How many MOLES are in 35.47g of H2SO4?
A. .37 mol
B. .037 mol
C. .3656 mol
D. .03656 mol
Answers
Answer:
C
Explanation:
Divide 35.47 by the molar mass
Related Questions
as -19.4 kj/mol for ca2 ca2 entering the frog muscle cell. what does this numerical value signify about the physical process taking place?
Answers
the numerical value of -19.4 kj/mol signifies that the process of Ca2+ entering the frog muscle cell is exothermic. This means that energy is released during the process, resulting in a decrease in the enthalpy of the system. The negative sign indicates that the reaction is exothermic
the numerical value of -19.4 kj/mol signifies that the process of Ca2+ entering the frog muscle cell is exothermic. This means that energy is released during the process, resulting in a decrease in the enthalpy of the system. The negative sign indicates that the reaction is exothermic, while the value of -19.4 kj/mol represents the amount of energy released per mole of Ca2+ that enters the cell. This value is important because it provides information about the energetics of the process and helps to understand the thermodynamics of the system.
The numerical value -19.4 kJ/mol for Ca2+ ions entering the frog muscle cell signifies that this is an exothermic physical process.
An exothermic process is one in which energy is released, typically in the form of heat, during the reaction or transformation. The negative sign (-) in front of the value -19.4 kJ/mol indicates that energy is being released as the Ca2+ ions enter the frog muscle cell. This process is essential for muscle contraction and overall muscle function in the frog.
To know more about exothermic , visit
https://brainly.com/question/31214950
#SPJ11
Describe how the amplitude of a wave is related to the energy in a wave.
Answers
As the amplitude of a wave increases, the energy transmitted by the wave increases.
What is the amplitude of a wave?
The amplitude of a wave is the maximum displacement of the wave. The amplitude of a wave is measured in meters.
The amplitude of a wave is related to the energy in a wave in the following equations;
P = ¹/₂μω²A²v²
where;
P is the average power of the wave (J/s)μ is the mass per unit length of the string (kg/m)ω is the angular speed of the wave (rad/s)A is the amplitude of the wave (m)v is the speed of the wave (m/s)Thus, from the equation above, the energy of a wave or energy transmitted per second is directly proportional to the square of the amplitude of the wave.
Learn more about energy of a wave here: https://brainly.com/question/19036728
#SPJ1
Convert 1345 g to mg
Answers
Answer:
1345000
Explanation:
multiply the mass value by 1000
When the frequency of a wave increases, what happens to the wavelength?
It increases
It disappears
It does not change
It decreases
Answers
Answer:
It decreases.
Explanation:
I just took the test.
Find the area of the shaded region of the trapezoid. A. 364 sq. units B. 130 sq. units C. 429 sq. units D. 663 sq. units
Answers
the area of the shaded region of the trapezoid. is 270 - 45 = 225 sq. units. Thus, the answer is option A which is 225 sq. units.
To find the area of the shaded region in the trapezoid, we need to subtract the area of the smaller triangle from the area of the larger triangle. The height of both triangles is the same, so we only need to find the bases.
The base of the larger triangle is the sum of the bases of the trapezoid, which is 15 + 30 = 45 units. The height of the triangle is 12 units, so the area of the larger triangle is (1/2) x 45 x 12 = 270 sq. units.
To find the base of the smaller triangle, we need to subtract the length of the shorter base of the trapezoid (15 units) from the longer base (30 units) and divide by 2. So, the base of the smaller triangle is (30 - 15)/2 = 7.5 units. The area of the smaller triangle is (1/2) x 7.5 x 12 = 45 sq. units.
Therefore, the area of the shaded region is 270 - 45 = 225 sq. units. Thus, the answer is option A which is 225 sq. units.
The correct question is :Find the area of the shaded region of the trapezoid.
A. 225 sq. units
B. 130 sq. units
C. 429 sq. units
D. 663 sq. units
To know more about trapezoid, visit:
https://brainly.com/question/22227061
#SPJ1
calculate the number of moles when 50g of copper (II) sulfate crystals, CuSO4.5H2O
Answers
Explanation:
To calculate the number of moles of copper (II) sulfate crystals (CuSO4.5H2O) in 50g, we first need to find the molar mass of CuSO4.5H2O.
The molar mass of CuSO4 is:
Cu: 63.55 g/mol
S: 32.06 g/mol
O (4 atoms): 15.99 g/mol x 4 = 63.96 g/mol
H2O (5 molecules): 18.02 g/mol x 5 = 90.10 g/mol
Therefore, the molar mass of CuSO4.5H2O is:
Molar mass = (63.55 + 32.06 + 63.96 + 90.10) g/mol
= 249.67 g/mol
Next, we can use the formula:
number of moles = mass / molar mass
where mass is the given mass of CuSO4.5H2O, and molar mass is the value we just calculated.
Substituting the values, we get:
number of moles = 50 g / 249.67 g/mol
= 0.2002 mol (rounded to four significant figures)
Therefore, 50g of copper (II) sulfate crystals contain 0.2002 moles of CuSO4.5H2O
Electrons are held in an atom by attraction to what particle.
Answers
Answer:
Protons
Explanation:
That would be protons, who have a positive charge to an electron’s negative charge. Their attraction is what keeps an electron inside the atom.
ethylene glycol is the principal ingredient in antifreeze. how many grams of ethylene gycol will be needed to lower the freezing point of 2100 g of water by 20°C
Answers
Depending on the antifreeze solution's content, 2100 g of water needs 20 g of ethylene glycol to freeze at a lower temperature. Because ethylene glycol is hygroscopic—it collects water from the air—the amount of antifreeze needed to attain a certain freezing point will vary based on the relative humidity of the surrounding area.
Typically, a 40% antifreeze solution is utilised, which implies that 60% of the solution is water and 40% of the solution is ethylene glycol. This data may be used to determine how much ethylene glycol is needed.
Ethylene glycol is needed in amounts equivalent to 40% of the total solution in a 40% solution, or 0.4 x 2100 g = 840 g of ethylene glycol. Therefore, 840 g is required to lower the antifreeze solution.
Learn more about ethylene gycol at:
https://brainly.com/question/14797464
#SPJ1
Use equation (14.2) to make a semilog plot of conduction electron concentration versus (1/kT) for intrinsic (pure) silicon. The conduction electron concentration in Si at T=293 K (room temperature) is 1010 cm−3. (b) Below what temperature are there essentially no charge carriers in pure Si (say, less than one carrier per cm3 )? (c) Is there some temperature below the melting point of Si (Tmelting =1690 K ) at which the conduction electron concentration in Si is comparable to that of a metal?
Answers
If the surface concentration is 1018 atoms/cm3, the depth below the surface at which the concentration is 1017 atoms/cm3 is 0.32 cm.
The expression is as follows:
erf (x / 2 D t) = (Cs - Cx) / (Cs - Co)
where Cs = surface concentration = 1018 atoms/cm3
Cx = depth concentration = 1017 atoms/cm3
Co - solute concentration in solid
erf stands for error function.
(1018 - 1017) / 1018 = (Cs - Cx) / (Cs - Co)
= 0.00098
erf (x / 2 D t) = 0.00098
0.000868 = x / 2 √ 2 × 10⁻² × 5 (3600) (3600)
x = 0.32 cm
0.32 cm is the depth.
To learn more about depth please click on below link
https://brainly.com/question/13804949
#SPJ4
what is the amount of molecules in 5 moles of nitrogen gas, N2?
Answers
The amount of molecules= 3.01 x 10²⁴
Further explanationGiven
5 moles of N2
Required
The number of molecules
Solution
The mole is the number of particles(molecules, atoms, ions) contained in a substance
1 mol = 6.02.10²³ particles
Can be formulated
N=n x No
N = number of particles
n = mol
No = Avogadro's = 6.02.10²³
For 5 moles :
= 5 x 6.02 x 10²³
= 3.01 x 10²⁴
How many chemical changes can something go through
Answers
Answer:
Only one
Explanation:
12) The combustion of propane (C3H8) in the presence of excess oxygen yields CO2 and
H2O:
C3H8 (g) + 5O2 (g) 3CO2 (g) + 4H2O
When 2.5 mol of O2 are consumed in their reaction, __________ mol of CO2 are produced.
