Answer:
outer or non - luminous
Explanation:
complete combustion of wax takes place in non-luminous zone of a candle flame.
Answer:
A complete combustion of wax takes place in outer zone of a candle flameExplanation:
The middle zone is yellow and luminous because As it is an oxygen-depleted zone, insufficient oxygen exists to burn all of the wax vapor. ... The outer zone is the area where the flame is the hottest and complete combustion of wax takes place.Which item is most likely to dissolve faster in water. A sugar cubes. B powdered sugar pls helpp
Answer:
Powdered sugar , it has much more surface area for the state change to occur over
Explanation:
I hope this helps.
What volume, in liters, does 128 grams of O2 occupy at STP?
89.6 L
22.4 L
67.2 L
44.8 L
Answer: 89.7 L
Explanation:
89.6 volume, in liters, does 128 grams of O2 occupy at STP. Therefore, option A is correct.
What do you mean by volume ?A volume is simply the amount of space taken up by any three-dimensional solid. A cube, a cuboid, a cone, a cylinder, or a sphere are examples of solids. Volumes differ depending on the shape.
Every three-dimensional object requires some amount of space. The volume of this space is measured. Volume is defined as the space occupied by an object within the boundaries of three-dimensional space. It is also known as the object's capacity.
1 mole Oxygen has mass 32 grams
Mole of Oxygen in 128 g mass = 128 g / 32 g/mol
= 4.0 mol O2
At Standard temperature and pressure this has volume
= 4.0 mol × 22.4 L/mol
= 89.6 L
Thus, 89.6 volume, in liters, does 128 grams of O2 occupy at STP, option A is correct.
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6. What does a numerical subscript following a set of parentheses in a chemical
formula mean?
A numerical subscript following a set of parentheses represents the number of the group or poly-atomic ion in parentheses are present in a chemical formula.
As an example, calcium hydroxide is [tex]\bold { Ca(OH)_2 }[/tex] . The subscript (2) indicates that calcium hydroxide contains two hydroxide ions.
Therefore, A numerical subscript following a set of parentheses represents the number of the group or poly-atomic ion in parentheses are present in a chemical formula.
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2C3H7OH + 9O2 -> 6CO2 + 8H2O
How Many Moles of CO2 can be produced by reacting 6 moles of C3H7OH with oxygen?
Answer:
Up to [tex]18\; \rm mol[/tex] [tex]\rm CO_2[/tex].
Explanation:
The equation for this reaction: [tex]2\; \rm C_3 H_7 OH + 9\; O_2 \to 6\; CO_2 + 8\; H_2O[/tex] is indeed balanced.
Notice that the coefficient of [tex]\rm C_3 H_7 OH[/tex] is [tex]2[/tex] while that of [tex]\rm CO_2[/tex] is [tex]6[/tex].
Therefore, each unit of this reaction would consume [tex]2[/tex] units of [tex]\rm C_3H_7OH[/tex] while producing [tex]6[/tex] units of [tex]\rm CO_2[/tex]. In other words, this reaction would produce three times as much [tex]\rm CO_2\![/tex] as it consumes [tex]\rm C_3H_7OH\![/tex].
If all that [tex]6\; \rm mol[/tex] of [tex]\rm C_3H_7OH[/tex] molecules are actually consumed through this reaction, three times as many [tex]\rm CO_2[/tex] molecules would be produced. That corresponds to [tex]3 \times 6\; \rm mol = 18\; \rm mol[/tex] of [tex]\rm CO_2\![/tex] molecules.
describe a difference in our inner planets and outer planets
the substance that can not be further decomposed by ordinary chemical means is
A.water
B.gold
C.sugar
D.air
1) how can you make a solution more concentrated
Explanation:
solvent bc when you remove it it becomes more concentrate
What energy associated with light that allows us
to see colors on the ROYGBIV spectrum?
Answer:
Visible light waves let you see the world around you. The different frequencies of visible light are experienced by people as the colors of the rainbow.
Explanation:
Pure metals are _____.
used less often than alloys
are more resistant to corrosion than alloys
used more often than alloys
harder than alloys
Answer:
Pure metals are those metals that have not been alloyed with other metallic elements; commercially pure metals are 99% pure minimum.
Explanation:
What other substance (besides salt) could you sprinkle over ice to affect how fast it melts? Describe how you would test the substance's impact on the melting time of ice. Predict the results of such a test.
Answer:
See explanation
Explanation:
Salt makes ice to melt faster than it usual. Sugar is another substance that influences the melting time of ice.
If i have a sample of pure ice and another sample of ice treated with sugar. I have to maintain the both initially at 0 degrees temperature and have a stop clock to measure the melting time.
