]7s1
88 Radium [Rn]7s2
89 Actinium [Rn]6d17s2
90 Thorium [Rn]6d27s2
91 Protactinium [Rn]5f26d17s2
92 Uranium [Rn]5f36d17s2
93 Neptunium [Rn]5f46d17s2
94 Plutonium [Rn]5f67s2
95 Americium [Rn]5f77s2
96 Curium [Rn]5f76d17s2
97 Berkelium [Rn]5f97s2
98 Californium [Rn]5f107s2
99 Einsteinium [Rn]5f117s2
100 Fermium [Rn]5f127s2
101 Mendelevium [Rn]5f137s2
102 Nobelium [Rn]5f147s2
103 Lawrencium [Rn]5f147s27p1
104 Rutherfordium [Rn]5f146d27s2
105 Dubnium *[Rn]5f146d37s2
106 Seaborgium *[Rn]5f146d47s2
107 Bohrium *[Rn]5f146d57s2
108 Hassium *[Rn]5f146d67s2
109 Meitnerium *[Rn]5f146d77s2
110 Darmstadtium *[Rn]5f146d97s1
111 Roentgenium *[Rn]5f146d107s1
112 Copernium *[Rn]5f146d107s2
113 Nihonium *[Rn]5f146d107s27p1
114 Flerovium *[Rn]5f146d107s27p2
115 Moscovium *[Rn]5f146d107s27p3
116 Livermorium *[Rn]5f146d107s27p4
117 Tennessine *[Rn]5f146d107s27p5
118 Oganesson *[Rn]5f146d107s27p6
Explanation:
I hope it's help
Give reason
why Iron is not found in a free state?
Answers
Answer:
Iron is in nature in the form of its compounds… it is not as a free element.
does this help?
Question 22 (1 point)
An element that is written with the formula X2 is a(n)
a diatomic element
b noble gas
С transition metal
d alkali metal
Answers
Answer:
im pretty sure its b
Explanation:
plz help me . you’re the best!! i’m really confused.
Answers
Answer:
3rd one the mass of the protons and neutrons together. The mass number (represented by the letter A) is defined as the total number of protons and neutrons in an atom. Consider the table below, which shows data from the first six elements of the periodic table. Consider the element helium. Its atomic number is 2, so it has two protons in its nucleus
Explanation:
hope this helps have a good night/day :) ❤
Convert 101 kilocalories into kilojoules.
Answers
Answer:
422.584 kilojoules.
Explanation:
Easy, just know you stuff and you'll understand.
IF CORRECT I WILL GIVE BRAINLIEST
Which statements prove a chemical reaction took place?
(there is more than one answer)
A. A student leaves a clear liquid out on the counter. In the morning, only a white solid remains
B. A student bends a glow stick to mix materials, it produces light
C. Thermal energy is added to a liquid substance until it bubbles and turns into a gas
D. Two room-temperature substances are mixed together, and the mixture becomes cold
Answers
Sorry if I’m wrong
Answer:
The correct answers are B and C
What would the mass be of a single atom of copper?
Answers
Answer:
1
atom of
Cu
has a mass of
1.055
×
10
−
22
g
.
What mass of oxygen gas (O 2 ) required to react completely with 2 moles of C 6 H 14 ?
Answers
Answer:
608g
Explanation:
This is a combustion reaction between oxygen gas and C₆H₁₄.
The reaction expression is given as:
2C₆H₁₄ + 19O₂ → 12CO₂ + 14H₂O
We have been given 2 moles of C₆H₁₄
Let us find the number of moles of oxygen gas;
2 moles of C₆H₁₄ will react with 19 moles of O₂
Mass of oxygen gas reacting = number of moles x molar mass
molar mass of oxygen gas = 2(16) = 32g/mol
Mass of oxygen gas = 19 x 32 = 608g
Look at the diagram shown below. Name the scientist who created this early attempt at a periodic table.
Group
1
IV
V
VI
Vi
VIR
H
LI
Be
B
C с
N
o
Na
Mg
A
Si
P
S
d
K
Са
?
Ті
V
Mn
Fe, Co,
NI, CU
Answers
Answer:
Russian chemist Dmitri Mendeleev
Explanation:
Russian chemist Dmitri Mendeleev
The scientist who created this early attempt at a periodic table is Russian chemist Dmitri Mendeleev.
What is periodic table?
Periodic table is defined as an arrangement of all the elements known to man in accordance with their increasing atomic number and recurring chemical properties.
It can also be defined as an organized arrangements of the 118 known chemical elements.
Dmitri Mendeleev is the first scientist who is famous for his discovery of periodic law and periodic tables. He also launched organic chemistry book.