A) 1.5
B) 3.0
C) 5.0
D) 6.0
E) 2.5
show work
Answers
Answer:
algerbra
Explanation:
ajdfdvkjldf
Please Balance the Chemical Equations 1 - 6
Answers
The balanced equations are given below:
1. 2 Cu₂O + C ---> 4 Cu + CO₂
2. 2 H₂O₂ ---> 2 H₂O + O₂
3. 2 AI + Fe₃N₂ ---> 2 AlN + 3 Fe
4. 8 Ag₂S --> 16 Ag + S₈
5. 3 ZnS + 2 AIP ---> Zn₃P₂ + Al₂S₃
6. 2 Fe(OH)₃ ---> Fe₂O₃ + 3 H₂O
What are balanced equations?A chemical equation that is balanced has equal amounts of each element's atoms on both sides of the equation and conserves mass.
An element is balanced if it has the same amount of atoms on both sides of the equation. The equation is balanced if all the moles of atoms of component elements are equal on both sides of the equation.
Learn more about balanced equations at: https://brainly.com/question/26694427
#SPJ1
In the following reaction:
2 NaCl + Pb → PbCl2 + 2 Na
100.0 grams of Pb are added to an excess of NaCl. How many moles of Na are produced?
Answers
Answer:
About 0.965 mol Na
Explanation:
Which statement is correct?
Baking is a chemical change.
Burning is a physical change.
Rusting is a physical change.
Melting is a chemical change.
Answers
Baking is a chemical change when you bake a cake the ingredients go through a chemical change. .
What is chemical change?Chemical Change is defined as the process in which the atoms of one or more substances are rearranged or combined to form a new substance. When a substance undergoes chemical change the chemical properties of the substance changes and it is transformed into a different substance with different chemical composition. Examples are burning of any substance, rusting of iron.
Therefore a chemical change occurs when the molecules that compose two or more substances are rearranged to form a new substance.
Learn more about chemical change here: brainly.com/question/1222323
#SPJ1
In a quick audit of the tiered deployment of the Covid-19 vaccines in the state of California, the probability that a person has received a vaccine shot given that the person is elderly is 70 percent, whereas the probability that a person has received a vaccine shot given that the person is not elderly is 2 percent. 2 The proportion of Californians who are elderly is 0.111. Compute the probability that a person is elderly given that the person has received a vaccine shot. 3. DUI Checkpoint A breath analyzer, used by the police to test whether drivers exceed the legal limit set for the blood alcohol percentage while driving, is known to satisfy P(A∣B)=P(Ac∣Bc)=x where Ais the event "breath analyzer indicates that legal limit is exceeded" and B "driver's blood alcohol percentage exceeds legal limit." On Saturday nights, about 5% of the drivers are known to exceed the limit. (a) Describe in words the meaning of P(Bc∣A) (b) Determine P(Bc∣A) if x=0.95 (c) How big should x be so that P(B∣A)=0.9 ?
Answers
The value of x should be 1/9.
The proportion of Californians who are elderly is 0.111.
The probability that a person has received a vaccine shot given that the person is elderly is 70%
The probability that a person has received a vaccine shot given that the person is not elderly is 2%
Probability that a person is elderly given that the person has received a vaccine shot is to be calculated.
Probability that a person is elderly and has received a vaccine shot,
P(E and V)=P(V | E) P(E)P(V | E) = 70%, P(E) = 0.111, soP(E and V) = (0.7) (0.111) = 0.0777
Probability that a person has received a vaccine shot, P(V) = P(E and V) + P(NE and V) P(NE) = (0.7) (0.111) + P(NE and V) P(NE) = 0.0777 + P(NE and V)P(NE and V) = P(V | NE) P(NE)P(V | NE) = 2%, soP(NE and V) = (0.02) (1 - 0.111) = 0.0178P(V) = 0.0777 + 0.0178 = 0.0955
Probability that a person is elderly given that the person has received a vaccine shot, P(E | V) = P(E and V) / P(V) = 0.0777 / 0.0955 = 0.8148(a) P(Bc|A) is the probability of driver’s blood alcohol percentage is not exceeding the legal limit, given that the breath analyzer indicates that legal limit is exceeded.
