Answer:
dic
Explanation:
A flask containing 855 grams of water was heated. If the temperature of the water was raised from 21.0 to 85.0 degrees Celsius, how much heat (in joules) did the water absorb? the specific heat capacity of liquid water is 4.184J/g per C
Answer:
The heat absorbed by the water is 228,948.48 J
Explanation:
Calorimetry is the measurement and calculation of the amounts of heat exchanged by a body or a system.
In this way, between heat and temperature there is a direct proportional relationship (Two magnitudes are directly proportional when there is a constant so that when one of the magnitudes increases, the other also decreases; and the same happens when either of the two decreases .). The constant of proportionality depends on the substance that constitutes the body and its mass, and is the product of the specific heat and the mass of the body. So, the equation that allows to calculate heat exchanges is:
Q = c * m * ΔT
where Q is the heat exchanged by a body of mass m, constituted by a substance of specific heat c and where ΔT is the variation in temperature.
In this case:
c= 4.184 [tex]\frac{J}{g*C}[/tex]m=855 gΔT= Tfinal - Tinitial= 85 °C - 21°C= 64 °CReplacing:
Q= 4.184 [tex]\frac{J}{g*C}[/tex] *855 g* 64 C
Solving:
Q= 228,948.48 J
The heat absorbed by the water is 228,948.48 J
how would I write these out
Answer:
Please see the attached image. The one on the left is the first one and the one on the right is the second one.
Hope that helps.
1. (03.07 LC) Carbon atoms naturally bond with each other in chains, rings, or networks, but they cannot bond with oxygen or nitrogen. (2 points) True False
Answer:
false
Explanation:
Carbon atoms are found in hydrocarbons, naturally occurring compound with carbon and hydrogen, but there are molecules in nature that contain beside carbon and hydrogen, oxygen and nitrogen too. In this compounds there are carbon-oxygen and carbon-nitrogen covalent bonds.
Bellow you may see the chemical structure of adrenaline, a hormon found in the human body, were the oxygen (red) and nitrogen (blue) are bonded to carbon.
Answer:
false
Explanation:
Carbon atoms often naturally bond with each other in chains, rings, plates, or networks, and they also bond readily with hydrogen, oxygen, nitrogen, sulfur, phosphorus, and the halogens.
About 97.5% of Earth’s water is
Answer: Water
Explanation:
A sample of a compound containing only carbon and hydrogen was burned to produce 1.36g of water and 5.22g of carbon dioxide. Calculate the empirical formula of the compound?
Answer:
[tex]C_4H_5[/tex]
Explanation:
Hello!
In this case, since the combustion analysis provides us the yielded mass of both water and carbon dioxide, as the sources of hydrogen and carbon in the hydrocarbon, we are able to compute the moles of each via the following mole-mass relationships:
[tex]n_H=1.36gH_2O*\frac{1molH_2O}{18.02gH_2O}*\frac{2molH}{1molH_2O}=0.151molH\\\\n_C=5.22gCO_2*\frac{1molCO_2}{44.01gCO_2}*\frac{1molC}{1molCO_2}=0.119molC[/tex]
Now, we divide those moles by the fewest ones (those of carbon) in order to compute their subscripts in the empirical formula:
[tex]C: \frac{0.119}{0.119} = 1 \\\\H:\frac{0.151}{0.119} = 1.27[/tex]
However we need whole numbers, that is why we multiply each subscript by 4 to get 4 for carbon and 5.08 ≅ 5 for hydrogen:
[tex]C_4H_5[/tex]
Best regards!
how ferons is responsible for depletion of ozone layer?
An aqueous solution is 1.00% by mass ethanol, CH3CH2OH, and has a density of 0.996 g/mL.
The molarity of ethanol in the solution is
M.
The molarity of ethanol in the solution is 0.217 M
Further explanationGiven
1% by mass
density = 0.996 g/ml
Required
The molarity
Solution
mass/ml of Ethanol :
1% x 0.996 g/ml = 0.00996 g/ml
For 1 L solution :
0.00996 g/ml x 1000 ml/L = 9.96 g/L
Convert to mol/L(MW ethanol=46 g/mol) :
9.96 g/L : 46 g/mol= 0.217 mol/L = 0.217 M
Or you can use equation :
[tex]\tt M=\dfrac{\%mass\times \rho\times 10}{MW}\\\\M=\dfrac{1\times 0.996\times 10}{46}=0.217[/tex]
i dont get it, what am i supposed to do?
Answer:
It appears to be
replacementExplanation:
I did that question.
The columns in the periodic table are called groups. What do the elements in Group 17 have in common
Answer:
They all have 7 valence electrons on it's outer shell.
Answer:
I have that question rn, I think the best answer is that they tend to form ions with a -1 electric charge.
Explanation:
Which is the most likely to be reduced?
