Answer: Greater than 21 °C because heat energy is formed from the energy used in shaking
Explanation: I got this test and i got it right
The temperature of the water will be greater than 21 °C because the shaking converts the kinetic energy into thermal energy. The kinetic energy of the skier at a height of 60 meters is 20,000 units.
Explanation:The law of conservation of energy states that energy cannot be created or destroyed, only transformed from one form to another. In the experiment described, the shaking of the flask converted the kinetic energy of the students' motions into thermal energy, thereby increasing the temperature of the water. Therefore, the temperature of the water after shaking will be greater than 21 °C because heat energy is formed from the energy used in shaking.
The kinetic energy of the skier can be calculated by subtracting the potential energy at the height of 60 meters from the potential energy at the height of 100 meters. Since the potential energy at the height of 100 meters is 50,000 units and the potential energy at the height of 60 meters is 30,000 units, the difference is 20,000 units. Therefore, the kinetic energy of the skier at a height of 60 meters is 20,000 units.
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What is the volume of a salt crystal measuring 5.44 x 10 ^ - 2 m by 2.5 x 10 ^ - 3 m by 7.9 x10-^ 3 m ?
Answer:
The volume of a salt crystal with the mentioned dimensions is V= 107.44 x 10^-8.
Explanation:
To solve this problem we multiply the length of the sides of the crystal. To calculate this product you have to calculate:
1) (5.44 x 2.5 x 9,9). and
2) (10^-2 x 10^-3 x 10^-3). Here we have the product of powers of equal base so we should sum the exponents.
⇒(10^-2 x 10^-3 x 10^-3) = 10^(-2 + -3 + -3) ⇒ (10^-2 x 10^-3 x 10^-3) = 10^-8.
Finally,
V= (5.44 x 10^-2)x (2.3 x 10^-3) x (7.9 x 10^-3) ⇒ V= 107.44 x 10^-8 m.
A 0.5895-g sample of impure magnesium hydroxide is dissolved in 100.0 mL of 0.2050 M HCl solution. The excess acid then needs 19.85 mL of 0.1020 M NaOH for neutralization. Calculate the percent by mass of magnesium hydroxide in the sample, assuming that it is the only substance reacting with the HCl solution. (Can some please show all the steps to this with the answer? I’m completely lost).
Answer:
91.38 %
Explanation:
First we use the following formula to calculate the number of moles of HCl and NaOH contained in the solutions:
molar concentration = number of moles / solution volume
number of moles = molar concentration × solution volume
number of moles of HCl = 0.2050 × 100 = 20.5 mmoles
number of moles of NaOH = 0.1020 × 19.85 = 2.02 mmoles
reaction between NaOH and HCl:
NaOH + HCl → NaCl + H₂O
If 2.02 mmoles of NaOH were used for neutralization of HCl left from the reaction, which are 2.02 mmoles of HCl, it means that the HCl reacted with Mg(OH)₂:
20.5 - 2.02 = 18.48 mmoles of HCl
2 HCl + Mg(OH)₂ = MgCl₂ + 2 H₂O
From the chemical reaction we devise the following reasoning:
if 2 mmoles of HCl react with 1 mmole of Mg(OH)₂
then 18.48 mmoles HCl react with X mmoles of Mg(OH)₂
X = (18.48 × 1) / 2 = 9.24 mmoles of Mg(OH)₂
now the mass of Mg(OH)₂:
mass = number of moles × molecular weight
mass of Mg(OH)₂ = 9.24 × 58.3 = 538.7 mg = 0.5387 g
Now the percent by mass of magnesium hydroxide Mg(OH)₂ in the impure sample (purity):
purity = (mass of pure Mg(OH)₂ / mass of impure sample) × 100
purity = (0.5387 / 0.5895) × 100
purity = 91.38 %
To calculate the percent by mass of magnesium hydroxide in the sample, determine the number of moles, and multiply by 100 to get the percent.
