_____increases when a ball bounces up and decreases as ball does down. Answers choices. A.Thermal Energy. B. Kinetic Energy. C. Potential Energy. D. Heat
Answer:
C. potential energy
Explanation:
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Question 1
1 pts
Where did most of the heat of the Earth come from at its formation?
O Seismic waves
O Radioactive decay
O Planetesimals crashing into each other
Peridotite xenoliths
Question 2
1 pts
Answer:
radioactive decay
Explanation:
a study reveals that only about half of our planets internal heat stems from natural radioactivity the rest is primordial heat left over from when earth first coalesced from a hot ball of gas dust and other material
HELP ME DUE IN 5 MINUTES I WILL GIVE BRAINLIEST
Most people understand that resources need to be conserved. For example, when brushing your teeth, you conserve water by turning it off until you need it again. Energy within a system follows the Law of Conservation of Energy, so what does the Law of Conservation of Energy mean?
Group of answer choices
Energy can be transformed and destroyed.
Energy cannot be destroyed or created.
Energy cannot be transferred or used up.
Energy can be lost or made.
Answer:
Energy cannot be destroyed or created.
C. i know this is right
Explanation:
How much heat is necessary to vaporize 685 g of H20 at 100°C? The heat of vaporization
of H2O is 540 cal/g.
0 370,000 cal
O 1.22 x 103 cal
O 88,400 cal
01.27 kcal
h
Question 8
3.33 pts
Answer:
370,000 cal
Explanation:
Step 1: Given data
Mass of water (m): 685 gHeat of vaporization of water (ΔH°vap): 540 cal/gStep 2: Calculate the heat necessary to vaporize 685 g of water
Vaporization is the process in which a liquid converts to a gas, at a constant temperature. The heat required (Q) is:
Q = ΔH°vap × m
Q = 540 cal/g × 685 g
Q = 3.70 × 10⁵ cal
An elemental metal contains how many types of atoms?
a. 1
b. 2
c. 3
d. 4
Answer:
a
Explanation:
all elemental metals are made up of only one type of element
Answer:
It is 1.
Explanation:
For the reaction below, if the rate of appearance of Br2 is 0.180 M/s, what is the rate of disappearance of
NOBr?
2 NOBr(g) → 2 NO(g) + Br2(g)
a. –0.360 M/s
b. –0.090 M/s
c. 0.090 M/s
d. 0.180 M/s
e. 0.720 M/s
Answer:
–0.360 M/s
Explanation:
To create an image, the lens of an eye ________
focuses light on the cornea
reflects light away from the retina
bends the cornea to correct vision
focuses light on the retina
Answer:
focuses light on the retina
Explanation:
it was believed that earth was a stationary object at the center of the universe all other objects in space without to go around earth which of these is a criticism of this idea
Answer: is that a question or
Explanation:
Answer:
its c
Explanation:
how can use a BIPHASIC LIQUIDS
Answer:
BIPHASIC LIQUIDS are used ear cleaning, to softening the wax so that mild infections can be treated.
Explanation:
BIPHASIC LIQUIDS are liquids that contain two immiscible phases, one is suspension and the other is emulsion. In suspension, the finely solid are dispersed in a liquid or semi solidwhich is use for medicament
The emulsion consist of immiscible liquids, one is dispersed in globules.
They are used ear cleaning, to softening the wax so that mild infections can be treated.
1.86 g of ethanol reacts with 10.0 g of oxygen. What is the total volume of gas present (in L) after the reaction is complete, assuming the reaction takes place at 1.00 atm and 25oC?
Answer:
See explanation
Explanation:
The equation of the reaction is;
C 2 H 6 O(l) + 3 O 2 (g) → 2 CO 2 ( g ) + 3 H 2 O(l )
Next we have to determine the limiting reactant, this reactant gives the least number of moles of product.
Number of moles of C 2 H 6 O = mass/molar mass = 1.86g/ 46.07 g/mol = 0.04 mols
From the equation;
1 mol of ethanol yields 2 mols of CO2
0.04 moles of ethanol yields 0.04 * 2/1 = 0.08 mols of CO2
For water;
1 mol of ethanol yields 3 mols of water
0.04 moles of ethanol yields 3 * 0.04/1 = 0.12 mols of water
Also;
Number of moles of oxygen= 10g/32g/mol = 0.31 moles
3mols of O2 yields 2 moles of CO2
0.31 moles of O2 yields 0.31 * 2/3 = 0.21 moles of CO2
For water;
3 moles of O2 yields 3 moles of water
0.31 moles of O2 yields 0.31 * 3/3 = 0.31 moles of water
Hence ethanol is the limiting reactant.
