Answer:
Is used to predict the spectra of hydrogen and hydrogen like species
Explanation:
The Bohr's model of the atom was propounded by Neis Bohr. In his theory, an atom is composed of quantized energy levels in which electrons may be found.
The transition of an electron between energy levels leads to the absorption or emission of energy in the form of a photon of visible light. The energy absorbed or emitted depends on the energy difference between the two energy levels.
The model is successful at predicting the electronic spectra of one electron species but totally fails when the specie has more than one electron. Also, the model fails to show the true shape of the electron orbitals within an atom.
37 grams of H3PO4 ????
Answer:
76 grams is the correct answer to this question
Can someone help with #6
Will mark brainliest too!
Answer:
okey brooooooooooooooo
no se ingles solo spanish
Explanation:
todoooooooooooooooooooooo bien bro
the first element was full brittle and did not conduct heat
Answer:
non-Metals
Explanation:
HELP ME.
Convert 2.5 grams of water into molecules of water.
Answer:
1.5×1024 molecules
Good luck!
48g of methane was burned in an excess of air. What mass of carbon dioxide would be produced in the reaction assuming complete combustion? Use the information below to answer the question.
Answer:
132g
Explanation:
CH4= 12+4=16
moles= m/Mr moles=48/16=3 mol
CO2= Mr=44
there are the same number of moles as methane:
Mass= Mrxmoles
44x3=132g
The mass of the carbon dioxide produced by the combustion of the 48 g of methane is equal to 132 g.
What is the combustion reaction?Combustion reaction involves the complete oxidation of the hydrocarbon such reactions generally release only carbon dioxide and water as products.
A hydrocarbon undergoes combustion to produce carbon dioxide and water as the product. No other side products are formed in the combustion reaction.
The given combustion reaction of the methane can be written as follows:
CH₄ + 2 O₂ → CO₂ + 2H₂O
Given the amount of methane for combustion = 48 g
The molar mass of methane = 16g/mol
The molar mass of the carbon dioxide, CO₂ = 44g/mol
16 grams of methane produce carbon dioxide = 44g
The 48 grams of methane will produce CO₂ = (44/16) ×48 = 132 g
Therefore, the mass of 132 g of carbon dioxide is produced by the combustion of 48g of methane.
Learn more about combustion reactions, here:
brainly.com/question/12172040
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What is the electron configuration for an Atom that has 13 electrons
The shade or pigment of a mineral is known as
Luster
Hardness
Density
Streak
O Color
Answer:
Streak
Explanation:
The streak of a mineral is the color of the powder produced when it is dragged across an un-weathered surface.
responsible for bring messages from the sensory
organs to the brain. ?
A: Skeletal
B: Sensory
C: Motor
D: Axial
Answer:
motor nerves
Explanation:
sensory produces while motor transports
PLEASE HELP WILL MARK BRAINLY
1. If a cube has 2cm sides and a mass of 10 g, what would it's density be?
A. 0.8 g/cm3
B. 1.25 kg
C. 1.25g/cm3
D. None of the above
2.If a cube has sides of 1.5 cm, and a mass of 15 g, would it float or sink in water?
A. float
B. Sink
3. A material with a melting point of 25C would be a solid at 15C?
A. True
B. False
4. A material with a Chemical Symbol of CO is an element.
A. True
B. False
Answer:magine 2 cubes. ... One cube is made out of gold and has a mass of 19.3 grams. ... Gold has a density of 19.3 grams per cubic centimeter, that is, 19.3 g/cm3 or 19.3 g cm-3 ... If you weigh 1.00 mL of liquid water it will have a mass of about 1 g so its ... They are both less dense than water so they will also float on top of water .
Explanation:
Which of the following is an example of a chemical element a. Salt B.water c.sugar d.sodium
Answer:
the answer is sodium
Explanation:
hope this helps
1 point
If the element Lithium (Li) were to bond with the element Sulfur (s), what
type of bond can you predict will be formed and why?*
A. Covalent-Li and S are two nonmetals
B. Covalent-Li is a metal and S is a nonmetal
C. Ionic-Li and S are two nonmetals
D. Ionic-Li is a metal and S is a nonmetal
Answer:
C. Ionic-Li and S are two nonmetals
Explain the function of the nucleus, nucleolus, nuclear membrane, chromosomes, ribosomes, cytoplasm, cell membrane, mitochondria, Golgi complex, vacuole, endoplasmic reticulum, cell wall, chloroplast
What information is needed to determine a molecular formula
Answer:
Empirical formulas can be determined from the percent composition of a compound. In order to determine its molecular formula, it is necessary to know the molar mass of the compound. Chemists use an instrument called a mass spectrometer to determine the molar mass of compounds.
