Answer:
0.152 molExplanation:
To find the number of moles in a substance given it's number of entities we use the formula
[tex]n = \frac{N}{L} \\[/tex]
where n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
From the question we have
[tex]n = \frac{9.15 \times {10}^{22} }{6.02 \times {10}^{23} } \\ = 0.151993...[/tex]
We have the final answer as
0.152 molesHope this helps you
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Which of these is true about energy?
Can be destroyed
Cannot be created
Cannot be transformed
Can be increased in a closed system
Answer:
3number please write okay
Explanation: ok what kinda of math it is
What part of a plant is most likely to show negative phototropism
Answer:
Different organs of the plant may exhibit different phototropic reactions to different wavelengths of light. Stem tips exhibit positive phototropic reactions to blue light, while root tips exhibit negative phototropic reactions to blue light. Both root tips and most stem tips exhibit positive phototropism to red light.
Explanation:
PLS PLS PLS HELP ME I WILL MARK YOU BRAINLYEST JUST PLS :((
Answer:
cytoplasm.....................
rationalize the following statements and give chemical reactions .
(1) Lead (II) chloride reacts with chlorine to give pbcl4.
(2) Lead is known not to form an iodide,pbl4 .
Answer:
i do not no
Explanation:
sorry i do not known
The type of chemical bond resulting from a complete electron transfer is:
metallic
covalent
radical
ionic
Answer:
ionic / electrovalent bonds
Explanation:
Answer:
4. Ionic
Explanation:
What kind of engine does a hybrid car use?
A. gasoline and solar
B. gasoline
C. gasoline and electric
D. electric and solar
Answer:
D. Electric and solar
Answer:
Gasoline and Electric
Explanation:
Quite simply, a hybrid combines at least one electric motor with a gasoline engine to move the car, and its system recaptures energy via regenerative braking. Sometimes the electric motor does all the work, sometimes it's the gas engine, and sometimes they work together.
Which is one of the reactants in Reaction A?
Group of answer choices
copper
water
silver
sodium
Answer:
Water is one of the reactants
What is the main characteristic of altruistic love? A. admiration B. unconditional love C. passion D. tenderness
Answer:
B. unconditional love
Explanation:
Answer:
B unconditional love
Explanation:
Which of the following would be produced in a combustion reaction?
A. Hydrogen
B. Oxygen
C. Carbon dioxide
D. A hydrocarbon
How many molecules are equal to 3.52 moles of oxygen difluoride?
Answer:
3.52 moles are equal to 21.2 ×10²³ molecules
Explanation:
Given data:
Number of moles of oxygen fluoride = 3.52 mol
Number of molecules = ?
Solution:
The given problem will solve by using Avogadro number.
1 mole contain 6.022×10²³ molecules
3.52 mol ×6.022×10²³ molecules / 1 mol
21.2 ×10²³ molecules
Thus, 3.52 moles are equal to 21.2 ×10²³ molecules .
2. What is true about the position of all metals in
the periodic table?
A. They are in the first group.
B. They are in the bottom period.
C. They are in the rightmost column.
D. They are to the left of the zigzag line.
Answer: D they are to the left of the zigzag line.
Explanation:
The first group are alkali metals and therefore wrong. The zigzag line is composed of semimetals and to the left we have metals like magnisum and metals are always bottom right in the table.
explain what a convection current is?
who ever sees this I hope you have a wonderful day!
Answer:
Convection currents are flowing fluid that is moving because there is a temperature or density difference within the material.
Because particles within a solid are fixed in place, convection currents are seen only in gases and liquids. A temperature difference leads to an energy transfer from an area of higher energy to one of lower energy.
The chemical process in which small organic molecules called monomers bond together to form a chain is called A) production B) polymerization C technology D) modification
draw the ring chain of isomer of propene ?
Explanation:
Molecular formula for Propene = C3H6
The isomer of propene is cyclopropane.
(Draw a triangle to show that it is cyclopropane)
A 4 Lbs. Aluminum foil warp costs $33.11 dollars. What is the cost of
one atom of aluminum?
\Which layer is between the crust and the asthenosphere?
Answer:
Lithosphere
Explanation:
Answer:
Lithosphere
Explanation:
The Lithosphere is the outermost layer of the Earth of about 100km thick and it is a rigid layer that includes the brittle upper portion of the mantle and the crust. Lithosphere is the hard outer region which includes all of the crust and the uppermost mantle.
In which interaction is the prey harmed?
Commensalism
Competition
Mutualism
Predation
Answer:
predation.
