which of the following are examples of single replacement reactions select all that apply.
1) Ca(OH)2(aq) + 2 HCl(aq) ----> CaCl2(aq) + 2 H2O(l)
2)Mg(s) + Zn(NO3)2(aq) ------> Mg(NO3)2(aq) + Zn(s) 3)Na2S(aq) + Cd(NO3)2(aq) ----> 2 NaNO3(aq)
4) K(s) + 2HCl(aq) ----> 2KCl (aq) +H2(g)
Answer:
4
Explanation:
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K(s) + 2HCl(aq) ----> 2KCl (aq) +H2(g) is an example of single replacement reactions.
What do you mean single replacement reactions?A single-displacement reaction, also known as single replacement reaction or exchange reaction, is a chemical reaction in which one element is replaced by another in a compound.
Single-replacement reactions always involve two pure elements and one aqueous compound/solution. In the above reaction, the A and C would be pure elements.
A single replacement reaction, sometimes called a single displacement reaction, is a reaction in which one element is substituted for another element in a compound.
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Which element has the highest electronegativity and why?
Answer:
See below
Explanation:
Hello there!
Electronegativity is the atom's tendency to attract electrons in a chemical bond
There are two trends to electronegativity:
Electronegativity increases from bottom to top in a group (Li has a greater electronegativity than Fr, for example) Electronegativity increases from left to right across a period (the further right the group, the greater the electronegativity)Looking at a period table, Sb, Sn, Te, and I are all in the same period, so we'll need to decide which element has the highest electronegativity based on the group.
Sn belongs to group 4A (group 14) Sb belongs to group 5A (group 15)Te belongs to group 6A (group 16) I belongs to group 7A (group 17)As I belongs to group 7A, the group that is the farthest right based off of the options given, I has the highest electronegativity
Hope this helps!
5. How many total atoms are in one molecule of NH3?
4 atoms
1 atom
2 atoms
3 atoms
Answer:
4 or 3 atoms; leaning towards 4 more
Explanation:
Answer:
3 atoms
Explanation:
how many atoms of hydrogen are present in a molecule of methane, CH 4
Answer: One methane molecule, CH4, contains one carbon atom and four hydrogen atoms.
Explanation:
What tiles should I put in the box?
Answer:
true&answe
Explanation:
describe the structure of a typical metal such as iron ?
assaaap
Answer:
Metals consist of giant structures of atoms arranged in a regular pattern. The electrons from the outer shells of the metal atoms are delocalised , and are free to move through the whole structure. This sharing of delocalised electrons results in strong metallic bonding .
Explanation:
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2 2.5.2 Test (CST): Computer-Scored Unit Test
Question 23 of 25
Which of the following best defines an acidic solution?
A. A solution with a pH greater than 7
B. A solution with a pH less than 0
C. A solution with a pH equal to 7
D. A solution with a pH less than 7
SUBMIT
Answer:
a solution with pH greater than 0
Explanation:
What term refers to a group of nerve cells that are connected to one another?
A. neuron
B. nerve network
C. brain
D. cerebrospinal fluid
Plot the rate curved for the
Information Provided below and
Identity where the reaction is
Complete and peak of the reaction
Time in minutes 12345678
o
Volume of gas 0 5 10 15 20 25 30 30 35
Answer:
he combustion of ethane (C2H6) is represented by the equation: 2C2H6(g) + 7O2(g) 4CO2(g) + 6H2O(l). In this reaction: (a) the rate of consumption of ethane ...
Explanation:
he combustion of ethane (C2H6) is represented by the equation: 2C2H6(g) + 7O2(g) 4CO2(g) + 6H2O(l). In this reaction: (a) the rate of consumption of ethane ...
please answer this correctly
Answer:
B. basic
Explanation:
Because acidic is sour in test, salt is tasty in taste, and neutral neither bitter, tasty and nor sour
Why does the velocity of catalyzed reaction reach maximum at certain
concentration of enzyme?
Answer:
Because the total energy of the enzyme has been used up and actions already complete
Explanation:
Catalyst are substance known to speed up rate of chemical reaction just like taking a short pathway. When velocity of catalyzed reaction reach maximum, at that moment reaction has reach it full potential (there is an equilibrium in reaction). there won't be any changes on further addition, and mostly indicate that Reaction is Complete
Which two substances are among the four major types of organic
compounds made by living things?
