Given :
There are 0.090 moles of sugar (C₁₂H₂₂O₁₁) in the average can of soda.
To Find :
How many sugar molecules would this be ?
Solution :
We know, in 1 mole of any compound their are [tex]6.022\times 10^{23}[/tex] molecules of that compound.
So, number of molecules in 0.090 moles of compound is :
[tex]n = 0.090 \times 6.022 \times 10^{23}\\\\n = 5.42\times 10^{22}[/tex]
Therefore, number of molecules in 0.090 moles of compound is [tex]5.42 \times 10^{22}[/tex] .
Which objects in the sky have rings or moons that revolve around them? Asteroids Comets Planets Stars
Answer:
asteroids have rings around them
A student says that since the atomic theory is just a theory, it should not be considered useful. Which
statement best argues against the student's opinion? (2 points)
O Scientific theories change over time.
O Scientists often do not agree about specific details of scientific theories.
O Scientists often propose competing theories.
O Scientific theories do not become Scientific Laws.
O Scientific theories are the results of many experiments and observations.
Answer:
O Scientific theories are the results of many experiments and observations.
Explanation:
Going through the options;
O Scientific theories change over time.
This is true and supports the student's opinion. So wrong option!
O Scientists often do not agree about specific details of scientific theories.
This is true. However, it supports the student's opinion. So wrong option!
O Scientists often propose competing theories.
This is true. However, it supports the student's opinion. So wrong option!
O Scientific theories do not become Scientific Laws.
This is False. Theories that have withstood the test of time and countless experiments become laws. However it support's the student's opinion. So wrong option!
O Scientific theories are the results of many experiments and observations.
This is true and is against the student's opinion. This option is correct!
Which statement most accurately describes the compound formed by calcium and phosphorous?
Answer:
Bones
Explanation:
which Two of the following are pure substances*
A. Compounds
B. Elements
C. Solutions
D. Mixtures
Answer:
I think A and B
Explanation:
Answer:
A. & B.
Explanation:
Neither can be broken down into something besides an atom, the "purest" form matter can exist in. For example, if you were to break down C6H12O6 (glucose), you wouldn't be able to break down a singular atom of carbon into something different.
What coefficient should go in front of the hydrogen peroxide (H2O2 ) molecule to make the chemical equation balanced? ___ H2O2 ➞ 2 H2O + O2
Answer:
2
Explanation:
H2O2 ➞ 2 H2O + O2
The reaction is currently not balanced because the number of atoms on the reactant side is not equal to that of the product side
Hydrogen
Reactant = 2 Product = 4
Oxygen
Reactant = 2 Product = 4
Adding 2 to H2O2 balances the reaction as the number of atoms of both elements are now balanced on both sides of the equation
2H2O2 ➞ 2 H2O + O2
Can someone please help
Answer:
Water is the answer
Explanation:
give two areas where the compressible nature of gas is applied
Answer:
1. Gases can be easily liquefied into very small volumes and stored in liquid form Eg in LPGA cylinders and used in homes.
2. Balloons can be easily filled with air.
The fact that a gas is easily compressible is applied in the colling devices such as air conditioners as well as in the pumping of tyres with air.
Are gases compressible?Gases are easily compressible because they do not have a definite volume. This is positively applied in many areas of life.
The fact that a gas is easily compressible is applied in the colling devices such as air conditioners as well as in the pumping of tyres with air.
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What is the best description of what has happened to flowers when they change color as they mature?
A. a physical reaction
B. a chemical reaction
C. a formation of a mixture
PLSSS HELP MEEE
Answer:
The answer is (A)
Explanation:
When the weather changes, nature also changes because most plants rely on photosynthesis and if they don't get as much light then they can't support as much as they used causing them to shut down parts of the plant.
Is sodium sulfide a ionic or covalent
Answer:
I would say iconic
Explanation:
please correct me if i am wrong
Sodium sulfide compound is an ionic compound. There are 2 Na atoms per 1 Sulfide atom.