From PV=nRT
Volume of CO2 is;
V = nRT/P
V = 0.08 * 0.082 *298/1 = 1.95 L
Volume of water;
V = nRT/P
V= 0.12 * 0.082 * 298/1
V= 2.93 L
Total volume of gases after reaction = 1.95 L + 2.93 L = 4.88 L
Could someone pls help me :)
liquid 1 and 2 have the same color and mass so the answer would be liquid 1 and 2
Explanation:
hope this is helpful
If 35.0 g of aluminum changes temperature by 84.0℃, how much heat was absorbed? specific heat of Al = 0.910 J/g℃
40567⁰ kkkkkkkkkkkkkkkkkkkkkkmeow
Explanation:
cuz I got a 100
velocity is a ______ quantity
Answer:
vector quantity
Explanation: Brainliest pls
true or false A force can change the shape of an object.
Answer:
True
Explanation:
When a force acts on an object, the object may change shape by bending, stretching or compressing - or a combination of all three shape changes.
How many oxygen atoms are there in one formula of AI2(SO4)3?
There are 12 atoms of Oxygen, since 3 times 4 is 12.
Please mark brainliest!
5x10-6 mol Na2C2O4 bileşiğinde kaç tane O atomu vardır?
How many oxygen atoms are present in 5x10-6 mol Na2C2O4 ?
There are 1.204 x 10¹⁹ atoms O
Further explanationThe empirical formula is the smallest comparison of atoms of compound forming elements.
A molecular formula is a formula that shows the number of atomic elements that make up a compound.
1 mol of molecule Na₂C₂O₄ :
There are 4 mol of O in 1 mol of molecule Na₂C₂O₄
So for 5 x 10⁻⁶ mol Na₂C₂O₄ :
[tex]\tt mol~O=4\times 5.10^{-6}=2.10^{-5}[/tex]
1 mole = 6.02.10²³ particles , so number of atoms O :
[tex]\tt 2\times 10^{-5}\times 6.02\times 10^{23}=1.204\times 10^{19}[/tex]
The percent ionization of a 0.350 M HC,H,O2 solution. Ka(HC2H302)
Answer:
The answer is 56
Explanation:
i need points
Atoms of the same element can have different properties. ( true or false )
Answer:
Atoms of the same element have the same chemical properties. The only differences between atoms of the same element are the number of neutrons in the nucleus and the atomic weight of each isotope. false
Answer:
False
Explanation:
Different elements can have different properties, but not atoms of the same element
when coal goes through combustion it releases nitrogen and sulpur into the air in the form of what
Answer:
Over time, the plant matter transforms from moist, low-carbon peat, to coal, All types of coal also contain sulfur, which, when burned, releases toxic air pollution. Sulfur All this coal comes from mines, which are either underground or run on diesel—a major source of air toxins, nitrogen oxide, and soot.
Question 1 (3 points)
(01.01 LC)
Which of the following objects will exert the greatest gravitational force on a box, if the distance between them remains the same? (3 points)
Оа
2 kg mass
Ob
4 kg mass
Ос
6 kg mass
8 kg mass
The following objects will exert the greatest gravitational force on a box⇒ 8 kg mass
Further explanationGravity is a force that arises because of the attraction between objects with mass.
The magnitude of this attraction is proportional to the mass of the object.
The greater the mass of the object, the greater the gravitational force
Relationships can both be stated in
Newton's Gravity Law:
[tex]\rm F=G.\dfrac{m_1.m_2}{r^2}[/tex]
with F = gravitational force,
G = gravitational constant,
m1, m2 = mass of object,
r = distance between two objects.
The distance-r and mass of the box(m₁) are the same, then the largest object's mass (m₂)exerts a large gravitational force, because the gravitational force is directly proportional to the mass of the two objects
3. Using the solubility of ionic compounds table and/or the solubility rules,
list 3 substances that will NOT form a solution with water? (Hint:
identify substances that are insoluble with water)
In the acetylene torch, acetylene gas (C2H2)(C2H2) burns in oxygen to produce carbon dioxide, water, and energy: 2C2H2(g)+5O2(g)⟶Δ4CO2(g)+2H2O(g)2C2H2(g)+5O2(g)⟶Δ4CO2(g)+2H2O(g) You may want to reference (Pages 241 - 243) Section 7.7 while completing this problem. Part A How many moles of O2O2 are needed to react with 1.85 molmol of C2H2C2H2? Express your answer to three significant figures and include the appropriate units. nn(O2O2) = nothingnothing SubmitRequest Answer
Answer:
4.63 mol
Explanation:
Step 1: Write the balanced complete combustion reaction of acetylene
2 C₂H₂(g) + 5 O₂(g) ⟶ 4 CO₂(g) + 2 H₂O(g)
Step 2: Establish the appropriate molar ratio
According to the balanced equation, the molar ratio of C₂H₂ to O₂ is 2:5.
Step 3: Calculate the number of moles of O₂ needed to react with 1.85 moles of C₂H₂
We will use the stoichiometric molar ratio.
