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beks73 [17]
1 year ago
6

What is an hydroxide solution commonly used in labs​

Chemistry
1 answer:
Ira Lisetskai [31]1 year ago
6 0

sodium hydroxide (NAOH) a.k.a causic soda commonly used in labs​.

  • MOLAR MASS of naoh is 39.997 g/mol.
  • It is dry hard brittle, white stocks in large fused opaque white-stone like masses having a dense crystalline fracture in small pellets/flakes.
  • it is very delinquent  and one of the strongest base , acts as a saponifying agent which is used in industrial purposes.
  • It is an important industrial chemical as it is used on its own and is also used as a raw material in the production of other chemicals. The basis for the production of sodium hydroxide is the electrolysis of brine.

To know more about sodium hydroxide visit :

brainly.com/question/20892971

#SPJ9

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Which five statements about hemoglobin and myoglobin structure are true? Each iron atom can form six coordination bonds. One of
Ulleksa [173]

Answer:

Here's what I get  

Explanation:

Each iron atom can form six coordination bonds. One of these bonds is formed between iron and oxygen.  

TRUE

By itself, heme is not a good oxygen carrier. It must be part of a larger protein to prevent oxidation of the iron atom.  

TRUE

Molecular oxygen binds irreversibly to Fe²⁺ in heme.  

False. It binds reversibly with heme.

Heme is composed of an organic protoporphyrin component and a metal atom.  

TRUE

Hemoglobin and myoglobin are heterotetramers.

False. Hemoglobin is a tetramer. Myoglobin a monomeric protein.

Both hemoglobin and myoglobin contain a prosthetic group called heme, which contains a central iron atom.

TRUE

Each hemoglobin molecule can bind four oxygen molecules; each myoglobin can bind only one oxygen molecule.

TRUE

7 0
3 years ago
Read 2 more answers
You wish to prepare a tape-casting slip containing 50 vol% Al2O3 and 50 vol% polyvinyl butyral (PVB) binder. If the density of A
belka [17]

<u>Answer:</u> The mass of PVB required to produce 1000 grams of tape is 213.4 grams

<u>Explanation:</u>

To calculate the mass of aluminium oxide, we use the equation:

\text{Density of substance}=\frac{\text{Mass of substance}}{\text{Volume of substance}}       .......(1)

  • <u>For Al_2O_3</u>

We are given:

50% (v/v) of Al_2O_3

This means that 50 mL of aluminium oxide is present in 100 mL of tape

Calculating the mass of aluminium oxide by using equation 1:

Density of aluminium oxide = 3.98 g/cm^3

Volume of aluminium oxide = 50mL=50cm^3     (Conversion factor:  1mL=1cm^3 )

Putting values in equation 1, we get:

3.98g/cm^3=\frac{\text{Mass of aluminium oxide}}{50cm^3}\\\\\text{Mass of aluminium oxide}=(3.98g/cm^3\times 50cm^3)=199g

Mass of aluminium oxide = 199 g

  • <u>For PVB:</u>

We are given:

50% (v/v) of PVB

This means that 50 mL of PVB is present in 100 mL of tape

Calculating the mass of PVB by using equation 1:

Density of PVB = 1.08 g/cm^3

Volume of PVB = 50mL=50cm^3

Putting values in equation 1, we get:

1.08g/cm^3=\frac{\text{Mass of PVB}}{50cm^3}\\\\\text{Mass of PVB}=(1.08g/cm^3\times 50cm^3)=54g

Mass of PVB = 54 g

Mass of tape = Mass of aluminium oxide + mass of PVB

Mass of tape = [199 + 54] g = 253 g

To calculate the mass of PVB required to produce 1000 g of tape, we use unitary method:

When 253 grams of tape is made, the mass of PVB required is 54 g

So, when 1000 grams of tape is made, the mass of PVB required will be = \frac{54}{253}\times 1000=213.4g

Hence, the mass of PVB required to produce 1000 grams of tape is 213.4 grams

4 0
3 years ago
Which statements explain the relationship between mass, velocity and kinetic energy? Select the TWO (2) that apply.
Ad libitum [116K]

Answer:

I think D

Explanation:

Kinetic energy has a direct relationship with mass, meaning as mass increases so does the kinetic Energy of an object.

6 0
3 years ago
A chemist titrates of a hypochlorous acid solution with solution at . Calculate the pH at equivalence. The of hypochlorous acid
const2013 [10]

The question is incomplete, here is the complete question:

A chemist titrates 110.0 mL of a 0.2412 M hypochlorous acid (HCIO) solution with 0.0613 M NaOH solution at 25°C. Calculate the pH at equivalence. The pKa of hypochlorous acid is 7.50. Round your answer to 2 decimal places

<u>Answer:</u> The pH of the solution is 10.09

<u>Explanation:</u>

To calculate the volume of base, we use the equation given by neutralization reaction:

n_1M_1V_1=n_2M_2V_2

where,

n_1,M_1\text{ and }V_1 are the n-factor, molarity and volume of acid which is HClO

n_2,M_2\text{ and }V_2 are the n-factor, molarity and volume of base which is NaOH.

We are given:

n_1=1\\M_1=0.2412M\\V_1=110.0mL\\n_2=1\\M_2=0.0613M\\V_2=?mL

Putting values in above equation, we get:

1\times 0.2412\times 110.0=1\times 0.0613\times V_2\\\\V_2=\frac{1\times 0.2412\times 110.0}{1\times 0.0613}=432.8mL

At equivalence, the number of moles of acid is equal to the number of moles of base. Also, the moles of salt which is NaClO will also be the same.

To calculate the number of moles for given molarity, we use the equation:

\text{Molarity of the solution}=\frac{\text{Moles of solute}\times 1000}{\text{Volume of solution (in mL)}}     .....(1)

  • <u>For HClO:</u>

Molarity of HClO solution = 0.2412 M

Volume of solution = 110.0 mL

Putting values in equation 1, we get:

0.2412M=\frac{\text{Moles of HClO}\times 1000}{110}\\\\\text{Moles of HClO}=\frac{(0.2412\times 110)}{1000}=0.026532mol

  • <u>For NaClO:</u>

Moles of NaClO = 0.026532 moles

Volume of solution = [432.8 + 110] mL = 542.8 mL

Putting values in above equation, we get:

\text{Molarity of NaClO}=\frac{0.026532\times 1000}{542.8}=0.0489M

To calculate the pH of the solution, we use the equation:

pH=7+\frac{1}{2}[pK_a+\log C]

where,

pK_a = negative logarithm of weak acid which is hypochlorous acid = 7.50

C = concentration of the salt = 0.0489 M

Putting values in above equation, we get:

pH=7+\frac{1}{2}[7.50+\log (0.0489)]\\\\pH=7+3.09=10.09

Hence, the pH of the solution is 10.09

4 0
3 years ago
(Extra points+Brainliest Answer, :) happy holidays)
grigory [225]

the answer is 360 g H2O with a 90.3 yeild percentage

7 0
3 years ago
Read 2 more answers
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