Answer:
Is their a picture with the question?
Explanation:
What is the percentage of nitrogen, by mass, in calcium nitrate?.
Answer:
Nitrogen = 17.07%
Explanation:
We are asked to calculate the percentage by mass of nitrogen in Ca(NO3)2.
The molar mass of calcium nitrate is 164,088 g/mol.
In this 164.088 g/mol there are 2 nitrogen atoms.
Molar mass of nitrogen = 14,0067 g/mol
% Nitrogen = molar mass of N/total molar mass of the compound
% Nitrogen =[(2 x 14.0067)/164.088]*100
% Nitrogen = 17.07%
Please mark me as brainliest if you found this answer helpful
Which of the following equations is balanced?
Select one:
a. A
b. B
c. C
d. D
Answer:
c
Explanation:
4fe and 6o2 in both sides of C but in other their isnot proper balancing
Answer:
C
4fe4
6O6 so iron and oxygen is balanced
How many formula units are in 3.25 moles of (NH4)2SO4
Answer:
Three formula units, Two Ammonium radical and Sulphate radical
Explanation:
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Is water wet?
Seriously
Answer:
no its moist
Explanation:
Answer:
I say yes but my friends tell me that it's not because it makes things wet henceforth is not able to be "wet"
Explanation:
it is definitely wet though.
Hope this helps! :)
There is always some between any surfaces that are in contact with each other
Answer:
Friction that is the answer pls brainlist me
What is a trait and where does an organism get its traits from?
Answer:
A trait is a quality of someone got like art and organisms get their traits from DNA.
A 7. 298 g sample of copper reacts completely with oxygen, forming a copper oxide. The final mass of the copper oxide is 8. 217 g. What is the formula of the copper oxide?.
The formula of the copper oxide would be [tex]Cu_2O[/tex]
Chemical formulaMass of copper sample = 7.298 g
Mass of final product after reacting with oxygen = 8.217
Mass of oxygen = 8.217 - 7.298
= 0.919 g
Mole ratios
Cu = 7.298/63.546
= 0.115
O = 0.919/16
= 0.057
Cu = 0.115/0.057
= 2
O = 0.057/0.057
= 1
Thus, the formula for the copper oxide will be [tex]Cu_2O[/tex]
More on chemical formula can be found here: https://brainly.com/question/21272841
Which of the following models would best represent the inner and outer core of Earth, based on physical characteristics of each layer?
Answer:
No picture :(
Explanation:
There is no picture but if you see a picture wiith a light colored innner core with an orange outer core. thats the one. if you need anymore information just say it :)
_______ marshes are the most diverse.
Answer:Freshwater marshes are the most diverse
Explanation:
Answer:
freshwater
i got it right on my test
Hope This Helps :D
convert 5 mole(s) of Xe into molecules
Answer:
5 mol Xe × 6.02×10^23
------------ ----------------
1 1 mol Xe
3.01x10^24
I would calculate on your calculator to make sure
can someone help me ??????????????????????????????????????????
Answer:
Lithium-7
Explanation:
By carefully inspecting the diagram we can see three different sub-particles.
1) Electrons (-vely charged, outside the nucleus)
2) Protons (+vely charged, Inside nucleus)
3) Neutrons (uncharged, Inside nucleus)
Mass Number:
Mass number is the number of protons and neutrons present in the nucleus of an atom.
Therefore, in our problem there are 4 neutrons and 3 protons.
So, the mass number is 7.
Atomic Number:
Atomic number is the number of protons present in the nucleus. This number shows the identity of an atom. If you go through the periodic table you will find that the atomic number 3 is for Lithium.
Result:
Lithium-7
If the brine contains 250 g of NaCl, how many moles of Cl2 can be produced?
n/ student/teerdządg
Practice 6
The molecules represented in the diagram below can interact to cause a
biochemical process to occur.
Molecule A and molecule B most likely represent
A) a nerve signal and a gene
Molecule A
Molecule B
B
a receptor and a hormone
C) a chromosome and an antigen
D) a starch and an amino acid
Students, draw anywhere on this slide!
Answer:
B
Explanation:
Elements are made up of one type of atom. Compounds are particles that have more than one atom joined together. They can be ........ or ......
Answer:
metal or non metal
Explanation:
this is the answer
the checkmarks on thus picture indicating the __________________ factors of an ecosystem
A)Aboiotic
B) biotic
Answer:
We need the picture to answer the question
Explanation:
but i did do this test and number 4 was biotic and number 5 was abotic hope this helped
The temperature of a freezer started at 18şc. After cooling for a few hours, the freezer had a temperature of –12şc. What is the difference between the new, colder temperature and the original temperature?.
Explain why air is not a good conductor of heat
Answer:
Because its molecules aren't in direct contact with eachother.
PLEASE HELPPPPPPPPPPP
equilibrium and stability quick check
1. a system is at equilibrium. which statement is correct?
a. The rate of the forward reaction equals the rate of the reverse reaction.
b. The system has been disturbed.
c. there are no changes to the system.
d. The concentration of the reactants equal the concentrations of the product.
The concentration of the reactants equal the concentrations of the product.
At equilibrium the reaction neither moves forward nor backwardSo concentration remains constant.In the chemical equilibrium, the system has no observable changes. It is the state of the equal concentration state of the reactant and the products.
What happens in the chemical equilibrium?It is the dynamic state of the reaction in which the concentration of the chemical reactants and the products of the reaction are in a constant state and the amount does not change.
The chemical reaction does not move forward or backwards unless a disturbing or stressed condition is given to the system.
Therefore, option d. the concentration of the reactants and the products are equal.
Learn more about equilibrium here:
https://brainly.com/question/4289021
In honor of the scientist who worked on the mole concept,6.02x10^23 is also called?
Answer:
Avogadro's Number
Explanation:
6.02 x 10²³ is the number of units it 1 mole.
6.02 x 10 ²³ is known as Avogadro's number
a sample of (NH4)2SO4 contains 0.750 mole. what is the mass of the sample
Given the reaction: C3H8 + 5O2 = 3CO2 + 4H2O What is the total number of liters of CO2 produced when 150 liters of O2 reacts completely with C3H8?
what is conduction,convection,and radiation in science brainiest nice and great answer report wrong answer
Which graph most likely represents a rabbit population that found a new, larger habitat, but then eventually experienced an increase in predation?
Graph A
Graph B
Graph C
Graph D
Answer:c
Explanation:
It appears, in the society shown in the film, that one could have a potential romantic partner/love interest sequenced. Discuss the positive and negative aspects of having this technology available to prospective mates.
is based on GATTACA
This involves lavishing someone with attention, gifts, etc as a result of love and affection being experienced between the individuals.
The film which depicts it however has a positive and negative effect which is mentioned above.
Read more about Romance here https://brainly.com/question/25652231
A student places a small amount of water in a glass dish and then carefully places a small paperclip on the surface of the water. The paperclip floats. What happens if the student adds a drop or two of dish soap to the water? Check all that apply. The paperclip falls through the water to the bottom of the dish. The soap acts as a surfactant. The soap increases the surface tension of the water. The soap decreases the surface tension of the water.
When soap is added then the paper clip will fall as soap is a surfactant and decreases the surface pressure. The surface strain of water holds the paper.
What is the mechanism of floatation?The paper clip is lighter in weight and floats on the water surface as the density and mass play a major role in floatation. Any addition of substances like soap will lead the clip to fall or sink.
The addition of the soap lessens the pressure of the water surface as it is a surfactant and will affect the surface strain of water.
Therefore, when soap is added, paper clips will fall.
Learn more about surfactants here:
https://brainly.com/question/11752340
Answer:
1-The paperclip falls through the water to the bottom of the dish.
2-The soap acts as a surfactant.
4-The soap decreases the surface tension of the water.
Explanation:
edge 2022 :)
a named metal or non metal tent pole
Answer:
non metal, it is made out of aluminum
Explanation:
How can you tell the difference between a rock and a mineral?
Answer:
Explanation:
a mineral would have other elemts in its mixture where as a rock would be more simple, the mineral if were to have a metalic element in it would attract magnets to it making it magnetic
Silicate minerals are subdivided into six groups based on the way silica tetrahedra are.
Answer:
The linking together of silica tetrahedra into chains that do not easily move
Explanation:
Answer:
arranged and bonded
Explanation:
silicate minerals are subdivided into six groups based on the way silica tetrahedra are arranged and bonded
Which orbital diagram represents
helium (atomic number = 2)?
Answer:
its B
Explanation:
right on acellus
solve this questions please
Answer:
A
Explanation:
A solid that dissolves in water produce alkaline solutions
ex. sodium reacts with water to form sodium hydroxide – caustic soda