Potassium iodide can be decomposed by electrolysis (an electric current) into the elements potassium and iodine. Based on this information, how would potassium iodide be classified?
compound
heterogeneous mixture
homogeneous mixture
solution
Answer:
compound
Explanation:
Potassium iodide is a compound from the description given. The components of the compound is made up of elements and can only be broken down by chemical means.
A compound is a substance composed of two or more kinds of atoms or elements joined together in a definite grouping. The properties of the compound are distinct and different from those of the individual elements that are combined in its make - up.When compounds are broken down they are made up of elements.
The nuclear symbol for uranium-235 should be written as
o U-235.
233
92 U
235
143 U
OU
Answer:
²³⁵₉₂U
Explanation:
The nuclear symbol of the nuclei is ²³⁵₉₂U.
The uranium nuclei has;
mass number = 235
atomic number = 92
To write the structure of the atom;
The subscript before the symbol of the atom is the atomic number
The superscript is the mass number
So;
²³⁵₉₂U is the symbol of the nuclei.
If an object has a 30 kg mass on Earth, what would be it's approximate weight on Earth?
Answer:
If something were to weigh 30 kgs on Earth, they would also weigh around 66 pounds on Earth.
Explanation:
1 pound = 2.20462 kilograms.
Next, multiply 2.20462 and 30 and you should get 66.1386, or 66 pounds.
If the Earth rotated in the opposite direction, what would most likely occur? Select one
A.The Sun would rise in the west.
B.There would be more days in each year.
C.The phases of the Moon would last longer.
D. The seasons would be reversed.
Answer:
I believe the seasons would be reversed
Explanation:
If I'm wrong sorry
Answer:
D.) The seasons would be reversed
Explanation:
Hope I helped
When is national chocolate milkshake day?
Which diver do you think will make the biggest splash?explain
Answer:
A
Explanation:
hes higher up so the gravity is his advantage.
Calculate the volume of a sample of aluminum that has a mass of 3.057 kg. The density of aluminum is 2.70 g/cm3 (taking into consideration the rounded to three significant figures)
Answer:
v = 1130 cm³
Explanation:
Given data:
Volume of sample = ?
Mass of Al sample = 3.057 Kg (3.057 Kg× 1000g/1 Kg = 3057g)
Density of Al sample = 2.70 g/cm³
Solution:
Formula:
d = m/v
d = density
m = mass
v= volume
by putting values
2.70 g/cm³ = 3057g /v
v = 3057g /2.70 g/cm³
v = 1130 cm³
How many protons, electrons, and neutrons does an atom with atomic number 50 and mass number 120 contain?
The study of chemicals and bonds is called chemistry.
The correct answer is 50, 50, and 70.
In an element, there are the following things:-
ElectronsProtonsNeutronsIn elements, the number of protons and electrons are the same. hence, the number of electrons and protons in an element is 50.
The neutrons are defined as the proton minus mass number. Hence, the number of neutrons is 120-50=70
Hence, the answer is 50, 50, and 70
For more information, refer to the link:-
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How many atoms are in 2 grams of Radon (Rn)?
Answer:
i do not uterstand
Explanation:
what is the role of electric current in electrolysis
Answer:
Electrolysis, process by which electric current is passed through a substance to effect a chemical change. ... Electric current (i.e., electrons) enters through the negatively charged electrode (cathode); components of the solution travel to this electrode, combine with the electrons, and are transformed (reduced)
how do I ask a girl I like to go out with me I need a woman's opinion
Answer:
Don't just walk up to a person you think is cute and ask them out. Start with small talk and gauge common interests. “See how they respond,” Overstreet says. “For example, if you approach someone and they don't reply, are short with you, or move further away, then move on.
Explanation:
Carbon powder and iron fillings are both black powders. When mixed together they look like one black powder. Which of these would be best to use to seperate the iron fillings from the carbon powder. A. a magnifying glass B. heat C. a magnet D. water
Answer:
C
Explanation:
The iron filings will be attracted to the magnet and will separate from the carbon powder.
The best method to be used to separate the iron fillings from the carbon powder is through the use of water.
The separation of carbon powder and iron fillings in powdered form can be achieved in a blast furnace flue dust. The blast furnace flue dust is usually combined with water to create a slurry that contains (50-70)% solids.
The slurry is fortified with a flotation agent as well as a frothing agent. The content in the slurry is stirred rapidly to cover the carbon particles completely with the flotation agent.
The carbon powdered particles float on top of the slurry, while the iron fillings are collected as a sink product.
Learn more about separating methods here:
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6
If the popcorn is not used it is either discarded or what? (Imin, 35se
Used to make roads
Used to make animal Feed
Used to make Erasers
Answer:
Used to make animal Feed
Explanation:
Which of the following statements is true? Sound waves create areas of high and low pressure, Areas of high pressure are called compressions. Areas of low pressure are called rarefactions. All of the above. .
