Jaclyn's coffee was too hot to drink so she placed the cup in the freezer for 10 minutes. What did Jaclyn know about heat that caused her to take this action?
Answer:
Jaclyn knew that Hot temperatures are cooled when out into a colder area.
Consider the following reaction:
4FeS2 + 11O2 → 2Fe2O3 + 8SO2
When 28.42 grams of FeS2 reacts with 5.44 grams of O2, how many grams of SO2 are formed?
What is the limiting reactant?
What is the excess reactant?
I'm begging
PLZ SOMEONE HELP I’LL MARK AS BRAINLIEST!!!
In an experiment 10 grams of a substance has a volume of 24 cm? What is the
substances' density ?
Answer:
[tex]d=0.417\ g/cm^3[/tex]
Explanation:
Given that,
Mass, m = 10 g
Volume, V = 24 cm³
We need to find the density of the substance. We know that, the density of a substance is given by :
Density = mass/volume
So,
[tex]d=\dfrac{10\ g}{24\ cm^2}\\\\d=0.417\ g/cm^3[/tex]
So, the density of the substance is [tex]0.417\ g/cm^3[/tex].
How is a radioactive element different from a stable element?
Radioactive elements are the elements into which an atom is very unstable or highly reactive because it is having more energy in its nucleus. stable elements are those who have stable and there shell are properly filled with electrons.
What are radioactive elements and stable elements?Most radioactive chemical elements have one or more radioactive isotopes on the other hand some chemical elements only have one type of radioactive isotopes.
A radioactive element has an unstable nucleus that emits particles in the form of alpha, beta, or gamma radiation and stable element have stable nucleus with no effect of any radiation or energy due to fully filled orbitals.
Bombarding of these radiations has to be done in the nucleus of the element after this the desired element will become a radioactive element. And there is no effect of these rays on stable elements beacuse they are unreactive to this.
The ray of alpha beta and gamma consists of some charges within them and they are radioactive radiations harmful to human eyes.
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What is the chemical name for F5N3
Answer:
Fluorine azide or triazadienyl fluoride (FN3) is a yellow green gas composed of nitrogen and fluorine with formula FN3. It is counted as an interhalogen compound, as the azide functional group is termed a pseudohalogen. It resembles ClN3, BrN3, and IN3 in this respect.
Explanation:
Answer:
I think it is Fluorine not sure tho
Explanation:
why is Cu+O=2CuO unbalanced
Answer:
because the product of CuO contains 2 molecules so it is unbalanced
Explanation:
to balance it 2Cu+2O=4CuO now it is balanced
help me please this is chemistry
How much of a 10 M solution is needed to make 1 liter of all solution?
a. 1ml
b. 1000ml
c. 10ml
d. 100ml
Answer:
b is the answer 1000ml
please mark me brainlist
Which of these would most likely happen to a species that is not able to adapt to a changing environment?
Answer:
If a species cannot adapt to the changes in their ecosystem, they may move to another location. If they will not move, the species may become threatened, endangered or extinct.
Explanation:
The way the question is worded, it sounds like there are options for you to chose from that you are not showing. I could help you out more if I actually knew the options.
Extinction is likely if conditions change faster than a species can evolve, and if members of that species lack the traits required to survive in the new environment.
What is an extinction ?The death of all members of a species of plants, animals, or other organisms is referred to as extinction.
The primary cause of higher extinction rates is habitat loss. Other causes include habitat changes, commercial overexploitation of wildlife, the introduction of harmful nonnative species, pollution, and disease spread.
If a species is unable to adapt to changes in its ecosystem, it may relocate. The species may become threatened, endangered, or extinct if they do not move.
Thus, Extinction is likely if environmental conditions change faster than a species can evolve and members of that species lack the traits needed to survive in the new environment.
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the 3 factors that affect the process of Natural Selection
Answer:
Overproduction of Offspring. The first of these factors that must be present in order for Natural Selection to occur is the ability of a population to overproduce offspring.
Variation.
Selection.
Reproduction of Adaptations.
Explanation:
Neptune _____.
is a terrestrial planet
has a nearly horizontal axis
was discovered by mathematical calculations
is the largest planet in the solar system
Answer:
C. Was Discovered by Mathematical calculations
Explanation:
Terrestrial Planets are Inner Planets (Mercury,Venus,Earth,Mars) and Neptune is an ice giant or gas giant, Neptune is also not the largest planet in the solar system, I believe that's Jupiter. I don't know for sure if Neptune has a horizontal axis but my best guess is C. I hope this helps! :^)
Iron(II) sulfide has a molar mass of 87.91 g/mol. 50 grams of
this substance would contain about 3.011 x 1023 molecules.
TRUE
FALSE
Answer:
true
Explanation:
Answer:
[tex]\boxed {\boxed {\sf False}}[/tex]
Explanation:
We want to know if 50 grams of iron (II) sulfide contains 3.011 * 10²³ molecules. Let's calculated and check.
1. Convert Grams to MolesWe know there are 50 grams of iron (II) sulfide or FeS If we want to convert from grams to moles, we use the molar mass (mass per 1 mole). This is given to us and it is 87.91 grams per mole for this substance. Let's create a ratio.
