what is the heat required to heat in 50 g sample of ice from -65 degrees Celsius to -40 degrees Celsius
Answer:
[tex]Q=2562.5J[/tex]
Explanation:
Hello there!
In this case, for this general calorimetry problem, it turns out possible for us to calculate the required heat by using the general heat equation in terms of the mass, specific heat and temperature change:
[tex]Q=mC(T_f-T_i)[/tex]
Thus, by plugging in the mass, the initial and final temperatures and the specific heat of ice, 2.05 in SI units, we obtain:
[tex]Q=50g*2.05\frac{J}{g\°C} (-40\°C+65\°C)\\\\Q=2562.5J[/tex]
Regards!
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Answer:
11690J
Explanation:
Use formula Q = mL
where:
Q = Energy (J)
m = Mass (g)
L = Latent heat of fusion for water (J/g) = 344J/g
Therefore:
Q = 35.0 x 344
Q = 11690J
A weather balloon has a volume of 105L at 0.97 atm when the temperature is 318K. What is the volume
at 293K and 1.05 atm?
Answer:
89 L
Explanation:
Step 1: Given data
Initial pressure (P₁): 0.97 atmInitial volume (V₁): 105 LInitial temperature (T₁): 318 KFinal pressure (P₂): 1.05 atmFinal volume (V₂): ?Final temperature (T₂): 293 KStep 2: Calculate the final volume of the weather balloon
If we assume that the gas inside the balloon behaves as an ideal gas, we can calculate the final volume of the gas using the combined gas law.
P₁ × V₁ / T₁ = P₂ × V₂ / T₂
V₂ = P₁ × V₁ × T₂ / T₁ × P₂
V₂ = 0.97 atm × 105 L × 293 K / 318 K × 1.05 atm = 89 L
A balloon is filled with 3.50 L of water at 24.0°C. What is the volume of the water at 307 K?
Answer:
what is the volume of the water at 307 k?
Calculate the volume of a gas sample at 273 K and 101.325 kPa if 455 cm of the gas are
collected at 36.0 °C and 97.0 kPa. What is the name of the gas law used in this calculation?
Answer:
The name of the game law used is called the Charles Law
0.41g of neon is held in a 200. mL container at 11 °C. Calculate the pressure in atm.
Answer:
2.39 atm
Explanation:
We'll begin by calculating the number of mole in 0.41 g of neon (Ne). This can be obtained as follow:
Mass of Ne = 0.41 g
Molar mass of Ne = 20 g/mol
Mole of Ne =.?
Mole = mass / molar mass
Mole of Ne = 0.41 / 20
Mole of Ne = 0.0205 mole
Next we shall convert 200 mL to L.
1000 mL = 1 L
Therefore,
200 mL = 200 mL × 1 L / 1000 mL
200 mL = 0.2 L
Next, we shall convert 11 °C to Kelvin temperature.
T(K) = T(°C) + 273
T(°C) = 11 °C
T(K) = 11 + 273
T (K) = 284 K
Finally, we shall determine the pressure. This can be obtained as follow:
Mole of Ne (n) = 0.0205 mole
Volume (V) = 0.2 L
Temperature (T) = 284 K
Gas constant (R) = 0.0821 atm.L/Kmol
Pressure (P) =?
PV = nRT
P × 0.2 = 0.0205 × 0.0821 × 284
P × 0.2 = 0.4779862
Divide both side by 0.2
P = 0.4779862 / 0.2
P = 2.49 atm
Therefore, the pressure of the gas is 2.39 atm
How many moles of aluminum oxide (Al2O3) will be produced if 1.5 mole of aluminum (AI) reacts with oxygen? Input a numerical answer only. 4Al + 302 ---> 2Al2O3
Explanation:
The number of moles of Al2O3 formed is approximately 4.25 moles. Second find the limiting reactant. Since O2 has less value that is 2.126 than Al that is 2.287, O2 is the limiting reactant in this reaction.