Answer:
all i think
Explanation:
Is it good to help a pregnant girl raise a baby?
Answer:
Yea fs
Explanation:
What structures are part of the body's first line of defense against pathogens
Answer:
It would be the innate immune system or just the immune system
Explanation:
:)
What is structure 1, and how does it help sustain life
Answer:Chloroplast
Explanation:
Answer:
D
Explanation:
Chloroplast
According to Newton's 2nd Law of Motion, what will happen to acceleration if force remains the same but mass increases
While making chicken soup for his family one evening, Luis added the amount of salt the recipe called for. After tasting the soup, he decided the seasoning was correct. He then he let the chicken soup simmer for two hours to blend the flavors. But when he served the soup, it was too salty. What happened to the soup to make it so salty?
Answer:
the soup become too salty through the process of osmosis
He then split the list of elements into several columns so that elements beside each other had similar ?
The columns into which the elements were split are called groups and the elements in the same group display similar properties.
What is a group?A group refers to elements that have similar chemical properties and occur in the same column in the periodic table.
Hence, the columns into which the elements were split are called groups and the elements in the same group display similar properties.
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Which of the following is an example of a zoonotic bacterial disease?
O Anthrax
O Foot and Mouth Disease
O Chronic Wasting Disease
O Kuru
Answer:
I think it is Anthrax. You are welcome
this is for petadrea
Answer:
thanks
Explanation:
Since the amount of yeast stays the SAME, it is considered to be a?
A. Variable
B. Constant
Which two body systems are most important in breaking down food and distributing nutrients throughout the body?
Answer:
hope you like and pls follow me
Explanation:
digestive and circulatory system are most important in breaking down food and distributing nutrients throughout the body.
Which two statements explain ways in which cells get nutrients?
A. Transport proteins help molecules cross cell membranes.
B. A chloroplast converts energy from sunlight into organic matter.
I C. The nucleus provides the instructions for making proteins from
amino acids.
D. Mitochondria change energy stored in organic compounds into a
usable form.
help plz
Answer: B and D
Explanation:
Just did the test and these make the most sense
A chloroplast converts energy from sunlight into organic matter.
Mitochondria change energy stored in organic compounds into a
usable form. the two statements are ways in which cells get nutrients.
Proteins embedded in the cellular membrane act as ushers. They help carry nutrients from the bloodstream into the cell. Glucose, amino acids, fats, and vitamins use carrier proteins to get inside cells.Onice through the membrane, nutrients play many important roles. Some cells, like muscle fibers, need minerals like calcium to flood the cell to move your arms and legs. Others, like nerve cells, need sodium and potassium to be pumped in and out so your brain can pick up sensory information.Cells use the glucose in your bloodstream to create energy by making ATP, the cellular energy currency. And amino acids are the building blocks for all DNA. When they’re brought into the cell, amino acids help transfer genetic information so cells can replicate.Learn more about cells get nutrients
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What is the concept of Absolute Zero
Answer:
Absolute zero, technically known as zero kelvins, equals −273.15 degrees Celsius, or -459.67 Fahrenheit, and marks the spot on the thermometer where a system reaches its lowest possible energy, or thermal motion. There's a catch, though: absolute zero is impossible to reach.
Explanation:
Good luck!!
Whats the longest word in history?
Answer:
Pneumonoultramicroscopicsilicovolcanoconiosis
Explanation:
Which of these expressions are correct variations of the Combined Gas Law?
Answer:
Both
Explanation:
The combined gas law is also known as the general gas law.
From the ideal gas law we assume that n = 1;
So;
PV = nRT
and then;
[tex]\frac{P_{1}V_{1} }{T_{1} }[/tex] = [tex]\frac{P_{2}V_{2} }{T_{2} }[/tex]
If we cross multiply;
P₁V₁T₂ = P₂V₂T₁
So;
T₁ = [tex]T_{2} \frac{P_{1}V_{1} }{P_{2} V_{2} }[/tex]
Also;
V₂ = [tex]V_{1} \frac{P_{1} T_{2} }{P_{2} T_{1} }[/tex]
So from the choices both are correct
How many moles make up 5.7491x1025 molecules of Dinitrogen pentoxide (N2O5)?
Answer: ??? moles N2O5 (round to 3 sig figs)
Answer:
95.5 molesExplanation:
To find the number of moles in a substance given it's number of entities we use the formula
[tex]n = \frac{N}{L} \\[/tex]
where n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
From the question we have
[tex]n = \frac{5.7491 \times {10}^{25} }{6.02 \times {10}^{23} } \\ [/tex]
We have the final answer as
95.5 moles to 3 sig. figuresHope this helps you
In an oxidation-reduction reaction, oxidation is what happens when a reactant
loses electrons
. Reduction occurs when a reactant
gains electrons
in the reaction.
