Answer:
48 Joules
Explanation:
Givens
m = 1.5kg
v = 8.0 m/s
Formula
KE = 1/2 m v^2
Solution
KE = 1/2 * 1.5 * 8.0^2
KE = 1/2 * 1.5 * 64
KE = 48 Joules
Which of the following reactions is NOT properly classified?
(A) Synthesis - MgO + CO2 → MgCO3
(8) Decomposition - 2 Fe(OH)3 → Fe2O3 + 3 H2O
(c) Combustion - CO2 + 2 H2O → CH4 + 2 02
(D) Synthesis – 2 Na + Cl2 → 2 NaCl
A 200.0 ml quantity of 0.9 M HCl was titrated with an NaOH solution to reach the equivalence point. The goal was to determine the concentration of the NaOH solution. if 23.9 ml if the NaOH solution was required, what was the [NaOH]???
Since the acid and base react in a one to one ratio, you can use the equation M1V1 = M2V2 to solve for M2, or the molarity of NaOH.
M1 = 0.9 M HCl
V1 = 200.0 mL HCl
M2 = ?
V2 = 23.9 mL NaOH
(0.9 M)(200.0 mL) = M2(23.9 mL) —> M2 = 7.53 M NaOH
Why are constellations and predictable locations in the night sky but planets are hard to find
Answer:
Because you can see the stars everynight pretty much, but the planets you need a telescope for. Plus, the planets are moving everynight making night and day so they all move! :)
Explanation:
Hope this helps! Brainliest plz?
50 points Use the drop-down menus to select the names of the labeled structures.
A:
B:
C:
D:
Answer:
A: PistilB: sepalC: petal
D:stamen
Answer:
Pistil
sepal
petal
stamen
How do the terms denature, catalyst, active site, and substrate relate to each other
Explanation:
The enzyme 's active site binds to the substrate. Increasing the temperature generally increases the rate of a reaction, but dramatic changes in temperature and pH can denature an enzyme, thereby abolishing its action as a catalyst. ... When an enzyme binds its substrate it forms an enzyme-substrate complex.
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the formula of copper sulfate crystals is CuSo4.5H2O. 400ml of 0.02mol/l copper (ii) sulfate solution is needed to be prepered .
a. calculate the molar mass of the solute .
b. calculate the mass of the solute that sould be weighted to prepare this solution .
c. describe in details the steps of preperation of the solution
Answer: a. 249.5 g/mol
b. 1.996 g
c. Measure 1.996 g of [tex]CuSO_4.5H_2O[/tex] and dissolve in water until the volume is 400 ml
Explanation:
Molar mass is the sum of atomic masses of all the elements present.
Thus molar mass of [tex]CuSO_4.5H_2O[/tex] = 1(63.5)+1(32)+4(16)+5(18) = 249.5 g/mol
Molarity of a solution is defined as the number of moles of solute dissolved per liter of the solution.
To calculate the number of moles for given molarity, we use the equation:
[tex]\text{Molarity of the solution}=\frac{\text{given mass of solute}\times 1000}{\text {Molar mass of solute}}\times \text{Volume of solution in ml}}[/tex]
[tex]0.02mol/L=\frac{x\times 1000}{249.5g/mol\times 400}[/tex]
[tex]x=1.996 g[/tex]
c. We need to measure 1.996 g of [tex]CuSO_4.5H_2O[/tex] and dissolve it in water to make the volume 400 ml.
Which statement gives two characteristics of all liquids?
They spread out to fill space and have atoms that vibrate in place.
They have atoms that vibrate in place and have a definite shape.
They will change shape to fit a container and have definite volume.
They have definite volume and have atoms that move freely in all directions.
Answer:
C
Explanation:
Describe particle movement in solid,liquid and gas
Answer:
In a solid, they're really close together and vibrate a LITTLE, in a liquid they're kinda close together but change movement because water will change shape depending on the container they're in. For gas they are spread far from each other and vibrate A LOT
Explanation:
Both males and female animals have special behaviors to increase their chance of sexual reproduction Give an example of one of these behaviors.
Please help!!!
Which statement about the manufacture of aluminium by electrolysis is correct?
А Aluminium ions are oxidised to aluminium by gaining electrons.
B Aluminium is extracted from its ore hematite. .
с Molten cryolite is used to dissolve the aluminium oxide.
D Oxygen is formed at the negative electrode.
Molten cryolite is used to dissolve the aluminum oxide is correct.
What is electrolysis?
Electrolysis is a process used to split molecules by passing an electric current through a solution containing ions. It works because the ions in the solution are attracted to the opposite charge of the electrodes in the electrolysis cell. The ions travel towards the electrodes and are either removed from the solution (oxidation) or released into it (reduction). This process is used in a variety of industries, such as metals refining, wastewater treatment, and electroplating.
