Explanation:
a. CGS system: centimetre as the unit of length, the gram as the unit of mass, and the second as the unit of time
b. SI system: metre as the unit of length, the kilogram as the unit of mass, and the second as the unit of time
Can you think of something you do or a hobby you have that is physics
related? Explain your thinking as to how what you do is Physics related.
You can take physics as a hobby and also it is great that you like both maths and physics as well and also want to be an computer science engineer because physics and math
What is the mass of sulfuric acid, H2SO4, that is contained in 2.0 L of a 5.85 M solution ?
A-1147.44 grams
B- 0.12 grams
C-11.7 grams
D-98.07 grams
2 questions. will give brainliest if i can figure out how
What happens to the electrons of a reducing agent during a reaction?
a.Electrons are gained
b.Electrons are lost
c.Electrons are held
d.Electrons are doubled
When is a substance reduced during an oxidation reduction reaction?
a.After one substance is oxidized
b.Before one substance is oxidized
c.Same time as one substance is being oxidized
d.Only oxidation occurs
1= b. electrons are lost
2= a. after one substance is oxidized
Groups of atoms repeat to make up a substance?
True
False
Answer:
ITS TRUE!!!!!
7. Which of the following physical changes is experienced by women during the luteal stage of the
menstrual cycle?
a. Mood swings b. Changes in appetite c. Depression or sadness d. Headaches or
backaches
Answer:
The correct answer is Choice D.
(Headaches or backaches)
Explanation:
Hope this helps!
Please mark me as Brainlinieast.
How are the sun and Earth's moon different? (2 points)
a
The sun is a ball of gases that revolves around Earth, while the moon is the center of the solar system.
b
The sun is a ball of rock and gas, while the moon is a ball of rock that revolves around the sun.
c
The sun is the center of the solar system, while the moon is a ball of rock that revolves around Earth.
d
The moon is the center of the solar system, while the sun is the center of the Milky Way.
What is the number of particles after gluecose is mixed with water
Answer: dissolves
Explanation:
When you stir a spoonful of sugar into a glass of water, you are forming a solution. This type of liquid solution is composed of a solid solute, which is the sugar, and a liquid solvent, which is the water. As the sugar molecules spread evenly throughout the water, the sugar dissolves.
How many moles are in 1.3 x1023 atoms of He?
Answer:
he ans she and he and she but she was he so how was he
Explanation:
92.12 kJ of heat is required to convert 58.40 g of gold from liquid to gas phase. What is the heat of vaporization of gold in J/g?
Answer:
The heat of vaporization of the gold sample is 1577.397 joules per gram.
Explanation:
The latent heat of vaporization of gold ([tex]h_{v}[/tex]), in kilojoules per gram, is the heat required by a unit mass of gold to transform the material from liquid to gas:
[tex]h_{v} = \frac{E}{m}[/tex] (1)
Where:
[tex]E[/tex] - Energy required for vaporization, in joules.
[tex]m[/tex] - Mass, in grams.
If we know that [tex]E = 92120\,J[/tex] and [tex]m = 58.40\,g[/tex], then the heat of vaporization of the gold sample is:
[tex]h_{v} = \frac{E}{m}[/tex]
[tex]h_{v} = 1577.397\,\frac{J}{g}[/tex]
The heat of vaporization of the gold sample is 1577.397 joules per gram.
1. In nature, most organisms produce through sexual reproduction. However, there are some that undergo (4)_____. Plants like strawberries and potatoes grow without seeds and spores, instead of using (5)____. In (6)______, you have a single-celled organism that copies the information inside of itself and divides into two identical organisms. Through (7)______, new organisms like yeast grow on parent organisms and split off once they're mature enough to survive independently. This isn't to be confused with (8)_____, which involves organisms splitting apart and growing independently of one another.
Word Bank for #4-8:
• budding
• binary fission
• vegetative propagation
• asexual reproduction
• fragmentation
Answer:
(4) asexual reproduction (5) vegetative propagation (6) binary fission (7) budding (8) fragmentation
The correct words to fill the given blanks would be as follows:
4). A-s-e-x-u-a-l reproduction.
5). Vegetative propagation.