Explanation:To calculate the percent by mass of magnesium hydroxide in the sample, we need to determine the number of moles of HCl that reacted with the magnesium hydroxide. We can use the stoichiometry of the reaction to find the moles of magnesium hydroxide. Then, we can divide the mass of magnesium hydroxide by the mass of the sample and multiply by 100 to get the percent.
The balanced chemical equation for the reaction is:
Mg(OH)2(s) + 2HCl(aq) → MgCl2(aq) + 2H2O(l)
Using the molar ratio from the balanced equation, we can calculate the number of moles of magnesium hydroxide:
2 moles of HCl react with 1 mole of Mg(OH)2
moles of Mg(OH)2 = moles of HCl * (1 mole of Mg(OH)2 / 2 moles of HCl)
Finally, we can calculate the percent by mass of magnesium hydroxide in the sample:
Percent by mass = (mass of magnesium hydroxide/mass of sample) * 100%
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According to gay-lussac’s law if the temperature of has increases what happens to the pressure
According Gay-Lussac's law, if the temperature of has increases, the pressure of the gas increases.
Gay-Lussac's lawGay-Lussac's law states that, as long as the volume of the container containing the gas is constant, as the temperature increases, the gas molecules move faster. Then the number of shocks against the walls increases, that is, the pressure increases. That is, the pressure of the gas is directly proportional to its temperature.
SummaryWhen there is a constant volume, with increasing temperature, the pressure of the gas increases. And when the temperature is decreased, gas pressure decreases.
Finally, if the temperature of has increases, the pressure of the gas increases.
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Gay-Lussac's law, or Amontons's law, explains that the pressure of a gas increases with its temperature if its volume remains constant. This is due to increased kinetic energy leading to stronger, more frequent collisions against container walls.
Explanation:Gay-Lussac's law, also known as Amontons's law, asserts the relationship between pressure and temperature in a gas, holding volume constant.
If the temperature of a gas is increased, the pressure increases
as a result. This increase is due to the gas molecules having greater kinetic energy, leading to faster speeds and more forceful collisions against the container walls. These more frequent and powerful collisions raise the pressure.
Gay-Lussac's law, mathematically, can be written as P proportional to T or P = constant × T
, where P is pressure, T is temperature, and the gas volume is constant. Conversely, Charles's law explains that if we allow the volume to adjust (not held constant), the pressure may maintain constant even with increased temperature.
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Which type of force will an object move towards?
O weakest
O balanced
O strongest
O net
The net force is the force that determines the direction of the object's movement based on the overall influence of all forces present.
Net force is the type of force that an object will move towards. When the net force is present, it indicates the overall force that influences the object's motion. For example, in a scenario where forces are equal but opposite, resulting in a balanced state, the net force is zero.
An atom of argon rarely bonds to an atom of another element because an argon atom has
Answer:
The answer to your question is below: 8 electron in its outer most shell.
Explanation:
Argon like noble gases are stable elements that means that they do not react with other elements. They have eight electrons in their outermost shell; Elements are stable when they reach 8 electronsin their outer most shell, some elements reach 8 electrons receiving from others (nonmetals) and others donate electrons ( metals).
Which type of electromagnetic radiation has a longer wavelength than visible light?
Gamma rays
Infrared radiation
Ultraviolet radiation
X‒rays
Answer:
Explanation:
The wavelenght of a electromagnetic radiation is related with it's energy.
The longer the wavelenght the lower the energy.
The ekectromagnetic radiation that have an energy larger than the visible light is Gamma Rays, x-rays and ultraviolet radition, so it have a shorter wavelenght.
And the Infrared Radiation has an energy smaller than the visible light, having a longer wavelenght.
3. A certain paint has a density of 0.914 g/mL. You need to cover a wall that is 7.6
meters long and 2.74 meters wide with a layer of paint that is 0.13 mm thick. What
volume of paint (in liters and gallons) is required? What is the mass (in grams and
pounds) of the paint layer?
How do i set this up?
