Answer:
Answer is 46.00%
Explanation:
absolute mass= A1F1 +A2F2
100
42.8452= 44×8% + 41×( 100--F2)
100
so you get
F2= 46.00%
am not sure
What is the difference between an exoplanet and a pulsar
Answer:
exoplanet: a planet that orbits a star outside the solar system.
pulsar: a celestial source of pulsating electromagnetic radiation (such as radio waves)
Explanation:
exoplanet: a planet that orbits a star outside the solar system.
pulsar: a celestial source of pulsating electromagnetic radiation (such as radio waves)
1) Calcula la masa molecular para las siguientes sustancias
f) Mg3(PO4)2
g) Cu(NO2)3
h) C5H12
i) (NH4)4 As2O7
j) I2O7
2)Halla la composición porcentual de cada una de las siguientes sustancias
- H3PO4
• HIO3
• H2C2O4
• C3H6O3
• NH3
• KBr
Porfavor es para mañana mismo
Ch.3, S5, page
69, BOS
Calculate the mass of 1.5 moles of calcium atoms.
NA=6x 1023
Mass=
g give your answer to two significant figures.
Answer:
60g
Explanation:
The molar mass of a substance (Atom or molecule) is defined as the mass in grams that 1 mole of substance (6x10²³ particles of this substance) weighs. Using the periodic table of elements we can know the molar mass of each atom.
For example, the molar mass of Calcium is 40.078g / mol.
That means the mass of 1.5 moles of calcium atoms must be:
1.5 moles * (40.078g / mol) =
60gHow many different elements are involved in the reaction shown below?
2Fe + 6HC2H3O2 → 2Fe(C2H3O2)3 + 3H2
There are four. Fe, H, C, and O
Write Avogadro's number in "longhand", and then in scientific notation.
Answer:
Explanation: the scientific notation used to calculate a mole is 6.022 x 1023.
Avogadro's number in scientific notation is 6.023×10²³ atoms, molecules, moles.
What is Avogadro's number?Avogadro's number is defined as a proportionality factor which relates number of constituent particles with the amount of substance which is present in the sample.
It has a SI unit of reciprocal mole whose numeric value is expressed in reciprocal mole which is a dimensionless number and is called as Avogadro's constant.It relates the volume of a substance with it's average volume occupied by one of it's particles .
According to the definitions, Avogadro's number depend on determined value of mass of one atom of those elements.It bridges the gap between macroscopic and microscopic world by relating amount of substance with number of particles.
Number of atoms can be calculated using Avogadro's number as follows: mass/molar mass×Avogadro's number.
Learn more about Avogadro's number,here:
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A sample of 1.00 moles of oxygen at 50°C and 98.6 kPa, occupies what volume?
Answer:
27.22 dm³
Explanation:
Given parameters:
number of moles = 1 mole
temperature= 50°C, in K gives 50+ 273 = 323K
Pressure= 98.6kpa in ATM, gives 0.973 ATM
Solution:
Since the unknown is the volume of gas, applying the ideal gas law will be appropriate in solving this problem.
The ideal gas law is mathematically expressed as,
Pv=nRT
where P is the pressure of the gas
V is the volume
n is the number of moles
R is the gas constant
T is the temperature
Input the parameters and solve for V,
0.973 x V = 1 x 0.082 x 323
V= 27.22 dm³
At a football stadium, 5% of the fans in attendance were teenagers. If there were 160 teenagers at the football stadium, what was the total number of people at the stadium?
Answer:
yes
Explanation:
bc god exist
Answer:
3200
Explanation:
___ act as an energy source? (From work bank)
Explanation:
bit.^{}
ly/3a8Nt8n
jjsjjsjsjjzjsjsjs
Which pair of compounds represents one Arrhenius acid and one Arrhenius base?
1. CH3OH and NaOH
2. HNO3 and NaOH
3. CH3OH and HCI
4. HNO3 and HCI
Answer: C HNO3 and NaOh
Explanation:
HURRY WILL GIVE BRAINLIETS How are proteins and nucleic acids related? They both provide energy. They both carry genetic information. The structure of proteins is determined by nucleic acids. The subunits of nucleic acids are also the subunits of proteins.
Answer: the answer is “C”
Explanation:
Took the T E S T
A student pours Liquid A through filter paper. the liquid passes through the filter paper, but a residue remains on the filter. Liquid A must have been a(n)
A - Element
B - Compound
C - Plasma
D - Mixture
Answer:
I think it is A.Element maybe
How many moles of mercury(II) oxide, HgO, are needed to produce 125 g of oxygen, O2? How many moles of mercury is produced?
Laughing gas (nitrous oxide, N2O) is sometimes used as an anesthetic in dentistry. It is produced when ammonium nitrate is decomposed according to the following reaction.
