The volume of object is 0.99 L
Here, the given mass of the object is 30.30g
Given density of the object is 30.32g/L
Density = Mass / volume
⇒ volume = mass/density
=30.30g / 30.32g/L
=0.99 L
Density is the measures how tightly a material is packed together.
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If a soccer ball's mass is 5 kg and a player who weighs 50 kg kicks the soccer ball forward with a force of 5 N, how much
force does the ball exert on the player's foot and in what direction? (1 point)
O 10 kg/N backward
O 100 kg forward
O 5 N backward
O 5 N forward
If a soccer ball's mass is 5 kg and a player who weighs 50 kg kicks the soccer ball forward with a force of 5 N , 5 N force does the ball exert on the player's foot and in backward direction .
The four forces are gravity, normal force , friction force, and applied force. When the ball is kicked or kicked by player , when a player leaps into the air to avoid a tackle or grab the ball, and when a player leaps into the air to catch the ball , Force of Gravity is continuously at work in football .
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Answer:
Explanation:
1.) A car’s engine provides a forward force of 2000 N while the force of air resistance is 800 N in the opposite direction. With what force will the car move, and in which direction?
ANSWER: 1200 N forward
2.) Two movers are attempting to push a couch up a ramp. One mover applies a force of 80 N to the right, but the force of friction between the couch and the ramp is providing a force of 110 N in the opposite direction, and the couch slides down the ramp. At minimum, how much force will the second mover need to apply to help push the couch up the ramp?
ANSWER: 31 N
3.) A group of students conduct an experiment to study Newton’s second law of motion. They applied a force to a toy car and measure its acceleration. The table shows the results.
Force (N) Acceleration (m/s²)
2.0 5.0
3.0 7.5
6.0 15.0If the students graph the data points, which conclusion will they be able to make?
ANSWER: The data points will fall along a line. This shows that as the force increases, the acceleration increases.
4.) In the experimental setup shown, a car has one end of a string attached to it, and the other end is attached to a fixed number of metal discs. The car moves along the table and two probes sense the motion of the car. The probes send information to a computer that displays the acceleration and velocity of the experiment. When looking at these results, which quantity stays constant during the trials?
ANSWER: mass
5.) Imagine a scenario in which an animal's force is pushing itself forward 5 N, friction is pushing it 4 N backward, gravity is pushing the animal 10 N down, and the animal is pushing itself 10 N up. Describe the movement of the animal.
ANSWER: It only moves forward because there is a net force forward.
6.) Two rockets with the same mass are accelerated. Rocket A accelerates twice as quickly as rocket B. Which statement is correct?
ANSWER: The motor in rocket A is twice as powerful as the motor in rocket B.
7.) A model rocket has a mass of 0.2 kg, with a motor that can provide a force of 100 N. A second model rocket is being built with the same motor, but it is being designed to accelerate half as much as the first rocket. What kind of change can be made in the design to achieve this objective?
ANSWER: The mass of the second rocket should be 0.4 kg.
8.) Five motorboats are being tested to see which reaches the highest velocity in the same amount of time. After graphing the acceleration versus force for each motorboat, the graph is a sloped line with a y-intercept of zero. Which statement is correct about these motorboats?
ANSWER: All five motorboats have the same mass, which can be calculated from the graph.
9.) If a soccer ball’s mass is 5 kg and a player who weighs 50 kg kicks the soccer ball forward with a force of 5 N , how much force does the ball exert on the player’s foot and in what direction?
ANSWER: 5 N backward
10.)
A toy helicopter flies forward with a force of 15 N into an oncoming wind of 10 N. The force of gravity pulls the helicopter down with a force of 5 N, but the propeller is providing an upward force of 10 N. Which of the following accurately describes the helicopter’s force?
ANSWER: The toy helicopter is flying forward with a force of 5 N and upward with a force of 5 N.
11-15 are short answer questions but I hope this helps whoever needs it <3
After observing substance 1 in liquid, gaseous, and solid states, describe the connection between those states and the thermal energy that was applied or taken away from the substance as the temperature was changed.
For the given substance when thermal energy was applied the change of state that occurred was from solid to liquid, to gas state, and when heat was taken away from the substance, the substance moved from gas to liquid, to solid state.
What is change of state?Change of state refers to the process whereby matter changes from one state to another as heat is added or removed from a substance.
When heat is added to a substance, the particle changes from a more ordered state such as solid or liquid, to a less ordered state such as liquid or gas.
On the other hand, heat is removed from a substance, the particle changes from a less ordered state such as gas or liquid, to a more ordered state such as liquid or solid.
