Answer:
The correct option is C.
In a tightly closed container in a dry and well-ventilated place
Explanation:
Hydrogen peroxide should be store in a tight closed container and ventilated area because it is an oxidizing agent and it's has oxidizing characteristics. If to is exposed or the bottle lid is broken and exposed it can react and liberate oxygen and heat. It can react with the air and chemical it is exposed with. This will make it to be less effective and there will be a change in it's composition.
describe the difference beetween an extensive and intesive property
Extensive properties, such as mass and volume, depend on the amount of matter being measured. Intensive properties, such as density and color, do not depend on the amount of the substance present. Physical properties can be measured without changing a substance's chemical identity.
Which statement correctly compares and contraWhich statement correctly compares and contrasts the information represented by the chemical formula and model of a compound?
Both show how the atoms in a compound are connected.
Models show how the atoms in a compound are connected.
Chemical formulas show how the atoms in a compound are connected.sts the information represented by the chemical formula and model of a compound?
Answer:
the answer is b :)
Explanation:
did the assignment <3
What happens when an electron absorbs energy?
A. The electron moves from a lower energy orbital to a higher energy orbital.
B. The electron falls into the nucleus.
C. The electron moves from a higher energy orbital to a lower energy orbital.
D. The electron loses its charge.
Answer:
its either A or C
Explanation:
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Cellular respiration is? (Single choice.)
A. a chemical reaction that converts energy from food molecules by way of oxygen into a usable energy called ATP.
B. a chemical reaction that converts carbon dioxide and water into glucose and oxygen.
C. a chemical reaction that converts that occurs only in animals.
D. a chemical reaction that occurs only in plants.
Tim and Jose are moving furniture. Tim pushes a 150kg sofa with 300N force. As a result, Sofa’s acceleration was _____ according to Newton’s Second Law of motion. [F=ma]
Answer: 160
Explanation:
Answer:150/ms behfhefjioweufioefwebveour
Which chemical reaction is correctly balanced? *
a. CH4 +2O2 → CO2 +2H2O
b. 2CH4 +2O2 → CO2 +2H2O
c. CH4 +O2 → CO2 +H2O
d. None of the above
Which chemical reaction is correctly balanced? *
a. CH4 +2O2 → CO2 +2H2O
b. 2CH4 +2O2 → CO2 +2H2O
c. CH4 +O2 → CO2 +H2O
d. None of the above
Explanation:
d none of the above
Answer:
The answer is a. CH4 + 2O2 --- CO2 + 2H2O
Explanation:
A balanced chemical reaction must have the same number of each type of atom on both sides according to the law of conservation of mass:
1 carbon 4 hydrogen + 4 oxygen ----- 1 carbon 2 oxygen + 4 hydrogen
2 oxygen =
1 carbon 4 hydrogen 4 oxygen ---- 1 carbon 4 hydrogen 4 oxygen
Since each type of atom has the same amount on both sides, the chemical formula is balanced.
Water's heat of fusion is 80. cal/g , its specific heat is 1.0calg⋅∘C, and its heat of vaporization is 540 cal/g .
A canister is filled with 350 g of ice and 100. g of liquid water, both at 0 ∘C . The canister is placed in an oven until all the H2O has boiled off and the canister is empty. How much energy in calories was absorbed?
Answer:
Q1=(330g)*(80cal/g)=26,400cal
Q2=(430cal)*(1cal/(g-c)*(100c=43,000cal
Q3=(430g)*(540 cal/g)= 232,200cal
Total heated absorbed is
Q1+Q2+Q3= 301,600 or 301.6 kcalExplanation:
# I hope it's help
can aniline be nitrated directly?
Answer:
Yes.
Explanation:
Hello!
In this according to the attached file, we infer that the aniline can be nitrated by the addition of nitric acid and in presence of sulfuric acid that provides an acidic media. It leads to the formation of o-nitroaniline, m-nitroaniline and p-nitroaniline whereas the major products are the last two due to the steric hindrance.
