Answer:
7.56°C is the temperature when the gas occupies 400cm³
Explanation:
Based on Charles's law, the volume of a gas is directly proportional to its absolute temperature under constant pressure. The equation is:
V₁T₂ = V₂T₁
Where V is volume and T is absolute temperature of 1, initial state and 2, final state of the gas.
Computing the values:
V₁ = 560cm³
T₂ = ?
V₂ = 400cm³
T₁ = 120°C + 273.15 = 393.15K
560cm³*T₂ = 400cm³*393.15K
T₂ = 280.71K - 273.15 =
7.56°C is the temperature when the gas occupies 400cm³1. What mass of Mgo will I make from 48 g of Mg?
2Mg + O2 + 2MgO
Answer:
80.6 g
Explanation:
MgO=24.3+16=40.3 g
48.6/24.3= 2 moles
64/2x16= 2 moles
2x40.3= 80.6g
Phosphates are formed when phosphorus reacts with
A. carbon.
B. oxygen.
C. nitrogen.
Option B is correct. Phosphates are formed when phosphorus reacts with Oxygen
A phosphate group is formed from the bonding of four oxygen atoms to a phosphorous atom. The chemical reaction is as shown:
P + O₄ -> PO₄
P is the symbol of phosphorus
O is the symbol of oxygen
When both elements combine, they form phosphates.
Hence we can conclude that Phosphates are formed when phosphorus reacts with Oxygen
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A fluid is a liquid or a(n) _____.
Answer:
gas...............................
There are 9.88x1023 molecules of O2 available.
a.How many moles of O2?
b. How many grams of CO2 can form?
Answer:
1.64 moles O₂
Explanation:
Part A:
Remember 1 mole of particles = 6.02 x 10²³ particles
So, the question becomes, how many '6.02 x 10²³'s are there in 9.88 x 10²³ molecules of O₂?
This implies a division of given number of particles by 6.02 x 10²³ particles/mole.
∴moles O₂ = 9.88 x 10²³ molecules O₂ / 6.02 x 10²³ molecules O₂ · mole⁻¹ = 1.64 mole O₂
_______________
Part B needs an equation (usually a combustion of a hydrocarbon).
How many moles is 118 grams of Argon
Answer:
[tex]\boxed {\boxed {\sf About \ 2.96 \ moles \ of \ Argon}}[/tex]
Explanation:
To convert from grams to moles we must use the molar mass, which is found on the Periodic Table.
Argon: 39.9 g/molUse the molar mass as a ratio.
[tex]\frac{39.9 \ g \ Ar}{1 \ mol \ Ar}[/tex]
Multiply by the given number of grams: 118
[tex]118 \ g \ Ar *\frac{39.9 \ g \ Ar}{1 \ mol \ Ar}[/tex]
Flip the fraction so the grams of argon will cancel each other out.
[tex]118 \ g\ Ar * \frac{1 \ mol \ Ar}{39.9 \ g \ Ar}[/tex]
[tex]118 * \frac{ 1 \ mol \ Ar}{39.9 \ g \ Ar}[/tex]
[tex]\frac {118 \ mol \ Ar }{ 39.9 }[/tex]
[tex]2.95739348 \ mol \ Ar[/tex]
The original measurement of grams had 3 significant figures, so our answer must have 3 sig figs.
For the number we calculated, that is the hundredth place. The 7 in the thousandth place tells us to round the 5 to a 6.
[tex]2.96 \ mol \ Ar[/tex]
There are about 2.96 moles of Argon in 118 grams.
Whats the correct answer ???
2 Hgo 2 Hg + O2
1. How many grams of mercury (Hg) can be
produced from 3.55 moles of Hgo?
Answer:
712 moles of Hg are produced
Explanation:
Based on the reaction:
2HgO → 2Hg + O₂
Where 2 moles of HgO reacts producing 2 moles of Hg and 1 mole of O₂
To solve this question we need to find the moles of Hg produced, then, using its molar mass:
Moles Hg:
3.55mol HgO * (2 mol Hg / 2 mol HgO) = 3.55 mol Hg
Grams -Molar mass Hg: 200.59g/mol-:
3.55mol Hg * (200.59g/mol) =
712 moles of Hg are produced
When bacteria reproduces asexually are the offspring uniform or diverse?
Bacteria reproduces asexually and produce genetically identical offspring. They produces a large number of offspring quickly and all will be uniform.
What is binary fission?Binary fission is the asexual method of reproduction in bacteria. Asexual reproduction creates clones of the original parent, which results in kids that are genetically identical to the parent.