Answer : The correct option is, [tex]Zn^{2+}[/tex]
Explanation :
Oxidation reaction : It is defined as the reaction in which a substance looses its electrons. That means, the loss of electrons takes place.Or we can say that, oxidation reaction occurs when a reactant losses electrons in the reaction.
Reduction reaction : It is defined as the reaction in which a substance gains electrons. That means, the gain of electrons takes place.Or we can say that, reduction reaction occurs when a reactant gains electrons in the reaction.
According to the electrochemical series, [tex]Zn^{2+}[/tex] most likely to be reduced because
Hence, the ion most likely to be reduced is [tex]Zn^{2+}[/tex].
The most likely to be reduced is Cu ²⁺. Because it is stronger oxidizing agent.
What is an oxidizing agent ?In a redox chemical reaction, an oxidizing agent is a material that "accepts" or "receives" an electron from a reducing agent. So every substance that oxidizes another material is an oxidant.
A material that induces oxidation by receiving electrons becomes reduced when it acts as an oxidizing agent. A chemical that reduces something by gaining electrons is said to be an oxidizing agent.
The reduction that takes place, which involves Cu, is the one with the highest positive reduction potential. This is because either Cu2+ is a stronger oxidizing agent than Zn2+ or Cu2+ is more likely to be reduced than Zn2+.
Thus, option D is correct.
To learn more about oxidizing agent, follow the link;
https://brainly.com/question/10547418
#SPJ2
Which of these particles are lost in the oxidation process?
OA protons
OB.
neutrons
Ос. .
electrons
OD.
atoms
Answer: electrons
Explanation:
During oxidation and reduction, both of which are redox reactions, electrons are transferred.
Which transfer of heat is depicted in the figure?
Answer:
Oh it is convention
Explanation:
because the heat transfer is through fluids
You have 28.5 g of iron shot that has a volume of 3.60 mL. From this information, calculate the density of iron.
Answer:
[tex]\boxed {\boxed {\sf \rho \approx 7.917 \ g/mL}}[/tex]
Explanation
Density can be found by dividing the mass by the volume.
[tex]\rho=\frac{m}{v}[/tex]
We know the iron sheet has a mass of 28.5 grams and the volume is 3.60 milliliters.
[tex]m= 28.5 \ g \\d= 3.60 \ mL[/tex]
Substitute the values into the formula.
[tex]\rho=\frac{28.5 \ g}{ 3.60 \ mL}[/tex]
Divide.
[tex]\rho = 7.91666667 \ g/mL[/tex]
Let's round to the nearest thousandth.
The 6 in the ten-thousandth tells us to round the 6 to a 7.
[tex]\rho \approx 7.917 \ g/mL[/tex]
The density of iron is about 7.917 grams per milliliter.
Students are discussing the pros and cons of petroleum as a naturals resource. Which of the following do you agree with?
Answer:
this is a multiple choice question where are the answers
Explanation:
how many atoms are in 45.22 moles of strontium
Answer:
272.31× 10²³ atom of strontium
Explanation:
Given data:
Number of moles of strontium = 45.22 mol
Number of atoms = ?
Solution:
The given problem will solve by using Avogadro number.
It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance. The number 6.022 × 10²³ is called Avogadro number.
1 mole = 6.022 × 10²³ atoms
45.22 mol × 6.022 × 10²³ atom / 1 mol
272.31× 10²³ atom
What are genes that have been changed called?
Scientists predict that the human population will continue to increase will likely happen as a result?
Answer: The prediction that human population is likely to increase may result in severe problems like global warming, extinction of animals due to human activities, et cetera.
Explanation:
The human population needs resources to survive, they use the resources in such a way that it is being exploited, the trees will be cut in such a large numbers that it will affect the animals depending them.
The human population also uses fossil fuels, burning of which releases harmful gases in the environment.
The usage of technology also comes with the curse of global warming because of release of green house gases such as chlorofluorocarbon.
With an increase in human population, there can be seen many harmful effects on environment.
Answer:
whatttttttttyu[poiuytrtyuiopoiuygtfdfghjkjhgfdfghjk
Explanation:
oles
A bottle of H3PO4 contains 30.00 g, how many moles are in this container?
Moles in the container : 0.306
Further explanationGiven
30 g of H3PO4
Required
moles in container
Solution
A mole is a unit of many particles (atoms, molecules, ions) where 1 mole is the number of particles contained in a substance that is the same amount as many atoms in 12 gr C-12
1 mole = 6.02.10²³ particles
While the number of moles can also be obtained by dividing the mass (in grams) with the molar mass of element or molecule
MW of H3PO4 = 3.1 + 31 + 4.16 = 98 g/mol
mol = mass : MW
mol = 30 : 98
mol = 0.306
a) Find the gas speed of sulfur dioxide at 100.0 degrees Celsius? ______________
b) What is the rate of effusion of sulfur dioxide compared to nitrogen triodide at the same temperature? __________________
a. 381.27 m/s
b. the rate of effusion of sulfur dioxide = 2.5 faster than nitrogen triiodide
Further explanationGiven
T = 100 + 273 = 373 K
Required
a. the gas speedi
b. The rate of effusion comparison
Solution
a.