[tex]\frac {87.91 \ g \ FeS}{ 1 \ mol \ FeS}[/tex]
We want to convert 50 grams of FeS to moles, so we multiply by this value.
[tex]50 \ g \ FeS *\frac {87.91 \ g \ FeS}{ 1 \ mol \ FeS}[/tex]
Flip the ratio so the grams of FeS cancel.
[tex]50 \ g \ FeS *\frac {1 \ mol \ FeS}{ 87.91 \ g \ FeS}[/tex]
[tex]50*\frac {1 \ mol \ FeS}{ 87.91}[/tex]
[tex]\frac {50}{ 87.91} \ mol \ FeS[/tex]
[tex]0.5687635081 \ mol \ FeS[/tex]
2. Convert Moles to Molecules1 mole of any substance contains the same number of particles (atoms, molecules, formula units, etc.). This is Avogadro's Number or 6.022 *10²³. In this case, the particles are molecules of FeS. Create another ratio.
[tex]\frac {6.022 *10^{23} \ molecules \ FeS}{ 1 \ mol \ FeS}[/tex]
We want to convert 0.5687635081 moles of FeS to molecules, so we multiply by this value.
[tex]0.5687635081 \ mol \ FeS*\frac {6.022 *10^{23} \ molecules \ FeS}{ 1 \ mol \ FeS}[/tex]
The units of moles of FeS cancel.
[tex]0.5687635081 *\frac {6.022 *10^{23} \ molecules \ FeS}{ 1 }[/tex]
[tex]0.5687635081 *{6.022 *10^{23} \ molecules \ FeS}[/tex]
[tex]3.42509385*10^{23} \ molecules \ FeS[/tex]
If we round to the thousandth place, the 0 in the tenth thousandth place tells us to leave the 5.
[tex]3.425*10^{23} \ molecules \ FeS[/tex]
50 grams of iron (II) sulfide is approximately 3.425 * 10²³ molecules, not 3.011 *10²³ so the statement is false.
The air pressure above a large body of water off the coast of Florida is much higher compared to the air above the coast. What direction would the wind blow in this situation? (i know its kinda easy but im dum please help)
A
from the ocean to the coast
B
from the coast to the ocean
C
from the ocean, vertically into the sky
D
from the coast, vertically into the sky
The direction in which the wind will blow in this situation is from the ocean to the coast and is denoted as option A.
What is Pressure?
This is defined as the force per unit area of a body and the unit is Pascal. We were told that air pressure above a large body of water is higher than the air above the coast.
This will make the wind blow from the ocean to the coast as the ocean has a higher pressure.
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Suppose you see a crescent Moon. How do you know if it is waxing or waning?
Answer:
waxing is in the evening and waning is in the morning if you cant see the moon in the evening it is waning if you can see it in the evening it is waxing
Consider the statement, “In a chemical reaction, atoms are neither created nor destroyed, only rearranged.” Why is this a statement of the law of conservation of mass?
Answer: The law of conservation of mass is reffering to the fact that energy cannot be created or destroyed. So when you speak about atoms not being created or destroyed it is the same thing. Unless you're talking about an atomic bomb where the atoms are split.
In a chemical reaction, the total mass present is equal to the mass of all the atoms undergoing the reaction.
According to the law of conservation of mass, mass is neither created nor destroyed but can be converted from one form to another. In a chemical reaction, atoms are rearranged. However, the total number of atoms in the system remains constant.
So, the total mass present in the system is equal to the mass of all the atoms undergoing the reaction. Since atoms are only rearranged, no new atom is formed and no atom disappears in the reaction, the total mass of the system remains constant.
For this reason, the statement; “In a chemical reaction, atoms are neither created nor destroyed, only rearranged" is a statement of the law of conservation of mass.
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how many moles in 200 grams of Br
Define activation energy.Activation energy is Define activation energy.the energy barrier that must be surmounted in order for the reactants to transform into products.the energy difference between the reactants and the products.the energy released by the reactants while transforming into products.the energy released by the products while transforming into reactant
Answer:
the energy barrier that must be surmounted in order for the reactants to transform into products.
Explanation:
When we draw a reaction profile, there is always a hump that is found between the reactants and products. This hump is called the activation energy.
The activation energy of a reaction stands as a sort of barrier between reactants and products which must be surmounted before the reactants are converted into products.
Only reactants that possess the activation energy can be converted from reactants to products.
select all that are heterogeneous mixtures.
A) soil
B) steel
C) concrete
D) kool-aid
E) open can of soda
which organism ( grass, prairie, dog, ferret, or fox) do you think is a producer (does not depend on another organism for its food)?
Answer:
grass
Explanation:
Grass is at the very bottom of the food chain and relies solely on sunlight and water, which aren't organisms. I'm going to assume you meant prairie dog because a prairie isn't an organism, but prairie dogs rely on grass for food. Ferrets rely on meat for food (which they get from other animals) and foxes rely on other animals for food as well. Therefore, grass is the only organism that is a producer (gives other organisms food) and doesn't rely on other organisms for food.
