Answers
Answer:
76 ml
0.076 L
Explanation:
hope that helps
Answer:
76 for the first one at least I think
Related Questions
Nonmetallic materials that are strong, brittle, resistant to heat and attack by chemicals, and are typically made from clay are known as:________
Answers
How many magnesium atoms are there in 1.25 mol of magnesium?
Answers
Answer:
1.25 x ( 6.02 × 10^23) = 7.525 × 10^23 atoms
Water can act as both an acid and a base in an ionization reaction to form (H) and OH ions.
What is this phenomenon called?
Answers
If you fill up a balloon with a small amount of air then set it in direct sunlight you'll see that the balloon expands this expansion is due to an increase in volume which results from...
Answers
Answer: An increase in temperature in the balloon.
Explanation: due to an increase in temperature it causes a rise in kinetic energy produced in the balloon thus creating more particle collision thus resulting in expansion in the balloon.
HOPE THIS HELPSS!!!!!!!!!!!
A student in a lab holds an iron nail over an open flame, and no reaction occurs. The nail is then filed, creating small pieces of iron shavings. These pieces burn brightly when placed over an open flame.
Which statement accurately identifies one of the changes that occurs as a physical or chemical change?
A. Filing the nail is a chemical change because the composition of the material does not change but the general appearance of the iron does change.
B. Burning the iron filings is a chemical change because the composition of the material does not change but the general appearance of the iron does change.
C. Filing the nail is a physical change because the composition of the material does not change but the general appearance of the iron does change.
D. Burning the iron filings is a physical change because the composition of the material does not change but the general appearance of the iron does change.
Answers
Answer:
A - Filing the nail is a physical change because the composition of the material does not change but the general appearance of the iron does change.
Explanation
yeah its just the right answer
The following statement accurately identifies one of the changes that occurs as a physical or chemical change; "Filing the nail is a physical change because the composition of the material does not change but the general appearance of the iron does change."
The most important aspect of chemical change is that the composition of a substance changes when the substance undergoes a chemical change. This is not the case when the substance undergoes a physical change.
After a physical change, the form, size or appearance may change but never in composition.
Hence the appropriate answer is; "Filing the nail is a physical change because the composition of the material does not change but the general appearance of the iron does change."
Learn more; https://brainly.com/question/6284546
Define the terms octet rule.
Answers
Answer:
The octet rule is a chemical rule of thumb that reflects the theory that main-group elements tend to bond in such a way that each atom has eight electrons in its valence shell, giving it the same electronic configuration as a noble gas.
A sealed reaction vessel initially contains 1.113×10-2 moles of water vapor and 1.490×10-2 moles of CO(g).
H20(g) +CO(g) <==> H2(g) + CO2(g)
After the above reaction has come to equilibrium, the vessel contains 8.326×10-3 moles of CO2(g).
What is the value of the equilibrium constant Kc of the reaction at the temperature of the vessel?
Answers
Answer:
Kc =[tex]\frac{[8.326x10-3]^{1} }{[1.113x10-2]^{1}[1.490x10-2]^{1} }[/tex]
Kc = 50.2059
Explanation:
1. Balance the equation
2. Use the Kc formula
Remember that pure substances, like H2 are not included on the Kc formula
The value of the equilibrium constant Kc of the reaction at the temperature of the vessel is 0.05.
Calculation,
The balanced chemical equation is given as,
[tex]2H_{2}O[/tex] + [tex]2CO[/tex] → [tex]2H_{2}[/tex] + [tex]2CO_{2}[/tex]
At t=0 1.113×[tex]10^{-2}[/tex] 1.490×[tex]10^{-2}[/tex] 0
At [tex]t=t_{eq}[/tex] 1.113×[tex]10^{-2}[/tex]-8.326×[tex]10^{-3}[/tex] 1.490×[tex]10^{-2}[/tex]-8.326×[tex]10^{-3}[/tex] 8.326×[tex]10^{-3}[/tex]
The number of moles of [tex]H_{2}O[/tex] at equilibrium = 1.113×[tex]10^{-2}[/tex]-8.326×[tex]10^{-3}[/tex]
The number of moles of [tex]CO[/tex] at equilibrium = 1.490×[tex]10^{-2}[/tex]-8.326×[tex]10^{-3}[/tex]
The number of moles of [tex]CO_{2}[/tex] at equilibrium = 8.326×[tex]10^{-3}[/tex]
What is equilibrium constant?Equilibrium constant is calculated bt ratio of product of concentration of reactant by product.
