Answer: Mechanical weathering (also called physical weathering) breaks rock into smaller pieces.
Explanation: That means the rock has changed physically without changing its composition.
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Answer:
question pls.............
The first ionization energy, , of a sodium atom is 5.00×102 kJ/mol . What is the wavelength of light, in nanometers, that is just sufficient to ionize a sodium atom?
Answer:
2.40 × 10² nm.
Explanation:
We are given that the the first ionization of a sodium atom is 5.00 × 10² kJ/mol and we want to determine the wavelength of light (in nm) that is sufficient to ionize a sodium atom.
We will first find the ionization energy required for one sodium atom using molar conversions:
[tex]\displaystyle 1 \text{ atom Na} \cdot \frac{5.00 \times 10^2\text{ kJ}}{\text{mol Na}} \cdot \frac{1\text{ mol Na}}{6.02\times 10^{23} \text{ atom Na}} = 8.31 \times 10^{-22} \text{ kJ}[/tex]
From the formula:
[tex]\displaystyle E = hv[/tex]
Where h is Planck's constant, substitute and solve for frequency v:
[tex]\displaystyle \begin{aligned} \left(8.31 \times 10^{-22} \text{ kJ}\right) &= (6.626\times 10^{-34} \text{J$\cdot$s})\left(\frac{1 \text{ kJ}}{1000 \text{ J}}\right) v \\ \\ v & = 1.25\times 10^{15} \text{ s}^{-1}\end{aligned}[/tex]
From the relationship between frequency and wavelength, solve for wavelength:
[tex]\displaystyle \begin{aligned} c & = \lambda\nu \\ \\ \lambda & = \frac{c}{v} \\ \\ & = \frac{(3.00 \times 10^8 \text{ ms}^{-1})}{(1.25 \times 10^{15}\text{ s}^{-1})}\cdot \left( \frac{1\times 10^9\text{ nm}}{1 \text{ m}}\right)\\ \\ &=2.40\times 10^2 \text{ nm} \end{aligned}[/tex]
In conclusion, the wavelength of light necessary to ionize a sodium ion is about 2.40 × 10² nm.
The currents in our experiment are between 0 and 20 nanoAmperes. How many electrons per second are passing an ammeter if it reads 10 nA
The number of electrons per second passing an ammeter if it reads 10 nA is 6.24 × 10⁹ electrons per second
Since our current reads 10 nA and we require the number of electrons per second passing through the ammeter, 10 nA = 1 × 10⁻⁹ C/s.
Since there are 1.602 × 10⁻¹⁹ C/electron, the number of electrons per second, n = current/electron charge
= 1 × 10⁻⁹ C/s ÷ 1.602 × 10⁻¹⁹ C/electron
= 1/1.602 × 10¹⁰ electrons
= 0.62422 × 10¹⁰ electrons per second
= 6.2422 × 10⁹ electrons per second
≅ 6.24 × 10⁹ electrons per second
So, the number of electrons per second passing an ammeter if it reads 10 nA is 6.24 × 10⁹ electrons per second
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Write an equation between the carbonate and the acid
Answer:
In general an acid reacts with a carbonate or hydrogen-carbonate to produce a salt, carbon dioxide gas and water.
Based on the Lewis/electron dot representation
of the two atoms, predict the ratio of metal
cationic (+) atom to nonmetal anionic (-) atom in
the compound
•
Be•
••
•As•
•
A. 1:3
B. 2:1
C. 3:2
D. 1:1
Answer: I'm pretty sure the answer is 3:2
Explanation:
PLEASE ANSWER QUICK WILL GIVE BRAINLIETS
Answer:
W.
Explanation:
When something is solid, the particles move less. Also, they move less when they are colder.
Which particles are found in the nucleus of an argon atom?
A) protons and electrons
B) positrons and neutrons
C) protons and neutrons
D) positrons and electrons
Answer:
The answer is C
Explanation:
Protons and neutrons are found in the nucleus of an argon atom.
True or False. Photosynthesis and cellular respiration are OPPOSITE
chemical reactions
Answer:
Cellular respiration and photosynthesis are direct opposite reactions. Energy from the sun enters a plant and is converted into glucose during photosynthesis. Some of the energy is used to make ATP in the mitochondria during cellular respiration, and some is lost to the environment as heat.
how does the arragenment of the electrons change as you move down the colums
Answer:
The number of electron shells is therefore the same across a period but increases when moving down a column.