Answer:
Grass
Explanation:
A producer or autotroph is an organism that produces its own food. These include plants, algae, and some bacteria. They convert carbon dioxide, water, and light energy from the sun into glucose, a type of sugar that provides energy, in the process of photosynthesis.
The organisms we are given are grass, prairie dog, ferret, and fox. The only plant is grass. Prairie dogs, ferrets, and foxes are all consumers, and depend on other organisms (plants, grass, leaves, or other animals for meat) for food.
Therefore, the producer in this list is grass.What is considered the human body's largest organ?
Answer:
The skin
Explanation:
The skin is the largest organ of the body. The skin and its derivatives (hair, nails, sweat and oil glands) make up the integumentary system. One of the main functions of the skin is protection. It protects the body from external factors such as bacteria, chemicals, and temperature.
The equation below represents the equilibrium state of aqueous phosphoric acid.
H3PO4(aq) ↔ H+(aq) + H2PO4-(aq)
Which of the following is equal to the ionization constant Ka?
A
[H2PO−4][H+][H3PO4]
B
[H+][H3PO4][H2PO4]
C
[H+][H2PO−4][H3PO4]
D
[H3PO4][H+][H2PO−4]
Answer:
.
Explanation:
[tex]K_a=\frac{[H_2PO_4^-][H^+]}{[H_3PO_4]}[/tex]
K, the equilibrium constant, is equal to products over reactants raised to their coefficients (excluding solids and liquids and only including aqueous and gasses)
[tex]Ka=\frac{[H_2PO_4^- ][H^+]}{H_3PO_4}[/tex] is the equilibrium constant and is equal to products over reactants raised to their coefficients (excluding solids and liquids and only including aqueous and gasses). Hence, option A is correct.
What is equilibrium?A state of balance between opposing forces or actions.
A number that expresses the relationship between the amounts of products and reactants present at equilibrium in a reversible chemical reaction at a given temperature.
[tex]Ka=\frac{[H_2PO_4^- ][H^+]}{H_3PO_4}[/tex]
K, the equilibrium constant, is equal to products over reactants raised to their coefficients (excluding solids and liquids and only including aqueous and gasses)
Hence, option A is correct.
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Explain why gases such as the oxygen found in tanks used at hospitals are compressed. Why must care be taken to prevent compressed gases from reaching a high temperature?
Answer:
Large amount of gas can be stored in small container.
Explanation:
They are compressed so that a larger amount of gas can be stored in a smaller container. A greater mass confined to a smaller volume makes transporting and storing of gases easier. Increasing temperature increases pressure, and the cylinders might explode.
How many moles are there in 8.25 x 10^26 molecules of methane (CH4)?
Answer:
i dont know
Explanation:
because i dont know 45
How many grams are in 4.00 moles of glucose, C6H120
Answer:
[tex]molar \: mass = (6 \times 12) + (12 \times 1) + 16 \\ = 100 \: g \\ 1 \: mole \: weighs \: 100 \: g \\ 4.00 \: moles \: will \: weigh \: (4 \times 100) \: g \\ = 400 \: g[/tex]
what is the mass of 4 moles of almunium atom
Answer:
108 grams
Explanation:
A sample of helium has a volume of 3.49 L at 741 mmHg. What would be the volume if the pressure
were changed to 760 mmHg at the same temperature?
show work
P1: 741 mmHg
V1: 3.49 L P1 x V1 / P2= (741 mmHg) (3.49 L) / 760 mmHg = 3.40 L
P2: 760 mmHg
V2: ? L
The number of molecules in 1.00 liter of O2 gas at 56◦C and 821 torr is
1. 1.83 × 1025 molec.
2. 32 molec.
3. 2.24 × 1023 molec.
4. 2.41 × 1022 molec.
5. 4 × 10−2 molec.
Answer:
2. 2.41 x 10^22 molec
Explanation:
Answer:
2. 2.41 x 10^22 molec
Explanation:
the other person said that and i got right on my quiz
A base is a substance which neutralizes an acid. Which of these substances is not a base?
A. aqueous ammonia
B. sodium chloride
C. sodium carbonate
D. calcium oxide
Among these, sodium chloride is a substance which is not a base, therefore option (b) is correct.
What do you mean by a base in a chemical reaction?A base is a chemical species that donates electrons, accepts protons, or releases hydroxide (OH-) ions in aqueous solution. A base is a molecule or ion able to accept a hydrogen ion from an acid.
A strong base completely dissociates into its ions in water. Bases react vigorously with acids and organic matter. Bases react in predictable ways with pH indicators.
A base substance is a solution that has a pH level of more than 7. Bases react with acids to form salts which is called neutralization reaction.
Among these since sodium chloride is not a base, hence option(b) is correct.
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What is caffeine atomic number?
No links
Answer:
Caffeine has no atomic number
Explanation:
Caffeine is a compound, not an element. Therefore it cannot have an atomic number.
Kinetic energy CANNOT be converted into potential energy
True
False
Answer:
false
Explanation:
Answer:
False
Explanation:
Because if you shoot a arrow and go back and get it and use it again it is potential