How are half-reaction useful?
Answer:
Half-reactions are often used as a method of balancing redox reactions. For oxidation-reduction reactions in acidic conditions, after balancing the atoms and oxidation numbers, one will need to add H + ions to balance the hydrogen ions in the half reaction.
Explanation:
Answer:
We can use the half-reaction method to balance the equations of redox reactions occurring in aqueous solution. ... Each half-reaction is balanced for mass and charge, and then the two equations are recombined with appropriate coefficients so that the electrons cancel.
Explanation:
In Raoult’s law, what happens to the partial pressure of the solution when the mole fraction of the solvent increases?
Answer: c. it increases
Explanation:
Iodine gas in a container is heated over a flame. What happens to the average kinetic energy of the iodine particles
Answer:
Explanation: "As a sample of matter is continually cooled, the average kinetic energy of its particles decreases. Eventually, one would expect the particles to stop moving completely. Absolute zero is the temperature at which the motion of particles theoretically ceases"
Which statement is FALSE?
1) atoms in the same period have the same number of outer electrons
2) atoms in the same group behave in a similar manner during a chemical
reaction
3) the outer electrons are the electrons in the outer energy level of an atom
4) the number of outer electrons may be used to predict how an element would
react in a chemical reaction
Answer: I think the answer is 2.
Explanation:
Besides mammals, name another group of organisms that primarily continues to care for their young after birth O birds O amphibians O reptiles O cnidarians
Answer:
I'm pretty sure it's birds or amphibians
Explanation:
on a map directions are sometimes given by a symbol called a
Answer:
a compass rose
Polar air masses bring warm temperature and have lower air temperature? T or F
Answer:
t? im pretty sure have a good day
Time: Continents Over Time View Hint Place all the images on the timeline before you click the "Check” button. If you get stuck, click on the "View Hint" button, and to start over, click on the "Reset Images" button. C o 225 million years ago 200 million years 135 million years 65 million years ago Today ago ago e Reset images Check Next Chapter: Plates & Boundaries Dunamic Earth Cita Man
Answer:
Explanation:
45
Which of the following pairs of elements would most likely
undergo a violent reaction if combined with each other?
a
Fe and CI
b Cs and F
C Zn and S
d Kand o
Check it
GOT IT
Answer: cs and F
Explanation:
Which part of the cell is the anode?
Х
Y
W
Z
The total number of atoms in 3Na2O?
Answer:
5 atoms
Explanation:
3 sodium
2 oxygen
Most acids form ions in solution by ionizing, and most bases form ions in solution by
There are other ions that make acidic and basic solutions, but we won't be talking about them here. That pH scale we talked about is actually a measure of the number of H + ions in a solution. If there are a lot of H + ions, the pH is very low.
Hope I helped :)
If the common element of Fluorine-9 and one of the isotopes is Fluorine-10, what does the -10 tell us about the element and how many protons and neutrons does the element have?
flourine have 9 proton
19 neutrons and 9 electron
mark be a brain list
WILL GIVE BRAINLIEST
at which distance from refrigerator door would a magnetic force of attraction be weakest
A 7cm
B 3cm
C 1cm
D 10cm
Answer:
10 cm
Explanation:
because the magnetic force of attraction becomes weaker from a greater distance.
Answer:
D 10cm
Explanation:
As the distance between the two objects(magnet and Ferromagnetic Metals and Alloys) increases the magnetic for will decrease
if a iron nail is kept 1cm far from a magnet then the magnet will atract it easily but if the same iron nail is kep 3cm far from the magnet then the magnet won't attract it easily .
(Ferromagnetic materials such as iron, nickel and cobalt are attracted to magnets, as well as rare-earth metals like gadolinium, neodymium and samarium.)
Hope you've understood
helpppp nowww plsss!!
Answer:
Solar energy.
Explanation:
Solar Energy,
Renewable sources are those, which can be used again and again so, solar energy is the answer.