Asexual reproduction allows for the rapid production of vast numbers of children by a single person. Asexual reproduction is a successful method of reproduction in a stable or predictable environment since all the children will be suited to that environment.
Asexually reproducing organisms may be at a disadvantage in an unstable or unpredictable environment since all of the progeny are genetically similar and might not have the genetic diversity to survive in new or changing settings.
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DUE IN 10 MINUTES PLZZZZ
Part IV: True/False
____ 38. The mass of the nucleus is small compared to the mass of the atom.
____ 39. Alpha particles would be harder to turn than Beta particles.
____ 40. Positive charge was spread all throughout the atom in the Rutherford Model.
____ 41. The Manhattan Project was located in New York for most of its duration.
____ 42. The cathode rays produced by Thomson were identical for all filaments.
____ 43. It is possible to know where an electron is and what path it is on.
____ 44. X-rays are produced when fast moving electrons strike phosphor coatings.
____45. All nuclear changes involve at least two reactants.
Answer:
true false true false true fake
Answer:
38. False
39. True
40. True
41. True
42. False
43. False
44. True
45. True
Explanation:
Note these are just my guesses they might not all be correct but I will do my best.
Hope this helps you at all! Feel free to correct me if I got any of them wrong :)
Mr. Avogadro has set up 4 jars with one mole of each the following substances:
1. Iron
2. Sodium Chloride
3. Sodium Bicarbonate (NaHCO3)
4. Aluminum
His clever and intelligent students notice that all of the amounts of the various
substances are different from one another, even though they are all ONE MOLE.
Explain the reason why each amount in the jar is different in terms of the mole. Then,
calculate the molar mass for each of the substances. Circle your your answers and
include the unit used for molar mass.
Answer:
Although they have the same mole, they have different molar masses because of their chemical composition.
1. Iron: 55.845 g/mol
2. Sodium Chloride: 58.44 g/mol
3. Sodium Bicarbonate (NaHCO3): 84.006 g/mol
4. Aluminum: 26.982 g/mol
Explanation:
Use the periodic table to determine their molar masses by looking at the atomic mass of each element
1. Given
2. 22.99 (Na) +35.45(Cl) =58.44
3. 22.99(Na)+1.008(H)+12.011(C)+[3*15.999 (O)] = 84.006
Notice how O is multiplied by 3 because there are 3 atoms of oxygen
4.Given
Why is it true to say that calcium carbonate
has both ionic and covalent bonds? the
Answer:
Calcium carbonate (CaCO3), essentially, is an ionic compound having the bivalent calcium and carbonate ions.
But the carbonate anion is a polyatomic species. The carbon atom is bonded to all the three oxygen atoms by covalent bonds - two carbon-oxygen single bonds and one carbon-oxygen double bond. Owing to resonance, the three carbon-oxygen bonds are also of equal length in the carbonate anion.
Any salt having a polyatomic ion invariably contains both ionic and covalent bonds.
is soil a producer, decomposer, or consumer
How many atoms are found in one molecule of water?
Answer: To calculate the number of molecules and atoms in a water drop, you need to know the chemical formula of water. There are two atoms of hydrogen and one atom of oxygen in each water molecule, making the formula H 2 O. So, each molecule of water contains 3 atoms. Molar Mass of Water
Explanation: Hope this helps!
From: Kenma! ^^
Answer:
the answer is 3 atomsExplanation:
complete combustion of wax takes place in____ zone of a candle flame.
Answer:
outer or non - luminous
Explanation:
complete combustion of wax takes place in non-luminous zone of a candle flame.
Answer:
A complete combustion of wax takes place in outer zone of a candle flameExplanation:
The middle zone is yellow and luminous because As it is an oxygen-depleted zone, insufficient oxygen exists to burn all of the wax vapor. ... The outer zone is the area where the flame is the hottest and complete combustion of wax takes place.9. _____________ have a mass number of 0.
10. Particles found in the nucleus are called ______________________.
11. _____________________________ is when electrons are released by a hot filament.
12. The number of protons and neutrons in an element is called the _______________ number.
13. ____________________ was the first atomic bomb dropped.
14. _________________ would be an example of a spontaneous change to the nucleus.
15. _____________ decay results in the release of two protons and two neutrons.
16. __________________ are particles that would be attracted to a positively charged plate.
17. __________________________ coined the word radioactivity.
18. ____________________________________ is used to produced radioactive isotopes by
forcing nuclear reactions.
19. During __________________, the nucleus of a Uranium 235 atom is split into lighter
elements, neutrons, and energy.
