1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Yakvenalex [24]
3 years ago
14

What would be the mass percent of a NaOHsolution in which 11.6g of NaOHwere completely dissolved in 238.4g of water?

Chemistry
1 answer:
Snezhnost [94]3 years ago
4 0

Answer:

4.54 % NaOH

Explanation:

\text{Mass percent} = \dfrac{\text{Mass of component}}{\text{Total mass}} \times 100 \, \%

Data:

Mass  of NaOH     =   11.6 g

Mass of water      =   38.4 g

Mass of solution = 250.0 g

Calculation:

\text{Mass \% NaOH} = \dfrac{\text{11.6 g NaOH}}{\text{250 g solution}} \times 100 \% = \textbf{4.54 \% NaOH}

You might be interested in
What are you and what do you want with my attendance
Lelu [443]

Answer:

Such a waste of points but lol

8 0
3 years ago
Based on the information given about capsules, which of the following types of molecules would you suspect comprises an S. pneum
Sergio039 [100]

"Polysaccharide carbohydrate" comprises an S. pneumoniae capsule.

<u>Option:</u> C

<u>Explanation:</u>

The lengthy sequences of carbohydrate molecules, primarily polymeric carbohydrates constructed of units of monosaccharides linked together through glycosidic connections, understood as Polysaccharides. This carbohydrate can respond to water by catalyzing amylase enzymes, which generate component sugars.

A major human pathogen is Streptococcus pneumoniae or pneumococcus. The virulence is primarily due to its polysaccharide envelope, which protects it from the recipient immune response, and this has led to comprehensive study of the shell.

8 0
3 years ago
A tank of 0.1m3 volume contains air at 25∘C and 101.33 kPa. The tank is connected to a compressed-air line which supplies air at
Dmitriy789 [7]

Answer:

Amount of Energy = 23,467.9278J

Explanation:

Given

Cv = 5/2R

Cp = 7/2R wjere R = Boltzmann constant = 8.314

The energy balance in the tank is given as

∆U = Q + W

According to the first law of thermodynamics

In the question, it can be observed that the volume of the reactor is unaltered

So, dV = W = 0.

The Internal energy to keep the tank's constant temperature is given as

∆U = Cv((45°C) - (25°C))

∆U = Cv((45 + 273) - (25 + 273))

∆U = Cv(20)

∆U = 5/2 * 8.314 * 20

∆U = 415.7 J/mol

Before calculating the heat loss of the tank, we must first calculate the amount of moles of gas that entered the tank where P1 = 101.33 kPa

The Initial mole is calculated as

(P * V)/(R * T)

Where P = P1 = 101.33kPa = 101330Pa

V = Volume of Tank = 0.1m³

R = 8.314J/molK

T = Initial Temperature = 25 + 273 = 298K

So, n = (101330 * 0.1)/(8.314*298)

n = 4.089891232222

n = 4.089

Then we Calculate the final moles at P2 = 1500kPa = 1500000Pa

V = Volume of Tank = 0.1m³

R = 8.314J/molK

T = Initial Temperature = 25 + 273 = 298K

n = (1500000 * 0.1)/(8.314*298)

n = 60.54314465936812

n = 60.543

So, tue moles that entered the tank is ∆n

∆n = 60.543 - 4.089

∆n = 56.454

Amount of Energy is then calculated as:(∆n)(U)

Q = 415.7 * 56.454

Q = 23,467.9278J

3 0
2 years ago
Functional groups create active sites in molecules. The polar part of a molecule that can hydrogen bond to water is said be hydr
VMariaS [17]

Answer:

Polar/Hydrophilic

Explanation:

Fluorine, Nitrogen and Oxygen are strong electronegative atoms and by definition, Electronegativity is the amount of pull or the high affinity of an atom to electrons.

Polar bond occurs when there is a high difference between the electronegativity value of both atoms that take part in the bond.

A polar molecule has a net dipole from the distribution of its positive and negayive charges. Hydrophobic and Hydrophilic (in chemistry, Polar) are terms dependent on the overall distribution of charge in its molecule.

Therefore, bonds between C-N, C-O and C-Cl are polar covalent bonds a d this is because of the jigh electronegativity possessed by Nitrogen, Oxygen and Chlorine.

5 0
3 years ago
Household substances that contains acid​
lidiya [134]

Answer:

milk, lemon juice, toothpaste and baking soda

8 0
2 years ago
Other questions:
  • Carboxyhemoglobin may be formed when a person inhales air that contains
    13·1 answer
  • How can exposoure to high energy waves be both harmful and helpful to cells??
    9·1 answer
  • Chemicals A and B react according to the equation A + B → C. How will the concentrations of each component of the reaction chang
    15·2 answers
  • What elements react the most? Like have the most reactivity.
    12·1 answer
  • state the rules governing the number of significant figures that result from each of the following operations addition and subtr
    10·1 answer
  • A group of atoms that remain bonded together and behave as a single atom in a chemical reaction is
    15·1 answer
  • What is Keystone XL pipeline?
    7·1 answer
  • For the following compound, determine each element and if the element is a metal or nonmetal. Also determine if the compound has
    9·1 answer
  • Identify the correct mole ratio for each substance.
    5·1 answer
  • 1- If an atom lose 2 electrons it will give………… A) Ion with 2+ charge called cation C) Ion with 3+ charge called cation B) Ion w
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!