Answer:
[tex]Cu_{3}P[/tex]
Explanation:
usually, the first step is to calculate the moles but since that is already given in the question we can move onto the next step
least molar ratio:
Cu = [tex]\frac{1.5}{0.5}[/tex] = 3
P = [tex]\frac{0.5}{0.5}[/tex] = 1
thus, empirical formula = [tex]Cu_{3}P[/tex]
The empirical formula for a compound that has 1.5 moles of copper and 0.5 moles of phosphorus is Cu₃P.
What is the empirical formula?Empirical formula of any compound gives idea about the number of constituents particles present in that compound by mentioning the ration.
In the question, given that:
Moles of copper = 1.5 moles
Moles of phophorous = 0.5 moles
Now we divide the given moles by the smallest number to get the ration number as follow:
Cu : P
1.5/0.5 : 0.5/0.5
3 : 1
Hence, required empirical formula is Cu₃P.
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please begging you guys someone help me
Answer:
See Explanation
Explanation:
10) From the options provided for this question, gamma particle is the most energetic. Recall that gamma rays are high energy electromagnetic radiation which are capable of causing a high degree of ionization in matter.
11) The bombardment of U-235 with neutrons leads to the reaction;
[tex]U\frac{235}{92} + n\frac{1}{0}---> I\frac{138}{53} + Y\frac{95}{39} +3n \frac{1}{0}[/tex]
Hence
a = 92, b= 95, c= 53
12) In positron emission, a proton is transformed into a neutron. The mass number of the daughter nucleus is the same as its parent but the atomic number decreases by 1.
Hence;
[tex]Th\frac{231}{90} -----> e\frac{1}{0} +Ac \frac{231}{89}[/tex]
An unknown compound in the lab is either LiOH, CaF2, or LiF. If the sample has a mass of 260 grams and contains 3.33 moles, what is the identity of the compound?
Answer:
CaF2
Explanation:
1 mole of CaF2 = 78.0748064 grams
78 times 3.33= 259.74
the others multiplied were nowhere near 260 grams either
Drought is a weather condition. true or false
Answer:
true
Explanation:
drought is a period of unusually persistent dry weather that persists long enough to cause serious problems such as crop damage and/or water supply shortages. The severity of the drought depends upon the degree of moisture deficiency, the duration, and the size of the affected area.
How much energy is released when 6.0 g of water is condensed from water to vapor?
Answer:6.0g x 1 mol/18.02g x 40,65 kJ/mol
Explanation: just did the quiz
13.6 kilojoules (kJ) of energy is released when 6.0 g of water is condensed from water to vapor.
To calculate the energy released when 6.0 grams of water is condensed from water to vapor, we need to use the concept of heat of vaporization (also known as enthalpy of vaporization). The heat of vaporization is the amount of energy required to change one gram of a liquid into vapor at its boiling point, without any change in temperature.
The heat of vaporization of water is approximately 40.7 kJ/mol at its boiling point (100°C or 373.15 K). We can use this information to calculate the energy released when 6.0 grams of water is condensed.
Step 1: Calculate the number of moles of water (H₂O) in 6.0 grams.
Molar mass of water (H₂O) = 2 g/mol (for hydrogen) + 16 g/mol (for oxygen) = 18 g/mol
Number of moles of water = Mass of water / Molar mass of water
Number of moles of water = 6.0 g / 18 g/mol = 0.333 moles
Step 2: Calculate the energy released during condensation.
Energy released = Number of moles of water × Heat of vaporization
Energy released = 0.333 moles × 40.7 kJ/mol = 13.6 kJ
Therefore, approximately 13.6 kilojoules (kJ) of energy are released when 6.0 grams of water is condensed from water to vapor.
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__M+__Q2----->___MQ3
Answer: 2M + 3Q2 -----> 2MQ3
Explanation:
2 Ms either side, and 6 Qs either side
Which of the following movements of ocean water has the greatest direct effect on the growth of producers.
A. Upwelling
B. Deep Current
C. Surface Current
D. Convection Current
Answer:
A- Upwelling
Explanation:
A car with a mass of 3,500lbs accelerates negatively from 35m/s to 8m/s in 8s. What is the
car's negative acceleration?
Answer:
[tex]a=-3.37\ m/s^2[/tex]
Explanation:
Given that,
A car accelerates negatively from 35m/s to 8m/s in 8s.
We need to find the car's acceleration.
Initial speed, u = 35 m/s
Final speed, v = 8 m/s
Time, t = 8 s
The acceleration of an object is equal to the rate of change of velocity. So,
[tex]a=\dfrac{v-u}{t}[/tex]
Put all the values,
[tex]a=\dfrac{8-35}{8}\\\\a=-3.37\ m/s^2[/tex]
So, the acceleration of the car is equal to [tex]-3.37\ m/s^2[/tex].