Explanation:
since matter can never be created nor destroyed where do the new substances come from?
Answer:
The Law of Conservation of Matter states that matter can never be created nor destroyed, only conserved. New substances form when bonds break and new bonds form. The chemical properties of the new substances are different from those of the original substances.
atoms of the same element may contain:
Answer:
I think the answer is the same number of protons.
Explanation:
I think the same element contain same number of protons.
Help me out please!
Using Oxygen-16 as an example (identify the number of protons, neutrons, and electrons if):
a. Describe what would happen to the atom if a proton were added.
b. Describe what would happen to the atom if a neutron were removed.
c. Describe what would happen to the atom if two electrons were added.
Answer:
B. po
Explanation:
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After incubation of a set of O/F glucose tubes, the tube without mineral oil turned yellow, while the tube with mineral oil remained green. What does this indicate?
It might indicate NO fermentation and oxidation of glucose occurred. An oxidative organism breaks down glucose in presence of Oxygen, while a nonoxidative organism can break down glucose in absence of oxygen.
An Oxidation-Fermentation (OF)-glucose test is a microbiological test to determine how an organism is able to break down glucose.
In the first tube, a layer of mineral oil is added in order to reproduce anaerobic conditions, whereas this layer is not added to the second tube in order to reproduce aerobic conditions.
When the non-oil tube turns yellow, while the oil tube remains green, it means that the microorganism is oxidative (i.e., the microorganism only can metabolize glucose in presence of oxygen).
If both tubes remain green, it means that the test is negative and no fermentation/oxidation of glucose occurred.
If both tubes turn yellow, then the microorganism is oxidative and fermentative.
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Define kinetic energy and thermal energy
Answer:
Kinetic energy is the energy by ethicalness of article's movement while Thermal energy is the inner energy of an item because of the motor energy of its particles.
Explanation:
Answer:
Thermal energy:
Thermal energy is a type of energy that is formed by the vibration of atoms and molecules inside matter. The faster they vibrate, the more energy they contain. They also gain more heat.
Kinetic energy:
Kinetic energy is the mass/energy that is in moving objects. When an object speeds up, it gains more kinetic energy. All moving objects contain kinetic energy. The moving object gains energy due to its motion.
Note:
Sorry if this is a bad explanation but hopefully this helped!
PLEASE HELP ME!!
1)which pattern of inheritance controls the grow of beard in male humans?
2) A basketball player in the Philippine basketball association stands tall at 7'0. Which pattern of inheritance determines the expression of the height of an individual?
which gas makes up more than 75% of the atmosphere?
A. Nitrogen
b. Water Vapor
c. argon
d. carbon dioxide
Answer:
its A
Explanation:
cause Earth's relatively thin atmosphere primarily consists of a mixture of nitrogen (75%) and oxygen (21%) gases.
Answer:
The answer to your question is A
Explanation:
Because Earth's relatively thin atmosphere primarily consists of a mixture of nitrogen (75%) and oxygen (21%) gases.
ANY rock can become a new sedimentary rock when ________
A. sediments are compacted and compressed under pressure.
B. sediments are melted then cooled.
C. magma is compacted and compressed with pressure.
D. magma is melted and cooled.
Answer:
sediments are compacted and compressed under pressure
Many plants that grow in shady areas have large leaves. This feature helps the plants gather more sunlight for photosynthesis. Which statement describes an example of evolution?
A. All plants pass the genes for large leaves to their offspring.
B. Plants with leaves of varying size sprout in gardens each year.
C. All plants have variation in their genes for leaf size.
D. Plants with large leaves have become common in rain forests.
Answer: D.Plants with large leaves have become common in rain forest
Explanation: I got this right on the test trust me
Answer:
D. Plants with large leaves have become common in rain forests
Explanation:
I got it correct. Be careful that sometimes the questions are in another order, so be guided by the sentence.