I will ultimately notice that the sample of ice treated with sugar will melt faster than the pure sample of ice due to the presence of an impurity.
what mass of NH3 (g) is produced when 2 x 10^23 molecules of N2 reacts
Answer:
m=8.58
Explanation:
[tex]n = \frac{m}{mr} [/tex]
N=n÷la
Mole measure the number of elementary entities of a given substance that are present in a given sample. Therefore, what mass of NH[tex]_3[/tex] (g) produced is 11.23 g.
What is mole?The SI unit of amount of substance in chemistry is mole. The mole is used to measure the quantity or amount of substance. We know one mole of any element contains 6.022×10²³ atoms which is also called Avogadro number.
N[tex]_2[/tex] + 3H[tex]_2[/tex] [tex]\rightarrow[/tex] 2NH[tex]_3[/tex]
moles of N[tex]_2[/tex]= given number of molecules/ 6.022×10²³
= 2 x 0²³/ 6.022×10²³
= 0.33 moles
moles of NH[tex]_3[/tex] produced= moles of N[tex]_2[/tex]×2
=0.66moles
mass of NH[tex]_3[/tex]= moles of NH[tex]_3[/tex]×Molar mass of NH[tex]_3[/tex]
= 0.66 × 17.03
=11.23 g
Therefore, what mass of NH[tex]_3[/tex] (g) produced is 11.23 g.
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How many electrons are being shared between the two carbon atoms in the covalent compound ethyne? Ethyne has the structure: H−C≡C−H
Answer:
Three lines between the carbon atoms in the Lewis structure represent three covalent bonds. Each covalent bond is a shared pair of electrons, hence there are six electrons being shared between the carbon atoms in ethyne.
The number of electrons that are being shared between the two carbon atoms in the covalent compound ethyne is six.
What are covalent bonds?Covalent bond are formed by the sharing of electrons between two atoms.
In ethyne molecule two carbon atoms are present and between two carbon atoms three covalent bonds are present. And each covalent bond is formed by the sharing of two electrons. So three covalent bonds are formed by the sharing of 6 electrons.
Hence in ethyne 6 electrons are being shared.
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In a dynamic equilibrium between the liquid state and the gas state, the rate of evaporation
A. is greater than the rate of condensation
B. is less than the rate of condensation
C. is equal to the rate of condensation
who is princess tianas best friend, if you can get her name right then ill give you brainliest
Answer:
Oo i think her name is Tiana..... ❤️❤️Answer:
Charlotte La Bouff
Explanation:
"Lottie" if you will
Use the periodic table to determine which of the
following could be an isotope of bromine (Br).
Check all that apply.
Z = 79, A = 196
Z = 35, A = 79
A = 79, N =44
D Z = 44, N = 44
DONE
if I have a +2 oxidation number do I give up or accept electrons?
Answer:
I will give up the electrons
Explanation:
Consider the following rules:
1. An atom loses electrons if its oxidation number is positive.
2. An atom gains electrons if its oxidation number is negative.
3. An atom neither gains nor loses electrons if its atomic number is zero.
As I have an oxidation number [tex]+2[/tex] that is oxidation number is positive, so, I will give up electrons.
The domain level divides
organisms based on the
differences between
eukaryotes and
prokaryotes. Eukaryotes
have a nucleus in their
cells. Which BEST describes
prokaryotes?
A. Prokaryotes are nonliving things.
B. Prokaryotes do NOT have a nucleus.
C. Prokaryotes include all plant life.
D. Prokaryotes cannot reproduce.
Answer:
B. Prokaryotes do NOT have a nucleus.
When iron (iii) oxide, Fe2O3, and aluminum are heated together at a high temperature, iron (Fe) and aluminum oxide (Al2O3) is formed
1.What is the meaning of the symbol (iii) in iron (iii) oxide?
2.Write a balanced equation for this reaction
How does Earth's rotation affect ocean currents?
Lesson 2.09
Question 9 options:
It causes them to flow in a curved path
It has no affect
It causes them to flow from east to west
It causes them to flow from north to south
Answer:
Our planet's rotation produces a force on all bodies moving relative to theEarth. ... The force, called the "Coriolis effect," causes the direction of winds and ocean currents to be deflected.
Explanation:
Earth's rotation affect ocean currents because: A. It causes them to flow in a curved path.
What is Earth rotation?Earth rotation can be defined as the amount of time that is taken by planet Earth to complete its spinning movement about an orbital axis.
This ultimately implies that, Earth rotation refers to the time taken by earth to rotate once on its axis. Also, a spinning movement of the Earth on its axis takes approximately 24 hours to complete with respect to the Sun and it result in an effect called Coriolis.
In conclusion, Earth's rotation affect ocean currents because it causes them to flow in a curved path due to Coriolis effect.