A give substance can exists either in the solid, liquid, or gaseous state depending on the temperature.
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For the peptide Ala-Arg-Lys-Ala-Asn-Ser-Ala-Ser, what would be the expected charges at pH 1, 7, and 13?
The peptide Ala-Arg-Lys-Ala-Asn-Ser-Ala-Ser, the expected charges at pH 1, 7, and 13 is +3, +2, -1.
What are peptides?
Peptides can be defined as a single linear chain of many amino acids, held together by an amide bonds. It can also be defined as a naturally occurring short chain of amino acid monomer connected by an amide bonds.
The amino acid and other molecular are connected to one another in a sequence by a bond is called peptide bonds.
Peptides make bond and make certain proteins which are very essential for growth and development of human body.
In peptide Ala-Arg-Lys-Ala-Asn-Ser-Ala-Ser ionizing groups are present.
There are four ionizing groups are present
The amino groupThe Arginine R groupThe Lysine R group andThe carboxyl groupThus, the peptide Ala-Arg-Lys-Ala-Asn-Ser-Ala-Ser, the expected charges at pH 1, 7, and 13 is +3, +2, -1.
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4) A pure metal and an interstitial alloy containing the same metal were examined. Predict which
substance will have a greater density and justify your selection.
The interstitial alloy would be more dense than the pure metal.
What is density?Density is the ratio of the mass to the volume of an object. Now we know that the more dense the object is the more the atoms of the object are packed together.
An alloy is a combination of two or more metals. This implies that in an alloy we are certainly going to have more elements packed into a smaller space than in a pure metal. The pure metal contains only one type of atoms but the alloy contains more than one type of metal atoms packed into a small space.
Thus, the interstitial alloy would be more dense than the pure metal.
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What is the ph scale including acid and base number ranges
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How many Carbon atoms are there in a 132g sample of (NH4)2CO3
There are 131×10²¹ carbon atoms in 132 g sample of ammonium carbonate.
How to calculate number of atoms in a compound?
Number of atoms in a compound can be calculated as first finding the number of moles of the element in the compound and then multiplying it by the Avogadro's number to get the number of atoms.
In the question given , to calculate the number of carbon atoms in 132 g of ammonium carbonate,first the number of moles of carbon in ammonium carbonate are calculated as,
96.09 g ammonium carbonate has 12 g carbon ,therefore 132 g ammonium carbonate will have ,
132×12/96.09=16.48 g of carbon.
To find the number of moles of carbon in 132 g ammonium carbonate,mass of carbon is multiplied by mass of ammonium carbonate to get number of moles of carbon.
16.48 g of carbon÷132 g/moles of carbon
moles of carbon=16.48×132=2175.36 moles
The number of atoms are calculated by multiplying number of moles and Avogadro's number.
=2175.36×6.022×10²³
=131×10²¹
Thus, there are 132×10²¹ atoms of carbon in 132 g of ammonium carbonate.
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Unless otherwise informed report each
numerical answer in standard notation to 3
significant figures. point Pick the choice that
is the most reasonable metric measurement
for the mass of a bullet
a)420 mL
b) 420 ng
c)420 Gg
d)420 g
e)420 cg
How many Al3+ ions are there in 0.500 g of Al2(SO4)3?
The number of particles of Al³⁺ present in the given compound is 1.76 x 10²¹ ions.
Mass of the aluminum ion
The mass of the aluminum ion in the given compound is calculated as follows;
Al₂(SO₄)₃ ⇄ 2Al³⁺ + 3SO₄²⁻
mass of Al₂(SO₄)₃ = 342.15 g
number of 0.5 g = 0.5/342.15 = 0.00146 mole
from the reaction equation above;
1 mole of Al₂(SO₄)₃ = 2 moles of Al³⁺
0.00146 mole = ?
= (0.00146 x 2)/1
= 0.00292 mole
1 moles of ion = 6.02 x 10²³ particles
0.00292 moles = ?
= 1.76 x 10²¹ ions
Thus, the number of particles of Al³⁺ present in the given compound is 1.76 x 10²¹ ions.
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calculate the value at Kc for the hypothetical reaction
Kc for the hypothetical reaction is 1.5×10⁻⁵
Kc is the ratio of the equilibrium concentrations of products over the equilibrium concentrations of reactants each raised to the power of their stoichiometric coefficients.