Explain how the strongest type of intermolecular force in liquid HF arises
Answer:
The fairly positive hydrogen on one HF molecule will be attracted to one of these lone pairs on a nearby HF molecule. This is a hydrogen bond. Hydrogen bonds are attractions between a δ+ hydrogen on one molecule and a lone pair on a very electronegative atom (N, O or F) on another molecule.
Explanation:
what’s the chemical formula for zinc (lll) sulfide?
Answer:
ZnS
Explanation:
Answer:
the chemical formula for zinc iii is ZnS
Hydrogen bond is a strong dipole interaction between water and another molecule true or false want an ans
Answer:
it is true
Explanation:
that's the right answer
Answer: True. Hydrogen bonding is a dipole-dipole interaction and it is between water and another molecule.
why is gold not magnetic
Gold (Au) in its bulk form, like the metal in a wedding ring, is not considered a magnetic material. ... This means that metallic gold has no unpaired electrons, and it does not display classical magnetism. Gold was one of the first metal known to man. Gold is most malleable and ductile of all metals.
What class of enzyme catalyzes addition of oxygen?
Answer:
The answer is Lyase
Explanation:
Any enzyme that catalyzes the addition or removal of the elements water (hydrogen, oxygen), ammonia (nitrogen, hydrogen), or carbon dioxide (carbon, oxygen) at double bonds, as defined in physiology. Decarboxylases, for example, remove carbon dioxide from amino acids, while dehydrases eliminate water.
Match the part of the wave to the diagram
Group of answer choices
Q4
Q5
Q6
Q7
Answer:
The first high part is Q4, then the low part is Q7, the following high part is Q6, and the energy moving from the next two high points is Q5.
Explanation:
The first high part is Q4, then the low part is Q7, the following high part is Q6, and the energy moving from the next two high points is Q5 because of the diagram.
ANSWER QUICK!! IM GIVING 100 POINTS + BRAINLIEST FOR THE FIRST RIGHT ANSWER :)
Which are characteristics of the periodic table? (Choose all that apply.)
The elements that have been discovered so far can be found here.
It is arranged by the atomic number (number of protons).
The compounds that can be created are listed here.
It is arranged by all of the subatomic particles.
Answer:
A. The elements that have been discovered so far can be found here.
B. It is arranged by the atomic number (number of protons).
Explanation:
About the Answers:
All the elements that have been discovered are on the periodic table. Scientist know that there are still unknown elements and actually predict what they'll be like and what their properties are. The periodic table is arranged by the increasing number of atomic numbers. The atomic number is main identification of elements and is the amount of protons each element has.
About the Wrong Answers:
All the compounds that can be created are not found on the periodic table. In fact, there more than nine million organic compounds. The periodic table is not arranged by all of the subatomic particles. While the atomic mass and electron configuration is included, it is not arranged by it.
11
Directions: Select each correct answer. More than one answer may be correct.
Which of the following affects the force of gravity between two objects?
the objects' densities
the distance between the objects
the objects volumes
圖
the objects masses
Reset
Submit
Answer:
The objects masses and the distance between the object.
An electron which has quantum numbers _______________ is degenerate with an electron with quantum numbers n = 3, l =2, ml =1, ms = - 1⁄2.
Can a molecule that has absorbed infrared radiation subsequently emit a photon with a wavelength in the uv region as a result?
yes
no
molecules cannot absorb infrared.
It is not possible that a molecule that has absorbed infrared radiation subsequently emit a photon with a wavelength in the UV region as a result.
Both infrared rays and ultraviolet rays belong to the electromagnetic spectrum. However, the infrared rays are lower in energy than the ultraviolet rays. Hence, infrared rays have a longer wavelength than ultraviolet rays.
This implies that it is not possible that a molecule that has absorbed infrared radiation subsequently emit a photon with a wavelength in the UV region as a result.
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Phương trình hóa học là gì
Explanation:
sự xuất bản hóa học nào? có một câu hỏi về khoa học mà bạn cần giúp đỡ? tôi luôn ở đây để giúp đỡ!
What is the wavelength of green light (in nm) with a frequency of 5.98 x 1014 s-1?
A) 5.02 x 10-7 nm
B) 1.99 x 10-6 nm
C) 502 nm
D) 545 nm
E) 5.45 x 10-7 nm
Answer:
502nm
Explanation:
wavelength=3×10^7/5.98×19^14