Ions with opposing charges are created in ionic compounds when metal atoms transfer electrons to nonmetal atoms. Sodium gives one electron to sulphur in the case of sodium sulphide, resulting in the formation of positively charged sodium ions (Na+) and negatively charged sulphide ions (S2-). The complex is held together in a lattice structure by the electrostatic attraction between these ion pairs with opposing charges. Sodium sulfide's high melting and boiling temperatures, as well as its capacity to conduct electricity when melted or dissolved in water, are indications of its ionic nature.
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I WILL MARK Brainest
Hi, I really need help, my mental health is horrible right now and I can’t do any work, and I really just need help answering these questions because I really don’t want to get bad marks but I don’t have the motivation to do anything, thanks so much!
Consider this reaction:
H2(g) + Cl2 (g) 2 HCl (g)
How many liters of HCl are produced when 11.2 L of chlorine are reacted with excess hydrogen?
(One mole of any gas occupies 22.4L under certain conditions of temperature and pressure. Assume those conditions for this
question.)
22.4L
56 L
112 L
224 L
All objects in space obey the law of ________.
Answer:
physics, including the laws of gravity
Explanation:
please help me i’m struggling
Answeeeeer:
A. cell
Explanation:
Since A is the smallest in the chart, that would correspond to the cell because thats the smallest out of Tissue, Organ and Organism.
Which is true of synthesis and decomposition reactions
Complete question is;
What is true of synthesis and decomposition reactions?
A) Synthesis reactions require more energy than decomposition reactions.
B) Synthesis reactions produce more products than decomposition reactions.
C) Synthesis reactions are the opposite of decomposition reactions.
D) Synthesis reactions have fewer reactants than decomposition reactions.
Answer:
C) Synthesis reactions are the opposite of decomposition reactions.
Explanation:
Correct answer is option C. This is because, Synthesis reactions are defined as those whereby substances are combined together to form larger molecules/compounds. Whereas, decomposition reactions are the opposite due to the fact that they involve the breakdown of two or more substances.
Which process uses the least amount of material to create electricity, coal or uranium, coal or nuclear power plant?
Answer:
nuclear power plant
Explanation:
Generation of electricity often involves the use of some kind of material or energy that is consumed as electricity is generated. There are various ways of generating electricity such as;
By burning coal
Use of a radioactive element as nuclear fuel
From wind energy
From water
From the sun, etc
Each process involves the intake of material or energy. The process that goes on in a nuclear power plant requires a radioactive fuel of which uranium is an example.
A nuclear plant uses the least amount of material (such as only 1g of uranium fuel) in electricity generation compared to the tons of coal burnt in order to generate electricity.
You live 10.13 km from school. Convert kilometres to meters.
Answer:
10130
Explanation:
there are 1000 m in a km
Answer:
10130 meters
Explanation:
What is the percent of oxygen in C6H12O6?
Answer and Explanation:
C6 H12 O6=6×16=96g/mol
96/180×100=53%
Can someone please help me with the with this
Answer:
Chemical
Explanation:
Think about exothermic reactions. Think about endothermic reactions. Compare and contrast the two. Give examples from the readings in your comparison. Also give examples from what you may already know
Answer:
any combustion reaction.
a neutralization reaction.
rusting of iron (rust steel wool with vinegar)
the thermite reaction.
reaction between water and calcium chloride.
reaction between sodium sulfite and bleach (dilute sodium hypochlorite)
reaction between potassium permanganate and glycerol.
Explanation:
A ring of pure gold has a mass of 17.3 grams. How many atoms of gold are in the ring?
Answer:
5.29936 x 10^23 atoms
Explanation:
To do this, we need to find the number of moles in the ring so that we can then multiply that by Avogadro's number (6.022×10^23).
equation for finding moles: [tex]n = \frac{mass}{M_{r} }[/tex]
substitute in the known values: [tex]n = \frac{17.3}{197 }[/tex]
divide to find the value of n: 0.088 mol
Multiply by Avogadro's constant: 0.088 x 6.022 x 10^23
= 5.29936 x 10^23 atoms in the ring.
hope this helps!
According to Avogadro's number, there are 5.289×10²² atoms of gold in 17.3 grams of ring.
What is Avogadro's number?Avogadro's number is defined as a proportionality factor which relates number of constituent particles with the amount of substance which is present in the sample.