Answer:
1) a) the volume in liters = 2.7 liter
b)the volume in gallons = 0.7132645414 gallons
2) a) the mass= 2467.8 g
b) mass in pounds = 5.4 pounds
Explanation:
1) first we need to get the volume in m^3 by using the following format:
volume = the area of the wall * the thickness of the wall
when the area = the long * the wide
so by substitution:
volume = ( 7.6 m *2.74 m ) * 0.00013 m
= 0.0027 m^3
a) when 1 m^3 = 1000 liters
so the volume in liters = 0.0027 * 1000 = 2.7 liter
b) when 1 m^3 = 264.172 gallons
so the volume in gallons = 0.7132645414 gallons
2) the mass formula is:
mass = the volume * density
= 2700 ml * 0.914 g/mL
= 2467.8 g = 2.467 Kg
1 g = 0.00220462 pounds
so mass in pounds = 5.4 pounds
Nathaniel's favorite food
is microwave popcom.
He can't stand to see
unpopped kernels in the
bottom of the bag. The
next time Nathaniel
goes to the grocery
store he buys all brands
of microwave popcom.
He wants to find out if a
certain brand of
popcom leaves less
kemels than the one
he's been eating
3. What is the
independent variable?
4. What is the
dependent variable?
5. Write a hypothesis.
Answer:
independent variable is unpopped corn the dependent is al kinds of brands of popcorn.
Explanation:
Answer:
Explanation:
"Nathaniel's favorite food is microwave popcorn. He loves microwave popcorn so much he can't stand to see unpopped kernals in the bottom of the bag. Nathaniel thinks to himself when this happens, "Thos ...?"
How is an element different than a compound? Give an example of each
Answer:
A compound contains atoms of different elements chemically combined together in a fixed ratio. An element is a pure chemical substance made of same type of atom.
Answer:
compound is made up of 2 or more elements, while element is just pure element
a simple example would be that 2 is an element while 2+3 is a compound
or O(oxygen) is an element while CO2 (carbon dioxide) is a compound
Which particles make up the nucleus of an atom?
A. protons and electrons
B. neutrons and electrons
C. protons only
D. protons and neutrons
E. neutrons only
D. Protons and neutrons.
Happy to help! Please mark as BRAINLIEST! Thanks
Answer:
protons and nuetrons
Explanation:
solubility can be used to purify substances
Answer:no, i dont think so
Explanation: Solubility is the property of a solid, liquid or gaseous chemical substance called solute to dissolve in a solid, liquid or gaseous solvent. however it depends on the physical and chemical properties of the solute and solvent as well as on temperature, pressure and presence of other chemicals
sauce: wikipedia XD
A farmer wants to know if a new pesticide will produce better tomatoes than
his old pesticide. Which of the following is the best hypothesis to use to
address his question?
O
A. Using the new pesticide makes the tomato plants grow taller than
using the old pesticide.
O
B. Using the new pesticide is better for the environment than using
the old pesticide.
O
C. Using the new pesticide is less expensive than using the old
pesticide.
O
D. Using the new pesticide produces bigger tomatoes than using the
old pesticide.
Answer:
D. Using the new pesticide produces bigger tomatoes than using the
old pesticide.
Explanation:
This hypothesis is best to test for the effect of the new pesticide on the tomato plant.
A pesticide is chemical formulation used to kill pests of farm crops.
Pests prevents the healthy and proper growth of plants thereby resulting in poor yield on the farm.
For the farmer to ascertain the effect of the pesticide on his farm crop, he must compare the yield of his produce. Some tomato might grow well but would not bear good fruit. If the farmer focuses on the fruit produced, he would have derieved a good hypothesis in his experiment.
Answer:
D.
Explanation:
did test
Which situation is an indication that a chemical change has occurred?
A. A gas is formed.
B. No heat is released.
C. The temperature does not change.
D. No color change occurs.
Heat is released.
When a chemical change occurs, energy comes out of the atoms which causes heat.
Answer: Option (A) is the correct answer.