A. Potassium
B. Water
C. Carbohydrates
D. Proteins
Answer: Carbs and proteins
Explanation:
Answer:
the answer is proteins
Explanation:
did the problem
Which best describes a meniscus?
exchanges gases ( O2 and CO2) between the air and the blood
Answer:
Explanation: Hankins is waiting
A solar eclipse occurs during the day and can occur only during what phase of the moon?
New moon
Full moon
Answer:
New moon
Explanation:
Answer:
it is new moon
Explanation: im just smart like that
What is the relationship between number of electrons on the outer energy levels and
groups?
Answer:
Every element in a given group has the same number of valence electrons. For elements in the main groups (1-2, and 13-18), the number of valence electrons increases when moving from left to right along any period (row). The noble gases contain a full valence electron shell, which consists of eight electrons.
Explanation:
Hope this helps.
Answer:
Valence Electrons
Explanation:
Say you are looking at a neutrally charged carbon atom, it has 6 electrons. The first electron shell can hold 2 electrons. The next can hold 8, the next can hold 8 and the next can hold ten and so on... Well in the Carbon atom case, it has 6 electrons, 6-2 is 4, so the carbon atom at 4 valence electrons, which actually helps it in making organic molecules, which in turn also helps make something you might have heard of before, organisms, the best example being, humans
How many Joules are there in 3301 calories? (1 cal = 4.18 J)
Answer:
13798.18 J
Explanation:
3301 cal * 4.18 J/1 cal = 13798.18
Recall that (1 cal = 4.18 J)
37. A patient had pale tinger nail, shortness of breath and felt dizzy. The patient is most likely suffering from A. Kwashiorkor B. Marasmus C. Anaemia D. Rickets
Answer:
Anaemia
Explanation:
Symptoms: fatigue, skin pallor, shortness of breath, lightheadedness, dizziness, or a fast heartbeat.
A student is studying Earth's Layers. She is trying to determine how temperature and density change from one layer to another. Which relationship that exists between Earth's
Sversed the student mostly find
The temperature of Earth's layers decreases with depth while density increases with depth
The temperature of Earth's layers increases with depth while density decreases with depth
The temperature and density of Earth's layers decrease with depth
The temperature and density of Earth's layers increase with depth
Answer:
I believe it is D sorry if I am wrong
Explanation:
Answer:
D.
Explanation:
How many moles of CH 3CH 2OH are contained in 280 mL of 0.0788 M CH 3CH 2OH solution?
4.32×10−2mol hope it helps
when an ion has a positive charged what has the highest value of this ion ?
is it
proton
neutron
electron
nucleon
and why did you choose tte answer ?
Answer:
Highest charge +4ProtonExplanation:
Why +4?
Elements have valency starting from -4 to +4Point to be noted that only Carbon family elements can show +4 or -4 valencyFill in the [?]
73,542 m = [?] km
Give your answer in standard form.
The substance chlorine monoxide, ClO(g), is important in atmospheric processes that lead to the depletion of the ozone layer. The ClO molecule has an experimental dipole moment of 1.24 D and the Cl−O bond length is 1.60 Å.
Part A: Determine the magnitude of the charges on the Cl and O atoms in units of the electronic charge, e.
Part B: Based on the electronegativities of the elements, which atom would you expect to have a partial negative charge in the ClO molecule?
Atom O or Atom Cl
Part C: Using formal charges as a guide, propose the dominant Lewis structure for the molecule. (Draw a diagram)
Part D: The anion ClO− exists. What is the formal charge on the Cl for the best Lewis structure for ClO−?