PLEASE HELP
What heat transfer is a Heater.
Answer:
All electric heaters make use of one or more of the fundamental heat transfer mechanisms – namely convection, conduction, or radiation.
For regular...
Conduction is heat transfer by direct contact, like frying an egg. Convection is heat transfer by the movement of gases or liquids, like most home furnaces, clothes dryers, or car heaters. Radiation is the transfer of heat in waves through space, like the sun or a fire.
chemical equation for cycloheptane (l)
Answer: C7H14 - PubChem.
Explanation:
What part of an atom is responsible for combing the atoms together (bonding) to form a new substance?
Are theories always Correct?
Answer:
no, theories are not always correct
Balance the following reaction: _Na3PO4+_Ca(NO3)2-->_NaNO3+_Ca3(PO4)2
The balanced equation
2Na₃PO₄+3Ca(NO₃)₂⇒6NaNO₃+Ca₃(PO₄)₂
Further explanationGiven
Reaction
_Na3PO4+_Ca(NO3)2-->_NaNO3+_Ca3(PO4)2
Required
Balanced equation
Solution
Give a coefficient
aNa₃PO₄+bCa(NO₃)₂⇒cNaNO₃+Ca₃(PO₄)₂
Ca, left=b, right = 3⇒ b=3
P, left=a, right = 2⇒a=2
Na, left=3a, right=c⇒3a=c⇒3.2=c⇒c=6
The equation becomes :
2Na₃PO₄+3Ca(NO₃)₂⇒6NaNO₃+Ca₃(PO₄)₂
53.0 g of silver (1) nitrate reacts according to the reaction shown below:
AgNO3 + KCI — AGCI + KNO3
Find the theoretical yield of AgCl. If the amount of AgCl actually produced is 38.5 grams,
what is the percent yield of the experiment?
Answer:
Percent yield = 86.09%
Theoretical yield of AgCl = 44.72 g
Explanation:
Given data:
Mass of silver(1) nitrate = 53.0 g
Actual yield of AgCl = 38.5 g
Theoretical yield of AgCl = ?
Percent yield = ?
Solution:
Chemical equation:
AgNO₃ + KCl → AgCl + KNO₃
Number of moles of AgNO₃:
Number of moles = mass/molar mass
Number of moles = 53.0 g/ 169.87 g/mol
Number of moles = 0.312 mol
now we will compare the moles of AgNO₃ and AgCl
AgNO₃ : AgCl
1 : 1
0.312 : 0.312
Theoretical yield of AgCl:
Mass = number of moles × molar mass
Mass = 0.312 mol × 143.32 g/mol
Mass = 44.72 g
Percent yield:
Percent yield = (actual yield / theoretical yield) × 100
Percent yield = ( 38.5 g / 44.72 g ) × 100
Percent yield = 86.09%
Which of the following is not a chemical change?
a. paper being shredded
b. steel rusting
c. charcoal burning
d. a newspaper yellowing in the sun
Answer:
paper being shredded
Explanation:
Answer:
its A
Explanation:
5. Identify each of the following as an element, a mixture, or a compound.
a. aluminum foil
b. air
C. water
d. salt water
e. copper
wire
f. steel
Answer:
Aluminum foil ~ element
Air ~ mixture
Water ~ compound
Salt Water ~ mixture
Copper Wire ~ element
Steel ~ element
typhoons come from warm waters in the ocean true or fales
Answer:
True
Explanation:
A typhoon forms when wind blows into areas of the ocean when the water is warm. These winds collect moisture and rise, while colder air moves in below. This creates pressure, which causes the winds to move very quickly. The wind rotates, or spin, around a center called an eye.
H2o is initially present in a state where its molecules are far apart. During a change of state, its molecules slow down. Which change of state has most likely taken place?
from a gas to a liquid
from a liquid to a gas
from a solid to a liquid
from a gas to a plasma
Answer: from a gas to a liquid
Explanation:
The change of state that has most likely taken place is from a gas to a liquid, where the molecules slow down and move closer together due to a decrease in temperature or an increase in pressure.
