Please help
Calculate the sodium ion (Na+) concentration for a 0.812 M Na3PO4 solution.
[Na+]=____M
Explanation:
Correct option is
B
0.750 M
Na3PO4 dissociates as:
Na3PO4⇌3Na++PO43−
∴ conc. of Na+ would be =3×0.250=
hope help
Northern cod produce proteins that protect their cells from damage caused by subzero temperatures. Measurements of the osmotic pressure for two "antifreeze" proteins at 18°C yielded the data listed below. Use this information to calculate the molar mass for each of the proteins. Assume these proteins are nonelectrolytes and use the value i = 1.
Required:
If a 54.1 mg sample of protein A in 1.5 mL of water has an osmotic pressure of 0.285 atm, what is the molar mass of protein A?
Answer: The molar mass of protein A is 3023.41 g/mol.
Explanation:
To calculate the osmotic pressure, we use the formula:
[tex]\pi=i\times M\times R\times T[/tex]
OR
[tex]\pi=i\times \frac{\text{Given mass of solute}\times 1000}{\text{Molar mass of solute}\times \text{Volume of solution}}\times R\times T[/tex] .....(1)
Where,
[tex]\pi[/tex] = osmotic pressure = 0.285 atm
i = 1
Given mass of protien (solute) = 54.1 mg = 0.0541 g (Conversion factor: 1 g = 1000 mg)
Volume of solution = 1.5 mL
R = Gas constant = 0.0821 L.atm/mol.K
T = temperature = [tex]18^oC=[18+273]=291K[/tex]
Plugging values in equation 1:
[tex]0.285atm=1\times \frac{0.0541\times 1000}{\text{Molar mass of protein}\times 1.5}\times 0.0821L.atm/mol.K\times 291K\\\\\text{Molar mass of protein}=\frac{1\times 0.0541\times 1000\times 0.0821\times 291}{0.285\times 1.5}\\\\\text{Molar mass of protein}=3023.41g/mol[/tex]
Hence, the molar mass of protein A is 3023.41 g/mol.
The molar mass of the protein is 3018 g/mol.
We know that the osmotic pressure is obtained using the formula;
Osmotic pressure = iMRT
i = Van't Hoff factorM = molar concentrationR = gas constantT = absolute temperatureconcentration of the protein = 54.1 * 10^-3g/M/ 1.5 * 10^-3 L
Where M = molar mass of the protein
So;
0.285 atm = 54.1 * 10^-3g/ 1.5 * 10^-3 L M * 0.0821 L.atm/mol.K * 291 K
0.285 = 1.29/1.5 * 10^-3M
M = 1.29/0.285 * 1.5 * 10^-3
M = 3018 g/mol
Learn more about osmotic pressure: https://brainly.com/question/4631715
What is the concentration of a solution that has a volume of 2.5 L and contains 660 g of calcium phosphate? (molar mass of calcium phosphate = 310.18 g/mol)
Answer:
0.85 M
Explanation:
Step 1: Given data
Mass of calcium phosphate (m): 660 gVolume of solution: 2.5 LMolar mass of calcium phosphate (M): 310.18 g/molStep 2: Calculate the moles (n) corresponding to 660 g of calcium phosphate (solute)
We will use the following expression.
n = m/M
n = 660 g/(310.18 g/mol) = 2.13 mol
Step 3: Calculate the molar concentration (molarity) of the solution
Molarity is equal to the moles of solute divided by the liters of solution.
M = 2.13 mol/2.5 L = 0.85 M
Which of the following IS TRUE for covalent bonding?
A. Covalent bonding involves the sharing of electrons
B. Covalent bonding occurs between metals
C. Covalent bonding occurs between non-metals
D. Covalent bonding occurs between atoms with a large electronegativity
difference.
E. Both A and D
F. Both A and C
G. Both C and D
How many grams of gasoline would you need to burn to move your car 2.5 miles which takes 5,375 kJ? (Hrxn= 47kJ/g)
Answer:
1.1 × 10² g
Explanation:
The combustion of gasoline releases energy that is used to move the car. The enthalpy of reaction (ΔH°rxn) of the combustion of gasoline is 47 kJ/g, that is, 47 kiloJoule are produced per gram of gasoline burned. The mass of gasoline to be burned to release 5,375 kJ is:
5,375 kJ × 1 g Gasoline/47 kJ = 1.1 × 10² g
How much aluminum oxide in grams is produced from the reaction of 3.5 moles of oxygen with 4.5 moles of aluminum?
