Answer:
[tex]T_2=98.5^{\circ}[/tex]
Explanation:
Given that,
The specific heat of water is 4.184Jg°C
Mass, m = 600 g
Initial temperature, T₁ = 75.5°C
We need to find the final temperature. We know that heat absorbed is given by :
[tex]Q=mc\Delta T\\\\Q=mc(T_2-T_1)\\\\\dfrac{Q}{mc}=(T_2-T_1)\\\\\\T_2=\dfrac{Q}{mc}+T_1\\\\T_2=\dfrac{5.9\times 10^4}{600\times 4.184}+75\\\\T_2=98.5^{\circ}[/tex]
So, the final temperature is equal to [tex]98.5^{\circ}[/tex].
If the speed of light is 3.0 × 108 m/s2, then how much energy would be released if a 23.7 gram object is converted to pure energy?
A. 2.133 x 10^15 J
B. 3.797 x 10^18 J
C. 7.11 x 10^6 J
D. 2.133 x 10^18 J
Answer:
B:
Explanation:
Hopes this help best friends.
Answer:
D
Explanation:
Cause b is not the right answer and when calculating you get D So I hope you guys understand
How many grams in 4.50 moles of NaNO3?
Answer:
382.5 grams
Explanation:
Find the molar mass of NaNO₃ and then multiply the number of moles by that molar mass :)
10. How many moles of glucose are in 0.5L of a 0.138M solution of glucose in
water?
Answer:
0.069 moles of glucose
Explanation:
(0.138 mol/L)(0.5 L) = 0.069 moles of glucose
Answer:
[tex]\boxed {\boxed {\sf 0.069 \ mol \ C_6H_12O_6}}[/tex]
Explanation:
Molarity is the moles per liter of a solution. It is found by dividing the moles of solute (glucose) by the liters of solution (water).
[tex]M= \frac {moles}{liters}[/tex]
We know the molarity is 0.138 M. 1 M is equal to 1 mole per liter, so we can rewrite the molarity as 0.138 moles per liter.
There are 0.5 liters of solution.
We are solving for the moles, so we can use x.
[tex]0.138 \ mol/L= \frac {x }{0.5 \ L}[/tex]
We must isolate the variable (x) to solve for the moles. It is being divided by 0.5 liters. The inverse operation of division is multiplication. Multiply both sides of the equation by 0.5 L.
[tex]0.5 \ L *0.138 \ mol/L= \frac {x }{0.5 \ L}* 0.5 \ L[/tex]
The liters on both sides cancel.
[tex]0.5 *0.138 \ mol= {x }[/tex]
[tex]0.069 \ mol =x[/tex]
[tex]0.069 \ mol \ C_6H_12O_6[/tex]
Ther are 0.069 moles of glucose in a 0.138 M solution with 0.5 liters of water.
The ocean has both deep currents and surface currents moving it around the Earth.
1.True
2.False
Answer: 1
Explanation: This is true.
Which of the following represent Dinitrogen tricarbide
1) NC
2) NC2
3) N2C2
4) N203
Answer:
I think is nc2 that represents5)
Which statement is true about a liquid but not a gas?
A)
It has more internal energy than the solid state.
B)
It will change shape and take the shape of its container
C)
It allows particle to move past each other relatively easily.
D)
It has close to a constant volume as pressure is applied to it.
Answer:
D) It has close to a constant volume as pressure is applied to it.
This is true for liquids but not for gas because on changing the pressure volume of gas may not be constant always
Helped by the one and only #DrippQueenMo
Write a balanced equation for the following:
1. P4 + O2 → P2O5
2. C3H8 + O2 → CO2 + H2O
3. Ca2Si + Cl2 → CaCl2 + SiCl4
plz help me 14 points
and heat.
4 Which increases the kinetic energy of the
particles that make up a bowl of soup?
A. dividing the soup in half
B. putting the soup in a refrigerator
C. heating the soup
for 1 min on a stove
D. decreasing the distance between the
particles that make up the soup
3. Determine the pH of each of the following solutions. (Hint: See Sample Problem B.) a. 1.0 x 10-2 M HCI c. 1.0 x 10-MHI b. 1.0 x 10-3 M HNO3 d. 1.0 x 10-M HB
Answer:
a. pH = 2 b. pH = 3 c. pH = 1 d. Unanswerable
Explanation:
pH = -log[H+] OR pH = -log{H3O+]
and inversely
pOH = -log[OH-]
1. Determine what substance you are working with, (acid/base)
2. Determine whether or not that acid or base is strong or weak.
a. 1.0 x 10^-2M HCl
HCl is a strong acid, therefore it will dissociate completely into H+ and Cl- with all ions going to the H+, therefore, the concentration of HCl and concentration of H+ are going to be equal, meaning we simply take the negative logarithm of the concentration of HCl and that would equal pH
pH = -log[H+]
pH = -log(1.0x10^-2)
pH = 2
b. 1.0 x 10^-3M HNO3
HNO3 like part a, is a strong acid, therefore it would simply require you to take the negative logarithm of the concentration of the compound itself, to find its pH.
pH = -log[H+]
pH = -log(1.0 x 10^-3)
pH = 3
c. 1.0 x 10^-1M HI
Like the previous parts, HI is a strong acid
pH = -log[H+]
pH = -log(0.10)
pH = 1
d. HB isn't an element, nor is it a compound so that would be unanswerable.