Thus, the scientist who created this early attempt at a periodic table is Russian chemist Dmitri Mendeleev.
To learn more about periodic table, refer to the link below:
https://brainly.com/question/11155928
#SPJ2
Question 18 of 35
Which statement describes a species adapting to changes in its
environment?
O A. Dark-colored moths become common after tree trunks become
dark.
B. Tree trunks turn dark when people burn large amounts of coal.
O C. Large numbers of dark-colored and light-colored moths hatch in
forests each year.
O D. Light-colored moths are hard to see on light-colored tree trunks.
SURMET
I’m
Answers
Answer:
A. Dark-colored moths become common after tree trunks become
dark.
Explanation:
I took the test
Answer:
A
Explanation:
Same
Can O and N form a covalent bond?
Answers
Answer: Yes
The bonds between nitrogen and oxygen are covalent bonds made from sharing electron pairs.
Answer:
allimorales is correct
Explanation:
The ability of a substance to conduct electricity is called_______
Answers
Answer:
Electrical conductivity
Explanation:
Electrical conductivity - A material's ability to conduct electricity
HELP ILL GIVE BRAINLIEST
An epicenter station that records seismic waves is 7,000 km
away from the earthquake epicenter. How long after the first
P-wave did the first S-wave arrive?
Answers
Answer:
8.7min
Explanation:
The epicenter is the origin of an earthquake wave.
Since the distance between the earthquake origin and the station is 7000km and we are told to find the time after which the s - wave arrives from that of the p- waves, we follow the procedure below:
we use the graph of the travel time - distance giventrace the 7000km as the distance and find where it cuts the p-wave curve. the point is 10.3min trace it up to where 7000km intersects the s-wave curve which is at 19minSo;
The time difference = 19min - 10.3min = 8.7min
After the p-waves arrived, it took the s-waves 8.7min to reach the station.
Answer:
8.7min
Explanation:
The epicenter is the origin of an earthquake wave.
Since the distance between the earthquake origin and the station is 7000km and we are told to find the time after which the s - wave arrives from that of the p- waves, we follow the procedure below:
we use the graph of the travel time - distance given
trace the 7000km as the distance and find where it cuts the p-wave curve.
the point is 10.3min
trace it up to where 7000km intersects the s-wave curve which is at 19min
So;
The time difference = 19min - 10.3min = 8.7min
After the p-waves arrived, it took the s-waves 8.7min to reach the station.
plz mark me as brainliest.
How many molecules are in 10 moles of Hydrogen?
Answers
Answer:3.2
Mass:32
Molecular weight: 10
Moles: 3.2
what is the formula of Aluminum permanganate
Answers
Answer:
Explanation:
Thus the chemical formula for aluminium permanganate is formed by cross exchanging the coefficient of valencies of aluminium and permanganate (with each other). Thus the chemical formula for aluminium permanganate is represented as : Al(MnO4)3.
A sample of argon gas collected at a pressure of 0.918 atm and a temperature of 279 K is found to occupy a volume of 719 milliliters. How many moles of Ar gas is in the sample?
mol
Answers
explain the statement - all bases are not alkalis but all alkalis are bases
Answers
Answer:
A substance that neutralizes an acid is a base and that soluble in water is an alkali. However, all bases are not soluble in water. Thus, All alkali are bases but all bases are not alkali.
Explanation:
hope this helps ✌️
The ____________ controls the materials that move into and out of a cell.
cytoplasm
cell membrane
nucleus
Answers
Answer:
membrane
Explanation:
its semi permiable meaning it only lets certain things go in and out
Answer:
The cell membrane controls the materials that move into and out of a cell.
Explanation:
The cell membrane is selectively permeable to ions and organic molecules and controls the movement of substances in and out of cells.
I hope this helps!
which of the following organisms is not considered a polinator
Answers
What is the empirical formula for a compound which is composed of 31.9 g of Mg and 27.1 g P?
Answers
Answer:
Answer is on the pic
Explanation:
I hope it's helpful!
How many significant figures are in 114.01
Answers
Calculate the mass percent of calcium chloride in 1.00g of Calcium Chloride in 19.0 g of water
Answers
Answer:
5.26%
Explanation:
Given parameters:
Mass of calcium chloride = 1g
Mass of Water and calcium chloride = 19g
Unknown:
Mass percent of calcium chloride in the water solution = ?
Solution:
To solve this problem, we express the given mass of the calcium chloride as a percentage of the solution.
Mass percent of calcium chloride = [tex]\frac{1}{19}[/tex] x 100 = 5.26%
The mass percentage of calcium chloride is 5.26%
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