K = [tex][H_{2}O]^{2}[/tex]×[tex][CO]^{2}[/tex]/[tex][CO_{2}]^{2}[/tex]
K =( 1.113×[tex]10^{-2}[/tex]-8.326×[tex]10^{-3}[/tex] )∧2× (1.490×[tex]10^{-2}[/tex]-8.326×[tex]10^{-3}[/tex])∧2/(8.326×[tex]10^{-3}[/tex])∧2
K = 0.049 ≈ 0.05
To learn more about equilibrium constant,
https://brainly.com/question/11420477
#SPJ2
Which formula can be used to calculate the molar mass of hydrogen peroxide (H2O2)? (5 points)
Select one:
a.molar mass of H + molar mass of O
b.2 x molar mass of H + molar mass of O
c.molar mass of H + 2 x molar mass of O Incorrect
d.2 x molar mass of H + 2 x molar mass of O
Answers
answer: option d (2×molar mass of H +2×molar mass of O
Water is placed into a sealed jar and has a mass of 22.0 grams. The jar is placed in the freezer and the water turns to ice. The jar of ice is measured. The mass should be:
a. Slightly less than 22.0 grams
b. Exactly 22.0 grams
c. Slightly more than 22.0 grams
Answers
exactly 22.0 grams
because freezing is a physical change not a chemicl change..so nothing is taken away or added
ANSWER;
exactly 22.0 grams
because freezing is a physical change not a chemicl change..so nothing is taken away or added
In the coordination compound [Pt(NH 3) 2Cl 2], the coordination number and oxidation number of the central atom are ________ and ________, respectively.
Answers
coordination number is 4 because there are 4 things that is attached/coordinated to the central atom Pt (2 NH3 molecule, 2 Cl- ion)
oxidation number is +2
Question 4 (1 point)
If you read a graph and saw the values of the motorcycle decreasing over time, this
graph would show a
positive correlation
positive answer
negative correlation
negative answer
Answers
From the options listed The graph would show a negative correlation ( C )
Correlation is used to express the relationship between two or more variables. correlation can be measured into four ( 4 ) in statistics :
Pearson correlationKendall rank correlationSpearman correlationPoint-Biserial correlationBut Generally correlation is categorized as either a positive or a negative correlation.
In a negative correlation the variables are inversely proportional to each other while in a positive correlation the variables are directly proportional to each other.
Note : an inverse proportion simply means that an increase in value of one variable = decrease in value of the other and vice versa
hence the graph would show a negative correlation given that the the values of the motorcycle decreases with increase in time.
learn more : https://brainly.com/question/13879362
1. How many pounds does 2.00 kg weigh?
Answers
I think is 4.41 the answer of your question
Answer: 4.4lb
Explanation:
A radioactive sample is placed in a closed container. Two days later only one-quarter of the sample is still radioactive. What is the half-life of this sample?
Answers
Answer:
2
Explanation:
The sample has halved twice.
1/2 of 1/2 is 1/4, and 1/2 of 1 is 1/2.
50 points!!!