1.85 mol C₂H₂ × (5 mol O₂/2 mol C₂H₂) = 4.63 mol O₂
Q 16.1: Select the first step in the Wittig reaction. A : The alkyltriphenylphosphonium halide is deprotonated by a base to make a phosphorus ylide. B : The phosphorus ylide reacts with the aldehyde or ketone to make an oxaphosphetane. C : Triphenylphosphine attacks the alkyl halide to produce an alkyltriphenylphosphonium halide. D : The oxaphosphetane decomposes to form the alkene and triphenylphosphine oxide.
Answer:
The phosphorus ylide reacts with the aldehyde or ketone to make an oxaphosphetane.
Explanation:
The Wittig reaction is a reaction that occurs between a phosphorus ylide and an aldehyde or ketone. The final products are an alkene and triphenyl phosphine oxide.
The first step in the reaction is the attack of the phosphorus ylide on the aldehyde or ketone. This is followed by attack of oxygen on phosphorus to form a [2+2] cycloaddition product (oxaphosphetane) which decomposes to form the alkene and triphenylphosphine oxide.
Identify the reaction type shown and describe the clues
that were used to identify it.
NHạNO3 → Nz0 + 2H,0
3 Helppppp!!
Answer:
Decomposition reaction.
There's heating of solid Ammonium nitrate to form di nitrogen oxide and water
Determine the pH of a 2.0 x 10-2 M Sr(OH)2 solution.
pH of the Sr(OH)₂ solution : 12.6
Further explanationpH is the degree of acidity of a solution that depends on the concentration of H⁺ ions. The greater the value the more acidic the solution and the smaller the pH.
pH = - log [H⁺]
Sr (OH) ₂ solution is a base with valence 2, so we determine the pOH from the OH ion concentration - which is expressed by pOH = - log [OH -]. After that we determine the pH value from the relationship:
[H⁺] [OH⁻] = Kw=10⁻¹⁴
pH + pOH = 14
Sr(OH)₂⇒Sr²⁺+2OH⁻
From equation [Sr(OH)₂] : [OH⁻]=1 : 2, so [OH⁻]=
[tex]\tt [OH^-]=2\times 2.10^{-2}=4.10^{-2}~M[/tex]
[tex]\tt pOH=-log[OH^-]\\\\pOH=-log~4.10^{-2}\\\\pOH=2-log~4\rightarrow 1.398 \\\\pH+pOH=14\\\\pH=14-1.398\\\\pH=12.6[/tex]
pH is the measurement of the concentration of hydrogen or hydronium ion in an aqueous solution. The pH of strontium hydroxide is 12.6.
What is pH?The pH is the potential of hydrogen or the negative log of its concentration.
First, calculate the pOH of strontium hydroxide by:
[tex]\begin{aligned} \rm pOH &= \rm - log [OH ^{-}]\\\\&= \rm -log [4\times10^{-2}]\\\\&= 1.398\end{aligned}[/tex]
Now, calculate pH from pOH as:
[tex]\begin{aligned}\rm pH &= 14 - \rm pOH\\\\&= 14 - 1.398\\\\&= 12.6\end{aligned}[/tex]
Therefore, 12.6 is the pH of strontium hydroxide.
Learn more about pH here:
https://brainly.com/question/10725749
Balance the chemical equations.
1FeCl3 + KOH → Fe(OH)3 + KC1
Answer:
FeCl3 + 3KOH → Fe(OH)3 + 3KCl
Explanation:
I NEED TO KNOW THIS ASAP
Answer:
I think that the answers A, not 100% sure tho
Explanation:
Because the problem says "highly radioactive" chemicals and gamma rays are highly radioactive chemicals, and gamma rays are very penetrating to the human body
which 2 not one 2! hjmdnxhjund
Answer:
A and D then I guess
Explanation:
sorry hope this helps!
which force does the truck use to move the car with it A.push B.pull C.gravity D.Friction
it is push i think to move the car
Answer:
Either A. Push or B.Pull because the truck is either pushing or pulling the car to move it. So it depends on if it's pushing or pulling the car.
Explanation:
Suppose you wish to determine the order of the reaction. You initially measure a rate, r0, given some arbitrary concentration of reactants. You then proceed to double the amount of A in the reaction (keeping B the same) and find that the rate is now 2r0. In a reciprocal experiment, you double the amount of B (A same as initial) in the reaction and measure a rate of 8r0. What is the order of this reaction
Answer:
See explanation
Explanation:
Now taking A, we can see that if we double the amount of A while keeping the amount of B constant, the rate of reaction doubles, hence we can write;
2^n = 2^1
hence n =1
For B, when the amount of B is doubled while keeping the amount of A constant, the rate of reaction increases eight times. Hence we can write;
2^n = 8
2^n = 2^3
n=3
Hence this reaction has an overall order of 1 + 3 = 4
So we can write;
rate =k[A] [B]^3