6) Binary fission
7). Budding
8) Fragmentation
Reproduction
Reproduction is denoted as the process by which living organisms generate their younger beings.
Some organisms generate through s-e-x-u-a-l mediums while others generate through the A-s-e-x-u-a-l process.
The a-s-e-x-u-a-l methods of reproduction include:
BuddingFragmentationBinary FissionVegetative Propagation.Spore FormationLearn more about "Organisms" here:
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how can we find out the mass of the marble
In a collection of marbles, 25% of the marbles have a mass of 5.00 g and 75% of the marbles have a mass of 7.00 g. The average mass of a marble is 6.50 g.
Name the compound and determine the number of moles present. SHOW YOUR WORK.
17.4 g Na
17.4 grams of Sodium
Na= 1 mole.
Suppose you have 1000 lb of waste copper (II) oxide sitting in the basement of your factory. Do you see a problem with sending it to a landfill?
Answer:
Yes.
Explanation:
Yes, we have a problem with sending it to a landfill of copper oxide because it has harmful effect on the health of humans as well as more weight of the copper oxide. Copper oxide usually found in powder form which can easily be inhaled that causes death of the cell due to toxic effect on the mitochondria and lysosomes of the cell. It makes problem of health in carrying the copper oxide from the basement of the factory to the landfill region due to its power form so we can say that it can do problems to human health while carrying from one place to another.
Choose all the nucleophiles.
Choose one or more:
CH3SNa
NaNH2
H3O+
CH3OH
CH3CH2CH3
NH4+
OH-
(CH3)3CLi
Answer:
CH3CH2CH3
(CH3)3CLi
CH3SNa
Explanation:
A weak base. B. has a K. of 4.46 x 10-10 A solution with an unknown initial concentration is tested, and found to have a pH of 8.39. Determine the initial concentration of B.
Answer:
0.013MB
Explanation:
There is a series of nitrogen oxides with the general formula N?O?. What is the empirical formula of one that contains 63.66% nitrogen?
Answer:
N₂O
Explanation:
Empirical formula is defined as the simplest whole number ratio of atoms presents in a molecule
For a nitrogen oxide that contains 63.66% of nitrogen, the percent of oxygen must be:
100-63.66 = 36.34% Oxygen
This percent is the percent in mass. To solve this question we must convert the mass of each atom to moles in order to find the simplest whole number ratio:
Moles of the atoms:
N = 63.66g * (1mol / 14g) = 4.547 moles N
O = 36.34g * (1mol / 16g) = 2.271 moles O
The ratio N:O is:
4.547 moles N / 2.271 moles O = 2
That means there are 2 atoms of N per atom of O and the empirical formula is:
N₂OLymph nodes are...
A. bean shaped.
B. circular.
C. carrot shaped.
D. asparagus shaped.
Answer:
a
Explanation:
Why does the offspring have identical inherited traits as the parent?
If a nuclear reactor were to have a meltdown, radioactive materials could escape in the form of gases from the reactor into the atmosphere and harm humans and the environment. One safety system that might be able to prevent such an escape is a:
A containment building.
hope this helpedddd
Iron is denser than helium.
True or false
Explanation:
Elements heavier than Helium are synthesized in a number of environments. For elements that are lighter than Iron, those elements are synthesized during various phases in the evolution of massive stars. For elements heavier than Iron, one needs quite a bit of energy input to form these heavy elements.
However, in day-to-day experience, the strangeness of Einstein's ideas doesn't help us, and Newton's notions do just fine. In everyday Life, when gravity isn't especially intense, Newton's and Einstein's ways of thinking lead to similar results. The two explanations work like different languages that express the same thing.
—A Black Hole Is NOT a Hole, Carolyn Cinami DeCristofano
Why is it important to learn about Newton's view of gravity? *
It is similar to Einstein's theory.
It is important to know other languages.
It works in most daily situations.
It explains how a black hole works.
Answer:
It works in most daily situations.
