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Related Questions
The ______ properties of a substance can be observed only when it undergoes a change to become an entirely different kind of substance with different properties.
Enter the answer
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Answer:chemical
Explanation:
What ratio of NaCN to HCN is needed to prepare a pH 9.40 buffer? (Ka of HCN is 4.9 × 10⁻¹⁰)
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Answer: The ratio of NaCN to HCN is, 1.26
2KClO₃ → 2KCl + 3O₂ If 25.0 g of KClO₃ decompose, what mass of O₂ will form? *
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Answer: approximately 15.1 grams.
Explanation: The key to chemistry is to change everything to moles. Then when you have the answer in moles change the answer back to grams, liters, or whatever you want. Change 25 grams of potassium chlorate to moles. Chlorate is Cl with 3 oxygens. ate = saturated. Chlorine has seven valance electrons when it is saturated six of these electrons are used by oxygen ( 2 electrons per oxygen) leaving only 1 electron. 1 K x 39 grams/mole+1 Cl x 35.4grams/ mole+3 O x 16 grams/ mole = 122.4 grams / mole Potassium Chlorate 25 122.4 = moles. 2.05 moles of Potassium Chlorate. There is a 1:1 mole ratio. 1 mole of Potassium Chlorate will produce 1 mole of Potassium Chloride. 2.05 moles of Potassium Chlorate will produce 2.05 moles of Potassium Chloride. Find the gram molecular mass of Potassium Chloride. 1 K x 39 = 39+1 Cl x 35.4 = 35.4 = 74.4 grams / mole. 2.05 moles x 74.4 grams/ mole = 15.2 grams
The mass of O₂ that will be form is 9.8 grams
The chemical reaction is as follows:
2KClO₃ → 2KCl + 3O₂
From the reaction 2 moles of potassium trichlorate decompose to form 2 moles of potassium chloride and 3 moles of oxygen.
Therefore,
molar mass of KClO₃ = 39 + 35.5 + 48 = 122.5 grams
molar mass of O₂ = 32 grams
Therefore,
2(122.5) g of KClO₃ produces 3(32) grams of O₂
25 g of KClO₃ will produce ? grams of O₂
cross multiply
mass of O₂ produced = 96 × 25 / 245
mass of O₂ produced = 2400 / 245
mass of O₂ produced = 9.7959
mass of O₂ produced ≈ 9.8 grams
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What is the name of this hydrocarbon?
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Answer:In the given molecule the methyl group is attached at the second carbon atom of the parent chain. Therefore the name of hydrocarbon is 2-methylbutane.
Explanation:
Sorry for spamming but this is due tomorrow! Can someone help me please!!
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Answer:
1. in the Northern Hemisphere the vernal equinox falls about March 20 or 21, as the Sun crosses the celestial equator going north. In the Southern Hemisphere the equinox occurs on September 22 or 23, when the Sun moves south across the celestial equator.
Explanation:
Hope this helps ^^
Burning of aluminium powder in excess oxygen produces white aluminium oxide powder.Balance chemical equation.
Explain to me tq(*σ´∀`)σ
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First, write out the unbalanced equation.
Al(s) + O2(g) —> Al2O3(s)
Balance the oxygens first. What do you need to multiply by to get to a common multiple of 2 and 3 to balance the oxygens? The common multiple is 6, so multiply the O2 by 3 and the Al2O3 by 2.
Al(s) + 3O2(g) —> 2Al2O3(s)
Now balance your aluminum. You have 1 in the reactants and 4 in the products, so multiply the reactant by 4.
4Al(s) + 3O2(g) —> 2Al2O3(s)
Hope this makes sense!
Question 8 of 35
Which item rotates in a magnetic field as an electric motor produces kinetic
energy?
A. Permanent magnet
B. Loop of wire
C. Lightbulb
D. Battery
SUBMIT
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You can download answer here
tinyurl.com/wpazsebu
22) An embryo implants and begins to develop within which structure? *
4 points
Ovary
Oviduct
Cervix
Uterus
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Answer:
Subscribe to
Game Antics
What is the application of separating funnel
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Answer:
Used for liquid extractions
Explanation:
Answer:
the application of separating funnel is
to separate immiscible liquids from their solutes.
what is wind in more than 15 words?
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Answer:
Wind is Air in a natural motion, as that moving horizontally at any velocity along the earth's surface.
I went for a walk the other day. I went four blocks east, then seven blocks south, then one block west and finally
eight blocks north
a.What distance did I travel?
b. What's my displacement?
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Answer:
a) distance is 4+7+1+8=20 blocks
b) displacement is 10 blocks
Explanation:
find displacement: x and y
x axis displacement = 4-1 = 3 blocks
y axis displacement = -7+8= 1 block
displacement = the square root of 3^2 + 1^2
= 9+1 = 10 blocks.
You can find the angle of displacement with respect to the initial position using trig identities, if you wish.
Which of the following pairs of elements will combine to produce a covalent bond?
1-Hydrogen and chlorine
2-Magnesium and oxygen
3-Lithium and bromine
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Answer:
Hydrogen and Chlorine
ie HCL
The pairs of chemical elements that will combine to produce a covalent bond is: 1. Hydrogen and chlorine.
In Chemistry, the three (3) main types of chemical bonds include:
Ionic bonds: Lithium and bromineHydrogen bonds: Hydrogen and oxygen.Covalent bonds: Hydrogen and chlorine.A covalent bond can be defined as a type of bond that typically involves the sharing of electrons between the atoms of a chemical element.
For example, the type of bond that is produced (formed) between hydrogen atoms and a chlorine atom is a covalent bond.