Answer:
The mass of 3.5 moles of Ca is 140 g to two significant figures
This unit describes volume, and may be used to describe liquids or gases.
O A. Meter
O B. Liter
O C. Gram
O D. Mole
Answer: aaaaaaaaaaa
The basic SI unit for volume is the cubic meter (m3), but smaller volumes may be measured in cm3, and liquids may be measured in liters (L) or milliliters (mL).
Explanation:
(S)-3-Methylhexane undergoes radical bromination to yield optically inactive 3-bromo-3-methylhexane as the major product. Is the product chiral
Answer:
No, the product is not chiral
Explanation:
The compound (S)-3-Methylhexane is chiral. However, the bromination of this compound via free radical mechanism yields an achiral intermediate as shown in the image attached to this answer.
This achiral intermediate is a flat and planar tertiary radical. Attack on either face of this radical specie is possible. This leads us to obtain a 50-50 mixture of (R) and (S) - 3-bromo-3-methylhexane.
This is a racemic mixture hence it is optically inactive.
propanoyl chloride reacts with LiAlH4, what will be the product
3. What do you call the process by which humans extracts stones fron the mountains for
construaction purposes
How many pili are in a bacterial cell
Answer: Bacterial species where observed Typical number on cell Distribution on cell surface
Escherichia coli (common pili or Type 1 fimbriae) 100-200 uniform
Neisseria gonorrhoeae 100-200 uniform
Streptococcus pyogenes (fimbriae plus the M-protein) ? uniform
Pseudomonas aeruginosa 10-20 polar
Explanation:
Pili are structures that extend from the surface of some bacterial cells.
These are hollow, non-helical, filamentous appendages.
Hope it helps you
Suppose you have 250g of gold(I) Chloride. How many grams of Gold do you have?
29.26 gram
Explanation:
No of molecules = no of mole × Avogadro's number
No of molecules = mass in gram/ molar mass × Avogadros number
Mass in gram =No of molecules×molar mass / Avogadros number
Mass in gram = 3.012 ×10^23 × 58.5/6.02×10^23
29.26 gram
how do I name cycloalkanes?
Answer:
[tex]{ \tt{aromatic \: alkanes}} \\ \\ { \underline{ \blue{ \tt{becker⚜jnr}}}}[/tex]
1. Determine the number of sides of the cyclic compound.
2. Use IUPAC theory, determine the functional group and its position.
Cu+2 + Cl-1. Help me plssss
Answer:
Copper(I) chloride, commonly called cuprous chloride, is the lower chloride of copper, with the formula CuCl.
Explanation:
Use the following balanced equation to answer the questions below.
9 How many grams of O₂ are needed to produce 15.5 g Fe₂O3 in the following reaction? Fe(s) + O₂(g) → Fe₂O3 (s)
Answer:
Explanation:
so u can work out the amount of moles in FeO3 by doing mr of fe3o3 is 55.8*3+16*3=215.4
moles= mass/mr so you do 15.5g/215.4=0.0719 moles
then using 1 to 1 ratio so O2 moles is 0.0719
then use the equation mass=mole*mr
so 0.0719*16=1.15g
hope this make sense :)
Who has the most sensitive taste buds?
the elderly
adults
babies
teenagers
Answer:
babies have the most sensitive taste buds
gabriel created 270 grams of aluminum oxide from 145 grams of aluminum. what was his percent yield?
A. 99.1%
B. 98.6%
C. 97.2%
D.96.5%
( it’s not “D” because I got it wrong lol) pls help tho
Answer:
% yield = 200%
Explanation:
By using 145 gram of aluminium
Using 26.982 g/mol of Al, 101.96 g/mol of Aluminium oxide is produced
Using 145 grams of aluminium, the yield of Aluminium oxide would have been = (101.96 g/mol/26.982 g/mol)/145 grams
= 547.9282485 gram
Now % yield = actual yield /theoretical yield * 100
Substituting the given values, we get -
% yield = (547.928/270) *100
% yield = 200%
Which of the following is an example of a natural polymer?
a) Wool
Ob) Super Glue
c) Nylon
d) Teflon
please hurry
Answer:
A
Explanation:
because it occurs in nature and all other option are synthesis.