Explanation:
Chemical changes are defined as the change which tend to show difference in chemical composition of a substance.
For example, toxicity, reactivity, combustion etc are all chemical properties.
So, in the given situation formation of bubbles shows that a gas has been formed which is a chemical change.
A chemical change will always lead to the formation of a new compound and this change is irreversible in nature by any physical means.
On the other hand, a change which is unable to bring any difference in chemical composition of a substance is known as a physical change.
For example, change in shape, size, mass, volume etc are all physical properties.
Thus, we can conclude that a gas is formed is an indication that a chemical change has occurred.
An antacid tablet added to a glass of water fizzes and bubbles as it mixes.
Which of the indicators of a chemical change is represented in this scenario?
A) formation of a precipitate
B) change in energy
C) formation of a gas
D) change in color
Answer:
B is wrong
Explanation:
I took a test just now and got it wrong
The indicators of a chemical change are represented in this scenario is the formation of a gas.
What is a chemical change?A chemical change is a change in the substance's chemical properties and its physical properties. The chemical changes show that a chemical reaction occurred.
Thus, the correct option is C) formation of a gas.
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An IV of distilled (pure) water could be dangerous, even deadly to a person. Explain this in terms of the
GIF. Be detailed.
An IV of distilled (pure) water can be dangerous because it disrupts the body's osmotic balance, causing cells to swell and potentially burst due to water moving into them from the bloodstream, leading to cell damage or death. Additionally, it can dilute blood electrolytes, resulting in a life-threatening condition called hyponatremia, with symptoms like nausea, confusion, seizures, and even coma or death.
As a result, the distilled water will have a much lower solute concentration compared to the surrounding cells and blood. According to the principles of osmosis, water molecules will move from an area of lower solute concentration (the bloodstream) to an area of higher solute concentration (inside cells). This influx of water into cells can cause them to swell and potentially burst, leading to cell damage or death.Furthermore, this sudden influx of water into the bloodstream can dilute the electrolytes in the blood, leading to a condition called hyponatremia, which can be life-threatening. Symptoms of hyponatremia include nausea, vomiting, confusion, seizures, and, in severe cases, coma and death.In summary, introducing pure distilled water into the bloodstream disrupts the body's osmotic balance, leading to cell damage and potentially fatal electrolyte imbalances. This is why medical professionals always use specially formulated IV solutions with the appropriate solute concentrations to maintain the body's equilibrium.For more such questions on water
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Platinum has a density of 21.45 G / CC. gold has a density of 19.3 G / CC.
a) which is larger 100 gram cube of platinum or a hundred grand cube of gold?
b) what is the length of each side of a 100 gram cube of platinum?
Answer:
The answer to your question is:
a) The gold cube is larger.
b) lenght = 1.67 cm
Explanation:
Data
Platinum density 21.45 g/cm3 100 gram cube
Gold density 19.3 g/cm3 100 gram cube
Formula
density = mass / volume
a) Calculate volume
volume = mass / density
Platinum volume = 100 / 21.45 = 4.66 cm3
Gold volume = 100 / 19.3 = 5.18 cm3
b) Volume = lenght³
4.66 cm³ = lenght³
lenght = ∛4.66
lenght = 1.67 cm
A 100-gram cube of gold would be larger than a 100-gram cube of platinum because gold has a lower density than platinum. The length of each side of a 100-gram cube of platinum would be approximately 1.67 cm.
Explanation:Answer:
a) Which is larger, a 100-gram cube of platinum or a 100-gram cube of gold?
The gold cube would be larger. This is because gold has a lower density than platinum, meaning that a certain mass of gold will occupy a larger volume than the same mass of platinum.
b) What is the length of each side of a 100 gram cube of platinum?
To answer this, you would first calculate the volume of the cube using the density and mass. The formula to do this is mass/density = volume. So, 100 grams / 21.45 g/cm³ = approximately 4.66 cm³. Now, because it is a cube and all sides are equal, take the cube root of this volume to get the length of each side. The cube root of 4.66 cm³ is about 1.67 cm. Thus, each side of the 100 gram platinum cube would be approximately 1.67 cm.