NH4NO3(s) ---> N2O(g) + H2O(l) How many grams of NH4NO3 are required to produce 33.0 g N2O? and How many grams of water are produced in this reaction?
Answer: 7.81 mol HgO (How many moles of mercury(II) oxide, HgO, are needed to produce 125 g of oxygen, O2?)
Explanation:
If the prescribed dosage of milk of magnesia Mg(OH)2 is 3.5 moles, how many grams
would you need to take? Round to the nearest tenth (one digit after the decimal).
A. 92.1 g
B. 204.2g
C. 157.2 g
D. None of the above
Answer:
B
Explanation:
1 mole is equal to 58.31968 grams.
so 3.5 moles equal to answer choice B
an amount of 54.11 grams of pentane, c5h12 ,is equal to
bismuth (V) nitrate + strontium hydroxide
Answer: [tex]2Bi(NO_3)_5(aq)+5Sr(OH)_2(aq)\rightarrow 2Bi(OH)_5(s)+5Sr(NO_3)_2(aq)[/tex]
Explanation:
A double displacement reaction is one in which exchange of ions take place. The salts which are soluble in water are designated by symbol (aq) and those which are insoluble in water and remain in solid form are represented by (s) after their chemical formulas.
A double displacement reaction in which one of the product is formed as a solid is called as precipitation reaction.
The balanced chemical equation is:
[tex]2Bi(NO_3)_5(aq)+5Sr(OH)_2(aq)\rightarrow 2Bi(OH)_5(s)+5Sr(NO_3)_2(aq)[/tex]
Baby Mice
Seif's pet mouse had babies. Five of the babies were black and two were white. The
father mouse was black. The mother mouse was white. Seif and his friends wondered
why the mice were different colors. These were their ideas
Jerome: Baby mice inherit more traits from their fathers than their mothers
Alexa: The baby mice got half their traits from their father and half from their mother.
Juner Male traies are stronger than female traits.
Seif Rack mke have more traies than white mice.
Fiona: The black baby mice are probably make and the white baby mice are probably
female
India, Paver in die for colo don't matter what whine will
Consider Seif and his friends responses/ideas. Answer the
following questions:
1. Which friend has the correct answer about how traits are inherited in this method of reproduction?
2. Is this type of reproduction asexual or sexual? How do you know? (use details from the texti
Answer:
I would say for #1 Fiona and for #2 sexual
Explanation:
Please give brailiest
what is the name for a change in the enviorment that causes an organism to change it's activity
PLEASE HELP BY TODAYYYY!!!
A, brain
B,Response
C, Parasite
D,stimulus
Answer: it’s D
Explanation:an event that provokes a specific functional response in an organ or tissue of an organism is called as stimulus
hope it helps
Select the word that fits in the two blanks below: This is made up of two systems; a central ________ system and a peripheral ___________ system.
Answer:
Nervous; nervous.
Explanation:
A sensory system can be defined as components of the central nervous system (CNS) which comprises of the brain, neural tissues or pathways and sensory neurons responsible for sensory functions, perception and processing sensory informations such as sound, light, heat, etc.
Basically, the central nervous system (CNS) interprete the neural signals that are generated from stimuli that are detected by the sensory system. The five (5) main sense organs in the sensory system are: skin, tongue, ears, nose and the eyes.
Generally, the nervous system found in living organisms such as humans, comprises of two (2) major components or systems; a central nervous system (CNS) and a peripheral nervous system (PNS).
How do properties of water break down rocks?
Answer:
Explanation:
Freezing water can break rock without any change in the minerals that form the rock (physical weathering). This usually produces small particles and sand. Water with dissolved gases and other chemicals causes the minerals in rocks to be changed, leading to the deterioration of the rock (chemical weathering).
chemical weathering
Explanation:
freezing water when mix with it cause detorilation of rocks
Which of the following is true about limiting and excess reagents?
Links are reported
Answer:
the first one
Explanation:
I take this subject
How many grams of Cl are in a 38.0-g sample of the chlorofluorocarbon C2F3Cl3?
12.9 grams of Cl are in a 38.0-g sample of the chlorofluorocarbon C2F3Cl3.
What is chlorofluorocarbon?Chlorofluorocarbon is defined as a gas that was previously widely employed in many items (like aerosols), but is thought to harm the ozone layer in the Earth's atmosphere. Halogen exchange using chlorinated methane's and ethane's as the starting point often produces CFCs and HCFCs. The chlorofluorocarbons undergo free-radical reactions to produce the brominated derivatives, which replace C-H bonds with C-Br bonds.
