ok ther only one solution n2 is ÷ 2h×2 is ok but the problem is that the standard form of the square is not yet
The dimensions of a box are measured to be 18.4 inches by 17.92 inches by 26 inches. The volume of the box can be found by multiplying these three dimensions. What is the volume of the box expressed to the correct number of significant figures?
A.
8,600 in3
B.
8,573 in3
C.
8,572.9 in3
D.
8,570 in3
Answer:
Explanation:The volume of the box is 8.6 × 10³ in².
V = lwh = 26 in × 18.4 in × 17.92 in = 8.6 × 10³ in²
Note: The answer can have only two significant figures because that is all you gave for the length of the box.
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The second law of thermodynamics states that all energy transformations result in an increase in entropy (disorder). If so, how does photosynthesis, which is an energy transformation, create order rather than disorder
Answer: Through photosynthesis carbon dioxide and water is converted to glucose which is more ordered.
Explanation:
Besides that initial consideration there is solar energy being added to the reaction which might be worth noting.
More important to note is that organic molecules/compounds such as glucose are higher in order compared to inorganic molecules/compounds such as water.
Write the rate law for the following reaction given that the order of A = 2, B = 1, and C = 0. A + B + C ———> D + E
If the concentration of C is doubled, what will happen to the rate of the reaction?
Answer:
The rate law is:
[tex]\displaystyle \text{Rate} & = k[A]^2[B][/tex]
Doubling the concentration of C will have no effect on the rate of the reaction.
Explanation:
We want to write the rate law for the reaction:
[tex]\displaystyle A + B + C \longrightarrow D + E[/tex]
Where the order of A, B, and C are 2, 1, and 0, respectively.
The rate law will have the form:
[tex]\displaystyle \text{Rate} = k [A]^m[B]^n[C]^p[/tex]
Where m, n, and p are their respective order of reactions.
Hence, the rate law is:
[tex]\displaystyle \begin{aligned} \text{Rate} & = k[A]^2[B][C]^0\\ \\ & = k[A]^2[B] \end{aligned}[/tex]
Because the order of reaction to C is 0, changing its concentration will have no effect on the rate law.
How force and motion alone with energy works?
Help please I’ll give 5 stars
What type of bonds do halogens form in binary compounds?
A. Ionic
B. Covalent
C. Metallic
which of the following happen when you heat a solid
Answer:
Is the solid an explosive?
Explanation:
..because then it would blow up.
Everything else would melt and phase transfer would occur from a solid to liquid.
8. Choose the best answer.
The measurement of enthalpy changes caused by chemical reactions, changes of state, or the formation of a solution is called ______.
options:
organics
thermochemistry
calorimetry
analytics
themodynamics
Answer:
the answer is themodynamics
I will mark you as brainliest if you're correct
Caesium is in period 6 group 1. Would you expect caesium to have a higher or lower melting point than rubidium? give a reason for your answer
Answer:
A higher melting point than rubidium
Explanation:
Since Caesium has very strong bond btwn atoms hence requires high energy to break causing it to have a high melting point than rubidium
Answer:
Caesium would have a lower than Rubidium.
Explanation:
The reason is the periodic order.
Suppose we redefine the standard state as P= 2 bar . Find the new standard ΔfG∘ values of the following substances.
a) HCl(g)
b) N2O(g)
c) H(g)
We have that the new values of the following substances HCl(g), N2O(g), H(g) is that the remain the same as
dG=dH-TdS remains the same.
Standard ΔfG∘ values of substances.Question Parameters:
s P= 2 bar
HCl(g)
N2O(g)
H(g)
Generally the equation for the Change in Heat energy is mathematically given as
dG=dH-TdS
Where
dH=CpdT
Therefore, With no change in entalpy dH only changes when there is a change in dT
dS=CpInT
With dS independent of pressure S is constant
Hence, dG=dH-TdS remains the same
For more information on Pressure visit
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Look at the following elements and tell what information you can deduce from the given data.
1. Calcium 20 = Group 2 & Period 4
2. Oxygen = Group 6A & Period 2
Looking at the molecule images above, could the molecules of air get into the blood from the lungs? Why or why not? (Select ALL that apply)
a. Group of answer choices
b. The gas maolecules are really small, even smaller than glucose
c. Because the air molecules are so small, they can pass through the lung membrane into the blood like glucose did with the small intestine.
d. The air molecules can not pass through the membrane of the lungs because they are too large.
e. The air molecules are much larger than glucose molecules.
Answer:
b and d
Explanation:
why did the US Air Force study water vapor and Co2 in the atmosphere ? what did they learn?
Answer:
The U.S. Air Force needed to understand the atmosphere for communications and to design heat-seeking missiles. At certain wavelengths carbon dioxide and water vapor block radiation. So the new missiles couldn't see very far if they used a wavelength that CO2 absorbs.
Explanation:
Analyze the role coefficients in a chemical reaction play in stoichiometry
Answer:
This is known as the coefficient factor
Explanation:The balanced equation makes it possible to convert information about one reactant or product to quantitative data about another element.