20. _________________ are the fastest form of radiation.
21. The number of protons in an element is called the _______________ number.
22. Irene Curie used ___________________ as the source of alpha particles for her research.
23. Uranium goes through _____________ decay ____________ (a number) times to produce
Plutonium.
24. ________________ is a raw Uranium ore which was central to the discovery of radioactivity.
25. The ____________________ was cited in the letter signed by Einstein as having ore with
high concentrations of U-235.
Answer:
sheeesh thats a lot
Explanation:
Answer:
9. Neutronium
10. Protons and Neutrons
11. cathode
12. mass
13. Little Boy
14. Radioactive decay
15. Alpha
16. Electrons
17. Marie Curie
18. Nuclear fission
19. fission
20. Gamma
21. atomic
22. aluminum foil
23. beta/ 2
24. X-rays
25. Einstein–Szilárd letter
Can somebody help me please! Help would be much appreciated :))
Answer:
The first picture shows how the two H athoms finds each other. The second one, how these H athoms start's to form a covalent bond describing it by Lewi's estructure. And the last one, shows how the two athoms of H formed an H2 molecula.
Explanation:
What is the name of theses
NO2
N2O
ZnF2
CCl4
SeH2
K2O
Answer:
nitrogen
nitrogen oxide
zincflorite
?
potassium oxide
A family pool holds 10,000 gallons of water. How many cubic centimeters is this?
Answer:
3.785412e+7cm³
Explanation:
Have a nice day.
what is hybridization
Answer:
Hybridization is the concept of mixing atomic orbitals into new hybrid orbitals suitable for the pairing of electrons to form chemical bonds in valance bond theory.
does sugar have ionization of ions in water
Solve the following problem with the correct number of significant figures.
5.31 cm + 8.4 cm + 7.932 cm
Multiple choice question.
A)
22 cm
B)
21.6 cm
C)
21.642 cm
D)
21.64 cm
How many moles are there in 3.9 grams of potassium
Answer:0.025576559594663 mole.
Explanation:
define sedimentary, metamorphic, igneous
Answer:
these are all types of rocks
sedimentary are formed through the accumalation of different material from earths surface. Like the grand Canyon!
Metamorphic rocks are formed from heat, preasure, or a combination. Found mostly near tectonic plates meet.
Igneous are molten rock.
Explanation:
Sedimentary- a rock that has formed from sediment deposited by water or air
Metamorphic- a rock that has transformed by heat,pressure,or other natural causes
Igneous- a rock that has been solidified by lava or magma
How many moles are in 1.6g HCl ?
Answer:
0.0438825768068512
Explanation:
use a calculator online, you wont have to wait
The outside layer of cells on the top and bottom of a leaf
Answer:
I think it would be the Stomata and the Lower Epidermis
The Earth's surface is warmed because _____.
the ionosphere traps the sun's heat
it absorbs all of the sun's radiation
the atmosphere absorbs more short-wave radiation than the land
land and water absorb more short-wave radiation than the atmosphere
Answer:
b it absorbs all of the suns radiation
Answer:
land and water absorb more short-wave radiation than the atmosphere
Explanation:
QUICK!!!! please
Which of the following dilutions would produce 2.0M acid from 3.0M acid
A) 3.0mL acid and 2.0mL water
B) 2.0mL acid and 1.0mL water
C) 2.0mL acid and 3.0mL water
D) 1.0mL acid and 2.0mL water
Answer:
that's a difficult question
Explanation:
Sorry!!!!!
Which characteristic is a behavior adaptation in birds?
of course migration
Explanation:
if you need help again i'll be there.
Answer:
yea its migration
Explanation:
Which is not an example of a code?
Choose the correct answer.
A. a secret
B. a memory from the past
C. the sign language alphabet
D. the information on a credit card
Sound wave a has lower frequency than sounds wave b but both waves have the same amplitude . What must also be true of these two waves ?
Explanation:
Higher the frequency smaller will be the wavelength. Higher frequency have shorter wavelength and lower frequency waves have larger wavelength. Also, Beats are formed by the superposition of two waves with slightly different frequencies but with similar amplitudes. In time, waves switch between constructive interference and disruptive interference, giving the resultant wave a time-varying amplitude.
The true statement about these two waves is option C. Wave A has a lower pitch.
Sound waves:
Sound waves when traveling via air are known as longitudinal waves .
Since sound passes via air, the particles of air does not vibrate in a transverse manner. Also, amplitude controls the loudness while on the other hand, frequency controlled the pitch. That means, the more frequent the higher should be the pitch.
Therefore, the correct option is C.
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