Please help me
Answers
31. compound
32. element
33. compound
34. compound
34. mixture of elements and compounds
Identify whether the solubility of Ag_2CrO_4 will increase or decrease by adding the following agents.
a. Na2CrO4
b. HCl
c. NH3
Answers
b) with addition of HCl silver chromate solubility will increase as silver chromate reacts with HCl to produce silver chloride precipitate (white). silver chromate is red-brown color hence it can be easily distinguished
c) with NH3 silver chromate will form diamine complex and results in increased solubility of silver chromate
equilibrium between two isomers a and b (a and b have the same mol. wt) is attained when there is 5% by weight A and by difference, 95% by weight of B. What is the equilibrium constant
Answers
The equili constant assuming reaction is from isomer A to isomer B; 19
i.e. A ⇄ B = 19
Given data :
% wt of A = 5
% wt of B = 95
assume the mass of mixture = 100 g
wt of A = 5% of 100 = 5 g
wt of B = 95% of 100 = 95 g
∴ mole of A = 5/M mol, mole of B = 95/M mol ( where M = molar mass )
expressing the equilibrium constant
A ⇄ B
equilibrium constant = [tex]\frac{[B]}{[A]}[/tex] = [tex]\frac{ (95/M) /V}{(5/M)/V}[/tex] where V = volume
∴ Equilibrium constant = 19 assuming process is from A to B
hence the equilibrium constant = 19 assuming reaction process is from A to B
learn more : https://brainly.com/question/3159758
The sun is ____star
Answers
The sun is a star.
If you were talking about that
the sun is a Star...............
Metric system is also known as the (use the amount of letters in 16 across) WILL MARK BRAINLIEST:))
Answers
Answer:
Si System
hope this helped!
1.
2 Explain the meaning of each of the following
terms. In your answer include an example to help
with your explanation.
a Expansion.
d Sublimation.
b Contraction.
e Diffusion.
c Physical change. f Random motion.
a Nar
b Na
c Na
sol
d De
so
Answers
Answer:
a. Expansion: the spatial dilation of a material that occurs upon changes in its composition. (an increase in number or amount to become larger in size.)
E.g- in a thermometer, when it gets hotter, the liquid inside them expands and rises up the tube.
b. Sublimation: the process in which a solid changes directly into a liquid.
E.g- dry ice, solid iodine and ammonium salts.
when the above solids are heated, only particles which are found on the surface of the solid have enough energy to break all forces of attraction and form a gas.
c. Contraction: it is the opposite of expansion. when a liquid is cooled the particles slow down and contract.
E.g- when a thermometer is taken out of your mouth, it contracts and the liquid inside falls back to the bottom.
f. Random Motion: motion in which the particle moves in a zig-zag manner and not in a straight line. The kinetic particle theory states that matter is made up of particles which are in constant random motion,
Explanation:
how to calculate the density of a substance
Answers
Answer:
DENSITY=mass/volume
Explanation:
Answer:Density, mass of a unit volume of a material substance. The formula for density is d = M/V, where d is density, M is mass, and V is volume. Density is commonly expressed in units of grams per cubic centimetre.
Explanation:
Answer!! 50 points
Which statement describes the properties of lanthanoids and actinoids?(1 point)
A. They are malleable and lustrous, and they tend to conduct both electricity and thermal energy.
B. They are brittle and dull, and they tend to conduct both electricity and thermal energy.
C. They are brittle and dull, and they tend to be poor conductors of both electricity and thermal energy.
D. They are malleable and lustrous, and they tend to be poor conductors of both electricity and thermal energy.
Answers
Answer:
a i j took test and c was wrong
Explanation:
Answer:
the answer is a. c is wrong
Explanation:
In all cases heat flows from a hotter object to a colder object (true/false)
the correct answer will be followed by me and also be marked as the brainliest!
P.S. hv a great Sunday!