1 Carbon + 3 Fluorine + 1 Chlorine = CF3Cl
1 × (12.011 g/mol) plus 3 x (18.988 g/mol) + [1 x 35.453 g/mol] 104.428 grams per mole
1 mole per 104.428 grams of 38.0 grams equals 0.364 moles. 0.364% CF3Cl moles 1 mole of Cl and 1 mole of CFCl3 in CF3Cl equals 0.364 moles of Cl.
Chlorine weighs 35.453 grams per mole, so 12.9 grams of chlorine are contained in every 38.0 grams of CF3Cl.
Thus, 12.9 grams of Cl are in a 38.0-g sample of the chlorofluorocarbon C2F3Cl3.
To learn more about chlorofluorocarbon, refer to the link below:
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20
very very very very very very very very hard
what ive learned about heat,sound and light
Answer:
they are all in parts of our life and we need them each for surviving.
Explanation:
How many joules of heat are required to raise the temperature of 320.0 grams of water from 24.2°C to 50.8°C? Heat capacity of water is 4.2 J/g°C.
Answer:
35750.4 Joules
Explanation:
Using the formula as follows;
Q = m × c × ∆T
Where;
Q = amount of heat (joules)
m = mass of substance (g)
c = specific heat capacity (J/g°C)
∆T = change in temperature (°C)
According to the provided information,
mass (m) = 320.0 grams
c = 4.2 J/g°C
∆T = (50.8°C - 24.2°C) = 26.6°C
Q = ?
Using; Q = m × c × ∆T
Q = 320 × 4.2 × 26.6
Q = 35750.4 J
How many grams of sodium carbonate (Na2CO3) are needed to produce 6.78
moles of sodium chloride (NaCl). the molar mass of sodium carbonate is 105
99 g/mol.
Answer:
359.3g of Na₂CO₃ are required
Explanation:
When sodium carbonate, Na₂CO₃ reacts with HCl, NaCl and H₂O are produced as follows:
Na₂CO₃ + 2HCl → 2NaCl + CO₂ + H₂O
Where 1 mole of sodium carbonate produce 2 moles of NaCl
To solve this question, we must find the moles of sodium carbonate required to produce the 6.78 moles of NaCl. With this mass and the molar mass we can find the mass of sodium carbonate as follows:
Moles Na₂CO₃:
6.78 moles NaCl * (1mol Na₂CO₃ / 2mol NaCl) = 3.39 moles Na₂CO₃
Mass Na₂CO₃ -Molar mass: 105.99g/mol:
3.39 moles Na₂CO₃ * (105.99g / mol) =
359.3g of Na₂CO₃ are requiredState one type of additional information that could be used to determine if these three species are closely related.
Answer:
Study the bone structure of limbs.
Explanation:
Study the bone structure of limbs can be used to find out the relatedness and relationship among three species because the pattern of bones structure is similar but the structure is different from one another due to different environmental conditions. This study provides important and useful information whether the three species are closely related or not. If they have similar bone structure than we can say that there are more chances that they are closely related to each other.
1) Which New York State landscape region is located at 42 N, 75 W?
A) Erie-Ontario Lowlands
B) Hudson-Mohawk Lowlands
C) the Catskills
D) Tug Hill Plateau
Answer:C) the Catskills
Explanation:
PPPPPLLLLLZZZZZZ HHHHEEEELLLLLLPPPPPP!!!!!!!!!! QUESTION IS BELOW! :D
Answer:
Explanation:
Both points on a wave oscillate in directions that are perpendicular to the wave's advanced path, resulting in a transverse wave motion. Sea surface ripples, seismic S (secondary) waves, and electromagnetic (e.g., radio and light) waves are examples of transverse waves.
Their frequency and amplitude are related to the amount of energy they bear. The more energy, the higher the frequency, and the more energy, the higher the amplitude. With the activity Investigating waves and electricity, you will create these patterns on your own.
Particles in the medium vibrate to and from in a direction perpendicular to the direction of energy transport in transverse waves.
(hope this helps can i plz have brainlist :D hehe)
How much heat, in kJ, is released when 6 mol of water at 0°C freezes to ice at 0°C if ΔHsolid for water = –6.01 kJ/mol?
Answer:
12.3 kJ
Explanation:
For a given substance, the molar heat of fusion basically tells you one thing from two perspectives
how much heat is needed in order to melt one mole of that substance at its melting point
how much heat must be removed in order to freeze one mole of that substance at its freezing point
It is very important to realize that the molar enthalpy of fusion will carry a positive sign when you're dealing with melting and a negative sign when you're dealing with freezing.
Infer why the sauce on a hot pizza burns your
mouth but the crust of the pizza does not burn
your mouth.
The cheese having a higher thermal conductivity conducts heat better so it can deliver the heat to your mouth more quickly while the pizza crust transmits heat more slowly. So, even if they were the same temperature, the cheese would more likely give your tongue/mouth a severe burn.