What is the percent composition of each element in CaCO 3 ? ( Mass of Element divided by mass of Compound) x 100
Answer:
molar mass of CaCO3=40+12+3(16)
=100 gmol-1
Ca percent composition=40/100*100%
=40%
C percent composition=12/100*100%
=12%
0 percent composition=48/100*100%
=48%
Answer:
Since we're sticking with theoretical values instead of experimental, Percent Composition would be (Molar Mass of the element) / (Molar mass of compound) x 100%
Molar mass of Calcium: 40g/mol
Molar mass of Carbon: 12g/mol
Molar mass of Oxygen: 16g/mol
Molar mass of CaCO3 (Calcium Carbonate) = (40) + (12) + (16)*3 = 100g/mol
Percentage composition of Calcium = [tex]\frac{40}{100} \ * \ 100 =[/tex] 40% of Calcium
Percentage composition of Carbon = [tex]\frac{12}{100} \ * \ 100 =[/tex] 12% of Carbon
(For the next one, there are 3 oxygen, so it'd be 16x3 = 48g/mol)
Percentage composition of Oxygen = [tex]\frac{48}{100} \ * \ 100 =[/tex] 48% of Oxygen
How is nitrite related to nitrate?
Answer:
here
Explanation:
Nitrates and nitrites are interrelated by oxidation reduction; nitrite is the breakdown product of nitrate. Many experts believe that nitrates are relatively harmless until they break down into nitrites.
What are properties of a base
Answer:
base taste bitterbase feel so spy slippery to touchbase turn wet red litmus paper blueexplain how matter and energy cycle through the Chaparral
Answer:
the scrubby plants in the chaparral biome fix CO2 from the atmosphere through photosynthesis and store carbon as starch. The energy from these carbohydrates is passed on to animals and insects that consume the plants. These primary consumers will pass on the carbon’s energy to other animals that prey on them. When plants or animals die and decompose, the carbon in their bodies returns to the earth. Fossil fuels, which are made from ancient decomposed matter, release carbon back into the atmosphere as CO2 when they are burned
Cellular Respiration occures in the cell's ___________?
Question 4 options:
chloroplast
cell wall
mitochondria
Answer:
the answer is mitochondria
Explanation:
its mitochondria unless its anaerobic respiration then it takes place in the cells cytoplasm
How Can I prepare Conc. of Ethanol in water 25% …?
Answer:
25 percent solution by mass of ethanol means that 100 gram of solution contains 25 gram of solute i.e-ethanol. Now,as the density of the solution is 1 g/ml so 100 g of the solution has a volume of 100 ml. So,we have 25 gram of ethanol in 100 ml of the solution. So we have 250 g of ethanol in 1 litre of solution.
Explanation:
How do you find the protons , neurons and electrons of an element ?
Answer:
For any element,
Atomic Number (Z) = The number of protons (P⁺) = The number of electrons (e⁻)
Hence,
Z = P⁺ = e⁻
For Neutron,
Mass number (A) – Atomic Number (Z)
N = A – Z
For Examples :-Oxygen atom (O)Atomic Number = 8Proton = 8Electron = 8Mass Number = 16Neutron = 16 – 8 = 8
-TheUnknownScientist 72
A student investigates the motion of a toy vehicle. The student graphs 40 seconds of data from the investigation.
Motion of a Toy Vehicle. Distance, meters. Time, seconds.
Which statement best describes the motion of the toy vehicle during the first 30 seconds of the investigation?
The vehicle was traveling at a constant speed.
The vehicle was accelerating at a constant rate.
The speed of the vehicle was increasing.
The acceleration of the vehicle was increasing.
Although we do not have the graph needed to answer this question, we can confirm that if the toy were to be accelerating, one should see this on the graph as a curved line.
How can we know if the toy was accelerating?When graphing motion in terms of distance over time, we can use the shape of the line in the graph to determine if the speed is constant or if there is an acceleration present. If the line is straight, the speed is constant, but if there is a curve, there will be acceleration.
Therefore, we can confirm that if the toy were to be accelerating, one should see this on the graph as a curved line.
To learn more about motion visit:
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Which sub atomic particle always determines the elemental identity of an atom
Answer:
The proton determines the identity of an element.
What is the coefficient for lead (II) carbonate
If you are given the mass of a reactant in grams and want to calculate the mass of a product in grams, what are the three steps of the calculation you must perform?
The major 3 steps in determining the mass of a product from a given mass of a reactant would be to find the balanced equation of the reaction, determine the mole ratio of the reactant to the product, and then use the equivalent mole of the product from the reactant to find the desired variable.
Finding the mass of productsWith a given mass of a reactant, the mass of a product from a reaction can be determined in 3 major steps:
Get the balanced equation of the reaction and determine the mole ratio of the reactant to the product.Find the number of mole of the reactant from the given massFind the equivalent number of mole of the product using the mole ratioFrom there, the equivalent number of moles of the product can be used to find the mass of the product by multiplying with the molar mass of the product.
More on stoichiometric calculations can be found here: https://brainly.com/question/8062886
What NEVER happens while a mixture is being separated?
Answer:
Componets of Homogenous mixture cannot be seperated by using physical methods
Explanation:
hope it helps,God bless
What is the molar mass of AICI3?
Answer:
133.34 g/mol
Explanation:
cf2br2 structural formula
Answer:
Here, this may help you:
https://brainly.in/question/28298343
Explanation:
Use the electron configurations and the periodic table to answer the question
Answer:
Nitrogen
Explanation:
1 arrow = 1 electron
there are 7 arrows = 7 electrons
Nitrogen has 7 electrons or 7 protons