Answer:
The absorbed energy will change the electron's position. We can never know both the momentum and position of an electron in an atom.
Explanation:
Sieving is a technique used to separate mixtures containing solid particles of
(a) small sizes
(b) large sizes
(c) the same sizes
(d) different sizes
it can be be be be be ebe be e e
How many electrons can fit in the sixth energy level
Answer:
72 electrons
Explanation:
The 6th shell could hold up to 2(6)² = 2(36) = 72 electrons
Which of the following best describes the relationship between the speed of sound and the type of medium?
A.
Sound travels slower in air because of the large distance between air particles
B.
Sound travels slower in solids because of the small distance between solid particles
C.
Sound travels slower in air because of the small distance between air particles
D.
Sound travels slower in solids because of the large distance between solid particles
Answer:
A. Sound travels slower in air because of the large distance between air particles
Explanation:
Sound is a mechanical wave that requires a medium for its propagation. Without a medium, sound cannot go through easily or readily. This implies that sound cannot be propagated through a vacuum.
A vacuum is an empty space without any particles in side. Sound waves travel fastest the most in solids because the particles are dense and close to one another. The speed of sound in air is the least because of the large distance between air particles. Therefore, the speed of sound is medium dependentIs a tooth made out of matter or not matter?
Human teeth are made up of four different types of tissues.
A bottle of hydrogen peroxide that eventually turns into a bottle of water and oxygen gas is an example of a
What effects do winds patterns have on climate
Prevailing winds bring air from one type of climate to another. For example, warm winds that travel over water tend to collect moisture as they travel; the water vapor in the air will condense as it moves into colder climates, which is why temperate coastal areas often receive heavy rainfall.
Hope it Helps! T^T
_FeBr3 +_H2SO4 --->_Fe2(SO4)3 +_HBr
Answer:
2FeBr₃ + 3H₂SO₄ ⇒ Fe₂(SO₄)₃ + 6HBr
Explanation:
match the products and reactants of both sides.
GIVING BRAINLIEST!
Please define the following in your own words:
law of conservation of matter
Answer:
No new matter can be created, and no matter can be destroyed. Matter can only change in state or chemical composition. The amount of mass before the change will equal the amount after the change.
Explanation:
Diamonds are formed when carbon is placed under extreme heat and pressure. This process
in caves
in the ocean
In the atmosphere of Earth
beneath the surface of Earth,
Answer:
beneath the surface of Earth
Explanation:
Diamonds are made up of carbon that has been placed under extreme heat and pressure conditions.
These conditions of high pressure and temperature can only be found within the subsurface. As you go deeper to the mantle, the geothermal gradient rises significantly.
Also, the overburden pressure will also be high.
These processes can also occur on other planets and some can be associated to the earth times when the earth was being formed.
The condition at which diamond forms confers some of the distinct natural properties that typifies it.
The atomic number of Arsenic (As) is 33 and the average atomic mass is 74.92 amu. A neutral arsenic atom will have protons
Given :
The atomic number of Arsenic (As) is 33.
The average atomic mass is 74.92 amu.
To Find :
A neutral arsenic atom will have protons.
Solution :
We know, atomic mass is the sum of number of protons and neutrons.
Also, atomic number is the number of protons present in an atom.
Therefore, a neutral arsenic atom will have 33 protons.
Sodium chloride (NaCl) is formed in a chemical reaction between sodium (Na) and chlorine (Cl2).
What is sodium chloride?
14.
A.
an element
B.
a mixture
C.
a compound
D.
an atom
Lithium
Which statement about lithium describes what makes lithium very reactive?
F.
The number of neutrons in the nucleus.
G
The number of electrons in the first energy level.
H.
The number of protons in the nucleus.
J.
The number of electrons in the last energy level.
Answer:f
Explanation:
When a chemical change occurs:
A) the law of conservation of mass is always obeyed
B) the chemical properties of new substances are different from the ones you started with
C) all of the options are true
D) atoms are rearranged
Answer:
Are composed together
Explanation:
What is the energy of a photon that emits a light of frequency 7.21 x 1014 Hz? A. 4.78 x 10-19 J B. 2.76 x 10-19 C. 1.0910-19 J D. 4.16 x 10-19 J
Answer:
E = 4.78×10^−19 J
Explanation:
The chemical equation for the energy of a photon is given by:
E =hν , where h is the Planck constant and ν is the frequency.
E =hν = 6.626×10^−34 Js × 7.21×10^ 14
s−1 = 4.78 × 10^−19 J
Answer:
A. 4.78 x 10-19 J
Explanation:
A P E X
Helpppppppppppppppppppppp
balancing skeleton equation can someone help me with this
When any chemical equation is not balanced then that is known as skeletal chemical equation. We need to balance it because as we know that mass can neither be created nor be distroyed and also the number of atoms on the reactant side should always be equal to the compounds on the product side .
I NEED HELP RN 40 POINTS
Answer:
B.) Adding a source of carbon dioxide to the water.
Explanation:
I had that question too.
how many moles of oxygen molecules can be produced from 6 moles of lead oxide
Answer:
Moles of oxygen molecules produced = 3 mol
Explanation:
Given data:
Moles of oxygen molecules produced = ?
Number of moles of lead oxide decomposed = 6 mol
Solution:
Chemical equation:
2PbO₂ → 2PbO + O₂
Now we will compare the moles of oxygen and lead oxide.