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HELLPPPPPP!
Why does the freezing of water, exothermic process,become spontaneous at temperatures below 0° C even though the entropy of liquid water decreases during the phase change?
Answer:
Because the melting of ice as a spontaneous process (or reaction).
Explanation:
Here is an example:
Take a ice on a plate and leave it for half an hour (conditions). After half an hour, we notice water instead of ice.
This process took place without any intervention from your side. Heat absorbed by the ice from surrounding is due to set of conditions not due to your intervention.
So, we can consider melting of ice as a spontaneous process (or reaction).
Name the bond between atoms that share electrons
What is a molecule
Give five examples of molecular elements
Draw a diagram to show the bonding in
Carbon dioxide Methan
hydrogen chlorine
Answer:
1) Covalent bond, in chemistry, the interatomic linkage that results from the sharing of an electron pair between two atoms. The binding arises from the electrostatic attraction of their nuclei for the same electrons.
2)A molecule is the smallest particle in a chemical element or compound that has the chemical properties of that element or compound. Molecules are made up of atoms that are held together by chemical bonds. These bonds form as a result of the sharing or exchange of electrons among atoms.
3)Hydrogen (H2), oxygen (O2), and chlorine (Cl2) molecules, for example, each contains two atoms. Another form of oxygen, ozone (O3), has three atoms, and sulfur (S8) has eight atoms. All elemental molecules are made of atoms of a single element.
Explanation:
PLEASE MARK ME AS BRAINLIEST
explain why temperature is not as hot during the summer when a city is on a body of water (for example San Diego vs. Imperial Valley).
Answer:
because the water brings a cool breeze when the wind blows
Explanation:
_C3H602 + _ 02 → _ CO2 +_ H20
balance the equation
Answer:
balanced plz give correct question
(41). Which of the following molecules is (are) polar? For each
polar molecule, indicate the direction of polarity—that is,
which is the negative end, and which is the positive end
of the molecule.
(a) BeCl2
(c) CH3C
(b) HBF,
(d) SO3
Answer:
The oxygen is the negative end of the molecule, while the area between the hydrogen atoms is the positive end of the molecule. Figure 2. Water is a polar molecule, as greater electron density is found around the more electronegative oxygen atom.
A confined quantity of a gas has a pressure of 2.50 atm and a temperature of -22⁰C. What is the new pressure if the temperature is increased to 22⁰C?
a. 2.1 atm
b. 2.5 atm
c. 2.94 atm
d. 3.41 atm
Answer:
C Ian sure2.94atm
Explanation:
I am low student
Temperatures in the upper atmosphere (thermosphere) reach 1500°C (2700°F), yet it does not produce
enough heat to burn you. Why?
if im not mistaken its because the ozone layer
What is the relationship between temperature and kinetic energy?
When all molecular motion stops, the temperature stop charging.
As molecules move more quickly, temperature increases.
When all molecular motion stops, the temperature starts to decrease.
As a molecules slow down, temperature starts to increase.
Answer:
As molecules move more quickly, temperature increases.
Explanation:
Kinetic energy can be defined as an energy possessed by an object or body due to its motion.
Any material or object that allow the conduction (transfer) of electric charge or thermal energy is generally referred to as a conductor. Some examples of a conductor are metals, copper, aluminum, graphite, etc.
In the process of heat conduction, thermal energy is usually transferred from fast moving particles to slow moving particles during the collision of these particles. Also, thermal energy is typically transferred between objects that has different degrees of temperature and materials (particles) that are directly in contact with each other but differ in their ability to accept or give up electrons.
Hence, the relationship between temperature and kinetic energy is that as molecules move more quickly, temperature increases due to the absorption of heat.
BRAINLIEST!
How do the ions in metals behave?
a They are negatively charged.
b They are repelled by electrons.
c They are attracted to each other.
d They are repelled by each other.
Answer:
attracted towards each other
Explanation:
hope u like the ans
Answer:
The ions in metal behavior by repelled by electro
You have two samples, one is calcite and the other is halite.
How would you differentiate between without using any equipment?
A- Colour
B- Specific gravity
C- Hardness
D- Cleavage
Answer:
c
Explanation:
You can differentiate between calcite and halite without using any measuring equipment based on: C. Hardness.
What is a mineral?A mineral can be defined as a form of naturally occurring, inorganic solid substance that is typically characterized by a crystal structure.
The properties of a mineral.In Science, the properties that can be used to identify and differentiate two or more minerals include the following:
LusterStreakHardnessIn conclusion, hardness is a mineral property that can be used to differentiate between calcite and halite without using any measuring equipment.
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What is the chemical formula for Tetrasulfur pentoxide?
Answer:
S 4 O 5
Explanation:
the 4 and 5 are little