Given reaction is
4M(g) ⇄ 2Z(g) Kc =6.58×10⁻³
2Z(g) ⇄ 4Q(g)+8X(g) Kc =2.07×10⁻²
So for finding another Kc of that given reaction is Q(g)+2X(g) ⇄ M(g)
To find Kc the formula is [M]m/[Q]q[X]x for Q=8.66
Put the given value 6.58×10⁻³/8.66×2.07×10⁻²
= 1.5×10⁻⁵
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Brainliest! +10pts
In this lab we first mixed some liver with hydrogen peroxide in test tube #1 and observed foaming letting it completely react. Then we poured off the remaining liquid into a second test tube #2. Next we added fresh liver to test tube #2 and no reaction (foaming) occurred because;
A)The liquid in test tube #2 was Oxygen.
B)The liquid in test tube #2 was water.
C)The liquid in test tube #2 was Hydrogen peroxide.
D)The liquid in test tube #2 was Catalase.
It's not going to react in test tube #2 because D) the liquid in test tube #2 was catalase.
What is catalase?Catalase is an enzyme that is an antioxidant and its function is the deamination of hydrogen peroxide into oxygen and water. This enzyme needs a heme group and manganese as a cofactor. So that's why tube #2 will not have a reaction (foaming) since it will contain catalase that catalyzes hydrogen peroxide.
Therefore, we can confirm that it's not going to react in test tube #2 because D) the liquid in test tube #2 was catalase.
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Find the molarity of 0.600 mol of BaCl2 in 100.0 mL of solution
The molarity of a 0.600 mol of BaCl₂ in 100.0 mL of solution is 6M.
How to calculate molarity?Molarity is the concentration of a substance in solution, expressed as the number moles of solute per litre of solution.
The molarity of a solution can be calculated by dividing the number of moles by the volume as follows:
Molarity = no of moles ÷ volume
According to this question, 0.600 moles of BaCl₂ in 100.0 mL of solution. The Molarity can be calculated as follows:
Molarity = 0.600 mol ÷ 0.100 L
Molarity = 6M
Therefore, the molarity of a 0.600 mol of BaCl₂ in 100.0 mL of solution is 6M.
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What is the uncertainty in the position, Δx, of an electron moving near the nucleus at 6.00×106 m/s? Assume the relative uncertainty in the speed of the electron, Δv, is 1%; that is, 6.00×104 m/s. Report your answer in meters.
The uncertainty in the position, Δx, of an electron moving near the nucleus at 6.00×106 m/s is 7.24 x 10⁻¹⁰ m
What is relative uncertainty?Relative uncertainty is the measuring uncertainty fraction by the absolute value of the measured quantity value.
By Heisenberg uncertainty principle,
Δx x Δv = h/(4 xpi x m)
Putting the values in the formula
Δv = 8 x 10⁴ m/s
mass, m = 9.11 x 10⁻³¹ Kg
Putting values,
Δx x (8 x 10⁴) = (6.626 x 10⁻³⁴)/(4 x 3.14 x 9.11 x 10⁻³¹)
Δx x (8 x 10⁴) = 5.791 x 10⁻⁵
Δx = 7.239 x 10⁻¹⁰ m
Therefore, the uncertainty in the position is 7.24 x 10⁻¹⁰ m
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5 μl (microliter) = _____ l (liter)
g hfghhfhfhffhfhhfhffhhffhhfgfgf
this place is for serious matters only not jokes.
You notice the water level in your fish bowl gets lower over time. What change in state is happening? How do you know?
Answer:
Evaporation
Explanation:
Overtime the water is slowly changing its physical state from liquid form to gaseous form in the form of evaporation.
Which of the following generally applies to the noble gases?
a. high ionization energy, low electronegativity, high reactivity
b. low ionization energy, low electronegativity, low reactivity
c. high ionization energy, high electronegativity, high reactivity
d. high ionization energy, low electronegativity, low reactivity
By placing this passage at the beginning of the story, the author builds suspense for the arrival of
.
Heating 235 g of water from 22.6°C to 94.4°C in a microwave oven requires 7.06 × 10^4 J of energy. If the microwave frequency is 2.88 × 10^10 s−1, how many quanta are required to supply the 7.06 × 10^4 J?
3.699×10²⁷ quanta are required to supply 7.06×10⁴ J of energy.
How is quanta of energy calculated?Quanta of energy is calculated by using the Planck's equation which is given as,
E=hυ
where E= energy of radiation
h=Planck's constant
υ=frequency of radiation
Number of quanta can be calculated as.
=energy of radiation/energy required
As per the given data,temperature is not required in solving the problem
required energy =7.06×10⁴
microwave frequency=2.88×10¹⁰s[tex]^-1[/tex]
Energy of radiation is calculated by using Planck's equation,
=6.626×10[tex]^-34[/tex]×2.88×10¹⁰=19.082×10[tex]^-24[/tex] J.