PbO₂ : O₂
2 : 1
6 : 1/2×6 =3 mol
three moles of oxygen molecules are produced.
What can we do with even more scientific knowledge?
Explanation:
Scientific knowledge allows us to develop new technologies, solve practical problems, and make informed decisions, both individually and collectively.
Answer:
If we had more scientific knowledge, we would be able to increase the productivity of life-saving equipment that provides a longer life for us
be able to make more sensible and informed decisions
make more achievements in studies and be more accurate etc..
Hope this helps<3
Please help
As the temperature increases, the molecular motion of the molecules decreases and it
becomes difficult to overcome the polar attractions.
a. TRUE
b. FALSE
The solids and liquids with the strongest intermolecular forces of attraction will have the
lowest melting and boiling points.
a. TRUE
b. FALSE
*BRAINLIEST BRAINLIEST
Which wavelength would have the highest energy?
670 nanometers
1.3x10^-10 meters
5.3x10^-8 meters
1.5x10^-3 meters
Answer:
THE 3 third one
Explanation:
Under which conditions does a real gas behave most like an ideal gas? A. At low temperatures and high pressures B. At low temperatures and low pressures C. At high temperatures and high pressures D. At high temperatures and low pressures
Answer: D. At high temperatures and low pressures
Explanation:
At low temperature and high pressure, the kinetic energy of gas molecules is negligible and molecules will have negligible forces of attraction. So real gases will behave least like an ideal gas under such conditions.
At high temperature and low pressure, energy due to intermolecular forces becomes less important in comparison to the kinetic energy of particles. The size of molecules also become less significant than the empty space between the gas molecules. So real gases behave in a similar manner to ideal gases at high temperature and low pressure.
Which of the diagrams below shows an atom that is not a form of hydrogen?
Answer:
I believe is the npp i kinda forgot how to do these lol
Diagram with npp type shows an atom that is not a form of hydrogen.
What is an atom?
An atom is defined as the smallest unit of matter which forms an element. Every form of matter whether solid,liquid , gas consists of atoms . Each atom has a nucleus which is composed of protons and neutrons and shells in which the electrons revolve.
The protons are positively charged and neutrons are neutral and hence the nucleus is positively charged. The electrons which revolve around the nucleus are negatively charged and hence the atom as a whole is neutral and stable due to presence of oppositely charged particles.
Atoms of the same element are similar as they have number of sub- atomic particles which on combination do not alter the chemical properties of the substances.
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How we can preserve the wetlands areas of nepal?
Answer:
Reduce, reuse, and recycle your waste and trash. Protecting the environment helps protect the wetlands, especially since trash can make its way into the water. The best and easiest way to protect the environment is by limiting your household waste.
What is the density of a block with a volume of 5 cm3 and a mass of 20 g?
Answer: 4g/cm^3 or 4000g/L (4kg/L)
Explanation:
I'm not sure what units the question intended so I put both. For the first one, the equation for density is mass/volume so I divided the 20g by 5cm^3 to get 4g/cm^3. Just in case those aren't the intended units for volume and is instead liters, one cm^3 equals one ml. In addition, there are 1000ml in every liter so you can determine the amount per liter by multiplying 4g/ml by 1000 to get 4000g/L or 4kg/L.
I hope this helps.
HELP ASAP EILL MAKE BRAINLEST Students are conducting a la estimating the time takes for the cell cycle in normal chocols They find that the average time for one complete el cycle is 22 hours What arence would they expect to see nerous chien
Cancerous chicken cels will spend more time in the phase
Cancerous cells will not complete all phases of the cell cyce
Cancerus chin cells will complete moss in a shorter amount of time
O Cancerous chicken cols and normales will have the same total amount of time to complete the cell cycle
Answer: I don't know if this helps but here's some information I think might help.
Usually, cells will take between 5 and 6 hours to complete S phase. G2 is shorter, lasting only 3 to 4 hours in most cells. In sum, then, interphase generally takes between 18 and 20 hours. Mitosis, during which the cell makes preparations for and completes cell division only takes about 2 hours. Calculate the percentage of time spent in each phase by counting the total number of cells in each phase (total in interphase, in prophase, etc.) and dividing each by the total number of cells you counted. How do cancer cells differ in total time required for mitosis? Cancer cells produce 117 minutes faster than regular cells. ... Normal cells require 640 minutes during interphase, cancer cells only need 380. For prophase, cancerous cells need 15 minutes less than regular cells. Another hallmark of cancer cells is their "replicative immortality," a fancy term for the fact that they can divide many more times than a normal cell of the body. In general, human cells can go through only about 40-60 rounds of division before they lose the capacity to divide, "grow old," and eventually die 3.
One gram of salt in swimming pool of water could be considered a _____ solution.
Answer:
Soluable
Explanation:
Because salt dissolves in water.. Your question has no background information to go off of
Answer:
dilute
Explanation:
trustt
How many grams of carbon are in 300 g of glucose
According to collision and transition state theories, what is the importance of activation energy?
According to the collision theory, the following criteria must be met in order for a chemical reaction to occur: Molecules must collide with sufficient energy, known as the activation energy, so that chemical bonds can break.
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Collision theory expresses that substance responses (in the gas stage) happen because of crashes between reactants.
Importance of activation energy:To really start a reaction, impacts should be adequately lively (dynamic energy) to break compound bonds; this energy is known as the Activation energy. As the temperature rises, atoms move quicker and impact all the more energetically, significantly improving the probability of bond breakage upon crash.
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