1. In a chemical reaction
a. the mass of the reactants equals the mass of the products.
b. the mass of the products is greater than the mass of reactants.
c.the number of atoms in the reactants and products must change.
d. energy as heat must be added to the reactants.
Answer:
A
Explanation:
Law of conservation of matter
Which answer best describes this reaction?
H H
O
HH
H H
HH
H-C-C-C
1 |
H H
H-C-C-C
0-C-C-H
+ H-O-C-C-H -
1
O-H
H H
HH
Η Η
H20
O formation of an ester by condensation
O formation of an ether by condensation
O formation of a new product using a substitution reaction
O formation of a new product using an addition reaction
Answer: option c
Explanation:
Trust
The answer which best describes this chemical equation is formation of a new product using a substitution reaction.
Chemical equation is a symbolic representation of a chemical reaction which is written in the form of symbols and chemical formulas.The reactants are present on the left hand side while the products are present on the right hand side.
A plus sign is present between reactants and products if they are more than one in any case and an arrow is present pointing towards the product side which indicates the direction of the reaction .There are coefficients present next to the chemical symbols and formulas .
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What are the two sources of electricity? (Supposed to be found in a Bill Nye video)
Answer:
The three major categories of energy for electricity generation are fossil fuels (coal, natural gas, and petroleum)
Explanation:
:)
Naphthalene, C10H8, an ingredient in mothballs, has a molar mass of 128.18 g/mol. How many molecules of naphthalene are in a mothball that has 6.000 g of naphthalene?
Answer:
2.83 × 10²² molecules.
Explanation:
Using the formula below to calculate the number of moles of Naphthalene:
mole = mass/molar mass
Where;
mass = 6.00g
Molar mass = 128.18 g/mol
mole = 6/128.18
mole = 0.047mol
To calculate the number of molecules of naphthalene in the mothballs, we multiply the number of moles (n) by Avagadro's number i.e.
number of molecule = n × 6.02 × 10^23
number of molecules = 0.047 × 6.02 × 10^23
= 0.283 × 10²³
= 2.83 × 10²² molecules.
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& Write five examples of liquid to liquid mixture.
Answer:
huikl
daffafafafafa
explane why a stone is compact water has the ability to flow and the fragrance of perfumes spreads?
Answer:
The reason here is due to the variation of states of matter such that Stone which is an example of solid composed of the molecules which are so tightly packed that they dont have the ability to move.So thats why due to the compact arrangement of particles of stone,stone is a compact body while Water is made of particles that have a low force of attraction in between them when compared with solids thats why the particles are freed to move within the volume of water and so thats why water have the ability to flow on the land when force applied such as gravitation.But fragnances are the gaseous matter which have the particles such that so loosely packed that are freed to move randomly at any direction such as air and thats why fragnaces spreads in all the whole volume that provided to them. Due to because of the varation of pressure,intermolecular force of attraction,intermolecular space and other physical properties in all three states thats why the physical appearance of these substances of different states differs.
Hope it helps
In an endothermic reaction, the energy of
the surroundings is
than the energy of
the system
Answer:
THE CORRECT ONE IS THE SECOND ONE WITH THE SIGN IS " = "
Explanation:
THE GIVEN EXPLANATION : Endothermic reactions are chemical reactions in which the reactants absorb heat energy from the surroundings to form products. These reactions lower the temperature of their surrounding area, thereby creating a cooling effect. ... When a chemical bond is broken, it is usually accompanied by a release of energy.
Given the following sets of values, calculate the unknown
quantity.
a) P = 5.23 atm
V=?
n = 0.831 mol
T = 27°C
Answer:
3.91 L
Explanation:
Using the ideal gas law equation as follows:
PV = nRT
Where:
P = pressure (atm)
V = volume (L)
n = number of moles (mol)
R = gas law constant (0.0821 Latm/molK)
T = temperature (K)
Based on the information given in this question,
P = 5.23 atm
V= ?
n = 0.831 mol
T = 27°C = 27 + 273 = 300K
Using PV = nRT
V = nRT/P
V = (0.831 × 0.0821 × 300) ÷ 5.23
V = 20.47 ÷ 5.23
V = 3.91 L
Refer to the graph below. In order to have a saturated solution, how many grams of potassium nitrate, KNO3, need to be dissolved in 100 grams of water
at 20°C. Select the closest measurement. A.60 B.100 C.30 D.20
Answer:
C. 30.
Explanation:
Hello there!