What are states of matter?Matter is anything that occupies space and has mass. The three fundamental states of matter are solid, liquid, and gas. Solids have a definite shape and volume, with tightly packed molecules that vibrate in place. Liquids have a definite volume but no definite shape, with molecules that can slide past one another.
Gases have neither a definite shape nor a definite volume, with molecules that are widely separated and move freely in all directions. A fourth state of matter, plasma, also exists and is formed at extremely high temperatures or by ionizing a gas. In plasma, electrons have separated from their nuclei to form a cloud of charged particles.
Other, more exotic states of matter have also been observed under extreme conditions, such as Bose-Einstein condensates and quark-gluon plasma.
Learn more about states of matter, here:
https://brainly.com/question/29069107
#SPJ7
Describe a Mesosaurus.
Mesosaurus lived in freshwater lakes and ponds. Elongated and slim, it measured about 3.3 feet long. The skull and tail were both long and narrow, and the animal probably undulated through the water as it fed on small crustaceans and other prey with its jaws, which were full of long, thin, pointed teeth.
You are making a temperature measurement with a lab thermometer. The increments (markings) are 1°C. You see that the temperature is about 1/3 of the way from 21°C to 22°C. How would you record this temperature? How many significant figures does it have? In what place value is the smallest certain digit? In what place value (tens, ones, tenths, etc.) is the uncertain digit?
Answer: 21.3, 3 sig figs, units certain, tenths uncertain
Explanation:
The temperature is 21.3 degrees Celsius, This temperature has 3 significant figures. The smallest certain digit is in the tenth place and the uncertain digit is in the decimal place.
What are significant figures?
The number that is given as digits is established using significant figures. A meaningful representation of numbers is carried by these digits. Frequently, significant numbers are employed in place of figures. By counting all of the values beginning with the first non-zero digit on the left, we may determine the number of significant digits. 12.45, for instance, contains four significant numbers.
Therefore, in the above observation, the temperature is 21.3 degrees Celsius, This temperature has 3 significant figures. The smallest certain digit is in the tenth place and the uncertain digit is in the decimal place.
Read more about significant digits, here
https://brainly.com/question/1658998
#SPJ2
would you consider alcohol as food nutrient? explain.
Answer:
Explanation:
No I would consider it a drug
Alcohol is considered a drug and doesn't fall under the category of food nutrients.
What is alcohol?Alcohol is a drink that contains ethanol. It is a type of alcohol that acts as a drug and is formed by the fermentation of fruits, grains, or sources of sugar.
Alcohol is classified as a depressant which means it slows down vital functions resulting in unsteady movement, slurred speech, and an inability to react quickly.
Alcohol overdose creates even more painful, depressant effects such as toxicity where the body vomits the poison, and finally unconsciousness, coma, or death. These reactions depend upon the quantity of consumption of alcohol and how quickly.
Alcohol is a drug that damages a person’s ability to think rationally and distorts his judgment. Alcohol affects the mind, so it can never be considered nutritious food.
Learn more about alcohol, here:
https://brainly.com/question/28448244
#SPJ5
8. The size and shape of an object are some of its....
Answer:
Characteristics...
Explanation:
I hope that's right, if not super sorry. I'm not the smartest. I tried my best if it's wrong
Which structure captures and stores the sun’s energy in plant cells?
Answer:
Chloroplasts
Explanation:
They capture light energy from the sun and use it with water and carbon dioxide to make food (sugar) for the plant. Which stores the sun's energy in plant cells.
Hope this helped!
Have a supercalifragilisticexpialidocious day!
Answer:
Chloroplasts
Explanation:
Chloroplasts capture light energy from the sun to produce the free energy stored in ATP and NADPH through a process called photosynthesis. Chloroplasts are one of the many unique organelles in the body, and are generally considered to have originated as endosymbiotic cyanobacteria.