The process of extracting aluminum from its ore, usually bauxite, involves electrolysis. In this process, the ore is dissolved in molten cryolite and an electric current is passed through it, leading to the oxidation of aluminum ions at the anode and the reduction of oxygen at the cathode. The aluminum is then extracted as a molten metal.
Therefore, option C is the correct answer.
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Can someone please help me with the gizmo please
message me if your willing to help :(
Answer:
airing Your GizmoWatch to the GizmoHub App 10. Register ... NOTE: If any component is missing, please contact the store ... Gizmo Buddies can text the GizmoWatch ... Tap Kids to access your child's full profile. If you have more than one child, swipe left or right to ... portable devices with LCD panels may be used to help.
Explanation:
Why is it necessary to maintain excess bromine in the reaction mixture with trans-cinnamic acid and bromine
Answer:
It is necessary because Trans-cinnamic is a limiting reagent in the mixture reaction while Bromine is the excess reagent
Explanation:
It is necessary to maintain excess bromine in the reaction mixture because Bromine is the excess reagent in the reaction mixture and if it's quantity is less it would consume the limiting reagent ( Trans-cinnamic ) completely . hence Bromine should maintain excess quantity in the reaction mixture
what does table salt mean
Salt suitable for sprinkling on food at meals.
How much heat would be needed to vaporize 450 g of silver?
Answer:
225
Explanation:
I hope it helps
How hot is magma?
27 points
Answer:
2200 degrees Fahrenheit
Explanation:
700°C to 1300C where's my points at
Nitrogen is an element. What is the smallest particle of nitrogen that has all the properties of nitrogen?
Answer:
The structure of the atom.
Explanation:
The correct answer is - The structure of the atom.
Reason -
An atom is the smallest unit of matter that retains all of the chemical properties of an element.
The rock in a particular iron ore deposit contains 78% Fe2O3 by mass. How many kilograms of the rock must a mining company process to obtain 1.0 x 103 kg of iron?
Answer:
103 so easy so free dogwater
Explanation:
Mass percentage does not have any unit as numerator and denominator contains the same unit. The mass of rock is 2.56×10⁶g when it contains 1.0 x 10³ kg of iron in it.
What is percentage by mass?Mass percentage represents the the percentage of each element that is making a particular compound.
Mathematically,
Percentage of mass = (component’s mass ÷ total mass) x 100%
Percentage of mass of ferric oxide is = 78% by mass in rock
From this we can interpret the following
100 g of rock contains = 78gram ferric oxide
(100÷78)g of rock contains= 1 gram of ferric oxide
mass of iron in rock =1.0 x 10³ kg = 1.0 x 10⁶ g
(100÷78)×1.0 x 10⁶ g of rock = 1.28×10⁶g of ferric oxide
now 1 mole of ferric oxide contains 2 atoms of iron, so the total mass of iron is 1.28×10⁶g ×2=2.56×10⁶g of iron.
Therefore the mass of rock is 2.56×10⁶g when it contains 1.0 x 10³ kg of iron in it.
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Here we see the valence shells of oxygen and magnesium.
How will the electrons react to make a stable product?
1 electron will move from oxygen to magnesium.
2 electrons will move from oxygen to magnesium.
1 electron will move from magnesium to oxygen.
2 electrons will move from magnesium to oxygen.
Answer:
2 electrons will move from magnesium to oxygen
Explanation:
Valence electrons have higher energy than the electrons in inner orbits, valence electrons participate in chemical reactions. A certain element's chemical characteristics can also be determined by the quantity of valence electrons that are present. The correct option is C.
What are valence electrons?The amount of electrons an atom must gain or lose in order to achieve the electrical configuration of the nearby noble gas or inert gas is known as valence. "Valence electrons" are described as "non-filled electrons in the outer shells."
The s and p electrons in the outermost shell are valence electrons. Core electrons are those found in the inner shell. Valence electrons are minuscule subatomic particles that we come across as we examine and investigate an element's atom. We can trace the valence electrons and forecast the sorts of bonds with the aid of Lewis structures.
'Mg' has two valence electrons and 'O' has six valence electrons. So 'Mg' loses its two electrons to 'O' to attain the octet.
Thus the correct option is C.
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what is the chemical formula for cuprous nitride
Answer:
Cu[NO(down arrow)3]^2
Explanation:
3 is a subscript and 2 is an exponent.