2. An atom of Be has four protons, five neutrons and four electrons. What 10 poin
is the mas of Be? *
O a.4
b. 5
c. 1
09
Answer:
Five ( 5 ) is the correct answer
Why might an organism have more than one arrow coming from them in the food web
N sub 2 +3H sub 2 rightwards arrow 2NH sub If 6 liters of hydrogen gas are used, how many liters of nitrogen gas will be needed for the above reaction at STP
Answer:
2L of nitrogen gas will be needed
Explanation:
Based on the following reaction:
N₂ + 3H₂ → 2NH₃
1 mole of nitrogen reacts with 3 moles of hydrogen to produce 2 moles of ammonia.
If 6L of hydrogen (In a gas, the volume is directly proportional to the moles, Avogadro's law) react, the volume of nitrogen gas required will be:
6L H₂ * (1mol N₂ / 3 moles H₂) =
2L of nitrogen gas will be neededWhich substances are compounds? Please help
Answer:
1 and 3
Explanation:
oh this one lol,, hope it helps
Answer:
1 and 3
Explanation:
hope this helps :)
If the speed of a wave is 150 m/s and its frequency is 2 Hz, what is its wavelength?
A. 300m
B. 75m
C. 152m
D. 148m
Answer:
75m
Explanation:
Determine the oxidation number of the element "X" in H2XO4.
If you have a car that gets 30 miles to the gallon and fuel currently costs $2.60 a gallon, how many miles can you drive if you have 5$ worth of fuel?
Answer:
57.7 miles.
Explanation:
Hello there!
In this case, according to the given information, it is possible to set up the initial miles-cost ratio as shown below:
[tex]\frac{30mi}{\$2.60}[/tex]
Thus, we can find the the driven miles with $5 by multiplying as follows:
[tex]\frac{30mi}{\$2.60} *\$5\\\\=57.7mi[/tex]
Best regards!
The miles' the car can run with the fuel cost $5 has been 57.69 miles.
The given car run for a 30 miles by 1 gallon of the fuel. The given cost of fuel has been $2.60. Thus, for 30 miles, the cost of fuel has been driven to be $2.60.
The miles that can be driven by the car with $5 has been given by unitary method. The expression has been driven as:
[tex]\$2.60=30\;\rm miles\\\$5=\dfrac{30}{2.60}\;\times\;5\;miles\\\$5=57.69\;miles[/tex]
The miles' the car can run with the fuel cost $5 has been 57.69 miles.
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The shoes are green, a size 8, have white laces, made out of cotton, and have a rubber sole. The description given is a list of ___________ properities of the shoes. Question 33 options:
chemical
mechanical
physical
structural
Answer:
Physical i think, because it says, "The shoes are green, made of cotton, and rubber sole" everything in the passage described a physical property
Explanation:
tell me if im wrong, good luck
Answer:
physical
Explanation:
its listing a size 8, which eliminates chemical and mechanical. Also it lists their green, which eliminates structural, leaving physical left
help pls pls pls I really need this answer
Answer:
I never did this but i think its d 37.5٪ lmk if i got it right pls and srry if i didnt
An unknown mass of Al absorbs 187.9 J of heat and increases its temperature from 23.5 °C to 35.6 °C. What is the mass of the
aluminum?
Where:
Specific Heat of Aluminum is = 0.900 J/gºC
Answer:
mass = 17.2 grams
Explanation:
q = mcΔT => m = q/cΔT = 187j / (0.90j/g°C)(35.6°C - 23.5°C) = 17.2g
You need 267 mL of .25M NaCl,
but the only supply of NaCl you
have
is 1.75M NaCl. How do you prepare
the required solution?
To prepare 267 mL of 0.25M NaCl, we need to take 38.29 mL of 1.75M NaCl solution and add water to it until it makes the final volume up to 267 mL.
We need to prepare the solution of 0.25 M NaCl using 1.75 M NaCl solution, we can use the dilution formula:
[tex]C_1V_1 = C_2V_2[/tex]
where [tex]C_1[/tex], [tex]V_1[/tex] is the concentration and the volume of the initial solution, [tex]C_2[/tex], [tex]V_2[/tex] is the concentration and the volume of the final solution.
We know the final concentration and the final volume that we are required to make. So we can use the above relation to find [tex]V_1[/tex] of the solution:
[tex]V_1 = (C_2 * V_2) / C_1[/tex]
Now after substituting the values in the relation, we get:
[tex]V_1 = (0.25 M x 267 mL) / 1.75 M\\V_1 = 0.03829 L or 38.29 mL[/tex]
So to prepare 267 mL of 0.25M NaCl, we need to take 38.29 mL of 1.75M NaCl solution and add water to it until it makes the final volume up to 267 mL.
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How is the motion of particles in a book different from the motion of particles in the air around it ? (dont put link)
Answer:
the motion is different.