(b) We know that P(A|B) = P(Ac|Bc) = 0.95 and P(B) = 0.05P(A) = 1 - P(Ac) = 1 - 0.95 = 0.05P(Bc|A) = P(Ac|Bc) P(Bc) / P(A)P(Bc) = 1 - P(B) = 1 - 0.05 = 0.95P(Bc|A) = 0.95 × 0.95 / 0.05 = 18.05(c) P(B|A) = x and P(A) = 0.05P(Ac) = 0.95, P(B|Ac) = 0P(B|A) = P(B and A) / P(A)P(B and A) = P(B|A) P(A) = x (0.05)P(Bc|Ac) = 1 - x = P(Ac|Bc) = P(Bc|Ac) P(Ac) / P(Bc) = (1 - x) (0.95) / 0.95P(B) = P(B and A) + P(B and Ac) = x (0.05) + (1 - x) (0.95) = 0.95 - 0.9 x
Therefore,0.9 x = 0.95 - 0.05x = 1/9
Hence, the value of x should be 1/9.
learn more about proportion of Californians on
https://brainly.com/question/13949040
#SPJ11
2. Which equation is correctly balanced?
A. H₂+O₂ → H₂O
B.
Ca + Cl₂ → CaCl
C.
2H2 + O2 → 2H₂O
D.
Ca + Cl₂ → Ca₂Cl
Answers
The equation is correctly balanced is option C is correct 2H₂ + O₂ → 2H₂O
A balanced equation is a chemical equation in which mass is conserved and there are equal numbers of atoms of each element on both sides of the equation
Here in the given reaction option C is correct because 4 atoms of hydrogen on reactant side. 2 atoms of oxygen on reactant side
2H₂ + O₂ → 2H₂O
And the other reaction is not balanced reaction because in reactant side or in product side there is difference so it is not balanced
Know more about balanced equation
https://brainly.com/question/12192253
#SPJ1
Which of the following is not true of deciduous forests?
a.
characterized by four seasons
b.
trees lose their leaves in the fall.
c.
precipitation is concentrated in one season
d.
averages 30-60 inches of precipitation annually
Answers
The Option C is correct precipitation is concentrated in the season
Hope it help
Answer:
C) precipitation is concentrated in one season
Explanation:
edge 2020
3. A typical peanut butter and jelly sandwich contains 360 kcal, of which 160
kcal comes from fat. Given 1 kcal = 4.2 kJ, how many J of fat would there be
in one PB&J sandwich?
Answers
Explanation:
here's the answer to your question
what is glue made up of
Answers
Answer:
Glue is made up of - combination of polyvinyl acetate (PVA), water, ethanol, acetone and other substances. The animal remains that are the raw materials for glue may include ears, tails, scraps of hide or skin, scrapings from the fleshy sides of hides, tendons, bones and collagen taken from animal parts, particularly horse hooves and bones.
Explanation:
Oof hope this helps =)
Answer:
Synthetic glues and adhesives are made from polyvinyl acetate, water, ethanol, acetone and some other substances. The water is used to modify the glue's consistency while the other substances are used to control the drying rate of the glue.
Which of the following molecules shows two atoms of hydrogen (H)? (1 point)O 2H₂OO 2CHAO HO₂O H₂SO4
Answers
Explanation:
H2O:
2 H2O shows 2 atoms of hydrogen. The number 2 in front of it means 2 moles of H2O
----------
CHA:
It only shows 1 atom of hydrogen
1 CHA means 1 mole of CHA
2 CHA means 2 moles of CHA
----------
HO2:
It only shows 1 atom of hydrogen
---------
H2SO4:
It shows 2 atoms of hydrogen
Answer:
H2O
H2SO4
IN NEED OF QUICK HELP Name both the reactant and product and then draw the reactant and product
Please explain
thanks
Answers
The reactant in this reaction is 2-fluoro-5-propyl - heptane while the product is 2-hydroxy-5-propyl - heptane.