Even though the same amount of energy was transferred into both substances from the air, the isopropanol evaporated while the water did not. Why do you think the isopropanol changed phase, but the liquid water did not ... Earlier in the lesson, you observed isopropanol and water drops on a paper towel.HELP HELP PLS
Answer:
The isopropanol evaporated while the water did not because the molecules don't stick together as strongly as the molecules in the water do. The water would need more energy transferred in, in order to evaporate.
Explanation:
The isopropanol evaporates and the water does not because the heat capacity and the latent heat of isopropanol is far lesser than that of water.
The latent heat of vaporization is the amount of heat required by a given amount of substance to change its phase from liquid to gas. The latent heat of vaporization of isopropanol is far less than water, so at the same amount of heat, the isopropanol changes phase as it can easily evaporate even if a small amount of heat is provided. Whereas water requires to absorb a lot of heat energy to change its phase, since its latent heat of vaporization and specific heat capacity is very large as compared to isopropanol.
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How many grams is 2.40 x 1023 molecules of N,O,? (5 pts)
PLS HELP ASAP
Answer:
30.26 grams of N₂O₃
Explanation:
Divide by Avogadro's number. This leaves you with the number of moles. Then, multiply by the molar mass of N₂O₃
What occurs when solid A, at 50.0°C, is place in liquid B, at 80.0°C?
A Heat energy flows from A to B as the average kinetic energy of the particles in A decreases
B Heat energy flows from A to B as the average kinetic energy of the particles in A increases
CHeat energy flows from B to A as the average kinetic energy of the particles in B decreases
D Heat energy flows from B to A as the average kinetic energy of the particles in B increases
How can I express the composition of a solution?
Answer:
It can be expressed in several ways: molarity (moles of solute per liter of solution); mole fraction, the ratio of the number of moles of solute to the total number of moles of substances present; mass percentage, the ratio of the mass of the solute to the mass of the solution times 100; parts per thousand (ppt), grams ...
Explanation:
It can be expressed in several ways: molarity (moles of solute per liter of solution); mole fraction, the ratio of the number of moles of solute to the total number of moles of substances present; mass percentage, the ratio of the mass of the solute to the mass of the solution times 100; parts per thousand (ppt), grams ...
Help I need help with this :(
Answer:
biomass is a plant of animal material used as fuel to produce electricity
Tidal power is energy harnessed by converting engery from tides
That's what I know so far and took notes on hope it helped:)
how many grams of AgNO3 (MM=169.87) are needed to prepare 0.125 M solution in 250 mL of water?
a. 0.5 g
b. .03 g
c. 5.3 g
d. 84.9g
Answer:
Correct answer-C 5.3g
Explanation:
Molarity = no. of moles of solute/ volume of of solution in litre
olarity = no. of moles of solute/ volume of of solution in litreno of moles of solute = 0.125×0.25=0.03125
olarity = no. of moles of solute/ volume of of solution in litreno of moles of solute = 0.125×0.25=0.03125one mole AgNO3 weighs 169.87 gm,
olarity = no. of moles of solute/ volume of of solution in litreno of moles of solute = 0.125×0.25=0.03125one mole AgNO3 weighs 169.87 gm,so the mass of 0.03125 moles of AgNO3 = 0.03125×169.87= 5.3084g
The grams of AgNO₃ are needed to prepare 0.125 M solution in 250 mL of water is 5.3 grams.
How do we calculate mass from moles?Moles is a unit which is used to define any amount and it is calculated as:
n = W/M, where
W = required mass
M = molar mass
Given molarity of AgNO₃ = 0.125 M
Volume of water = 250mL = 0.25L
moles (n) from the molarity (M) will be calculated as:
n = M × V
n = (0.125)(0.25) = 0.0312 moles
Now we calculate the mass of AgNO₃ by using the above formula as:
W = (0.0312mol)(169.87g/mol)
W = 5.30 g
Hence option (c) is correct.
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A 2.5-liter sample of a gas has 0.30 mole of the gas. If 0.15 mole of the gas is added, what is the final volume of the gas? Temperature and pressure remain constant.
Answer:
1.125
Explanation:
I think it is his because if you add 0.30 and 0.15 it adds up to 0.45 so you just multiply 0.45 and 2.5 and then it gives you 1.125. HOPE IT HELPS.
A home is heated by a system that uses sunlight to warm water in pipes. Which statement best describes this system?
A. An active solar system because sunlight shines on the pipes naturally.
B. A passive solar system because light from the sun generates electrical energy.
C. An active solar system because the sun's energy is collected and moved throughout the house.
D. A passive solar system because sunlight heats the home without generating electrical energy.
Answer:
In which part of a nuclear power plant does fission take place? A home is heated by a system that uses sunlight to warm water in pipes. Which statement best describes this system? An active solar system because sunlight shines on the pipes naturally.
