A pitcher threw a baseball straight up at 35.8 meters per second. What was the ball’s velocity after
2.50 seconds? (Note that, although the baseball is still climbing, gravity is accelerating it downward.)
Answer:
9.8
Explanation:
A product's price will increase the most if:
A. its supply and demand both fall at the same rate.
B. its supply declines while its demand goes up.
C. its demand remains the same but its supply goes up.
D. its supply remains
the same but its demand goes down.
1. waves that use matter to transfer energy
2. rhythmic disturbance that carries
energy
3. waves in which matter in the medium
moves in the same direction as the wave
4. example of a compressional wave
5. example of a mechanical wave
6. The matter in the medium moves up
and down or back and forth at right
angles to the direction the wave travels.
7. waves that do not require matter
to carry energy
8. ripples on the surface of a pond
9.the matter though which a mechanical wave travels
10.vibration of vocal chords creates this
Definitions: a. Water wave
b. Compressional waves
c. Transverse wave
d. wave
e.mechanical wave
f. electromagnetic wave
g. Sound wave
h. medium
Please match all the terms in the right spot and btw you will be able to use the same term more then once’s
Answer:
1. e
2. d
3. b
4. g
5. g, a both work
6. c
7. f
8. a, d both work
9. h
10. g
Explanation:
What is the molarity of a solution with a 10.0 g AgNO3 dissolved in 0.5 L of solution ?
please help as soon as possible!
Answer:
1st one
Explanation:
Answer:
B
Explanation:
chlorine 2×3= 6 not sure
True or False: Different substances, like shortening and soap, will melt at the same temperature. True False
Answer:
false
Explanation:
different things will have different melting points
6) What causes the stars to give off light when ignited?
Answer:
When fireworks explode in the sky, the gunpowder reactions create a lot of heat, causing the metallic substances pres- ent in the stars to absorb energy from the heat and emit light. ... These electrons absorb energy from the heat, which causes them to move from their original ground-energy state to an excited state.
Explanation:
:))
The process which generates energy in sun and other stars is nuclear fusion. The emission of light energy is thus the result of fusion reaction taking place in stars.
What is nuclear fusion?Nuclear fusion is a chemical process in which two light nuclei or isotopes of an atom fuse together to form a heavy nuclei with the release of million tons of energy.
The process in which a heavy atom breaks into lighter atoms is called nuclear fusion and it is also releasing massive energy but less than the from fusion because, the breaking of chemical bonds needs some energy to absorb.
Fusing two chemical bonds is needs no more energy and it is an energy releasing process. Millions of hydrogen atoms and its isotopes fuse together in several steps and form helium atoms.
This process of release million tons of heat energy and light energy. This will make the stars glow.
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Assuming a constant temperature, which sample below would you expect to be at
the highest pressure?
A
B
С
ОА
B
Ос
Answer:
The answer is C
Explanation:
This is pretty obvious, considering. Since they all are the same temperature and have the same amount of molecules, the place with the smallest amount of space has the highest amount of pressure. Because there is so little space, there is so much more pressure.
Plz help guys ASAP!
Thanks in advance
Answer:
3.6 moles
Explanation:
The balanced equation for the reaction is given below:
N₂ + 3H₂ —> 2NH₃
From the balanced equation above,
1 mole of N₂ reacted with 3 moles of H₂ to produce 2 moles NH₃.
Next, we shall determine the limiting reactant. This can be obtained as follow:
From the balanced equation above,
1 mole of N₂ reacted with 3 moles of H₂.
Therefore, 3.2 moles of N₂ will react with = 3.2 × 3 = 9.6 moles of H₂.
From the calculation made above, we can see that it will take a higher amount (i.e 9.6 moles) of H₂ than what was given (i.e 5.4 moles) to react completely with 3.2 moles of N₂.
Therefore, H₂ is the limiting reactant and N₂ is the excess reactant.
Finally, we the greatest quantity of ammonia, NH₃ produced from the reaction.
In this case, the limiting reactant will be use because all of it is consumed in the reaction.
The limiting reactant is H₂ and greatest quantity of ammonia, NH₃ produced can be obtained as follow:
From the balanced equation above,
3 moles of H₂ reacted to produce 2 moles NH₃.