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What is the net force acting on the box
Answer:
According to Mr. Newton, an object will only accelerate if there is “net force” acting upon it. A net force is the sum of all forces acting on an object. A net force is capable of accelerating a mass.
Explanation:
Which statements below are an appropriate hypothesis in response to this question? Check all that apply. If a substance changes state of matter (e.g., liquid to gas), then this is a physical change because the original properties of the substance have not changed. If a substance undergoes a physical change, then it will retain most of its original properties because no new substance is formed. If a substance undergoes a chemical change, then it will not retain its original properties because a new substance is formed. If a precipitate is formed when two substances are mixed, then a chemical change has taken place because precipitates are new substances.
Answer:
If a substance undergoes a physical change, then it will retain most of its original properties because no new substance is formed.
If a substance undergoes a chemical change, then it will not retain its original properties because a new substance is formed.
Explanation:
So in shorter words its options 2 and 3
All four statements are appropriate hypotheses reflecting the distinctions between physical and chemical changes. Physical changes involve alterations in the state or form without changing the chemical identity, whereas chemical changes result in the creation of new substances.
Explanation:When addressing the question regarding whether certain statements about physical and chemical changes are appropriate hypotheses, it's important to recognize that an appropriate hypothesis should be testable and based on scientific concepts. The statements provided can be evaluated based on our understanding of physical and chemical properties and changes.
If a substance changes state of matter (e.g., liquid to gas), then this is a physical change because the original properties of the substance have not changed.If a substance undergoes a physical change, then it will retain most of its original properties because no new substance is formed.If a substance undergoes a chemical change, then it will not retain its original properties because a new substance is formed.If a precipitate is formed when two substances are mixed, then a chemical change has taken place because precipitates are new substances.These statements align with the fundamental distinctions between physical and chemical changes. A physical property change affects the form but not the chemical identity of a substance, whereas a chemical property change results in the formation of a new substance.
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put the following metric units in order from smallest to largest: pL, mL, dL, kL.
Answer:
Explanation:
These are multiples and submultiples of the unit liters.
pL, mL, dL and kL
pL<mL< dL< kL
Units can be expressed in form of multiples and submultiples form using the following prefixes:
Note: submultiples are lower than multiples:
submultiples 10⁻¹ deci(d)
10⁻³ milli(m)
10⁻¹² pico(p)
multiples 10 deca(da)
10³ kilo(k)
When an Adam that has no charge loses two electrons what does it become
Answer:
See below.
Explanation:
It becomes and ion with 2 positive charges:
For example: Mg - 2e ---> Mg2+.
Which example is a way that intercellular communication occurs?
A: A molecule is sent through the plasmodesmata of a plant cell.
B: A molecule is transmitted from one part of a cell to another to cause a response.
C: A signal is translated into action for a muscle cell to contract.
D: A signal is sent down an exon within a nerve cell.
CORRECT Answer:
A molecule is sent through the plasmodesmata of a plant cell.
Explanation: K12 test.
I got it wrong because the other person who answered this question answered wrong so he/she made me get it wrong. :( :( :( :( :( :(
Multicellularity depends on intercellular communication. The membrane-lined channels known as plasmodesmata (PD) connect the cytoplasm of neighboring cells in plants, enabling direct molecular exchange. Thus, option A is correct.
What is role of plasmodesmata in plant cells?When it comes to intercellular trafficking, communication, and signaling for plant development and defense.
These pathways, referred to as plasmodesmata, enable chemicals to move freely between cells, allowing plants to grow regularly and form tissues and organs.
Plasmodesmata—intercellular pores that connect adjacent plant cells and permit membrane and cytoplasmic continuity—are crucial.
Therefore, A molecule is sent through the plasmodesmata of a plant cell.
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Compared to the entire atom ,the nucleus of the atom
Answer:
C- smaller and contains most of the atom's mass.