In this case, according to the definition of the solubility, as the maximum amount of a solute that can be completely dissolved in a solvent without the formation of a precipitate, we can see that at the vertical line of 20 °C, on the KNO3 curve, we can see an intercept at about 30.
Such 30 means that just 30 grams of KNO3 will be completely dissolved in 100 g of water at 20°C, by means of its temperature dependent solubility; and therefore the answer is C. 30.
Regards!
-4. A student learns that all of the particles within an object possess kinetic energy. Based on this fact,
the student can conclude that all of the particles in the object-
A. Contains the same atoms. B. Are hotter than their surroundings C.Are in motion. D. Are covalently bonded
Answer:
C
Explanation:
The correct option is option C. which is "are in motion".
All the particles inside an object have kinetic energy, which implies that the particles are moving. Kinetic energy is the force that drives an object's or its constituent parts in motion. As a result, it can be inferred from this fact that the object's particles are in motion.
Options A, B, and D are not necessarily true based on the given information. The fact that particles have kinetic energy does not imply that they contain the same atoms (option A), are hotter than their surroundings (option B), or are covalently bonded (option D). These characteristics are not directly related to the presence of kinetic energy in particles.
Therefore, option c is the correct option.
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If we have 0.06 moles of HCI
How many grams of magnesium metal is that?
Answer:
1.44 g
Explanation:
From the question given above, the following data were obtained:
Number of mole of HCl = 0.06 mole
Mass of Mg =?
From the question given above, we discovered the number of mole of HCl is equivalent to the number of mole of Mg. Thus,
Number of mole of Mg = number of mole of HCl
Number of mole of Mg = 0.06 mole
Finally, we shall determine the mass of Mg. This can be obtained as follow:
Number of mole of Mg = 0.06 mole
Molar mass of Mg = 24 g/mol
Mass of Mg =?
Mass = mole × molar mass
Mass of Mg = 0.06 × 24
Mass of Mg = 1.44 g
Therefore, the mass of magnesium is 1.44 g
define functional group
Answer:
a functional group is a specific group of atoms or bonds within a compound that is responsible for the characteristic chemical reactions of that compound.
Explanation:
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Anyone knows gunpowder formula?
Can someone help me out, thanks
Answer:
See EXPLANATION
Explanation:
We must bear in mind that in balancing chemical reaction equations, the number of atoms of each element on the right hand side must be the same as the number of atoms of the same element on the left hand side of the reaction equation. This follows from the law of conservation of mass.
Based on this;
There are two oxygen atoms on the left hand side of the reaction equation, thus total mass of oxygen = 2 * 16 amu = 32 amu
There are two oxygen atoms on the product side of the reaction equation, thus the total mass of oxygen = 2 * 16 amu = 32 amu
Why is the regression equation not exactly y = 100 • 0.5n?
Answer:
Radioactive decay is a random event.
Explanation:
on edge
Answer:
Radioactive decay is a random event.
Explanation:
Edge 2020
Changing from solid to a liquid at or above melting point
is
Answer:
liquefaction
liquefaction is a process when a something turns into a liquid.
Explanation:
A common asteroid is in the first photograph. Haley's Comet is in the second photograph. What can be inferred about comets and asteroids? Answer A Both have orbits around the Earth that are ellipses B Both are miniature planets because they orbit the Sun C Both could be planetary fragments from the beginnings of solar system formation D Both are made of rock, ice, and solar dust from the beginning of the solar system
Answer:
D Both are made of rock ,ice and solar dust from the beginning of the solar system
Answer:
The answer is D
Explanation:
2 C6H14 + 19 O2 --> 12 CO2 + 14 H2O
Given 250 g of Oxygen and 50 grams of CoH14 what is the maximum amount of water that can be formed?
