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What does the emission spectrum tell us about the structure of an atom?
Answer:
The emission spectrum of a chemical element or chemical compound is the spectrum of frequencies of electromagnetic radiation emitted due to an atom or molecule making a transition from a high energy state to a lower energy state. ...
Explanation:
Therefore, spectroscopy can be used to identify elements in matter of unknown composition.
Tres diferencias entre los líquidos y los sólidos
Answer: Density, Volume, Shape
why does pure water not conduct electricity in terms of bonding
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Positive and negative ions attract each other and combine with each other to yield ionic compounds and they are separated easily to conduct electricity.
The concentration of ions in pure water is very less and is almost unionised, thus does not conduct electricity.3. Which is the most molecule that has the greatest number of atoms? a) H2SO4 b) 2002 c) CH3CH2COOH d) HNO3
Answer:
HNO3 is the answer HNO3 is the answer
HELP!!!!! NO SPAM!!!!!!!!!!!!!!!!!
S + 6 HNO3 --> H2SO4 + 6 NO2 + 2 H2O
In the above equation how many moles of water can be made when 75 moles of HNO3 are consumed?
Let required moles be x
[tex]\\ \sf\longmapsto \dfrac{2}{6}=\dfrac{x}{75}[/tex]
[tex]\\ \sf\longmapsto \dfrac{1}{3}=\dfrac{x}{75}[/tex]
[tex]\\ \sf\longmapsto x=\dfrac{75}{3}[/tex]
[tex]\\ \sf\longmapsto x=25mol[/tex]
2moles of H2O are made when 6moles of HNO3 are consumed
75 mole of HNO3 produces = [tex]\frac{2}{6}[/tex]× 75 ⇒ 25 moles of water
Limiting Reagent MethodThe limiting reagent is the reactant that is completely used up in a reaction and thus determines when the reaction stops.
S + 6 HNO3 --> H2SO4 + 6 NO2 + 2 H2O
6 mole of HNO3 produces = 2 moles of H₂O
1 mole of HNO3 produces = [tex]\frac{2}{6}[/tex] mole of H₂O
∴ 75 mole of HNO3 produces = [tex]\frac{2}{6}[/tex]× 75 ⇒ 25 moles of water
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if equations are not balanced,what must you do?
If a chemical equation is not balanced it implies that either mass has been created or destroyed which is a contradiction to law of conversation of mass which states that matter can niether be created nor destroyed.
In order to balance the chemical equation, you need to make sure the number of atoms of each element on the reactant side is equal to the number of atoms of each element on the product side. In order make both sides equal, you will need to multiply the number of atoms in each element until both sides are equal.
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Which group have spore- dispersing vascular plants? *
2 points
Thallophytes
Pteridophytes
Bryophytes
Gymnosperms
Using the process of elimination and understanding:
Thallophytes- non-vasular ❌ Pteridophytes- vascular spore-dispersing plant ✅ Bryophytes - non-vascular spore-dispersing ❌ Gymnosperms - produce cones (coniferophytes) ❌Pteridophytes (ferns) and the group of spore-dispersing vascular plants.
Charlotte's car averages 25 miles per gallon of gas. How many dal would she need to travel 3,241 hm?
Answer:
Around 129 galons
Explanation:
if you divied 3,241 by 4 you get 129 gallons but if you times that by 25 you get 3,225 so a little bit off but close.
Joe has a disease that his cells can't convert food energy effectively into energy they can use. He gets extremely tired as a result. Which organelle is affected by Joe's disease?
Answer:
Mitochondrion
Explanation:
Joe's cells can't convert food energy effectively into energy they can
use. As a result, he gets extremely tired, has weak legs, and can't
breathe well. Joe swims every day to keep his body as strong as
possible. Which organelle is affected by Joes disease
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which describes any substance that shatters or breaks easily?
Answer:
Scientists describe any substance that shatters or breaks easily as being brittle.