24) Which of these lists the order of sublevels by INCREASING energy? *
3d, 4s, 4p
4s, 3d, 4p
4p, 3d, 4s
4s, 4p, 3d
Answer:
4s, 3d, 4p
Explanation:
(3d,4s,4p) and (4p, 3d, 4s) both are decreasing energy, while (4s,4p,3d) is incorrect order it should be (4s,3d,4p).
The EPA sets national air-quality standards for common air pollutants. The
graph shows the change in the concentrations of these pollutants over time.
Which conclusion do the data in the graph support?
A Concentrations of all pollutants have decreased.
B. Monitoring concentrations of pollutants is too expensive.
O C. Concentrations of all pollutants have increased.
O D. Monitoring concentrations of pollutants has been ineffective.
Answer:
A
Explanation:
Just took the quiz
The irregularity of the chart means that, monitoring concentrations of pollutants has been ineffective.
What is the EPA?The EPA is the environmental protection agency which takes care of the set limits of pollutamts that are released into the environment. The chart shows the monitoring of the concentrations of pollutants over a period of time.
We can see tat the chart is so irregular. The irregularity of the chart means that, monitoring concentrations of pollutants has been ineffective.
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9. What is the atomic number of the atom in the diagram above?
Answer:
the atomic number of the atom can be determine through the number of protons in the nucleus
The protons are usually the atomic number.
I like a guy and my parents think he likes me but I don't know what to do, help me
Answer:
maybe try to tell him how you feel??
Explanation:
An unknown compound is found to have a molar mass of 392.16 g/mol. If the empirical formula is C2H5PF2, what is the molecular formula
Answer:
C8H20P4F8
Explanation:
Molecular formula is based off a ratio of the molecular formula's molar mass divided by the empirical formula's molar mass.
The molar mass of the empirical formula C2H5PF2 is 98.02g. We find this by adding the molar masses of all elements in the formula, multiplied by their subscripts.
2(12.01) + 5(1.01) + 30.97 + 2(18.99) = 98.02
We then divide the molecular molar mass by the empirical molar mass.
392.16/98.02 = 4
This tells us that the molecular formula has 4 times the mass of the empirical formula. Because mass comes from the elements in the formula, we multiply all the subscripts by 4 to get the molecular formula.
2x4 = 8
5x4 = 20
1x4 = 4
2x4 = 8
So the molecular formula is C8H20P4F8
List the number of protons, neutrons, and electrons in titanium
P-
N-
E-
Answer:
P- 22
N-26
E-22
Which of the following will dissolve most rapidly?
A) Sugar cubes in cold water
B) powdered sugar in hot water
C) powdered sugar in cold water
D) sugar cubes in hot water
Answer:
The correct answer to your Question is B.
Explanation:
Hope you have a great day :)
The substance from the options that will dissolve most rapidly is : ( B ) Powdered sugar in hot water.
Factors responsible for solubilityIncrease in temperature, state of solute and volume will determine the rate at which solubility occurs. The powdered sugar is in less solid state when compared to sugar cubes and therefore will dissolve most rapidly in hot water than a sugar cubes in hot water.
Hence we can conclude that The substance from the options that will dissolve most rapidly is : ( B ) Powdered sugar in hot water.
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If the hydrogen ion concentration, [H+], in a solution is 2.65 x 10-2 M, what is [OH-]?
Answer:
A
Explanation:
If the hydrogen ion concentration, [H+], in a solution is 2.65 x 10-2 M, then [OH-] will be 3.77x 10-13 M
What is hydrogen ion concentration?
Hydrogen ion concentration is the factor that determines the acidity of water.
Given,
[tex]H^+=2.65*10^-^2[/tex]
To find the concentration of [OH-].
It is known that,
[tex][H^+]*[OH^-]=1*10^-^1^4[/tex]
[tex]OH^-=\frac{1*10^-^1^4}{2.65*10^-^2}[/tex]
[tex]OH^-=3.77*10^-^1^3[/tex]
Thus, the correct answer is 3.77x 10-13 M.
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I have to create an energy transformation digital poster so if you have already done it show me yours or help me :(
In this assignment, you will research the relationship between different types of energy when energy is being transformed. You will present your findings in the form of bar graphs or pie charts that show the forms of energy at different times in the process.
Answer: Did you finish this poster?
its due today and i forgot all about it
Explanation: Ill pay on cashapp if anyone has this project
Answer:
I can help a little you can do the sun witch transfers energy to so many things
After one week there was a white solid but no liquid in the dish. What had happened to the water in the dish?
Answer:
it disappeared loll jk
it obviously dried
well you may Mark me as brainliest
This environment has a lot of trees high temperatures and high humidity all year long which environment is this describing
Answer:
Rainforest
Explanation:
rainforests tend to have high humidity, explaining why you always sweat there. and including high temps.