• Box 1 = number
• Box 2 = units
Box 3 = Substance
Answer:
4.06 mol H₂O
Explanation:
2C₆H₁₄ + 19O₂ → 12CO₂ + 14H₂OFirst we convert the given masses of reactants into moles, using their respective molar masses:
250 g O₂ ÷ 32 g/mol = 7.81 mol O₂50 g C₆H₁₄ ÷ 86 g/mol = 0.58 mol C₆H₁₄Now we calculate how many O₂ moles would react completely with 0.58 C₆H₁₄ moles, using the stoichiometric coefficients of the reaction:
0.58 mol C₆H₁₄ * [tex]\frac{19molO_2}{2molC_6H_{14}}[/tex] = 5.51 mol O₂As there are more O₂ moles than required (7.81 vs 5.51), O₂ is the reactant in excess. That means that C₆H₁₄ is the limiting reactant.
Now we can calculate how much water can be formed, using the number of moles of the limiting reactant:
0.58 mol C₆H₁₄ * [tex]\frac{14molH_2O}{2molC_6H_{14}}[/tex] = 4.06 mol H₂Owhen rolling a number cube 500 times, how many times you expect to get a 3?
Answer:
[tex]\frac{250}{3}[/tex]
Explanation:
you can expect to get a 3 (theoretically) 1 time every 6 times you roll. A 1/6 chance.
Here's the equation:
[tex]\frac{1}{6} =\frac{x}{500}[/tex]
cross multiply (i think that's what it is called)
500=6x
divide by 6 on both sides:
x=[tex]\frac{250}{3}[/tex] or approx 83 times.
Hope this helps! Lmk if u have more questions <3
A metal gas cylinder is heated from 181 K to 296 K. If the original pressure was 256 psi, what is the pressure after heating also in psi?
Answer:
419 psi
Explanation:
Assuming the gas behaves ideally, we can solve this problem by using Gay-Lussac's law, which states:
P₁T₂=P₂T₁Where subscript 1 stands for the initial conditions and 2 for the final ones, meaning that in this case:
P₁ = 256 psiT₂ = 296 KP₂ = ?T₁ = 181 KWe input the data:
256 psi * 296 K = P₂ * 181 KAnd solve for P₂:
P₂ = 419 psiCalculate mL (4 sf) of 0.7500 M sodium hydroxide required to neutralize 35.00 mL of 0.7500 M phosphoric acid. Please input number as whole number not scientific notation
Answer:
105mL of 0.7500M of NaOH are required
Explanation:
Phosphoric acid, H₃PO₄, reacts with sodium hydroxide, NaOH, as follows:
H₃PO₄ + 3 NaOH → Na₃PO₄ + 3H₂O
Where 1 mole of phosphoric acid reacts with 3 moles of NaOH
To solve this question we must find, as first, the moles of H3PO4 that react. Using the chemical equation we can find the moles of NaOH required to neutralize this acid. And, with its concentration, we can find the volume oof NaOH required:
Moles H3PO4:
35.00mL = 0.03500L * (0.7500mol / L) = 0.2625 moles H3PO4
Moles NaOH:
0.2625 moles H3PO4 * (3mol NaOH / 1mol H3PO4) = 0.07875 moles NaOH
Volume NaOH:
0.07875 moles NaOH * (1L / 0.7500mol) = 0.105L =
105mL of 0.7500M of NaOH are requiredWhich element is not found in the skeleton of amino acids?
Answer:
Serine. Serine is non-essential amino acid supplied from food or synthesized by the body from a number of metabolites, including glycine. Serine is found in soybeans, nuts (especially peanuts, almonds, and walnuts), eggs, chickpeas, lentils, meat, and fish (especially shellfish).
Explanation: