Answer:
If the volume of a gas increased from 2 to 6 L while the temperature was held constant, the pressure of the gas decreased by a factor of 3.
Explanation:
Boyle's law that says "The volume occupied by a given gaseous mass at constant temperature is inversely proportional to pressure." This means that if the pressure increases, the volume decreases, while if the pressure decreases, the volume increases.
Boyle's law is expressed mathematically as:
Pressure * Volume = constant
or
P * V = k
To obtain the proportionality factor k you must make the quotient:
[tex]k=\frac{V2}{V1} =\frac{6 L}{2 L}[/tex]
k= 3
This means that if the volume of a gas increased from 2 to 6 L while the temperature was held constant, the pressure of the gas decreased by a factor of 3.
How much drug should be used in preparing 50mL of solution such that 5 mL diluted 500mL will yield 1:1000 solution?
Stock solutions contain a standardized concentration of the solute in a solution. To prepare 50 mL of solution with a ratio of 1:1000 solution, 5 gms of the drug will be required.
What is dilution?Dilution is the property of the solution with a less amount of solute concentration than the stock solution. A dilute solution is prepared by the addition of more solvent.
The addition of the solvent in a solution decreases the molar concentration which leads to dilution.
The ratio of 1:1000 means that 1 gm of the drug is present in 1000 mL (1L) of solution.
1000 mL = 1 gm × 500 mL × X gm
Here, the X represents the 0.5 gm of drug dissolved in 500 mL.
The amount of drug used is calculated as,
5 mL ÷ 50 ml = 0.5 g ÷ X g
X = 0.5 × 50 ÷ 5
= 5 gm
Therefore, 5 gm of the drug is required to prepare 50 mL of solution.
Learn more about dilution here:
https://brainly.com/question/27839179
#SPJ2
We can draw three inequivalent Lewis structures for the sulfite ion , SO32- . The concepts of formal charge and electronegativity can help us choose the structure that is the best representation. 1. Assign formal charges to the elements in each of the structures below. Note: Count oxygen atoms starting from the left for each structure. A B C Formal Charge S O1 O2 O3 2. The best Lewis structure for SO32- is
Answer:
1. The Lewis structure for SO32- is structure B.
Note: See attachment for complete question and for formal charges of the atoms in each structure.
Explanation:
The formal charge of an atom in a molecule is the assumed charge the atom would have if the electrons in the bonds were evenly distributed between the atoms.
Formal charge can be calculated as follows:
Formal charge = number of valence electrons - ( number of non-bonding electrons + ½ bonding electrons)
Formal charges are used to determine the best possible Lewis structure of a molecule or ion. The following rules are applied:
1. A structure in which all formal charges are zero is preferable to one in which some formal charges are not zero.
2. If non-zero formal charges must exist in the structure , the arrangement with the smallest non-zero formal charges is most preferred.
3. Lewis structures are preferable when adjacent formal charges are zero or of the opposite sign.
4. The structure with the negative formal charges on the more electronegative atoms is preferred among other structures of the molecule or ion.
From the above rules, structure B has negative charges on the more electronegative oxygen atoms and has more zero formal charges on the atoms. The central atom, sulfur also has a zero formal charge.
What is CaF2(aq) + Rb
Answer:
RbF2 + Ca
Explanation:
Since Rb is located in IIA as well as Ca, Rb has ion form Rb2+
Hence CaF2 + Rb → RbF2 +Ca
Please be reminded, this answer may not be 100% correct
Why do different places on Earth have different climates?
Answer:
cause of the sun rotation
Explanation:
Answer:
The world is tilting on an edge that creates seasons.
Explanation:
And that's why different parts of the have different climates.
How many grams of Fe will be produced if 705.0g of H20 are produced?
Fe3O4 + 4H2
-->
3 Fe + 4H2O
2265 g Fe₃O₄
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightChemistry
Atomic Structure
Reading a Periodic TableStoichiometry
Using Dimensional AnalysisExplanation:Step 1: Define
[RxN - Balanced] Fe₃O₄ + 4H₂ → 3Fe + 4H₂O
[Given] 705.0 g H₂O
Step 2: Identify Conversions
[RxN] 4 mol H₂O → 1 mol Fe₃O₄
Molar Mass of H - 1.01 g/mol
Molar Mass of O - 16.00 g/mol
Molar Mass of Fe - 55.85 g/mol
Molar Mass of H₂O - 2(1.01) + 16.00 = 18.02 g/mol
Molar Mass of Fe₃O₄ - 3(55.85) + 4(16.00) = 231.55 g/mol
Step 3: Convert
Set up stoich: [tex]\displaystyle 705.0 \ g \ H_2O(\frac{1 \ mol \ H_2O}{18.02 \ g \ H_2O})(\frac{1 \ mol \ Fe_3O_4}{4 \ mol \ H_2O})(\frac{231.55 \ g \ Fe_3O_4}{1 \ mol \ Fe_3O_4})[/tex]Multiply/Divide/Cancel units: [tex]\displaystyle 2264.74 \ g \ Fe_3O_4[/tex]Step 4: Check
Follow sig fig rules and round. We are given 4 sig figs.
2264.74 g Fe₃O₄ ≈ 2265 g Fe₃O₄
How many moles are in 4.3 x 10 ^22 molecules of Na3PO4
Answer:
0.071 moles of Na₃PO₄ .
Explanation:
Given data:
Number of molecules of Na₃PO₄ = 4.3× 10²² molecules
Number of moles = ?
Solution:
1 mole contain 6.022 × 10²³ molecules
4.3× 10²² molecules × 1 mol / 6.022 × 10²³ molecules
0.71× 10⁻¹ mol
0.071 mol
The number 6.022 × 10²³ is called Avogadro number.
"It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance"
which of the following is NOT a function of the skeletal system?
A. supports the body
B. gives shape to the body
C. enables the body to move
D. yransports nlood throughout the body
Answer:
A yan hehehehe
salamat puso ma ah
To convert between units, you need to know the relationship between units. For example, one mile equals 5280 feet. This relationship can now be used as a conversion factor, set up as required by the question. For each conversion, choose the correct arrangement of the conversion factor and complete the calculation 1. Convert 7860 feet to miles 7860 feet x (A)
A: 1 mile
B: 5280 feet 7860 feet miles 2. Co 0.5 miles to feet 0.565 miles x (C) TD
C: Choose...
D: Choose 0.565 miles feet
Answer:
1. 7860 Feet = 1.488 miles
A= 1
B= 5280
2. 0.565 miles = 2983.2 feet
C= 0.565
D= 1
Explanation:
1. Convert 7860 feet to miles
1 miles= 5280 feet
1 Feet= 1/ 5280 miles
7860 Feet= 7860 ( 1/ 5280) miles
7860 Feet = 1.488 miles
A= 1
B= 5280
2. Convert 0.565 miles to feet
1 mile= 5280 feet
0.565 miles = 5280 feet * (0.565/1)
0.565 miles = 2983.2 feet
C= 0.565
D= 1
We see that when we have to convert feet into miles we divide the number by 5280 because feet are smaller than miles. Similarly when we have to convert miles into feet we multiply by the given number because miles are greater than feet.
The above method used is called the unitary method but we should always keep in mind that conversion from smaller to bigger units require divsion and from bigger to smaller units require multiplication.
What is the only way to be certain that a chemical change has occurred
Answer:
New kinds of products forms and the reaction is not easily reversible.
Explanation:
The only way to be certain that a chemical change has occurred is by finding out if new kinds of products have been formed.
A chemical change is a change in which new kinds of matter is formed. It is always accompanied by energy changes.
The process is not easily reversible.
Examples of chemical changes are combustion, rusting of iron, precipitation and souring of milk.
What type of crust is colliding?
Japan Trench
Eurasian Plate
Pacific Plate
Answer: The Eurasian Plate or both the Eurasian and Pacific Plate.
Explanation:
What is the coefficient, subscript for V, and subscript for O in V2O5
Answer: Coefficient 0
subscript for V 2
subscript for O 5
Explanation: yes
There is no coefficient in V₂O₅ and the subscript of vanadium V is 2 and the subscript of oxygen is 5.
What is vanadium pentoxide ?Vanadium pentoxide is an ionic compound formed by donating electrons from the vanadium metal to oxygen. The chemical formula of vanadium pentoxide is V₂O₅.
The chemical formula of a compound is written in terms of the chemical symbol of each constituent elements and the number of their atoms. The number of atoms is written as subscript for the chemical symbols.
In V₂O₅, there are are 2 vanadium atoms and 5 oxygen atoms. Coefficients are numbers prior to the formula in reaction. Here there is no coefficient and the subscript for V is 2 and that of O is 5.
Find more on chemical formula:
https://brainly.com/question/29031056
#SPJ2
how an object accelerates when it changes direction?
Answer:
An object which experiences either a change in the magnitude or the direction of the velocity vector can be said to be accelerating. This explains why an object moving in a circle at constant speed can be said to accelerate - the direction of the velocity changes.
Explanation:
Answer:
An object which experiences either a change in the magnitude.
Explanation:
the direction of the velocity changes.
Hope that helps :)
Have a good day
Dribbling a basketball harder into the floor makes it bounce higher is an example of what newton's law?
How is thermal energy transferred during conduction? Check all that apply.
Thermal energy is transferred between particles that are not touching each other.
Thermal energy is transferred between particles that are in direct contact with each other.
Thermal energy is transferred between objects of different temperatures.
Themal energy is transferred between objects of the same temperature.
Themel energy is transferred from slow-moving particles to fast-moving particles.
Themal energy is transferred from fast-moving particles to slow-moving particles, .
Answer:
Option 2, 3, and also 6 btw
Explanation:
The other guy was wrong
What is the SI unit for force?
Answer: The SI unit of force is the newton, symbol N.
Explanation:
Answer:
the SI unit of force is newton
name all 7 elements classified as metalloids.
PLEASE HELP ASAP
Answer:
Explanation
Boron (B)
Silicon (Si)
Germanium (Ge)
Arsenic (As)
Antimony (Sb)
Tellurium (Te)
Polonium (Po
.What type of energy includes both kinetic and potential energy?
Answer:
mechanical energy
Explanation:
What happens to water when it changes to ice
Answer:The atoms cool down and become slower and their bonds become close and they move less.
Explanation:I took science
According to the following reaction, how many moles of carbon dioxide will be formed upon the complete reaction of 28.6 grams of carbon monoxide with excess oxygen gas?
carbon monoxide (g) + oxygen (g) ----> carbon dioxide (g) + moles carbon dioxide
Explanation:
We have 2CO + O2 => 2CO2.
Moles of CO = 28.6g / (28g/mol) = 1.021mol.
Moles of CO2 = Moles of CO = 1.021mol.
please help me please help me
According to Image 2, which tectonic plate is composed of the largest percentage of oceanic lithosphere?
A. African Plate
B. Eurasian Plate
C. Indian Plate
D. Nazca Plate
Answer:
I think the answer is A the Afracan plate
Explanation:
hope this helps:)
Importance of Science and Technology in Contemporary world
Answer:
Technology, science and knowledge are important in modern contemporary society. The understanding of how social, cultural and material elements influence the production of new practices, new ways of understanding and new institutions is vital in our understanding of contemporary postmodern society.
Explanation:
1. impact of technological development on everyday life, 2. debates about the cultural significance of science and technology
Hope this helped! Brainlist?
Answer:
The importance of Science and Technology is so that if your tryin to prove your point with science you have to be educated on that in order to actually prove it. and for technology if we didn't have that we will not be able to know what is going on in society.
Explanation:
Water with a flowrate of 1 m3/min and benzene concentration of 150 mg/L flows through a 10 meter long, 0.1 m diameter steady state and conservative PFR, after which it is fed into a CMFR with a volume of 100 m3. A second water stream with a flowrate of 0.5 m3/min and benzene concentration of 150 mg/L is also fed into the CMFR. The CMFR is steady state and conservative. Calculate the effluent concentration of the CMFR.
Answer:
the effluent concentration of the CMFR is 150 mg/L
Explanation:
Given that;
flowrate of first water Q₁ = 1 m³/min
benzene concentration C₁ = 150 mg/L
flowrate of second water Q₂ = 0.5 m3/min
benzene concentration C₂ = 150 mg/L
To Calculate the effluent concentration of the CMFR, we use the expression;
[tex]C_{effluent}[/tex] = (Q₁C₁ + Q₂C₂) / Q₁ + Q₂
we substitute
[tex]C_{effluent}[/tex] = (1 × 150 + 0.5 × 150) / 1 + 0.5
[tex]C_{effluent}[/tex] = 225 / 1.5
[tex]C_{effluent}[/tex] = 150 mg/L
Therefore, the effluent concentration of the CMFR is 150 mg/L
What is the density of motor oil in g/mL if 1.25 quart (qt) weighs 2.25 pounds (lb)?
Answer:
0.86 g/mL
Explanation:
In order to solve the problem, you have to know the formula for "Density." Density refers to "mass per unit volume." It's formula is:
Density (ρ) = [tex]\frac{mass}{Volume}[/tex]Next, we have to convert the units of measurement in accordance to what is being asked in the problem. It is asking for "g/mL," which means we have to convert 1.25 quarts (qt.) to mL and 2.25 pounds (lbs.) to grams.
Let's solve.
1 quart = 946.35 mL1.25 qt. x [tex]\frac{946.35 mL}{1 qt.}[/tex] = 1,182.94 mL
1 pound = 453.592 grams2.25 pounds x [tex]\frac{453.592 grams}{1 pound}[/tex] = 1,020.58 grams
Now that we converted them to their appropriate units of measurement, we can now solve for density.
ρ = [tex]\frac{mass}{Volume}[/tex]ρ = [tex]\frac{1,020.58 grams}{1,182.94 mL}[/tex]ρ = 0.86 g/mLThe density of the motor oil is 0.86 g/mL
The density of molasses is 2.28g/mL. What volume of molasses would have a mass of 392.8g?
Answer:
V = 172.28 mL
Explanation:
density is mass divided by volume
p = density
m = mass
V = volume
p = m/v
V = m/p
V = 392.8/2.28
V = 172.28 mL
Why is it easier to switch to solar and wind energy as compared to other alternative energy sources? Select all that apply.
A. They are more cost-effective.
B. They require large, easily obtainable parcels of land.
C. They can be produced easily in areas with geothermal activity.
D. The land can be used for other purposes while supplying energy.
Answer:C. They can be produced easily in areas with geothermal activity.
D. The land can be used for other purposes while supplying energy.
Explanation:
Both c and d are correct
It is easier to switch to solar and wind energy as compared to other alternative energy sources because they can be produced easily in areas with geothermal activity and can be used for other purposes while supplying energy.
What is solar energy?Solar energy is any type of energy generated by the sun. Solar energy can be harnessed directly or indirectly for human use.
Generating energy that produces no greenhouse gas emissions from fossil fuels and reduces some types of air pollution.
Diversifying energy supply and reducing dependence on imported fuels. Creating economic development and jobs in manufacturing, installation, and more.
Hence, options C and D are correct.
Learn more about the solar energy here:
https://brainly.com/question/23611169
#SPJ2
7.
Use the reaction below for the reaction of dicyanoacetylene with
ozone to produce carbon monoxide and nitrogen.
3C4N2(8) + 403(g) → 1200(8) + 3N2(g).
What volume of CO is produced when 1.20 L of C4N2 reacts?
a 0.300 L CO
b 3.60 L CO
C 14.4 L CO
d 4.80 L CO
Answer:
D
Explanation:
The volume of carbon monoxide is produced when 1.20 L of dicyanoacetylene reacts is
What is stoichiometry?Stoichiometry of any reaction tells about rhe relative amount of substance present before and after the completion of any chemical reaction.
Given balanced chemical reaction between dicyanoacetylene and ozone to produce carbon monoxide and nitrogen is:
3C₄N₂ + 4O₃ → 12CO + 3N₂
From the stoichiometry of the reaction it is clear that:
3 liters of C₄N₂ = produces 12 liters of CO
1.20 liters of C₄N₂ = produces 12/3×1.20=4.8 liters of CO
Hence option (d) is correct i.e. 4.8 liters.
To know more about stoichiometry, visit the below link:
https://brainly.com/question/16060199
HELP!!! The chemical formula is different from the empirical formula in
A) H2O2
B) CO2
C) CO.
OD) H20.
Answer:
the Ans is H2O2
Explanation:
THANKS.............
Which change of state involves a release of energy?
Answer: CONDENSATION When steam is cooled, it releases thermal energy and turns into its liquid state. This process is called condensation. reversed if the liquid is cooled. The change from the liquid state to the solid state is called freezing
GIVING 100 PTS EASY SCIENCE PLS HELP
Answer:
Hello there!
I believe the answer you are looking for is A!
Explanation:
It makes sense to me more than the other answer choices.
have a nice day