Explanation:
predation. means the preying of one animal on others
Answer:
Predation
Explanation:
Because one organism eats another. The PREDATOR benefits, the PREY is harmed.
Hope it helps!
Henry sees a basketball and decides to put in motion. What kind of force does Henry
use to move the ball?
Answer:
Unbalanced Energy
Explanation:
:p
How does a ligand bind to the proper receptor?
Answer:
The ligand crosses the plasma membrane and binds to the receptor in the cytoplasm.
Answer:
The receptor then moves to the nucleus, where it binds DNA to regulate transcription.
Which of these is a distinguishing abiotic feature of the Great Barrier Reef, the
world's largest coral reef?
A. Warm, shallow water
B. Blue skies
O C. Freshwater
O D. Colorful corals
Answer: warm shallow water
Explanation: I’m doing the course on Ape and that was correct
what is the definition of phosphates
Explanation:
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Help me for brainlest and 100 point
Answer: Stamen, the male reproductive part of a flower. In all but a few extant angiosperms, the stamen consists of a long slender stalk, the filament, with a two-lobed anther at the tip. The anther consists of four saclike structures (microsporangia) that produce pollen for pollination. The main flower parts are the male part called the stamen and the female part called the pistil. The stamen has two parts: anthers and filaments. The anthers carry the pollen. The four main parts of a flower are the petals, sepals, stamen, and carpel (sometimes known as a pistil). If a flower has all four of these key parts, it is considered to be a complete flower.
Explanation:
What occurs when a solid substance dissolves into a liquid?
A. It stays solid and floats on the top of the liquid substance.
B. It changes the liquid substance into a solid substance.
C. It breaks down and becomes part of the liquid substance.
D. It stays solid and sinks to the bottom of the liquid substance.
Answer:
It stays solid and sinks to the bottom of the liquid substance.
Choose a body system and write about what kind of music it would listen to. write 2 sentences for full credit.
Answer : Music is read differently in the brain than
nonmusical tones and is connected to many different areas of the brain. Learning music
relegates a larger part of the brain to recognizing and interpreting music. Listening to
music has also been found to have an effect on learning.
Answer:
The heart would listen to music with a nice rhythm as it beats to the song.
Explanation:
what is a lone pair
Answer:
A lone pair is a pair of electrons occupying an orbital in an atom or molecule and not directly involved in bonding.
Explanation:
Answer:
A pair of electrons that is not used in bonding
Explanation:
I took the test
When a light switch is turned on, it releases more energy than it had when it was off. True or False. And Why?
Answer:
True
Explanation:
When activated it needs to burn energy, this excess energy will be released as heat, if it is off it releases no energy will be used therefore no energy will be released.
3. Answer INCREASE, DECREASE or REMAIN THE SAME. Explain your answer.
a) The density of water _______ as water changes from liquid to steam.
b) As the temperature increases, the rate of diffusion of a gas _______.
c) At constant volume, if the temperature of a gas is decreases, its pressure _______.
Answer:
a) decrease
b) increase
c) decrease
Explanation:
a) The density of water decreases as water changes from liquid to steam.
The density of substances are higher when their molecules are very close to each other having strongest bonding forces. When water is change from liquid to steam it means water molecules are not close to each other as they are in liquid state because now water is changed into gaseous form and molecules are further apart from each other. Thus, density goes to decrease.
b) As the temperature increases, the rate of diffusion of a gas increase.
As temperature increases molecules gets more kinetic energy and rate of diffusion increases.
c) At constant volume, if the temperature of a gas is decreases, its pressure decreases.
According to Gay-Lussac Law,
The pressure of given amount of a gas is directly proportional to its temperature at constant volume and number of moles.
Mathematical relationship:
P₁/T₁ = P₂/T₂
As temperature decreases its pressure also goes to decrease and vice versa.
Does phosphate have the ability to conduct electricity?
Answer:
Red phosphorous can vary in colour from orange to purple, due to slight variations in its chemical structure. The third form, black phosphorous, is made under high pressure, looks like graphite and, like graphite, has the ability to conduct electricity.
Explanation:
A particular state of matter has atoms that are packed closely together and vibrating in fixed positions. A phase change occurs and the matter changes to a state where the atoms are spaced far apart and are moving about randomly. What can you infer has occurred?
Answer:
it goes to a solid to a liquid
Explanation:
When something is a solid the molecules are impact together and have a small sense of vibration. But as the solid melts away for example ice, the molecules become more loose forming into a liquid
Answer:
demos los
Explanation:
AFTER the digestive system process food, the energy stored in cells as ______________ .
radiant energy
mechanical energy
thermal energy
chemical energy