Number of quanta required=7.06×10⁴/19.082×10[tex]^-24[/tex]=3.699×10²⁷
Hence, the number of quanta required is 3.699×10²⁷.
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(a)
As you respond to Part A, Part B, and Part C, follow the directions below.
Address all of the instructions in each prompt.
Use evidence from the information provided and your own knowledge of science to support your responses.
Part A
Describe one way scientists near Lake Tahoe can detect if the lake has been impacted by zebra mussels.
Since then, it has spread to other rivers, colonized them, clogged the water intake pipes, and competed with local species for food. Zebra mussels are the method for removing a lot of plankton from the water column.
The Caspian Sea in Asia is where zebra mussels, or Driessen polymorpha, are found naturally. They arrived in the Great Lakes region in the late 1980s via ballast water from a transatlantic ship. The Great Lakes, Mississippi, Tennessee, Hudson, and Ohio river basins were all overrun by these mussels within ten years. The lake's brilliant blue hue is a result of Tahoe's clean air and water. There is more to this phenomenon than just the fact that Lake Tahoe's surface reflects the sky, which contributes to its blue color.
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An atom has 5 protons, 6 neutrons, and 6 electrons. What is the charge of the atom?
Answer:
1-
Explanation:
the charge of an atom is determined by the number of protons and electrons present, in this case the number of electrons is more than the protons by 1, hence it is a minus 1 charge
Many metallic catalysts, especially precious metal catalysts are deposited as thin films on materials with a very high surface area. Why is this an effective way of utilizing the precious metal? (You can choose more than one)
a. If the catalyst is only present in a very thin layer, not very much is needed. This saves money.
b. Surface-deposited catalysts do not work; the whole catalyst material must be homogenous.
c. The material on which the catalyst is deposited causes alternative reactions to occur which would end up reducing percent yield.
d. Only the surface material reacts, so having the entire material be made of the catalyst is not necessary.
D. only the surface material reacts, so having the entire material be made of the catalyst is not necessary.
How does surface area affect reaction of a catalyst?
Increasing the surface area of a catalyst increases the frequency of collisions and increases the reaction rate.
Several smaller particles have more surface area than one large particle. The more surface area that is available for particles to collide, the faster the reaction will occur.
Thus, it is important way of utilizing the catalyst because only the surface material reacts, so having the entire material be made of the catalyst is not necessary.
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Which of the following is an example of a covalent bond?
a. K-CI
b. AI-CI
c. H-CI
d. Al-Al
Answer:
al - al i think
Explanation:
In their resting state, all body cells exhibit a resting membrane potential ranging from -50 to about +50 millivolts.
Question 21 options:
True
False
In their resting state, all body cells exhibit a resting membrane potential ranging from -50 to about -100 millivolts. So, the statement is false.
What is Body cells?The fundamental units of all living things are cells. There are many billions of cells in a human body.
They give the body structure, consume nutrients from meals, transform those nutrients into energy, and perform certain tasks.
All bodily cells are polarised because they all have a resting membrane potential when they are at rest.
All body cells, depending on the kind of cell, have a resting membrane potential that normally ranges from -50 to -100 millivolts. All cells are considered to be polarised as a result.
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Would someone be able to explain why these answers here are correct? I don't quite understand them and needed some explanation. Thanks
Bromine have two isotopes they are Br-79 and Br-81. these are the two stable isotopes.
So here from the given data, element bromine consists of Br₂ molecules. here they have given three mass spectrum peaks.
Mass spectroscopy detects ions of slightly different masses. the bromine molecules consist of two isotopes that is ⁷⁹Br and ⁸¹Br or maybe more combination of theses.
So from the given masses and and spectra we know that the two isotopes of bromine are ⁷⁹Br and ⁸¹Br. That's why they are given like that in the answer.
Isotopes are those elements which have same number of protons but different number of neutrons.
Because of this in part A the answer is given as ⁷⁹Br, ⁷⁹Br and in part B it is given as ⁷⁹Br ,⁸¹Br. this is the common way of representing the mass number of an element.
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The first ionization energy, , of a helium atom is 2.37×103 kJ/mol . What is the wavelength of light, in nanometers, that is just sufficient to ionize a helium atom?
The wavelength that is sufficient to ionize the helium atom is 510 nm.
What is the ionization energy?Let us recall that the ionization energy is the energy that is required to remove an electron from an atom. The first ionization energy is the energy that is required to remove the first electron from an atom. The electron is often removed from the valence shell of the atom.
We have the following information;
Energy of the electron = 2.37×10^3 kJ/mol * 1 mole/6.02 * 10^23
= 3.9 * 10^-18 J
Now;
E = hc/λ
E = energy of the photon
h = Plank's constant
c = speed of light
λ = wavelength
λ = hc/E
λ = 6.6 * 10^-34 * 3 * 10^8/3.9 * 10^-18 J
λ = 5.1 * 10^-8 m or 510 nm
Hence, the wavelength that is sufficient to ionize the helium atom is 510 nm.
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How many moles (of molecules or formula units) are in each sample?58.32 g CF2Cl2
The number of moles in 58.32 grams of CF₂Cl₂ is 0.48 mole
How to determine the mole of CF₂Cl₂The mole of a substance is related to it's mass and molar mass according to the following equation:
Mole = mass / molar mass
With the above formula, we can determine the mole in 58.32 grams of CF₂Cl₂ as illustrated below:
Mass of CF₂Cl₂ = 58.32 gramsMolar mass of CF₂Cl₂ = 12 + (19 × 2) + (35.5 × 2) = 12 + 38 + 71 = 121 g/mol Mole of CF₂Cl₂ = ?Mole = mass / molar mass
Mole of CF₂Cl₂ = 58.32 / 121
Mole of CF₂Cl₂ = 0.48 mole
Thus, we can conclude that 0.48 mole is present in 58.32 grams of CF₂Cl₂
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What is the frequency
Answer:
The frequency is the rate at which current changes direction per second.
Music is often used to accompany pictures. What type of music would most likely accompany a photo of a fox chasing a rabbit?
A. Slow, Legato, Major Key
B. Upbeat, Fast, Staccato
C. Slow with Fermatas
D. Long and Flowing phrases
Answer:
B. Upbeat, Fast, Staccato
Explanation:
As with any chase between predator and prey, it's going to be fast-paced as both are literally running for their lives.
Potassium chlorate decomposes when heated to produce potassium chloride and oxygen gas: 2 KClO3 (s) à 2 KCl (s) + 3 O2 (g) (a) If a test tube holding 87 g KClO3 is heated and the reaction goes to completion, calculate the volume of O2 gas that will be obtained if it is collected at a pressure of 1 atm and temperature of 27 °C. (Assume ideal gas behavior.)
Taking into account the reaction stoichiometry and the ideal gas law, the volume of O₂ obtained is 26.199 L.
Reaction stoichiometryIn first place, the balanced reaction is:
2 KClO₃ → 2 KCl + 3 O₂
By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:
KClO₃: 2 molesKCl: 2 molesO₂: 3 molesThe molar mass of the compounds is:
KClO₃: 122.55 g/moleKCl: 74.55 g/moleO₂: 32 g/moleBy reaction stoichiometry, the following mass quantities of each compound participate in the reaction:
KClO₃: 2 moles ×122.55 g/mole= 245.1 gramsKCl: 2 moles ×74.55 g/mole= 149.1 gramsO₂: 3 moles ×32 g/mole= 96 gramsIdeal gas lawIdeal gases are a simplification of real gases that is done to study them more easily. It is considered to be formed by point particles, do not interact with each other and move randomly. It is also considered that the molecules of an ideal gas, in themselves, do not occupy any volume.
The pressure, P, the temperature, T, and the volume, V, of an ideal gas, are related by a simple formula called the ideal gas law:
P×V = n×R×T
where:
P is the gas pressure.V is the volume that occupies.T is its temperature.R is the ideal gas constant. The universal constant of ideal gases R has the same value for all gaseous substances.n is the number of moles of the gas.Mass of O₂ formedThe following rule of three can be applied: if by reaction stoichiometry 245.1 grams of KClO₃ form 3 moles of O₂, 87 grams of KClO₃ form how many moles of O₂?
moles of O₂= (87 grams of KClO₃× 3 moles of O₂)÷ 245.1 grams of KClO₃
moles of O₂= 1.065 moles
Volume of O₂ obtainedAssuming ideal gas behavior and knowing:
P= 1 atmn= 1.065 molesR= 0.082 [tex]\frac{atmL}{molK}[/tex]T= 27 C= 300 Kthe volume of O₂ obtained is calculated by the ideal gas law:
1 atm×V = 1.065 moles× 0.082 [tex]\frac{atmL}{molK}[/tex]× 300 K
Solving:
V= (1.065 moles× 0.082 [tex]\frac{atmL}{molK}[/tex]× 300 K)÷ 1 atm
V= 26.199 L
Finally, the volume of O₂ obtained is 26.199 L.
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what are the 8 physical properties of matter
Answer:
color ,hardness,maleabillit,sulubility,electrical,