Explanation:
the the motion is different because the particle in a book is solid particles and solid are packed together so so they can't move freely but while the the particles in the air around it is gas particles and it are packed very loose and can move very easily anywhere like .Example - solid-book , eraser. gas-helium, oxygen.
what do atom, molecules, and elements have in common
Answer:
Solids, liquids, gases - all matter - are made up of atoms (or other things, like molecules, that are made from atoms)! ELEMENTS are the kinds of atoms that we can have. Carbon is an element, hydrogen is an element, and so is oxygen. ... Atoms can join together - they form bonds together - to make MOLECULES.
How can a chemical reaction be sped up? Select from the drop-down menu to correctly complete the statement. Add a Choose... that is unaffected by a reaction. the choices are, A: catalyst B: coefficient C: product
Answer:
A: catalyst
Explanation:
In Chemistry, the rate of reaction of chemical elements (reactants) can be sped to produce a chemical compound or elements (products), through the addition of a catalyst that is unaffected by the reaction.
This ultimately implies that, to speed up a chemical reaction, add a catalyst that is unaffected by a reaction.
For example, an enzyme refers to a biological catalyst that is typically used to speed up (accelerate) the rate of a chemical reaction by lowering the activation energy of its reactants.
An enzyme can be defined as a biological catalyst that typically lowers the activation energy of a biological reaction. When the activation energy of a reaction is low, the rate of the reaction would be faster. Therefore, an enzyme speeds or catalyzes the rate of a reaction by lowering its activation energy.
Generally, an increase in temperature increases or speeds up the rate of a reaction while low temperature limits or reduces the rate of a reaction. The optimal temperature for enzymes in the human body is around 37 degrees celsius.
Plz help I need help plz ASAP
6:c
7: might be ice but im not really sure, hope you do well.
Explanation:
Which reaction type is really part of another type of reaction but treated separately? Explain
Answer:
Oxidation - reduction reaction which is called redox reaction.
Explanation:
The type of reaction that is a part of another type but treated separately is called Oxidation - reduction reaction.
Thus is because they usually involve 2 separate half reactions which are oxidation reactions that involve loss of electrons and then reduction equations which involve gain of electrons.
They are treated separately for example when sodium reacts with chlorine to form sodium chloride.
2Na + Cl2 = 2NaCl
Now, sodium undergoes oxidation by loosing elctrons and it's half reaction is;
2Na → 2Na^(+) + 2e^(-)
Meanwhile chlorine undergoes reduction by gaining electrons and its half reaction is;
Cl2 + 2e^(-) → 2Cl^(-)
why is the volume of hydrogen is doubled the volume of oxygen in electrolysis of water?
Explanation:
As you can that water splits into molecules of hydrogen and 1 molecules of oxygen since , number of molecules of hydrogen released is double the number of molecules of oxygen released, volume occupied by hydrogen gas is double the volume occupied by oxygen gas
Which applies to fusion? Check all that apply.
involves the splitting of nuclei
takes place in the Sun
releases radiation as a waste product
occurs in nuclear power plants and is used to generate electricity
plays a role in the production of essentially all elements heavier than helium
releases large amounts of energy
Answer: B, E, and F
Explanation: It showed the correct answer after i got it incorrect. (E2021)
Answer:
A
B
D
E
Explanation:
GOT IT RIGHT ON MY ASSIGNMENT
Compound Q decolorizes bromine water. Compound Q has two carbon atoms in each molecule. Which statement about compound Q is correct?
a) It contains carbon-hydrogen double bonds.
b) It has six hydrogen atoms per molecule.
c) It has two carbon-carbon double bonds.
d) It is produced by cracking alkanes.
The statement " It has two carbon-carbon double bonds" is correct. because Q is a kind of unsaturated hydrocarbon.
What is unsaturated hydrocarbon?
The type of compound which contain double bond or triple bond can be considered as unsaturated hydrocarbon. Unsaturated hydrocarbon can decolorized bromine water.
Two kinds of unsaturated hydrocarbon will obtain, alkene and alkyne.
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pls help will give 20 points and brainliest!!! im desperate!!
The line starts at the bottom because it's the starting point. (You have to start somewhere, If that makes sense.)
I also noticed that the line is going up, which means she's going farther (in distance and time)
The line is straight which means she's going constant speed.The muscle that pumps blood throughout your body is:
Cardiac muscle
Valentine muscle
Skeletal muscle
Smooth muscle
Answer:
cardiac
Explanation:
Food chains always begin with what type of organism? Why?
please help me with the definition of
activation energy
effective collisions
ineffective collisions.
please
Answer:
activation energy
the minimum quantity of energy which the reacting species must possess in order to undergo a specified reaction.
effective collisions
An effective collision is defined as one in which molecules collide with sufficient energy and proper orientation, so that a reaction occurs.
ineffective collisions
An ineffective collision (A) is one that does not result in product formation. An effective collision (B) is one in which chemical bonds are broken and a product is formed.