It has a SI unit of reciprocal mole whose numeric value is expressed in reciprocal mole which is a dimensionless number and is called as Avogadro's constant.It relates the volume of a substance with it's average volume occupied by one of it's particles .
According to the definitions, Avogadro's number depend on determined value of mass of one atom of those elements.It bridges the gap between macroscopic and microscopic world by relating amount of substance with number of particles.
Number of atoms can be calculated using Avogadro's number as follows: mass/molar mass×Avogadro's number
In the given problem, number of atoms of gold is found out as, number of atoms=17.3/196.966×6.022×10²³=5.289×10²² atoms.
Thus, there are 5.289×10²² atoms of gold in the ring.
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is Copper(II) hydroxide ionic
most bacteria are ___ as they are unable to make their own food
Answer:
HETEROTROPHIC
Explanation:
Based on nutrition, organisms are classified into autotrophic and heterotrophic. Autotrophic organisms are organisms that are capable of making their own food using either light source (photosynthesis) e.g plants or chemical source (chemosynthesis) e.g some bacteria.
Contrarily, HETEROTROPHIC organisms are those that are unable to synthesize their own food themselves, hence, they rely on other organisms for their energy source. Types of heterotrophism include; saprophytism, predation etc. Most bacteria falls under this heterotrophic category because they are unable to make their own food.
The .......................................................... Is related to its tendency to give away electrons and form positive ions
Answer:
electropositivity or metallic character.
The ability of an atom to give away electrons and form positive ions i.e cations is known as electropositivity or metallic character.
How does water pressure relate to depth?
Organisms with traits best suited to their environment, survive during what process?
A. environmental change
B. natural selection
C. populations
D. theories
Answer: According to Charles Darwin's theory of evolution by natural selection, organisms that possess heritable traits that enable them to better adapt to their environment compared with other members of their species will be more likely to survive, reproduce, and pass more of their genes on to the next generation.
A violent disturbance in the atmosphere is a
eye of hurricane
surge
front
storm
Answer: Storm surge
Explanation:
6) The following questions refer to F2 and Cl2.
a. Draw the molecular model (space-filling or ball-and-stick) that would
provide the best means for comparing the differences in bond length and
bond energy.
b. Which structure has the longest bond length? Justify your answer.
c. Which bond has the greatest bond energy? Justify your answer.
d. Which structure has the least potential energy associated with its bond?
Justify your answer.
Answer:
chill
Explanation:
What is the correct order for the seasons of winter, spring, summer, and fall in the Northern
Hemisphere?
Answer:
Therefore, for temperate areas in the northern hemisphere, spring begins on 1 March, summer on 1 June, autumn on 1 September, and winter on 1 December. For the southern hemisphere temperate zone, spring begins on 1 September, summer on 1 December, autumn on 1 March, and winter on 1 June.
Explanation:
The correct order for the seasons of winter, spring, summer, and fall in the Northern Hemisphere is summer, spring and winter.
What is season?A season is a subdivision of the calendar year based on variations in the local climate, ecology, and amount of daylight hours. The axial parallel of Earth's inclinator orbit of the Sun causes seasons on Earth.
Seasons are distinguished by differences in the amount of sunlight reaching Earth's surface in temperate as well as polar areas. These fluctuations may lead certain animals to migrate or go into hibernation while others may cause vegetation to fall dormant. The correct order for the seasons of winter, spring, summer, and fall in the Northern Hemisphere is summer, spring and winter.
Therefore, the correct order for the seasons of winter, spring, summer, and fall in the Northern Hemisphere is summer, spring and winter.
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when gas changes to liquid is it gaining or loosing energy?
Answer:
Loosing energy
Explanation:
As the particles movement in gas slows down further when it is cooled
What happens to the pitch when the frequency of a sound wave decrease?
A it stays the same
B it decreases by that same amount
C it increases twice the amount
D it increases by the same amount
Answer:
B
Explanation:
Pitch is determined by frequency. So if frequency increases, pitch increases and produces a higher sound. If frequency decreases, pitch decreases and produces a lower sound. Frequency and wavelength are inversely related, meaning that if frequency increases, wavelength becomes shorter and vice versa