What is a substitution reaction?We define a substitution reaction as one in which a given moiety is replaced by another. This is an example of a substitution reaction.
The name of the reactant in this reaction is 2-fluoro-5-propyl - heptane while the product is 2-hydroxy-5-propyl - heptane.
Learn more about substitution reaction:https://brainly.com/question/16811879?
#SPJ1
how do you make a potion of slow falling
Answers
Answer:
So you can make it longer by putting in some redstone. And this will give you a potion that will last for 4 minutes. Alright we're done it's got 4 minute slow falling potions.
Explanation:
Answer:
Ok, to make a slow falling potion, you need 1 water bottle, 1 nether wart, and 1 fantom membrane.
Explanation:
hope I could help, lmk if I did!
Which of the following techniques would be the best choice for screening a person's genetics for 1,000 or more genes?
A. Microarray analysis
B. RELP analysis
C. Sequencing
D. Karyotyping
Answers
The best choice for screening a person's genetics for 1,000 or more genes would be: C. Sequencing.
Sequencing techniques, such as next-generation sequencing (NGS), are well-suited for screening a large number of genes efficiently and comprehensively. NGS allows for high-throughput sequencing of DNA, enabling the simultaneous analysis of multiple genes or even the entire genome. It provides detailed information about the sequence of nucleotides in the DNA, allowing for the identification of genetic variations, mutations, or other genomic features.
Microarray analysis (A) is a technique that can analyze gene expression patterns or detect specific genetic variations, but it is limited in the number of genes it can assess simultaneously compared to sequencing.
RELP analysis (B) is a technique used for detecting genetic variations based on restriction enzyme digestion patterns, but it is more suitable for specific target regions rather than screening a large number of genes.
Karyotyping (D) involves the visualization and analysis of chromosomes to detect large-scale chromosomal abnormalities but is not suitable for screening a large number of individual genes.
To know more about DNA
brainly.com/question/32663516
#SPJ11
What did I do wrong?
Answers
Answer: I think you did nothing wrong
Explanation: I think you did nothing wrong
twenty-four grams of magnesium metal reacts with sixteen grams of oxygen gas to form magnesium oxide. According to the law of conservation of mass, how much magnesium oxide will there be after the chemical change is complete?
Explanation:?
Answers
Answer:
twenty-four grams of magnesium metal reacts with sixteen grams of oxygen gas to form magnesium oxide. According to the law of conservation of mass, how much magnesium oxide will there be after the chemical change is complete
Explanation:
twenty-four grams of magnesium metal reacts with sixteen grams of oxygen gas to form magnesium oxide. According to the law of conservation of mass, how much magnesium oxide will there be after the chemical change is complete
What is the radius of this circle if the circumference is 18 pi cm?
Answers
Answer: 2.86 inches
Explanation: To find the radius, then, we insert 18 in for the circumference. So 18=2∏r. Solving for r gives 9/∏, or approximately 2.86 inches.
Answer:
2.86 inches
Explanation:
Give me some questions exam/test questions or hypothetical questions which apply the general formula for alkanes (CnH2n+2) and alkenes (CnH2n)
Answers
Explanation:
CnH2n−2
is the formula for ____________.
The method of converting from an
amount of one substance to an
amount of another substance using a
balanced chemical equation.
Answers
Explanation:
one substance
+one substance=balanced of chemical equation
Can someone please help with giving me some important information about Zr-Zirconium because i can find it anywhere and i have a project about it.. thanks!
Answers
Answer:Zirconium is a chemical element with the symbol Zr and atomic number 40. The name zirconium is taken from the name of the mineral zircon, the most important source of zirconium. It is a lustrous, grey-white, strong transition metal that closely resembles hafnium and, to a lesser extent, titanium. Zirconium is mainly used as a refractory and opacifier, altho…