Explanation:
By Graham's Law,
We have r1/r2 = √(M2/M1), where M represents the molar mass of the gas and r is the effusion rate.
Since temperature is not a variable here, the sentence is true.
Why can't krypton and xenon separate during the separation of gases in the air?
Answer:
The remaining gas is a mixture of argon, neon, krypton, and xenon. Because these elements are chemically very unreactive, chemical means cannot be used to separate them.
Explanation:
Answer:
They're in Group 0 as they have full outer shells meaning they are chemically unreactive as they already have full outer shells meaning they don't want to lose or gain any electrons. Thus, they can't separate during the separation of gases in the air.
Type the correct answer in each box.
Complete the chemical formula for each ionic compound. Consult the periodic table to help you answer the question.
magnesium nitride: Mg___N___
calcium chloride: CaCl____
Answer:
mg3n2 and cacl3 hope it helps
Which is a characteristic of diatoms?
whip-like tail
heterotrophic
multicellular
glass-like cell wall
Answer:
Glass-like cell wall
Explanation:
No tail, autotrophs, and single-cellular. Cell walls are transparent, do D is correct.
Answer:
glass-like cell wall, the guy above is right
Explanation:
took the test :)
How many atoms of titanium are in 0.085 mol of titanium
Answer:
5.12x10^23 atoms
Explanation:
To find atoms, you need to use Avogadro's number. Here is the equation:
0.085 mol x 6.022x10^23 atoms = 5.12x10^22 atoms of titanium
Keep in mind that units need to cancel and make sure to double check those sig figs!
is the measure of this flow? its for thermal energy transfer interactive
Which of the following elements does not form a diatomic molecule?
A. Chlorine.
B. Nitrogen.
C. Neon.
D. Hydrogen.
Answer:
C
Explanation:
Neon is a noble gas, which is monoatomic.
Zn + 2HCl → ZnCl2 + H2
What is the half reaction for the reduction of hydrogen in the reaction?
Answer:
2H^+ +2e -> h2(g)
Explanation:
Since hydrogen is reduced, look for a decrease in oxidation number and the gain of electrons.
Answer:
ZnCl2 + H2
Explanation:
got it correct!
35 Before the discovery of oxygen some scientists had a different theory about burning.
What did they believe was present in all substances that burned?
A air
B hydrogen
C phlogiston
D reactivity
Answer:
B i have to search it like 23 hours to find it but Thank you for sharing your question :)The reaction represented by this graph is an exothermic reaction. According to the graph, which statement is true? Reactants have more energy than products. Products have more energy than reactants. Reactants and products have the same amount of energy.
Answer:
Reactants have more energy than products
Explanation:
Generally, in an exothermic reaction heat is released. In other words, energy is released. So you start with reactants which have a set amount of stored chemical energy, and you lose some in the reaction. Since energy is 'leaving', the stored chemical energy in the products is less than what we started with in the reactants. When given a graph, you can tell this is true because going from left to right, the line representing the stored chemical energy will start at a higher level than where it ends.
The true statement about an exothermic reaction is that reactants have more energy than products.
What is an exothermic reaction?An exothermic reaction is one in which the energy of reactants is greater than that of products. As such, energy is given off during the reaction in form of heat.
Thus, the true statement about an exothermic reaction is that reactants have more energy than products.
Learn more about exothermic reaction:https://brainly.com/question/10373907?
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HELP IM BEING TIMED
What type of weather can Georgia expect in the next 12 hours?
A light rain or drizzle
B heavy precipitation or thunderstorms
C many days of rain, snow, or fog
D sunny, clear, and windy
Answer: I think it's B
Help me, I’m bad a science.
Answer:
Removing the worms is they first key to overcoming this problem. Thus you should ensure that the worms have not spread throughout the house/facility, or caused more damage.
Secondly, you should replace the pipes taht the worms got into, or clean them at most. If it’s simply worm droppings then just clean it, but if it’s more and worse than that alike slime then it is best to remove and replace it.
the only way the worms escaping could affect something is if they decontaminated it, or alas ate or destroyed it. Other than that if they died you could simply replace them, but e things cannot be replaced
Explanation:
You didn’t actually tell us any details so that the best I got from that
can I have brainlest pwease?
What are some signs that a chemical change has occurred?
Answer:
Color Change.
Production of an odor.
Change of Temperature.
Evolution of a gas (formation of bubbles)
THe Precipitate (formation of a solid)
Explanation:
Explain how force can be manipulated so objects with
different masses can fall at the same speed.
(Please help!)
Janice wants to grow flowers in her backyard. She has four types of dirt that she could use, but she is unsure of which type would allow the flowers to grow the best. In order to figure this out, she sets up an investigation. Janice puts each type of soil in a different pot and plants a flower in each pot. What scientific question should Janice ask from her experiment?
A.
Which soil looks the best?
B.
Which soil type allows the flower to grow the most?
C.
Which soil is the oldest?
D.
Which soil type is preferred by most people?
Answer:
B
Explanation:
She is unsure of which soil would allow the flowers to grow best so the soil that allows the flower to grow the most is the best soil.