Therefore, 5.4 of H₂ will react to produce = (5.4 × 2)/3 = 3.6 moles of NH₃
Thus, the greatest quantity of ammonia, NH₃ produced from the reaction is 3.6 moles
How many moles of solute are present in a sodium chloride solution with a total
volume of 1.25 L if the solutions known concentration is 0.330 M?
3.788 mol NaCl
0.264 mol NaCl
1.58 mol NaCl
24.14 mol NaCl
0.413 mol Naci
Answer:
n = 0.413moles (3 sig-figs).
Explanation:
From definition of molarity, solve for moles and substitute given data.
Molarity(M) = Moles Solute(n)/Volume of Solution in Liters(V)
M = n/V => n = M·V => 0.330moles/Liter x 1.25Liters = 0.4125moles ≅ 0.413moles (3 sig-figs).
Which type of molecule is shown below?
The type of molecule is to be considered as the option a. Alkyne. And, the same is to be considered.
What is alkyne?In terms of the chemical compound, Alkynes refer to Molecules which comprise of the triple bond that arise between 2 carbon atoms.
Also, the triple bond should be made up of one σ bond and two π bonds.
hence, The type of molecule is to be considered as the option a. Alkyne. And, the same is to be considered.
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4 Which pair of ions is isoelectronic?
A Ca2+ and 02-
B Na+ and 02-
OC Lit and Cl-
OD Mg2+ and CI-
Answer:
B. Na+ and O2-
Explanation:
Na+ plus has 10 electrons and O2- also has 10 electrons
Which is not an example of chemistry research in the field of energy?
a. producing hook-and-loop tape
b. developing rechargeable batteries
c. determining the usefulness of oil from soybean plants
d. studying the effects of insulation
Answer:
A.producing hook-and-loop tape
Explanation:
hope it's help..
Answer:
A) producing hook-and-loop tape
Explanation:
Does anyone know if this is correct?
Answer:
try 76.35 or d didi in the back of the STREETS of the city girls are the same time as hell
How would adding the catalyst nitrogen monoxide (NO) affect this reaction?
2SO2(g) + O2(g) → 2SO3(g)
A.
NO increases the rate at which SO3 molecules are formed.
B.
NO reacts with SO3 to produce more SO2 molecules.
C.
NO decreases collisions between the SO2 and O2 molecules.
D.
NO increases the concentration of the SO2 and O2 molecules.
E.
NO increases the activation energy of the SO2 and O2 molecules
Answer:
C
Explanation:
Answer: A. NO increases the rate at which SO3 molecules are formed.
Explanation: I got this right on Edmentum.
What is the percent composition of CaSO4 • 2H2O? Please show steps
Answer:
21 =33
Explanation:
What are 2 facts about neon
What is the percent by mass (mv) of a solution with 1.56 g of benzene dissolved in gasoline to make 998.44 mL of solution? (density of gasoline = 0.7489 g/mL)
please I need help lol
Answer:
The percentage by mass of benzene in the solution is approximately 0.2%
Explanation:
The given parameters are;
The mass of the benzene solute dissolved in the gasoline solvent, m₁ = 1.56 g
The total volume of the benzene gasoline solution made, V = 998.44 mL
The density of gasoline, ρ = 0.7489 g/mL
Mass, m = Density, ρ × Volume, V
∴ The mass of gasoline in the 998.44 mL, solution = 0.7489 g/mL × 998.44 mL = 747.731716 g
The total mass of the solution = The mass of the benzene in the solution + The mass of the gasoline in the solution
∴ The total mass of the solution = 747.731716 g + 1.5 g = 749.231716 g
[tex]The \ percentage \ by \ mass = \dfrac{The \ mass \ of \ a \ fraction}{(The \ mass \ of \ the \ total \ solution)} \times 100[/tex]
The percentage by mass of benzene in the solution = (1.5 g/749.231716 g)×100 ≈ 0.2% by mass.
Consider the following representation of a reaction mechanism.
Step 1: A+A → C+E (slow)
Step 2: E + B → A+D (fast)
Overall reaction: A + B → C + D
What should appear in the rate law for the reaction above?
A) only A and B because they are reactants in the overall reaction
B) only C and C because they are products in the overall reaction
C) only A because it is the reactant in the rate-determining step
D) only E and B because they are the reactants in the rate-determining step
Answer:
The rate determining step is step 1
Explanation:
In the rate law for the given reaction,
only A appears because it is the reactant in the rate-determining step.So, option C is correct one.
Which step is rate determining steps?The slowest steps is rate determining step of the reaction.It is because in rate determining step the intermediate is formed.What is intermediate ?The short lived species formed in the mechanism of reaction is called intermediate.The intermediates is formed in slowest step because it is unstable species.What is rate law for the reaction?The rate law is also known as rate equationIt is the expression that provides relationship between rate and concentration of the reaction in a chemical reaction.The rate law is determined by the experimentally.If the reaction occurs in multi steps then the rate of the reaction is depends upon slowest step of the reaction.learn about rate law,
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Which is the mass of 0.13 moles of potassium chloride, KCl
Answer:
9.69 grams
Explanation:
e
Answer:
9.69g KCl
Explanation:
[tex]0.13 molesKCl\frac{74.55gKCl}{1moleKCl} =9.69gKCl[/tex]
When an atom of oxygen (O) forms an anion by gaining two electrons, what is the anion’s charge?
Answer:
Oxygen has an electron arrangement of (2, 6) and needs to gain two electrons to fill the n=2 energy level and achieve an octet of electrons in the outermost shell. The oxide ion will have a charge of 2− as a result of gaining two electrons
How many neutrons does calcium have?
.20. 60. 79. 40
Answer:
20
Explanation:
Atomic number/proton number = 20 (protons in nucleus)
Atomic mass number = 40 (protons + neutrons in nucleus)
40 - 20 = 20
PLEASE HELP
which subatomic particle identifies the element?
A. atomic mass
B. neutrons
C. protons
D. electrons
Answer:
C. The Protons
Answer:
The Answer is Protons C.
Explanation:
Its quite simple, u see, according to my calculations its c.
HELP IS IT:
A.
Model 2 is an isotope; Model 3 is an ion
B.
Model 1 is an ion; Model 3 is an isotope
C.
Model 1 is an isotope; Model 2 is an ion
D.
Model 1 is an ion; Model 2 is an isotope
Answer:
i thjink its b
Explanation:
PLEASE HELP
I WILL GIVE BRAINLIEST
10 points
What is the molar mass of argon?
Answer:
39.948 u
Explanation:
Are humans more similar to trees or bacteria? How do you know?(1 point)
A
Humans are more similar to bacteria because trees cannot move around their environment.
B
Humans are more similar to trees because bacteria are too small to see.
C
Humans are not similar to trees or bacteria. Humans are a special species that is not related to any other species on Earth.
D
Humans are more similar to trees because all plants and animals are part of the same domain.
Answer:
Humans and trees are interdependent - we breathe in oxygen and breathe out carbon dioxide, while trees take in carbon dioxide and release oxygen.
Humans have about a thousand genes similar to those of bacteria, presumably because the genes are so vital that their DNA structure has remained much the same over millions of years of descent from a common ancestor.
Explanation:
Why is balance important in organisms?
__BaF2+__Na2S-->__BaS2+__NaF
Answer:
The reaction can't be balanced
Explanation:
To solve the chemical reaction:
_BaF₂ + _Na₂S → _BaS₂ + _NaF
We will use the algebraic method:
XBaF₂ + YNa₂S → ZBaS₂ + WNaF
Ba = X = Z
F = X/2 = W
Na = Y/2 = W
S = Y = Z/2
From the equations of F and Na:
X= Y
But from Ba and S equations:
X = 2Y
As both equations are inconsistent:
The reaction can't be balanced
Calculate the reaction rate given the following:
After 2 minutes (120 seconds), the concentration of a product was measured to
increase from 0.0012 M to 1.48 M.
1.48 M/s
0.0123 M/s
0.0012 M/s
-0.0123 M/s
Answer:
0.0123 M/s
Explanation:
The reaction rate is the rate at which the reaction takes place and results in an increased concentration of the products. The rate of the reaction is 0.0123 M/s.
What is the reaction rate?
The reaction rate is the increase of the concentration of the product with respect to time in seconds. The rate of reaction is given by,
[tex]\rm rate = \rm \dfrac {\Delta C}{\Delta t}[/tex]
Given,
Change in product concentration = 1.478
Time period = 120 seconds
Substituting values in the above equation:
[tex]\begin{aligned} \rm rate &= \rm \dfrac {\Delta C}{\Delta t}\\\\& = \dfrac{1.478}{120}\\\\&= 0.0123 \end{aligned}[/tex]
Therefore, option B. 0.0123 M/s is the reaction rate.
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