If one of your samples had a mass of 25.62 g and a volume of 21.9 cm3, would this sample also be the same material you have been working with
Answer:
If the density of the material is equal to the density of the material you have been working with it is possible that the samples are the samples
Explanation:
Density is an intensive property of the matter (Doesn't depends of its amount) that is widely used to identify a substance. Density is the ratio between the mass of the substance (In this case 25.62g) and the volume this amount occupies (21.9cm³). The density is:
25.62g / 21.9cm³ =
1.17g/cm³.
If the density of the material is equal to the density of the material you have been working with it is possible that the samples are the samplesPLS HELP ME WITH THESE TWO QUESTIONS WILL MARK U AS BRAINLIEST !!
Answer:
See explanation
Explanation:
From the parameters provided;
V=?
n= 1.46 moles
P= 0.982 ATM
T= 13°C + 273 = 286 K
R = 0.0821 L.atm/mol.K
From
PV= nRT
V= nRT/P
V= 1.46 × 0.0821 × 286/0.982
V= 34.9 L
b) Boyle's law states that, the pressure of a given mass of gas is inversely proportional to its volume at constant temperature and pressure. This statement is a correct postulation about ideal gases which can be arrived at from the kinetic theory of gases.
3. If a gas exerts 1.2 atm of pressure at a volume of 31 liters and a temperature of 360K, how many moles of the gas are in the container.
6CO2 + 6H20 --> C6H12O6 + 602
What is the total number of moles of CO2 needed to make 2 moles of CH1206?
Answer:
12 mol CO₂
General Formulas and Concepts:
Atomic Structure
CompoundsMolesMole RatioStoichiometry
Analyzing reactions rxnUsing Dimensional AnalysisExplanation:
Step 1: Define
Identify
[rxn] 6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂
[Given] 2 mol C₆H₁₂O₆
[Solve] mol CO₂
Step 2: Identify Conversions
[rxn] 6CO₂ → C₆H₁₂O₆
Step 3: Convert
[DA] Set up: [tex]\displaystyle 2 \ mol \ C_6H_{12}O_6(\frac{6 \ mol \ CO_2}{1 \ mol \ C_6H_{12}O_6})[/tex][DA] Multiply [Cancel out units]: [tex]\displaystyle 12 \ mol \ CO_2[/tex]Write the empirical formula of at least four binary ionic compounds that could be formed from the following ions: Ca^2 , Al^3 ,I^-,S^2-
Answer:
Write the empirical formula of at least four binary ionic compounds that could be formed from the following ions: Ca^2 , Al^3 ,I^-,S^2-
Explanation:
1)Formula of calcium iodide:
The compound of Ca^2+ and I^-1:
[tex]CaI_2[/tex]
2) Formula of calcium sulfide:
[tex]CaS[/tex]
3) Formula of aluminum iodide:
[tex]AlI_3[/tex]
4) Formul aluminum sulfide:
[tex]Al_2S_3[/tex]
These are the four ionic compounds that are formed.
liquid mass has a volume of 9.2 and density of 0.75
Answer:
6.9
Explanation:
Mass(m)=?
Density (D)=0.75
Volume (v)=9.2
M=D×V
M=0.75×9.2
M=6.9
You can hear sounds around the corner of a door due to the wave interaction called diffraction.
Answer:
Sorry I didn't get it
Explanation:
Where is the question?
What is exactly the pH value of distilled water?
How many atoms are there in 5.8 mol of iron
Academic Vocabulary The schools in one area are
often called a school system. What are some of the
components of this system?
Explanation:
Standards.
Assessments.
Accountability.
Professional Development.
School Autonomy.
Parent Involvement.
Learning Readiness.
Technology.
A pure copper cube has an edge length of 1.76 cm. How many copper atoms does it contain? (volume of a cube = (edge length)^3; density of copper = 8.96 g/cm^3 )