Compared to the entire atom, the nucleus of the atom is:
C. Smaller and contains most of the atom's massAn atom is the tinitest way a matter can be broken down into. Atoms can either be negatively or positively charged. An atom is made up of:Protons (positive charge)Electrons (negative charge)Neutrons (no charge)The nucleus of an atom is the part of the atom that contains the protons and the neutrons at the middle of the atom.The mass of an atom is the size of the atom and the SI unit is measured in kilograms.As a result of this, when compared to the entire structure of the atom, the nucleus of the atom is smaller,but contains most of the mass of the atom.Therefore, the correct answer is option C.
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How many magnesiums, Oxygens and hydrogens does Mg(OH)2 have?
Describe the composition of common amino acids.
Answer:
Explanation:
Amino acids consist of an amine (-NH2) group and a carboxyl acid (-COOH) group. So they have elements such as Nitrogen (N), Hydrogen (H), Carbon (C) and Oxygen (O).
Amino acid composition:
NitrogenCarbonHydrogenOxygenThe human body has 20 amino acids which are all important but there are only 9 that are essential for the human body.
Best of Luck!
28.5g of iron shot is added to a graduated cylinder containing 45.50 mL of water. The water level rises to 49.10mL mark, From this info, calculate the density of iron.
Answer:
The answer to your question is: density = 7.92 g/ml
Explanation:
data
mass of iron = 28.5 g
volume of water = 45.5 ml
volume of the iron = 49.1 - 45.5 = 3.6 ml
Formula
density = mass / volume
density = 28.5 / 3.6 substitution
density = 7.92 g/ml
The density of iron is 7.92 g/mL.
Explanation:To calculate the density of iron, we need to use the formula:
Density = Mass / Volume
Given that the mass of the iron shot is 28.5g, and the volume of water is the difference in the water level before and after adding the iron shot, which is (49.10 mL - 45.50 mL = 3.60 mL), we can substitute the values into the formula:
Density = 28.5g / 3.60 mL = 7.92 g/mL
Therefore, the density of iron is 7.92 g/mL.
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Which step of the scientific method involves obtaining resources for your question
Answer:
c-do background research.
Explanation:
The scientific methods exposes the way scientists carry out their investigation and how findings are reported and at times discarded. It is systematic way of studying perceived observations in the environment.
During the course of an investigation, scientists may seek to find out about the prevailing knowledge about a phenomena and the level of research that might have been done in that regard. It is proper for such a scientist to do a background research by searching for related journals and publications in that field.
The equation below shows the products formed when a solution of silver nitrate (AgNO3) reacts with a solution of sodium chloride (NaCl).
AgNO3 + NaCl → NaNO3 + AgCl
(Reactants) → (Products)
In this equation, the total mass of the reactants is
A) equal to the mass of AgCl.
B) less than the mass of AgCl.
C) equal to the total mass of the products.
D) greater than the total mass of the products.
The total mass of the reactants in the reaction between silver nitrate and sodium chloride is equal to the total mass of the products, demonstrating the law of conservation of mass. Option C is correct.
The law of conservation of mass as it applies to the reaction between silver nitrate (AgNO₃) and sodium chloride (NaCl). The reaction equation is:
AgNO₃ (aq) + NaCl (aq) → AgCl (s) + NaNO₃ (aq)
According to the law of conservation of mass, the total mass of the reactants will always be equal to the total mass of the products. This is because during a chemical reaction, matter is neither created nor destroyed, it is simply rearranged.
Thus, if the reaction starts with a certain mass of silver nitrate and sodium chloride, these will rearrange to form the same total mass of silver chloride and sodium nitrate.
Therefore, the correct answer is C.
oh god i swear i'm usually not this dumb but pls help!
A group of students is investigating whether copper is a better thermal conductor than steel. The students take a copper wire and a steel wire of the same length and diameter. They put equal lengths of wax on one end of each wire and dip the other end into a beaker of hot water. The length of wax left on the wires after 10 minutes is shown.