Average velocities of gases can be expressed as root-mean-square averages. (V rms)
[tex]\large {\boxed {\bold {v_ {rms} = \sqrt {\dfrac {3RT} {Mm}}}}[/tex]
R = gas constant, T = temperature, Mm = molar mass of the gas particles
From the question
R = 8,314 J / mol K
T = temperature
Mm = molar mass, kg / mol
Molar mass of Sulfur dioxide = 64 g/mol = 0.064 kg/mol
[tex]\tt v=\sqrt{\dfrac{3\times 8.314\times 373}{0.064} }\\\\v=381.27~m/s[/tex]
b. the effusion rates of two gases = the square root of the inverse of their molar masses:
[tex]\rm \dfrac{r_1}{r_2}=\sqrt{\dfrac{M_2}{M_1} }[/tex]
M₁ = molar mass sulfur dioxide = 64
M₂ = molar mass nitrogen triodide = 395
[tex]\tt \dfrac{r_1}{r_2}=\sqrt{\dfrac{395}{64} }=\dfrac{20}{8}=2.5[/tex]
the rate of effusion of sulfur dioxide = 2.5 faster than nitrogen triodide
plzzz help me out as I was not in class and I missed the lesson
Answer:
Well why didn't you do it? Have a great day and I am so sorry for wasting your points I don't need them. I hope someone helps!! ;)
Explanation:
PLEASE HELPPPPPPPPPPPPPPPP MEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE LOL
PLEASE WRITE IN YOUR OWN WORDS
1. After your body breaks food down, what are three things that can happen to the atoms from your food? *
2. Would you be able to get energy from food if there weren’t chemical reactions in your body? Why or why not? *
Answer:
1 Once proteins, fats and carbohydrates are digested, absorption takes place in the small intestine.
2 if we eat food we get energy, but if there weren't chemical reaction in your body nothing happens.
Explanation:
1 Most of the digestion occurs in the first part of the small intestine while the absorption of broken down nutrients, water, vitamins, and minerals occurs in the rest of it.
When
or more objects come in contact with eachother this is called
contact force.
two
Explanation:
When two or more objects come in contact with each other this is called contact force
This is the smallest particle in a compound. It is made up of 2 or more atoms.
Gaseous ethane, C2H6, burns in the presence of oxygen
gas according to the balanced equation below.
2 C2H6 (g) + 7 O2 (g) —+ 4CO2 (g) + 6 H20 (g)
How many moles of carbon dioxide can be produced from
1.00 mol of ethane?
04.00 mol CO2
0 0.50 mol CO2
01.00 mol CO2
2.00 mol CO2
Moles of Carbon dioxide(CO2) = 2
Further explanationGiven
Reaction
2 C2H6 (g) + 7 O2 (g) —+ 4CO2 (g) + 6 H20 (g)
Required
moles of carbon dioxide
Solution
The reaction coefficient shows the mole ratio of the compounds in the reaction equation (reactants and products)
From the equation, mol ratio of C2H6 : CO2 = 2 : 4, so mol CO2 :
mol CO2 = (4/2) x mol C2H6
mol CO2 = 2 x 1
mol CO2 = 2
Kelly needs a new car. She decides to buy the first one she sees. This is an example of making a decision by:
A
resistance
B
impulse
C
planning
D
default
help please
Answer:
B. Impulse
Explanation:
A= she is not resisting buying the car
B= She bought the car right away(impulse)
C = She did not plan ahead on what car she would buy
D= Not reasonable
what should the government do to preserve our culture and heritage?
please mark as brainliest
what is this equivalent to
-k+3k
Answer:
2k
Explanation:
Answer:
+2k
Explanation:
Because +++k and -k answer is ++k
One +Cancel with -
On a distance-time graph, the slope of the line indicates the ________ of the object
Answer:
Speed
Explanation:
On a distance - time graph, the slope of the line indicates the speed of the object.
Speed is the rate of change of distance with time.
Speed = [tex]\frac{distance}{time}[/tex]
Now, the slope is the change in distance with the change time which is commensurate with the speed equation.
For a displacement - time graph, the slope is the velocity.
Therefore the slope of a distance - time graph is its speed.
Which is the most likely to be reduced
Answer:
B
Explanation:
Answer: Fe3+
Explanation: j took the quiz
(BRAINLIEST) PLEASE HELP!
Answer:
The answer would be Helium-8.