Explanation:
Brainliest?
Ai là nhà Hoá học nổi tiếng nhất ở Việt Nam? Ông đã có những đóng góp gì cho xã hội?
Answer:
Are you spraking Vietnamese?
Why doesn't Florida have as many earthquakes as California? Use evidence from the map to support your response.
Answer:
Florida is tied for first place as having the fewest earthquakes of any US state. Because Florida is not located near any tectonic plate boundaries like california.
Explanation:
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Find the sum of the following measurements: reported correctly.
5.1 x 105 m + 5.22 x 105 m
Convert 0.000123 into scientific notation with the same number of sig figs. (Your answer should be in the format M x 10N U) (M is everything on the left. N is your exponent including a negative sign (if applicable) in front with no space between negative sign and exponent's number) (Examples: 2.5678 x 10-2 m, 2.5 x 105 m2) (you would type m2 for m2)
6.02 x [tex]10^{2}[/tex]
A solution with a (buffer or pH) of 7.0 is considered neutral.
Answer:
Correct
Explanation:
It means that there are an equal amount of hydroxyl and hydrogen ions, hence it is a neutral solution.
Why do solids maintain their volume and shape? cause-effect
A.) Because they vibrate
B.)because they are packet tight
C.) because they are crystalline
B.)because they are packet tight
Answer:
Because they are packet tight.
Explanation:
Solids maintain their volume and shape because they are packet tight.
A solid's particles fit closely together. The forces between the particles are so strong that the particles can not move freely; they can only vibrate. This causes a solid to be a stable, non-compressible shape with definite volume.The number of
in the nucleus of an atom is the
atomic
of that element. Because atoms are
electrically neutral, the number of protons and
in an atom are equal. The sum of the
and neutrons is the mass number.
What’s the correct order it goes in
Answer:
The number of protons in the nucleus of an atom is the atomic number of that element. Because atoms are electrically neutral, the number of protons and electrons in an atom are equal. The sum of the protons and neutrons is the mass number.
Write the formuler of the following organic compounds
1. 2-Methyl - 2-hyblroxy propane
2. 2-methylpropan-2-ol
3. Propanoic acid
4. Methyl ethanoate
5. Methyl Propanoate
6. 3-methylpeatane
7. 2-hydroxy panoic acid
Please help me asap
Answer:
All I know is these things hope they help u.
Which location below would be considered a microhabitat
Answer: An overturned decomposing log or the underside of a rock in a stream are excellent examples of microhabitats. Both a habitat and a microhabitat have typical abiotic (e.g. water, temperature, light.
Explanation:
A reaction that uses a catalyst:
Explanation:
In general, catalytic action is a chemical reaction between the catalyst and a reactant, forming chemical intermediates that are able to react more readily with each other or with another reactant, to form the desired end product.
I hope it's helpful!!
Nitrogen is also returned to the soil through animal _____.
wastes
habitats
gases
birth
Carbon can form large number of organic compounds why
Answer:
Carbon is the only element that can form so many different compounds because each carbon atom can form four chemical bonds to other atoms, and because the carbon atom is just the right, small size to fit in comfortably as parts of very large molecules.
-If sulfuric acid (H2SO4) reacts with 29 grams of sodium chloride (NaCl), how many grams of hydrochloric acid (HCl) are produced? H2SO4 + NaCl > HCl + Na2SO4
- In the same reaction, how much salt (NaCl) is needed to produce 4.0 moles of sodium sulfate (Na2SO4)?
- In the same reaction, if you started with 100 moles of sulfuric acid (H2SO4), how many moles of hydrochloric acid (HCl) could you produce?