A) The magnitude of the charges on CI and O atoms are : +0.16e and -0.16e respectively
B) Atom O will have a partial negative charge on the CIO molecule
C) Attached below
D) The formal charge on Cl is +3
A) Determine magnitude of charges on CI and O
Magnitude of charge = dipole moment / bond length --- ( 1 )
where : dipole moment = 1.24 D * [tex](\frac{3.34*10^{-30} C m}{1 D} )[/tex]
Bond length = 1.60 A° * [tex]( \frac{10^{-10} m}{A^{0} } )[/tex]
∴ Magnitude of charge = 2.56 * 10⁻²⁰ C
Note : Charge of an electron = 1.602 * 10⁻¹⁹ C
Therefore the magnitude of charges on CI and O atoms is
2.56 * 10⁻²⁰ C * [tex]\frac{1e}{1.602*10^{-19} }[/tex] = 0.16 e
Therefore
charge on CI = +0.16e
charge on O = -0.16e
Hence we can conclude that A) The magnitude of the charges on CI and O atoms are : +0.16e and -0.16e respectively and Atom O will have a partial negative charge on the CIO molecule also The formal charge on Cl is +3
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if 0.400 moles CO and 0.400 moles O2 completely react how many grams of CO2 are produces?
2CO+O2 becomes 2CO2
If 0.400 moles CO and 0.400 moles O2 completely react, 17.604 grams of CO2 would be produced.
First, let us look at the balanced equation of reaction:
[tex]2CO + O_2 ---> 2CO_2[/tex]
According to the equation, the mole ratio of CO and O2 is 2:1. But in reality, the mole ratio supplied is 1:1. Thus, CO is the limiting reactant while O2 is in excess.
Also from the equation, the ratio of CO consumed to that of CO2 produced is 1:1. Thus, 0.400 moles of CO2 would also be produced from 0.400 moles of CO.
Recall that: mole = mass/molar mass
Therefore, the mass in grams of CO2 that would be produced from 0.400 moles can be calculated as:
Mass = mole x molar mass
= 0.400 x 44.01
= 17.604 grams
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2567 milliliters to liters
Answer:
2.567 litres
Explanation:
I dont have a proper explanation sorry
Which unit represents speed?
Joules
kilometers per second
miles per hour
newtons
(Pick ONE)
Answer:
1
Explanation:
Answer:
can be SI or also know miles per second.
What is the angle between the following two hybrid orbitals on the same atom?
(a) sp and sp hybrid orbitals:
degrees
(b) sp and sp hybrid orbitals:
es
degrees
(c) sp and sp2 hybrid orbitals:
degrees
Answer: a) sp and sp hybrid orbitals:
180 degrees
(b) sp and sp hybrid orbitals:
es
120 degrees
(c) sp and sp2 hybrid orbitals:
109.5 degrees
Explanation:
The angle between the following two hybrid orbitals on the same atom is sp and sp hybrid orbitals: 180°, sp and sp hybrid orbitals: 120° and sp and sp2 hybrid orbitals: 109.5°
What is hybrid orbitals?Hybrid orbitals are defined as the outcome of a model that generates a new set of orbitals by combining atomic orbitals on a single atom.
It can also be defined as a form of atomic orbital that emerges when two or more atomic orbitals of an isolated atom mix.
It can be defined as the forming new atomic orbitals by combining two or more common atomic orbitals.
The process which forms hybrid orbitals are known as hybridization.
There are mainly five types of hybridization.
LinearTrigonal planerTetrahedral Trigonal bipyramidal OctahedralThus, the angle between the following two hybrid orbitals on the same atom is sp and sp hybrid orbitals: 180°, sp and sp hybrid orbitals: 120° and sp and sp2 hybrid orbitals: 109.5°
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PLEASE HELP ME WITH THIS I ONLY HAVE 8 MINUTES I will give you extra points . THANK YOUU
What causes high and low tides on Earth? A. The moon's gravitational pull on Earth causes water to bulge on two sides of Earth.B. Earth's rotation is so fast, water will swell and shrink twice a day.C. Earth is tilted on an axis, causing water to spread unevenly throughout the planet.D. Water swells when tsunamis occur in two areas of Earth at the same time. PLZ HELP FAST
Answer:
A.
The moon's gravitational pull on Earth causes water to bulge on two sides of the Earth.
➪What Is an Acid?❦⭐⭐❦
Answer:
a chemical that burns stuff
Explanation:
acid is something that burns it like that it goes thru it
Answer:
Acid is a sour material which have pH value less than. 7