Answer:
B. which soil type allows the flower to grow the most?
find the name for this W(C2H3O2)4
The name for this W(C2H3O2)4 is the chemical formula for lead(IV) acetate, often known as lead tetraacetate, is Pb(C2H3O2)4.
What is chemical formula?Chemical formula is defined as any of a number of ways to describe the structure or content of chemical substances. The chemical formula is a way of expressing information about the atomic proportions that make up a certain chemical compound or molecule using the numbers and symbols of the chemical elements. The sorts of atoms and their numbers in a molecule or compound are described using chemical formulae. Each element's atoms are denoted by one or two distinct letters.
It is not a salt because it is a colorless solid that dissolves in nonpolar, organic liquids. Moisture causes it to break down, therefore acetic acid is usually added when storing it. The substance is utilized to create organic compounds.
Thus, the name for this W(C2H3O2)4 is the chemical formula for lead(IV) acetate, often known as lead tetraacetate, is Pb(C2H3O2)4.
To learn more about chemical formula, refer to the link below:
https://brainly.com/question/11995171
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The diagram shows a vertical number line. A vertical line with arrowheads at both ends has tick marks every 4 units with the tick marks for negative 4, 0, 8 labeled. The tick mark two past 8 has an X next to it. What is the position of point X? –16 –12 12 16
Answer:
16
Explanation:
Answer:
its 16
Explanation:
i took the quiz and it was right
The pressure inside of a tire is measured as
3.2 atm. What is this pressure in psi? Explain
the steps that you took to solve this problem.
Answer:
Aksjisssjsjszjsusshisbzjsvssjsh
This equation represents cellular respiration.
C6H12O6 +602
6 CO2 + 6H2O + energy
Which table lists all the atoms in reactants and products of cellular respiration?
Reactants 6 C 12 H 18 O
ΟΑ.
Products 6 C 12 H 18 O
Reactants 6 C 6H 2
Ов.
Products 6 C 12 H 120
Reactants 6 C 12 H 120
C.
Products 6 C 12 H 30
Reactants 6 C 12 H 18 0
D.
Products 1C6H 18 O
Please hurry
if you work it put you will get the 3rd one I think
Select the correct answer.
The elements beryllium, calcium, and strontium are all in group 2. What is the correct relationship of these elements regarding their ionization energy?
A.
Ca < Be < Sr
B.
Sr < Be < Ca
C.
Be < Ca < Sr
D.
Sr < Ca < Be
E.
Ca < Sr < Be
Answer:
d. The correct answer for your questions is Sr<Ca<Be
Answer:
Answer:- choice d is correct. Sr<Ca<Be .
Explanations:- Br, Ca, and Sr are all elements of same group as they all have 2 valence electrons. As we move down in a group, a new shell is being added that increases the size of the atom. As the size of an atom increases, it is easy to remove the electron from it's outer most shell in it's gaseous state. Since, Be is above Ca and Ca is above Sr. The size increases in the order, Be < Ca < Sr. It means Be is the smallest one of them and so it's hard to remove from it's outer most shell and hence it's ionization energy is higher.
Sr is largest one in these three elements and so it's easy to remove outer most electron from it that means the ionization energy is least. Ca is between Be and Sr.
So, an increasing order of ionization energy is Sr<Ca<Be . Choice D is correct.
You have 1.6 x10 21 atoms of oxygen, what is the mass of that number of atoms
Answer: 166.023×1023
Explanation:
Mass of 6.023×1023 atoms of oxygen = gram atomic mass of oxygen.
Mass of 6.023×1023 atoms of oxygen = 16g
∴ Mass of 1 atom of oxygen =166.023×1023
If there are 20.0g of KOH available, how many grams Ca(OH)2 will form?
I got a weird answer, so can someone explain?
Answer:
can u send the qsn 4rm the start so tt I can help
Which property is typical of a covalent compound?
A.
They are extremely hard solids.
B.
They have low melting and boiling points.
C.
They conduct electricity.
D.
They have rigid crystal structures.
E.
They exist only as gases and liquids.
Answer:
low m.p and b.p
Explanation:
hope u like the ans
Answer:
The property that covalent compound is they have low melting and boiling points
Reptiles, birds, and mammals reproduce by what type of
fertilization?
The correct answer is Internal
Internal Fertilization
Describe the error (what rule does it violate) if there is one in each of the following:
Answer:
prolly the gay one
Explanation:
How many oxygen (O) atoms are in a molecule of C3H403?
O A. 1
O B. 10
O c. 4
O D. 3
Answer:
your answer is 3
Explanation:
Answer:
D
Explanation:
"O3" means there are three atoms of that particle element in the substance.
What are the number of atoms in chromium
Answer: The correct answer is 24
Explanation:
Which term describes rocks that absorb water?
A ductile
B malleable
C porous
D streamlined
Answer:
C. porous
hope it helps!!!
please mark as the brainliest if it is correct!
How is the polar vortex different from the jet stream?
When a gas is heated, the gas particles have more kinetic energy. Complete the following sentence: This means they move about more and have more ______ with the sides of the container. This increases the pressure.
Answer:
Contact
Explanation:
As the particles heat up, they move around more, resulting in them hitting the sides of the container more.
Calculate the formula mass for Cr(C2H302) show work
Answer:
The mass of Cr(C2H302) is 229.122 grams