Best regards!
how many moles are there in 1.2044x 1024 atoms of hydrogen
Answer: 2 moles as atoms, but would normally be 1 mole H2
Explanation:
1.2024x10^24/6.02214076 = 2 moles
but 1 mole H2
For ionic bonding, the net potential energy between two adjacent ions, EN, may be represented by the sum of Equations 2.8 and 2.9 from the text; that is, The binding energy 0 represents that point where EN is minimized. Derive an expression for the bonding energy in terms of the parameters A, B, and n. (Hint: first differentiate and derive an expression for r0, the equilibrium interionic spacing, in terms of A, B, and n. r
Answer:
- [ A/[A/nB]^1/1-n + B/ [A/nB]^n/1-n].
Explanation:
The mathematical representation for the net potential energy as described in the Question above is given below as;
En = -A/r + B/r^n.
Therefore, let's call the equation above equation (1). Hence, there is the need to differentiate equation (1) above wrt r.
(NB: wrt = with respect to)
Thus, [dEn/ dr] = 0. -------------------------(2).
d [ - A/r + B/r^n]/ dr = 0. -------------------(3).
A/r^2 - nB/r^n+1 = 0 ------------------------(4).
r^2/r^n+1 = A/nB ----------------------------(5).
r^1-n = A/nB -----------------------------------(6).
(1 - n )ln r= ln A/nB ------------------------(7)
ln r = 1/1 - n ln [A/nB] ---------------------(8).
r = e^ln(A/nB)^1/1-n ----------------------(9).
r = [A/nB]^1/1-n. ---------------------------(10).
Thus, put the value in (10) above that is r = [A/nB]^1/1-n into equation (1).
Hence, the bonding energy = - [ A/[A/nB]^1/1-n + B/ [A/nB]^n/1-n].
Is elemental copper a pure substance
Answer:
yes
Explanation:
copper is a pure substance in any form
1 Srcl (aq) + 1 H,60,(aq) → 2 HCl(aq) + 1 Srso (s)
What is the mass of strontium chloride that reacts with 300.0 g of sulfuric
acid?
Answer:
Mass = 245.72 g
Explanation:
Given data:
Mass of SrCl₂ react = ?
Mass of H₂SO₄ = 300.0 g
Solution:
SrCl₂ + 2H₂SO₄ → 2HCl + Sr(HSO₄)₂
Number of moles of H₂SO₄:
Number of moles = mass/molar mass
Number of moles = 300.0 g/ 98.079 g/mol
Number of moles = 3.1 mol
Now we will compare the moles of SrCl₂ and H₂SO₄.
H₂SO₄ : SrCl₂
2 : 1
3.1 : 1/2×3.1 = 1.55 mol
Mass of SrCl₂:
Mass = number of moles × molar mass
Mass = 1.55 mol × 158.53 g/mol
Mass = 245.72 g
Convert 1020 mm Hg to atm
Answer:
1.34
Explanation:
Iron metal reacts with elemental oxygen to form rust according to the unbalanced reaction, Fe(s) + O2(g) → Fe2O3(s),. Which of the following statemens does not describe this reaction?
a
This reaction is a synthesis reaction.
b
This reaction is a single replacement reaction.
c
This reaction is a combustion reaction.
d
This reaction is a redox reaction.
Answer:
ok
Explanation:
the answer is b
What is the formula for nickel(III) carbide?
Answer:
Ni3C
Explanation:
Name CH3CH2CH2CH=CHCH3
Answer:
Hexene
hope it helps.....
How many moles are present in 281 grams of arsenic
If the four components were ranked from smallest to largest, what would the order be?
*Science*
A: planet, solar system, galaxy, universe
B: planet, galaxy, solar system, universe
C: universe, galaxy, solar system, planet
D: solar system, galaxy, planet, universe
help me :)
2:58
This isn't college! Its science and I'm keeping my grade private so.
Answer:
A
Explanation:
planet, solar system, galaxy, universe
how are point source and nonpoint source pollution harmful when it rains
Answer:
Nonpoint source pollution is difficult to control because it comes from many different sources and locations. Most nonpoint source pollution occurs as a result of runoff. When rain or melted snow moves over and through the ground, the water absorbs and assimilates any pollutants it comes into contact with.
How many atoms of oxygen are in one molecule of water (H,)?
o one
O two
O four
o three
2 atoms
..................
Which layers of Earth are mostly made of solid material?