Explanation:
Hope it helps
FOLLOW MY ACCOUNT PLS PLS
Answer:
In which part of a nuclear power plant does fission take place? A home is heated by a system that uses sunlight to warm water in pipes. Which statement best describes this system? An active solar system because sunlight shines on the pipes naturally.
Explanation:
PLEASE HELP
Activation energy is
a. the energy required to form the activation complex.
b. the net energy difference between the products and reactants.
c. the heat of reaction.
d. free energy.
Which of the following molecules is correctly paired with its macromolecule class? (2 points)
Enzyme-nucleic acid
Cholesterol-protein
Glycogen-protein
RNA-nucleic acid
What object would have more gravitational potential energy, a skydiver up in the air inside of a plane, or that same skydiver after he/she has jumped out of the plane?
Answer:
Gravitational potential energy is a direct function of weight and height. Higher the object, high is the gravitational potential energy.
Therefore the skydiver inside of the plane has high gravitational potential energy than the same diver after she has jumped because height is now decreased as he is going down.
Which of the following relationships can be measured in light years?
the length of time it takes light to reflect from a plane mirror
the amount of light absorbed by the Earth
the index of refraction of a mirage
the distance between stars and galaxies
All of the choices are correct.
Describe how wave frequency changes across the electromagnetic spectrum, from radio waves to gamma rays
By increasing the frequency which changes the wavelength, frequency changes across the electromagnetic spectrum, from radio waves to gamma rays.
What is the electromagnetic spectrum?The electromagnetic spectrum is a wide range of frequencies that vary depending upon the wavelength of the spectrum and somehow the energy of photons also affects the frequencies and wavelengths.
There are three types of electromagnetic spectrum hydrogen spectrum emission spectrum due to the emission of light and absorption spectrum due to absorption of light.
Therefore, frequency changes across the electromagnetic spectrum, from radio waves to gamma rays are By increasing the frequency which changes the wavelength.
Learn more about the electromagnetic spectrum, here:
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Which of the following statements describes the elements in group 16 of the periodic table?
No links!
Answer:
C.
Explanation:
what is einsteins theory of relativity?
Answer:
The laws of the universe are for all observers, and it was shown that the velocity of light in spacetime will be the same regardless of the subject's speed.
Explanation:
The principle outlines how things behave in time and space, so it could be used to model anything from black hole life to light shifting due to the gravitational, as well as the action of the terrestrial Planets in its orbit. Einstein's most popular hypothesis has far-reaching ramifications.
The amount of energy transferred per unit time by an electrical appliance is measured in what? Give the
name not the symbol.
Answer:
The Watt
Explanation:
Electric power is the rate, per unit time, at which electrical energy is transferred by an electric circuit. The SI unit of power is the watt, one joule per second.
The amount of energy transferred per unit time is called power, and power is measured in Watt.
What is Watt?Watt is the unit of power. It is used to measure the transfer of power. This is named after James Watt.
When one joule of energy is transferred in one second, this is the power of the Watt.
Thus, the amount of energy transferred per unit time is called power, and power is measured in Watt.
Learn more about Watt
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Which organ is most directly involved in the excretion of waste products? Please help
Answer:
Explanation:
The liver
Answer:
Kidney
Explanation:
How many molecules of As4010 are in 6.2 mol of As4010?
Particle motion in ice is _________
than particle motion in water.
Answer:
slower(less faster)
the particles motion in a liquid state of a substance is faster than the particle motion in substance's solid state.
Particle motion in ice is slower than particle motion in water.
What is the motion of particles?The motion of particles is the random movement of the particles or electrons inside the atoms. These movements happen due to an increase in temperature or heat.
There are three types of matter, solid, gas, and liquid. These matters have different particle movements. Because these matters have different organizations of charged particles within them.
As ice is solid, the particles in solid have compact particle present. These particles are near to each other and do not move. And water is liquid, its particles move randomly. As liquid move and get the shape of the container. Its particles are in motion.
Thus, particle motion in ice is slower than particle motion in water.
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By what factor does the average kinetic energy of the molecules of gas in an aerosol container increase when the temperature is raised from 300 K to 900 Κ?
Answer:
The average kinetic energy is increased by a factor of 3.
Explanation:
The average kinetic energy is given by:
[tex] \overline{E} = \frac{3}{2}kT [/tex]
Where:
k: is the Boltzmann constant
T: is the temperature
When the temperature is 300 K we have:
[tex] \overline{E_{1}} = \frac{3}{2}300k [/tex]
Now, when the temperature is 900 K:
[tex] \overline{E_{2}} = \frac{3}{2}900k = 3(\frac{3}{2}300k) = 3\overline{E_{1}} [/tex]
Therefore, when the temperature is raised from 300 K to 900 Κ, the average kinetic energy is increased by a factor of 3.
I hope it helps you!