when heated, the temperature of a water sample increased from 15 degrees celsius to 39 degrees celsius. It absorbed 4300 joules of heat. What is the mass, in grams, of the sample?
Answers
Mass of water: 43 g
Explanation:
When a substance is heated, the temperature of the susbtance increases according to the equation:
where
Q is the amount of heat supplied to the substance
m is the mass of the substance
C is the specific heat capacity of the substance
is the increase in temperature
In this problem, we have:
Q = 4300 J is the heat absorbed by the water
C = 4200 J/gC is the specific heat capacity of water
is the increase in temperature
By re-arranging the equation, we can find the mass:
Learn more about specific heat:
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Final answer:
The mass of the water sample can be calculated using the formula for heat absorption: Q = mcΔT.
Given that the water sample absorbed 4300 joules of heat and the temperature increased from 15°C to 39°C, the mass of the water sample is approximately 43.03 grams.
Explanation:
This physics problem can be solved by using the formula for heat absorption:
Q = mcΔT,
where Q is the heat absorbed (in joules), m is mass (in grams), ΔT is the change in temperature (in °C) and c is the specific heat capacity. For water, c is 4.186 joules/gram°C.
The change in temperature (ΔT) of the water sample is the final temperature (39°C) minus the initial temperature (15°C), which equals 24°C.
Using the given value for Q (4300 joules), we rearrange the formula to calculate m (mass):
m = Q / (cΔT) = 4300 / (4.186*24) ≈ 43.03 grams.
Thus, the mass of the water sample is approximately 43.03 grams.
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Related Questions
What kind of mixture is a solution? A suspension? A colloid?
NEED URGENT HELP WITH SCIENCE HOMEWORK. TRIED MY BEST TO FIGURE OUT BUT COULDNT. I WILL MARK YOU BRAINLIEST!!Morains aredepositional material covered up when a glacier formsdeposition material exposed after a glacier retreatsdepositional material on top of a glacierWhich of the following is a feature of old glacial areas?Limestone pavementDesertsFjordsWhich of the following is required for karst topography?limestone rock is exposed to the surfaceprecipitation is adequate for the necessary chemical reactions to occurboth of the aboveWhich of the following causes most coastal erosion?WindWavesBiological activityWhich of the following statements is false about constructive waves on coastal shorelines?Constructive waves carry sand to the shorelineCompared waves deposit sand on the shorelineConstructive waves are the major contributor to beach erosionThe fetch is the water that washes up on a shore after the breaking of a wave.TrueFalseWave refraction, the bending of waves as they approach an island, is the process responsible for the formation of bays.TrueFalseThe subtropical zones are ________ because they are influenced by dry descending air.dry desertswarm tropicscold tundraIn humid climates, dense vegetation discourages wind erosion.TrueFalse
Name the type of chemical reaction : CaO(s) + H2O(l) -----------Ca(OH)2(aq)
why the total mass of the products would be less than the total weight of the reactant after a chemical reaction?
doing
MSDS
drink
eat
mix
goggles
safety shower
water
acids
Rule number one in laboratory safety is know what you are
doing
.
The best protections from chemical splashes and spills are an ________
to cover your body and _________
for your eyes.
Never
eat
food or
drink
liquids from a lab container, even if it has been thoroughly washed.
Rinse skin thoroughly with
water
after a chemical splash.
A _________
should be used for more significant spills.
Pour
acids
into water, never the other way around.
Do not
mix
chemicals unless you know what the product of the reaction will be.
A _________
describes important safety and reactivity information about a chemical.
Fill in the blanks please
Answers
A Safety shower should be used for more significant spills.
An MSDS (Material Safety Data Sheet) describes important safety and reactivity information about a chemical.
I hope this helps. Let me know in the comments if anything is unclear.
Answers
Answer:
a
Explanation:
i took the quiz
reacts?
Answers
Answer:
3.79 g of N2.
Explanation:
We'll begin by writing the balanced equation for the reaction.
This is given below:
4NH3 + 3O2 → 2N2 + 6H2O
Next, we shall determine the mass of O2 that reacted and the mass of N2 produced from the balanced equation.
This is illustrated below:
Molar mass of O2 = 16x2 = 32 g/mol
Mass of O2 from the balanced equation = 3 x 32 = 96 g
Molar mass of N2 = 2x14 = 28 g/mol
Mass of N2 from the balanced equation = 2 x 28 = 56 g
Summary:
From the balanced equation above,
96 g of O2 reacted to produce 56 g of N2.
Finally, we shall determine the mass of N2 produced by reacting 6.50 g of O2.
This can be obtained as follow:
From the balanced equation above,
96 g of O2 reacted to produce 56 g of N2.
Therefore, 6.50 g of O2 will react to produce = (6.50 x 56)/96 = 3.79 g of N2.
Therefore, 3.79 g of N2 were obtained from the reaction..
The product of the reaction is MgO. Describe what you observed in the reaction. Then consider the general AB form of a synthesis reaction. Write the chemical reaction, balancing the equation so that there are an equal number of atoms of each type in both the reactants and the product.
Answers
Answer:
2Mg + O₂ ⇒ 2 MgO
Explanation:
When the MgO formation reaction is carried out experimentally, it can be seen that Magnesium a solid that has a metallic luster, when a flame is brought closer so that the oxidation reaction of the metal occurs, it is appreciated that a colored flame is produced white for a few moments (the duration of the flame depends on the initial amount of magnesium) and when the reaction finished, the magnesium became a white solid, opaque and very fragile. This is because Mg reacted with oxygen and magnesium oxide formed, which is the white solid.
Synthesis reactions are those in which two or more reagents combine to obtain a new product compound. The general formula for this type of reaction is:
A + B ⇒ C
In the case of the example of the statement, the reaction form of this synthesis would be:
2Mg + O₂ ⇒ 2 MgO
The equation is matched in such a way that there is the same amount of atoms of each species in both reagents and products, thus respecting the principle of conservation of mass.
Clarification: In the synthesis reaction, oxygen is placed in its molecular form (O₂), because the compound is naturally found, it is a simple substance. Magnesium, on the other hand, is found as a simple substance as atoms.
The reaction between Magnesium and Oxygen produces Magnesium Oxide. The balanced equation is 2Mg + O2 → 2MgO.
In the reaction, Magnesium (Mg) reacts with Oxygen (O) to produce Magnesium Oxide (MgO).
The balanced chemical equation for this synthesis reaction is:
2Mg + O2 → 2MgO
In this equation, there are an equal number of atoms of each type on both sides of the equation, which follows the principle of conservation of mass.
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Answers
Answer:
(got a 100%, 4/4 points)
I personally think Thompson was most important. He discovered the electron and improved hugely on the atomic model with a positively charged sphere with negative electrons dispersed throughout, and the atom with a neutral charge.
I think that without him, Rutherford wouldn't have done his gold foil experiment. Since Rutherford discovered the nucleus is positive, Bhor was able to find electrons have energy levels and that wouldn't have happened without Rutherford, who happened because of Thompson.
Answers
Answer:
The correct answer is by adding surface roughness to increase friction.
Explanation: