The mass of dinitrogen tetroxide (N2O4) that contains one billion (1.00 x 10^9) oxygen atoms is approximately 2.53 grams.
To calculate the mass of N2O4 that contains one billion oxygen atoms, we need to consider the molar mass and the stoichiometry of the compound. The molar mass of N2O4 is 92.02 g/mol, which corresponds to the total mass of one mole of N2O4.
First, we determine the number of moles of N2O4 that contain one billion oxygen atoms. Since the formula ratio of N2O4 is 1:2 (one mole of N2O4 contains two moles of oxygen atoms), the number of moles of N2O4 is half the number of moles of oxygen atoms. Therefore, the number of moles of N2O4 is (1.00 x 10^9) / 2 = 5.00 x 10^8 moles.
Next, we calculate the mass of N2O4 by multiplying the number of moles by the molar mass:
Mass = number of moles * molar mass = 5.00 x 10^8 moles * 92.02 g/mol = 4.60 x 10^10 g.
Finally, we round the mass to three significant digits, which gives us approximately 2.53 grams (since 4.60 x 10^10 g = 2.53 g when rounded to three significant digits).
Therefore, the mass of dinitrogen tetroxide (N2O4) that contains one billion oxygen atoms is approximately 2.53 grams.
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How can Newton's second law of motion be represented with an equation?
The greater the objects mass is the greater....(fill in the rest)
Answer: The greater the objects mass is the greater its gravitational force.
Explanation: i got it right:)
Have a blessed day!!!!!
1. How many protons does 9-Zr have? How many neutrons does 92Zr have?
Answer:question1 forty40
the second is fifty one 51
Explanation:
A weather map indicates that a low-pressure system is approaching a city. Attached to
the low-pressure system is a curved line studded with semicircles. Which forecast
can most likely be predicted about the approaching weather system?
O A warm front is approaching the city, and temperatures will decrease.
O A cold front is approaching the city, and temperatures will increase.
O A cold front is approaching the city, and temperatures will decrease.
O A warm front is approaching the city, and temperatures will increase.
Answer:
The correct option is;
A warm front is approaching the city and temperatures will increase
Explanation:
A low pressure forms by the movement of air away from a particular spot such that the pressure reduces. The movement of air away from a spot occurs when there is a boundary of warm and cold air such that the air moves to maintain a uniform temperature.
Low pressure centers are associated with warm fronts, resulting in the fall of barometric pressure or observed low pressure and are characterized by a rise in temperature.
PLEASE HELP ASAP Do NOT give me a random gibberish answer or else I might report you!!
If you were camping in a rainforest for two days, your presence would cause many changes to the surroundings. Describe two physical and two chemical changes that could occur as a result of your experience.
So, all I need you to do is to give me two physical and two chemical changes that could occur while camping in the rainforest.
Answer:
Physical Changes:
Let's say during your camping trip you stepped on a twig. This would be a physical change.
Let's also say that while there, you accidentally stepped on a flower, causing it to fall off of it's stem. This would also be a physical change.
Chemical Changes:
Let's say you start a fire using wood that you got from this rainforest. Since the act of burning something is a chemical change, this would apply.
Let's also say you forget a banana peel there. After a while, it would start to rot. And since rotting is a chemical change, this would apply as well.
Explanation:
Hope this helps!
24. Identify the following element:
1s22s22p63s23p64s23d8
A. nickel
B. copper
C. zinc
D. gallium
Which of the following statements is true regarding the Kinetic Molecular Theory?
Particles in a gas move in a straight line and do not lose kinetic energy when they collide with each other and the walls of their container.
Particles in a gas move in a straight line and lose kinetic energy when they collide with each other and the walls of their container. Particles in a gas move from side to side and contain no kinetic energy Particles in a gas move in a circular motion and contain no kinetic energy
Answer:
Particles in a gas move in a straight line and do not lose kinetic energy when they collide with each other and the walls of their container.
What percent of an original sample remains after 3 half-lives? After 5 half-lives?
Answer:
Three half lives corresponds to (12)3 . So a 18 quantity of the original isotope is retained. And the percentage of quantity of a radioactive material that remains after 5 half-lives will be . ∴NN0×100=10032=3.125.
Which models of the atom include a structure that is mostly made of empty space?
Select one or more:
a. Bohr
b. Rutherford
c. Quantum mechanical
d. Thomson
A substance has a mass of 12 grams and a volume of 6.0 cubic centimeters. What is the density of the substance?
Answer:
The answer is 2.0 g/cm³Explanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\[/tex]
From the question
mass = 12 g
volume of pencil = 6 cm³
We have
[tex]density = \frac{12}{6} \\ [/tex]
We have the final answer as
2.0 g/cm³Hope this helps you
Suppose you have the most abundant isotope of silver (Ag). How many neutrons would it have?
Answer:
61
Explanation:
Which analogy most accurately describes quantized energy levels?
a. A ramp.
b. Garden steps that get closer together the further they are from the ground.
c. The slope of a hill.
d. A ladder with evenly spaced rungs.
Answer:garden steps that get closer together the further they are from teh ground
Explanation:
Quantized energy levels are discrete and get closer together the further they are from the nucleus
Answer:
b
Explanation:
help cure the stupid by answering this also will give crown if right
Answer:
i think B
Explanation:
B b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b bb bb b b b b b b b b b b
The mass of a a typical car is 770 kg. What is the weight of that car on Earth?
The mass of a a typical car is 770 kg. What is the weight of that car on Earth?
a:770 N
b:4,312 N
c:7,546 N
d:4,312 kg
Answer: C.) 7,546 N
Explanation:
Given the following :
Mass of car (m) = 770 kg
Weight of car on earth = W
Weight = mass(m) × acceleration due to gravity(a)
Acceleration due gravity on earth = 9.8m/s²
Weight = 770kg × 9.8m/s²
Weight = 7546kgm/s² or 7,546 N
Compare and contrast Lamarck's and Darwin's theories of change over time.36a. What are the similarities? What are the differences?B. Why do scientists find Darwin's theory more convincing? 37 2. Explain why earthworms are beige or brown and not green3839a. Using Darwin's theory of natural selection.B. Using Lamarck's theory of change. 3. Explain whether Darwin's theory or Lamarck's theory is a better explanation for your results in the previous activity, "Hiding in the Background." Hint: Be sure to cite evidence from the activity.
Answer:
See explanation
Explanation:
Lanark proposed a theory of evolution hinged on use and disuse of body parts. This is a theory that upholds the transfer of acquired traits to offsprings. Darwin's theory of evolution was rather based on natural selection or 'survival of the fittest'. Darwin's theory has more evidence backing it compared to Lamarck's theory. The field of genetics which appeared long after Darwin's death confirmed that inherited traits are indeed passed from parents to offsprings. These inherited traits are usually those that give organisms an edge over others in their environment.
Earthworms are brown and not green or beige because, the brown earthworms have the same colour as the soil and are better enabled to escape from predators. From Darwin's theory, the brown earthworms are the 'fittest' hence they survive in their environment. Lamarck's theory may approach the matter from the point that earthworms move with their bodies on the soil more frequently, hence they 'acquired' the brown colour and passed it on to their offspring.
From the activity, "Hiding in the Background", individual worms spent their entire life cycle in either green or beige colour. Their colour didn't change as a result of the environment where they lived, rather the green earthworms were more in number, not particularly because of any specific changes the earthworms themselves had undergone, but because most of their predators concentrated on eating the beige worms. As a result of this, there were many green worms when the next generation began compared to the number of beige worms. Hence, there were more green earthworms.
Nora stirs one teaspoon, about 4.2 g, of sugar into her mug, which holds about 0.25 L of tea. What is the concentration of sugar in Nora’s tea?
Answer:
16.8 g/L.
Explanation:
Given that,
Mass of sugar, m = 4.2 g
Volume of tea, V = 0.25 L
We need to find the concentration of sugar in Nora's tea.
Here, 4.2 g is the mass of solute and 0.25 L is volume of the solution.
We know that,
[tex]\text{Mass concentration}=\dfrac{\text{Mass of solute}}{\text{Volume of solution}}\\\\C=\dfrac{4.2\ g}{0.25\ L}\\\\C=16.8\ g/L[/tex]
So, the concentration of sugar is 16.8 g/L.
Fill in the nuclear equation:
I don’t understand how to do it when there’s two elements on both sides.
Answer:
¹₀P
Explanation:
Nuclear reaction:
⁹₄Be + ⁴₂He → ¹²₆C + ?
To balance this equation, as with other combining specie, the mass number on both sides of the expression must be the same. Also, the atomic number must be the same.
Let us represent the unknown by X;
⁹₄Be + ⁴₂He → ¹²₆C + ᵇₐX
Now;
Sum of mass number;
9 + 4 = 12 + b
13 = 12 + b
b = 1
Sum of atomic number;
4 + 2 = 6 + a
a = 0
So the specie is a position ¹₀P
I’m not sure what the answer to this question is
If a liquid has a density of 0.785, then any object with _____ density will float.
More
Less
Can anyone Help me please? Im very confused.
Is the following nuclear equation balanced?
no
yes
4)
Chemical research that is directed toward a practical goal is called
Answer:
chemical knowledge
Explanation:
The pursuit of chemical knowledge for its own sake, no set goal Applied chemistry Research that is directed toward a practical goal or application, geared toward a specific goal
Answer: applied research
Explanation:
Aside from soap, what other agents can homogenize immiscible solutions? What is the difference between fats and oils? Why should one's consumption of fats and oils be limited or controlled? What can happen to a person whose fat consumption is not reduced? If you are a doctor with a patient whose health is deteriorating due to too much consumption of fats and oils, how will you help your patient minimiza his/her intake of oils and fats?
Answer:
Agents that can homogenize immiscible solutions are milk , lotion , glue , paint ,alcohol etc. The primary difference between fats and oils is that, whereas oils are generally derived from plants, fats are usually derived from animals. Eating too much of the wrong kinds of fats will increase unhealthy LDL cholesterol of decrease healthy HDL cholesterol, such as saturated and trans fats.Your risk of high blood pressure, arterial hardening (atherosclerosis), heart attack and stroke may be enhanced by the imbalance of fats and oils. Among the doctor and the patient , the patient's health is deteriorating.To minimize the intake of fats and oils by suggesting them simple ways-
Eat more vegetables and fruits. Stop cream and cheese sauces, or use low-fat milk and cheese to make meals. Instead of butter or margarine, try cooking with herbs , spices, lemon juice, etc. Try cooking with herbs, spices, lemon juice, etc., instead of butter or margarine.Beware of confectionary foods, such as chocolate or pastry dishes and crisps. These are very high in fat instead consider swapping for a more balanced snack or restricting portion sizes.
Explanation: FATS -: Fats are usually derived from animals. Fats contain a larger proportion of fatty acids that are saturated. Fats at room temperature are solid.
OILS - Oils at room temperature are liquid. From plants, oils are extracted. A greater proportion of unsaturated fatty acids are found in oils.
1. It is a combination of two or more substances in which each pure substance retains its
individual chemical properties.
A. Malter
B. Substance
C. Mixture
D Element
Answer:
It is a combination of two or more substances in which each pure substance retains its
individual chemical properties.
C. Mixture
PLEASE HELP
A) potetial energy to chemical
B) chemical energy to thermal
C) Thermal energy to kinetic
D) kinetic energy to potential
Answer:
most probably potential energy to chemical energy
describe what is the energy transferred from a battery powered motor
Answer:
The battery is a store of internal energy (shown as chemical energy). The energy is transferred through the wires to the lamp, which then transfers the energy to the surroundings as light. These are the useful energy transfers - we use electric lamps to light up our rooms.
Explanation:
Give me an example of oxide ore
example of oxide ore are hematite ,magnetite,chromite, zincite
Explanation:
Several species of oxide minerals are also quite useful for industrial purposes, and hold significant economic value. These include chief ores such as Hematite and Magnetite (Iron), Chromite (Chromium), Manganite (Manganese), Cassiterite (Tin), Ilmenite and Rutile (Titanium), Franklinite and Zincite (Zinc).
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A scientist thinks that monkeys can use calculators. To see if she was
right, she watched a group of monkeys for 30 days and kept track of any
calculations they made.
How was her investigation DIFFERENT from an experiment?
A. She did not make observations
B. She did not collect data
C. She did not have a hypothesis
D. She did not have a control group
Answer:C
Explanation:
How is the rock of the ocean floor formed?
It’s science not chemistry
Answer:
Rock is formed when the crust cracks, magma pushes up through the cracks, water cools it.
When sugar is added to a glass of water, it dissolves. How do you know this?
Answer:
Use a spoon, scoop up a small amount of the syrup. When you do, you won't be able to see any sugar crystals in the liquid which is water.
what is meant by ionisation energy
Answer:
Ionization energy is simple terms can be described as a measure of the difficulty in removing an electron from an atom or ion or the tendency of an atom or ion to surrender an electron.
Answer:
What is meant by ionization energy?
Ionization energy or ionization potential is the minimum amount of energy required to remove the most loosely bound electron of an isolated neutral gaseous atom or molecule. The amount of energy required to remove an electron from an isolated atom or molecule.
Example of ionization energy
1) Ionization energies measure the tendency of a neutral atom to resist the loss of electrons. It takes a considerable amount of energy, for example, to remove an electron from a neutral fluorine atom to form a positively charged ion.
2) Ionization: Changing Atoms Into Charged Ions
Some examples that you may be familiar with include: When sodium and chlorine combine to make salt, the sodium atom gives up an electron resulting in a positive charge while chlorine gets the electron and becomes negatively charged as a result.