Explanation:
mole = mass/molar mass
mole of Nacl = mass/mm
molar mass of Nacl = Na + Cl = 23+35=58
mole of NaCl = 29/58
mole of NaCl = 0.5mol
H2SO4 + NaCl ====> HCl + Na2SO4
1. 1. 1. 1
since mole of NaCl is 0.2mol then mole of HCl is also 0.2mol since they are all in the same ratio
mole of HCl = Mole of NaCl = 0.5mol
mass of HCl = ?
molar mass of HCl = H + Cl = 1+ 35=36
mole of HCl = mass /molar mass
0.5= mass/36
mass = 0.5×36 = 18 grams
What does mean when it asks for the smaller ion
Explanation:
mg2+ would be the smaller ion this is because each ion has the same number of electrons however mg2+ has a greater number of protons and therefore is more charge dense and the outer electrons feel a greater pull from the nucleus.
I hope it's helpful!!
Calcium Bicarbonate + Calcium Carbonate =?
Please help
Answer:Calcium bicarbonate, also called calcium hydrogen carbonate, has the chemical formula Ca(HCO3)2. The term does not refer to a known solid compound;
calcium bicarbonate = calcium carbonate + water + carbon dioxide
Explanation:
which element on the periodic table has the highest electronegativity
Answer:
fluorine
Explanation:
Electronegativity varies in a predictable way across the periodic table. Electronegativity increases from bottom to top in groups, and increases from left to right across periods. Thus, fluorine is the most electronegative element, while francium is one of the least electronegative
What is the Systematic Name of the Following Compound?
TiCl₂
Choose 1 Answer:
tin(II) chloride
titanium (I) chloride
titanium (II) chloride
tin(I) chloride
Answer:
titanium (I) chloride
Explanation:
Tin has a chemical formular of "Sn"
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The electronic structures of atoms X and Y are shown.
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X and Y form a covalent compound.
What is its formula?
A XY
B XY
C
XY
D XY
Answer:
Its formula is B) XY3,also known as ammonia,because X is hydrogen and Y is nitrogen.
So,yeah the answer is B
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The electronic structures of atoms X and Y are shown. X and Y form a covalent compound. The formula is XY₃. The correct option is B.
What are covalent bonds?Covalent bonds are the strongest bonds present between chemical elements. This bond is formed by sharing electrons between the elements.
Two atoms share electrons with each other and form bonds between them. They are the strongest because there is sharing of electrons between them.
There are five electrons present in the outer shell of the Y atom. There are two atoms more needed to complete the orbital of Y. There is one electron present in the X atom.
Those compounds that are formed by the covalent bond are the strongest compounds. So they are not easy to break them.
Thus, the correct option is B. XY₃.
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Find the number of protons, neutrons, and electrons for carbon-12, carbon-13, and carbon-14 respectively.
Answer:
A neutral atom of Carbon-12 contains six protons, six neutrons, and six electrons; therefore, it has a mass number of 12 (six protons plus six neutrons).
Carbon-13 (13C) is a natural, stable isotope of carbon with a nucleus containing six protons and seven neutrons and six electrons.
Neutral carbon-14 contains six protons, eight neutrons, and six electrons; its mass number is 14 (six protons plus eight neutrons).
Hope this helps! =D
The number of electrons, protons and neutrons in carbon -12 are all 6 and in carbon-13 they are 6, 6, and 7 respectively and in carbon-14 it is 6, 6,and 8 .
What are isotopes ?Isotopes are atoms of same element with different mass numbers. Isotopes slightly differ in physical and chemical properties also. Most of the element in periodic table have isotopes however, not all of them are stable and abundant.
The number electrons and protons in a neutral atom is equal. Mass number of an atom is the sum of number of protons and neutrons. In carbon -12, the number of electrons and protons and neutrons is 6 and the number of neutrons in carbon -13 is 7.
The number of electrons and protons is 6 and that of carbon- 14 is 7. Therefore, all these isotopes are having same atomic number but differ in neutrons numbers.
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how many atoms does calcium have?
Answer: 20
Explanation: For example, all calcium atoms have an atomic number of 20 but there are three isotopes of calcium - 39, 40, and 42.