Answer:
The empirical formula and the molar mass.
Explanation:
AP3X
2. What is the molarity of a CuBr2 solution that contains 446 g of solute in 5000 mL of solution?
Answer:
0.4 M
Explanation:
M=moles/Liters
Convert grams to moles (446/223.37=1.99668711)
Convert 5000 mL to liters (5000/1000)
Plug in the values and solve
M=2/5
M=0.4
What is the relationship of rocks to minerals.
Rocks are minerals.
Minerals are rocks
Minerals are in rocks.
Rocks are in minerals.
Minerals are in rocks.
Select the correct answer.
What is the chemical name of the compound Ti2O3? Use the list of polyatomic ions and the periodic table to help you answer.
A.
titanium oxide
B.
titanium(II) oxide
C.
titanium(III) oxide
D.
titanium trioxide
Answer:
titanium(III) oxide is the name of Ti2O3
A student built a simple fan using an electromagnet, a permanent magnet, and a fan blade. When she connects the electromagnet to one battery, the fan blade turns. What would most likely happen if she connected it to two batteries?
The fan blade would turn faster.
The fan blade would turn slower.
The fan blade would not turn at all.
The fan blade would turn in opposite direction.
Answer:
The fan blade would turn faster
Explanation:
The speed of chemical weathering depends on:
water freezing
amount of wind
soil depth
Answer:
Its soil depth
Explanation:
Elements that have some properties of metals and some properties of nonmetals
Answer:
metalloids aka semimetals
Explanation:
What is white light made up of?
A. infrared light
B. ultraviolet light
C. seven colors of the rainbow
Answer:
The answer is C
Explanation:
hope this helps
:)
Answer:
C. Seven colors of the rainbow
Explanation:
when light enters a water droplet and then leaves it again, each different wavelength of light refracts at a slightly different angle. then, when the light is broken up, you can see all of the colors of the rainbow.
For Example, A Dark Tinted Window.
plzzzzzzzzzz help ASAP
Answer:
i think the answer is c because it says that is all they care
CHAPTER
CHAPTER ASSESSMENT
Understanding Main Ideas (Part A)
In the space at the left, write true if the statement is true; if the statement is false,
change the italicized term to make it true.
1. The overall charge of a formula unit for a compound is never zero.
2. In a crystal lattice, each positive ion is surrounded by negative ions.
3. Delocalized valence electrons are typical of ionic compounds.
4. A sulfate ion contains fewer oxygen atoms than a sulfite ion does.
true
5. Metals tend to be malleable and ductile and to have relatively high
melting points.
6. The more negative the lattice energy is, the stronger is the force of
attraction between the ions of an ionic compound.
7. In naming ionic compounds, the cation is named first.
8. When a metal reacts with a nonmetal, the metal tends to gain electrons.
9. In naming a monatomic anion, the suffix -ide is used.
10. The prefix per- is used in naming the anion with the most oxygen atoms.
Answer:
The answer is in correct
Ca+Cl2-->CaCl2 Then, write balanced half-reactions describing the oxidation and reduction that happen in this reaction.
Answer:
Oxidation half
Ca -----> Ca2+ +2elecyrons
Reduction half
Cl2 + 2electrons ------> 2Cl-
Explanation:
The atoms in a sample are close together but can side past one another. As the atoms lose energy, they move slower. The atoms become locked in place because of attractive forces between them.
Which change of state is taking place
Gas to solid
Gas to liquid
Liquid to solid
Solid to liquid
Chemistry Cookie project
Answer:
What's the question?
Explanation:
Answer:
I dont understand, is there supposed to be a picture or question?
Explanation:
If 9.87g of As2O3 reacts with carbon, then 7.71g of As should be produced. If only 6.33g of As is actually produced, what is the percent yield of As?
a 82.1%
b 0.821%
c 64.1%
d 0.641 %
Answer:
A
Explanation:
Percent yield= Actual yield/Theoretical yield x 100
The problem tells you that 6.33g of As is produced (actual yield), but 7.71g should be produced (theoretical yield). So 6.33/7.71= 0.821 x 100= 82.1%
Answer:
82.1%
Explanation:
A. I got it right on my test
why do the properties of a material determine the use of the material?
Answer:
Matter is made up of particles whose properties determine the observable characteristics of matter and its reactivity.
Explanation:
Convert 4, 294 grams to pounds. Use the conversion factor 1 pound = 453.59 grams.
plzzzzzzzzzzzzz help me
Answer: omnivores
Explanation:
I just know
Fe(OH)2+HCI--> FeCl2+H2O balanced
Answer:
Fe(OH)2 + 2HCl ---> FeCl2 + 2H2O
I think