Answers
Answer
Yes, it's true
In any case or all cases, heat always flow from the hotter object to the colder object
Answer:
In all cases heat flows from a hotter object to a colder object (true/false)
Explanation:
true
Who first proposed the idea of the atom
Answers
Answer:
it's John Dalton
Explanation:
mark me as brainliest ❤️
When 0.60 mol NH 3 is decomposed in a 1 Liter flask at 850 K, the equilibrium concentration of NH3 is measured as 0.12 M. Given that ammonia decomposes according to the reaction
2 NH3(g) ⇌ N2(g) + 3 H2(g),
what is Kc for the reaction?
a. 0.16
b. 12.00
c. 1.44
d. 6.22
e. 0.75
Answers
Answer:
in a 1 Liter flask at 850 K, the equilibrium concentration of NH3 is measured as 0.12 M. Given that ammonia decomposes according to the reaction
2 NH3(g) ⇌ N2(g) + 3 H2(g),
what is Kc for the reaction?
a. 0.16
b. 12.00
c. 1.44
d. 6.22
e. 0.75
The response is 12.00 (b). Using the equation Kc = [N2][H2]3/[NH3]2, we can find the equilibrium constant Kc for the reaction 2 NH3(g) N2(g) + 3 H2(g).
What is the equilibrium concentration ?In this instance, the capacity of the flask is 1 litre, and the equilibrium concentration of NH3 is 0.12 M. Therefore, using the reaction's stoichiometry, it is possible to determine the equilibrium concentrations of N2 and H2.
Since 2 moles of NH3 break down into 1 mole of N2 and 3 moles of H2, the equilibrium concentrations of N2 and H2 are 0.06 M and 0.18 M, respectively. As a result, the equilibrium constant Kc = [N2][H2]3/[NH3]2 = (0.06)(0.18)3/0.122 = 12.00 may be computed.
Therefore, b. 12.00 is the right response. You should be aware that the equilibrium constant Kc is a value that is temperature-dependent and is only applicable at the specified temperature. As a result, Kc will have a varied value depending on the temperature. The temperature in this instance is 850 K, and the Kc value is 12.00.
Learn more about equilibrium at:
https://brainly.com/question/30694482
#SPJ2
What is 47.35 dL= mL?
Answers
Answer:
4.735 litres
Explanation:
10 dL = 1 litre
47.35 dL = 47.35/10 = 4.735 litres
PLS HELP Quick!!!!!!!!!
Answers
Answer:
Bailee is incorrect. The mass of objects stay the same but the weight will change.
Explanation:
Mass is how much space something takes up, so that wouldn't change on the moon. The weight however would change because the gravitational pull on the earth is different from that on the moon.
I hope this helps!
Bailee explained that when traveling to the moon. The statement of Bailee is incorrect. The mass of the objects stays the same, but the weight will change. The correct option is B.
What is gravity?Gravity is a force that pulls all objects towards itself. It is present on the earth and in the galaxy. Gravity is the cause of all planets, and the sun and the moon stay in their own places.
The weight of items on the moon is equal to their weight on Earth, according to Bailee, thus he needs only bring a small amount of luggage. The mass is the quantity of matter. The mass never changes, only the weight changes of an object when they are on different planets.
Thus, the correct option is B. The mass of the objects stays the same, but the weight will change.
To learn more about gravity, refer to the link:
https://brainly.com/question/13040516
#SPJ2
Which of the following
best describes the cell
wall of a plant cell?
A. sturdy
B. unstable
C. flimsy
D. weak
Answers
Answer:
A. Sturdy
Explanation:
Unlike every other answer, the cell wall is the part of the cell that acts as a strong barrier of the cell. In this case, it is sturdy.
Into what genre does a novel fit that
takes place in a made-up world and
has events that couldn't really
happen?
A. non-fiction
B. mystery
C. fantasy
Answers
Answer:
A. non fiction or a ajami to download
what is seed reproduction
Answers
Answer:
A seed is formed when fertilised ovule divides by mitosis. ... The ovary of the flower develops into the fruit while ovules develop into seeds. The formation of seed completes the process of reproduction in plants. Within the seed, the growing embryo develops and matures.
I hopes it helps you.All of the following are examples of simple tools except:
A.magnifying glass
B.space telescope
C.pulley
D.lever
Answers
Answer:
space telescope I assume
Explanation:
all other tools can be made and used very easily but a telescope took years and years to invent