A) crust and inner core
B) crust and mantle
C) mantle and outer core
D) inner core and outer core
Explanation:
D. inner core and outer core
A 0.450 g sample of solid lead(II) nitrate is added to 250 mL of 0.250 M sodium iodide solution. Assume no change in volume of the solution. The chemical reaction that takes place is represented by the following equation. Pb(NO3)2(s) + NaI(aq) → PbI2(s) + NaNO3(aq) How many moles of PbI2 can be produced?/Identify the limiting reactant/If the actual yield was 0.550 g of PbI2, what is the percent yield?
Pb(NO₃)₂ ⇒limiting reactant
moles PbI₂ = 1.36 x 10⁻³
% yield = 87.72%
Further explanationGiven
Reaction(unbalanced)
Pb(NO₃)₂(s) + NaI(aq) → PbI₂(s) + NaNO₃(aq)
Required
moles of PbI₂Limiting reactant% yieldSolution
Balanced equation :
Pb(NO₃)₂(s) + 2NaI(aq) → PbI₂(s) + 2NaNO₃(aq)
mol Pb(NO₃)₂ :
= 0.45 : 331 g/mol
= 1.36 x 10⁻³
mol NaI :
= 250 ml x 0.25 M
= 0.0625
Limiting reactant (mol : coefficient)
Pb(NO₃)₂ : 1.36 x 10⁻³ : 1 = 1.36 x 10⁻³
NaI : 0.0625 : 2 = 0.03125
Pb(NO₃)₂ ⇒limiting reactant(smaller ratio)
moles PbI₂ = moles Pb(NO₃)₂ = 1.36 x 10⁻³(mol ratio 1 : 1)
Mass of PbI₂ :
= mol x MW
= 1.36 x 10⁻³ x 461,01 g/mol
= 0.627 g
% yield = 0.55/0.627 x 100% = 87.72%
HELP ME PLZZZZZZZZZZZZZZZZZZZ
Air pressure decreases with increasing altitude. In other words the higher up in the atmosphere you go, the thinner the air is.
True
False
Answer:
True
hope this helps
Explanation:
A 558 mg of a mixture of fluorene and benzoic acid was weighed out and subjected to an extraction and recrystallization. After this purification was completed the product crystals were dried and analyzed. The purification procedure produced 185 mg of fluorene and 144 mg of benzoic acid. Calculate the percent composition of this mixture.
Answer:
See explanation
Explanation:
Mass of mixture of fluorene and benzoic acid = 558 mg
Mass of pure fluorene after purification = 185 mg of fluorene
Mass of pure benzoic acid after purification = 144 mg of benzoic acid
Percentage of fluorene int he mixture = 185mg/558mg * 100 = 33.15 %
Percentage of benzoic acid in the mixture = 144mg/558mg * 100 = 25.81 %
Percentage of impurities = 100% - [33.15 + 25.81]
Percentage of impurities = 100 - 58.96
Percentage of impurities = 41.04 %
Please help me with these 3 questions with will be giving out brainiest
Answer: All of them are true
Which chemical name and formula is a matching set?
Answer:
Chemical compound
Explanation:
Which statement best describes most tundra animals?
A. slender and short, so they can move quickly
B. hardly any fur or feathers because they are warm-blooded
C. stocky bodies covered with thick fur or feathers
D. most of their time is spent underground, so they are insulated
Answer:
C. stocky bodies covered with thick fur or feathers
Explanation:
Animals in the tundra generally have stocky bodies covered with thick fur or feathers.
A tundra is a very cold biome. In fact, it is the coldest of all the biomes found on the earth. This region is found in the Arctic and other parts of the world. It is treeless, very cold and has little to no precipitation all year round.
Animals here must be highly adapted to the cold all year round. They must possess a stocky body with added layer of fats so as to insulate them from losing heat. Their thick feathers and furs serves are great advantage for them also in conserving bodily heat. Examples of animals here are bears, foxes etcAn ionic compound forms between atoms when they _________ or ________ electrons.
Answer:
lose or gain electrons
Explanation:
Worth 100 points if able to help, please! (show work if possible)
Answer:The answer would be 2 sorry i cant show the work right now
Explanation:
Answer:
2
Explanation:
A(n) is made up of all the species that live in the same
ecosystem at the same time.
Answer:
Is called a population
Explanation:
Answer:
All the organisms of the same species that live in the same place at the same time are a population. Populations ofspecies that live in the same place at thesame time together make up a community. All the populations and the nonliving components in an environment that interact with each other form anecosystem.