Explanation:
:)
Answer:
C. It works in most daily situations.
Explanation:
Edge-nuity 2022
What experimental evidence led Rutherford to conclude the following: (a) The nucleus of the atom contains most of the atomic mass. The nucleus of the atom contains most of the mass since only a collision with a very dense, massive object would cause an alpha particle to be the source. (b) The nucleus of the atom is positively charged. The positive alpha particles their initial flight indicating that the nucleus of the atom is also positively charged. (c) The atom consists of mostly empty space. Most alpha particles pass through the gold foil leading to the conclusion that the atom is mostly empty space.
Answer:
See Explanation
Explanation:
The experiment of Ernest Rutherford involved the bombardment of a thin gold foil with alpha particles from a radioactive source. A zinc sulphide screen was used to follow the movement of the alpha particles.
It was discovered that most of the alpha particles followed a straight path through the gold foil. Some of them were scattered through large angles and few were even scattered in the backward direction.
Since alpha particles were heavier than electrons, they must have been deflected by very strong forces.
These experimental evidences led to the conclusions stated in the question.
What would be the most effective way for a scientist to get an idea of the actual age of a rock?
Answer:
Radiometric dating
Explanation:
Radiometric dating would be the most effective way since it is a technique that can establish the age of objects older than a few thousand years.
When a 0.3546 g of vanadium metal is heated in air, it reacts with oxygen to achieve a
final mass of 0.6330 g. Calculate the empirical formula of this vanadium oxide
Answer:
V2O5 is the empirical formula of vanadium oxide
Explanation:
The molecular mass of Vanadium is 50.949 g/mol
Number of moles of vanadium = 0.3456 g/50.949 g/mol = 0.00696 moles
The molecular mass of Oxygen is 16.0 g/mol
Number of moles of Oxygen = (0.6330 – 0.354) g/16 g/mol = 0.0174 moles
Emperical formula
V (0.00696 moles/0.00696 moles) O (0.0174 moles /0.00696 moles)
V 1 O2.5
Multiply by two get a whole number
V2 O5
balance
A FeS2 + B O2 → C Fe2O3 + D SO2 *
Answer:
4FeS2 + 6O2 > 2Fe2O3 + 8SO2
Explanation:
Sven perform this reaction with 15.0 grams of sodium sulfate and an excess of iron (III) phosphate to make iron (III) sulfate and sodium phosphate. In the actual experiment, 10.0 grams of sodium phosphate are experimentally made, what is the percent yield?
2FePO4+3Na2SO4-->Fe2(SO4)3+2Na3PO4
Answer:
85.5%
Explanation:
To get the experimental value, you need to convert 15.0 grams of Na2SO4 to grams of Na3PO4. You do this with stoichiometry.
Convert grams of Na2SO4 to moles with molar mass. Then convert to moles of Na3PO4 with the mole-to-mole ratio according to the balanced chemical equation. Then convert moles of Na3PO4 to grams with the molar mass.
15.0 g Na2SO4 x (1 mol/142.04 g) x (2 Na3PO4/3Na2SO4) x (163.94 g/1 mol) = 11.7 g Na3PO4
Percent Yield = (actual value/experimental value) x 100
Actual Value = 10.0 g
Experimental Value = 11.7 g
10.0g/11.7 g = 85.5%
HELP MEE PLEASEEEEE
Answer to question #1.
Answer to question #2.
Answer:
1. A
2. B
Explanation:
What is the oxidation state of copper in Cu(C2H3O2)2? +2 -1 -2 +4 +1
Answer:
6........................
how do hydrogen fuel cells and fossil fuels produce energy?
Answer:
The hydrogen reacts with oxygen across an electrochemical cell
Explanation:
What do the quantum numbers of electrons represent?
A. The total number of protons and electrons in the atom
B. The number of valence electrons the atom has
O C. The oxidation states most common to the atom
D. The energy levels and orbitals the electrons are in
Answer:
the energy levels and orbitals the electrons are in
Explanation:
i just took the test :)
The energy levels and orbitals the electrons are in. Hence, option D is correct.
What are atoms?An atom contains a central nucleus surrounded by one or more electrons.
The quantum numbers of electrons represent the probable distance of the electron from the nucleus. It refers to the size of the orbital and the energy level an electron is placed in.
Hence, option D is correct.
Learn more about atoms here:
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