Experimental Observations:
Copper:
Original Length of Wax: 3cm
Length of Wax After 10 Minutes: 0.7cm
Steel:
Original Length of Wax: 3cm
Length of Wax After 10 Minutes: 1.8cm
What was the dependent variable in this experiment?
Type of wire used
Original length of wire
Original length of wax
Thermal conductivity of wire
i think it's c??
Answer:
Thermal Conductivity
Explanation:
The dependent variable is what is being measured in the experiment and it's affected by the independent variable. Thermal conductivity is the best answer, because you are trying to find out which wire is a better conductor of thermal conductivity. Basically, which one conducts more heat? The copper does, because when its put into the hot water it melted more of the wax than the steel wire did.
Answer: Thermal conductivity of wire
Explanation:
The hypothesis of the experiment is to find the thermal conductivity of the the wires. The independent variable in the experiment is the type of wire used.
There are two types of wire used in the experiment one is copper and other one is steel. Rest all the variables are control variable.
At the end of the experiment the thermal conductivity was determined. This is the dependent variable of the experiment.
Hence, the correct answer is option D
Ammonium phosphate ((NH4)3 PO4) is an important ingredient to many fertilizers. It can be made by reacting phosphoric acid (H3 PO4) with ammonia (NH3)
What mass of ammonia phosphate is produced by the reaction of 5.24 g of ammonia?
Answer:
15.35 g of (NH₄)₃PO₄
Explanation:
First we need to look at the chemical reaction:
3 NH₃ + H₃PO₄ → (NH₄)₃PO₄
Now we calculate the number of moles of ammonia (NH₃):
number of moles = mass / molecular wight
number of moles = 5.24 / 17 = 0.308 moles of NH₃
Now from the chemical reaction we devise the following reasoning:
if 3 moles of NH₃ are produce 1 mole of (NH₄)₃PO₄
then 0.308 moles of NH₃ are produce X moles of (NH₄)₃PO₄
X = (0.308 × 1) / 3 = 0.103 moles of (NH₄)₃PO₄
mass = number of moles × molecular wight
mass = 0.103 × 149 = 15.35 g of (NH₄)₃PO₄
A pressure cooker contains 0.355 mole of air, which occupies a volume of 5.68 liters. The temperature inside the pressure cooker is 394 K. What is the absolute pressure of the air in the pressure cooker? The pressure of the air is pascals.
Answer:
The pressure of air is 204848.75 pascal.
Explanation:
Given data:
Moles of air = 0.355 mole
Volume of air = 5.68 L
Temperature = 394 K
Solution:
We will solve this problem by using ideal gas equation i.e.
PV = nRT
R is the ideal gas constant = 0.0821 L. atm / mol.K
Now we will put the values in equation,
PV = nRT
P = nRT / V
P = (0.335 mol × 0.0821 L. atm / mol.K × 394 K ) / 5.68 L
P = 11.483 L . atm / 5.68 L
P = 2.0217 atm
Now we will convert the atm into pascal.
1 atm = 101325 pa
2.0217 × 101325 = 204848.75 pa
Answer:
The problem can be solved using Ideal gas Equation
PV = nRT
P = Pressure in atm (can be converted to pascals)
V = Volume in Liters
N stands number of moles
R is the gas constant 0.08206 L atm [tex]K^{-1} mol^{-1}[/tex]
T is the temperature in kelvin
[tex]$P=\frac{n R T}{V}=\frac{0.355 \mathrm{mol} \times 0.08206 \mathrm{LatmK}^{-1} \mathrm{mol}^{-1} \times 394 \mathrm{K}}{5.68 \mathrm{L}} $$P=2.021 \mathrm{atm} $[/tex]
We know 1 atm = 101.325 kilo pascals = 101325 pascals
[tex]$2.021 {atm} \times \frac{101325 \text { ascals }}{1 \text { atm }}=204750 \text { Pascals } $$=2.05 \times 10^{5} \text { Pascals (Answer) } $[/tex]