The hydrogen atom shares it single electron with a chlorine atom that is having seven (7) valence electrons to produce an inert gas such as hydrochloric acid (HCL).
In conclusion, the pairs of chemical elements that will combine to produce a covalent bond is hydrogen and chlorine.
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Can someone plz help me with this one problem plz
(I’m marking brainliest)!!!!
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Answer:
the best answer is c because when there is more ppl there are less resources
True or False. Chemical changes only rearrange the elements that are
already present.
True or False. The reactants and the products of a chemical equation
always have the same number of atoms.
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Here's link to the answer:
tinyurl.com/wpazsebu
Given two balanced equations, each representing a reaction:
(1) Equation 1 shows 2.2 X 105 times more energy being absorbed. (\
2) Equation 2 shows 2.2 X 105 times more energy being absorbed.
(3) Equation 2 shows 2.2 X 105 times more energy being released.
(4) Equation 1 shows 2.2 X 105 times more energy being released.
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Answer:
There is a hack in forms that forms gives u the answer hold ctrl + u, and scrool to the bottom he read the part with the question and there will be an answer.
Mark as brainliest if im right good luck
Please answer thank you so much!
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choose the correct one
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Answer:
B. More reactant is added.
Explanation:
The question basically asks at which condition would the forward reaction be favoured.
The law of equilibrium states when a system at equilibrium is disturbed by, it would annul that change. In order to increase the forward reaction, more of the reactant should be added. In order to annul this change, the system would have to favour the reaction that deals with reducing the amount of reactant added.
The correct option is;
B. More reactant is added.
WILL GIVE BRAINLIEST
How much heat energy is absorbed when 94.0 g of water is heated from 5.0C to 29.5C? Show your work.
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Answer:
In order to be able to solve this problem, you will need to know the value of water's specific heat, which is listed as
c=4.18Jg∘C
Now, let's assume that you don't know the equation that allows you to plug in your values and find how much heat would be needed to heat that much water by that many degrees Celsius.
Take a look at the specific heat of water. As you know, a substance's specific heat tells you how much heat is needed in order to increase the temperature of 1 g of that substance by 1∘C.
In water's case, you need to provide 4.18 J of heat per gram of water to increase its temperature by 1∘C.
What if you wanted to increase the temperature of 1 g of water by 2∘C ?
This will account for increasing the temperature of the first gram of the sample by n∘C, of the the second gramby n∘C, of the third gram by n∘C, and so on until you reach m grams of water.
And there you have it. The equation that describes all this will thus be
q=m⋅c⋅ΔT , where
q - heat absorbed
m - the mass of the sample
c - the specific heat of the substance
ΔT - the change in temperature, defined as final temperature minus initial temperature
In your case, you will have
q=100.0g⋅4.18Jg∘C⋅(50.0−25.0)∘C
q=10,450 J
I need help with #4 please
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Answer:
1. Land 2. open 3. broken 4. Lava matter 5. Force of the plates
??? Ipc helppp pllzz
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-formation of a precipitate
-bubble formation
-color change
-temperature change
-odor formation
The only one that isn’t correct is change in state of matter. A change in a state of matter does not mean it’s a chemical change. For example, water boiling so it turns into gas is not a chemical change, and is a physical one. Also, water can freeze and turn into ice, which is also still a physical change. If something changes state of matter, it does not necessarily mean it’s a chemical change.
do all metallic oxides form alkaline solution???
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Answer:
Nope not all
Explanation:
As scientists says that not all give a solution.
hope that helps di
which of the following is not found in cytoplasm
A.water
B.carbohydrates
C.salt
D.vitamins
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Answer:
Carbohydrates
Explanation:
this is because cytoplasm is a substance that fills living cells.
What is the percent composition of oxygen in Iron(III) oxide? (Round to three sig figs)
Fe2O3 159.7g/mol
Fe =55.85 x 2 =111.7 g/mol
O = 16.00 x 3 = 48.00 g/mol
____% O
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30.1%
do not ask why it just is.
The diagram shows the molecular structure of butane. What is the chemical
formula for butane?
Butane
H
Н
Hн
н—с-с-с-с-Н
|| []
Н н н Н
А. 4C1ОН
В. С4Н10
С. 4CH10
D. HC4H
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Answer: B
Explanation: sorry if I'm too late but i just did this question and that was the right answer
two different people run a race the graphs track their distance vs. times during the race. Explain the difference between the two runners motions. use words like speed and acceleration.
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Answer:
Runner A is moving at a constant speed, therefore has a positive acceleration.
Runner B is moving at a constant speed, stopping, then speeding up again.
Explanation:
tell uses of nitrogen
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Answer:
Hello
Preservation of Food. Nitrogen gas is used to help with food preservation by preventing oxidative damage leading to food spoiling.Pharmaceuticals Industry.Electronics Manufacturing.Stainless Steel Manufacturing.Explanation:
thanks
what is a molecule??
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Answer:
molecule is a group of atoms bonded together representing the smallest fundamental unit of a chemical reaction
Mazlan menjelaskan lidah sebagai kulit yang mempunyai rasa.Adakah anda setuju dengan penjelasan lidah sebagai kulit?Jelaskan jawapan anda
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Answer:
tidak
Explanation:
kerana lidah bukan kulit,lidah ialah organ badan untuk merasa sesuatu,kulit kita hanya untuk mengeluarkan peluh bukan untuk merasa
1 point
have specific requirements that need to be met in order for an
entrepreneur to be considered.
O Loans
O Investments
O None of the other answers
O Grants
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How Do OBJECTS BEGIN MOVING?
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When a outside force acts upon it.
