Give an example of experimental bias

GuDViN [60]

Answer:

3.01x10^23

Explanation:

In order to determine the amount of molecules, you have to use Avogadro's number which = 6.02x10^23. To calculate this, multiply the number of moles with Avogadro's number to get the above answer.

Hope this helps!

3 0

3 years ago

Draw the structure of the starting material in the ozonolysis reaction below. Hint: The starting material and product have the s

Crank

<h3>Answer:</h3>

The starting material involved in the formation of 5-Oxoheptanal is 1-ethylcyclopent-1-ene as shown in reaction below.

<h3>Explanation:</h3>

Ozone is one of the reactive allotrope of oxygen. It reacts vigorously with unsaturated compounds like alkenes and alkynes. In this reaction alkene and O₃ first react to produce Molozonide which is highly unstable and rearranges to form a stable ozonide as shown in scheme attached below.

Furthermore, the ozonide on reduction is convertwed into ketones and aldehydes respectively.

6 0

3 years ago

Read 2 more answers

In another process in which 235 92U undergoes neutron bombardment, the following reaction occurs: 235 92U+10n→AZSr+143 54Xe+310n

Dmitrij [34]

Answer:

$_{38}^{90}\textrm{Sr}$

Mass defect of the oxygen nucleus is:- 0.1370 amu

Explanation:

In a nuclear reaction, the total mass and total atomic number remains the same.

For the given fission reaction:

$^{235}_{92}\textrm{U}+^1_0\textrm{n}\rightarrow ^A_Z\textrm{Sr}+^{143}_{54}\textrm{Xe}+3^1_0\textrm{n}$

To calculate A:

Total mass on reactant side = total mass on product side

235 + 1 = A + 143 + 3

A = 90

To calculate Z:

Total atomic number on reactant side = total atomic number on product side

92 + 0 = Z + 54 + 0

Z = 38

<u>Hence, the isotopic symbol of strontium is:- $_{38}^{90}\textrm{Sr}$ </u>

The element given is:- $_{8}^{16}\textrm{O}$

Atomic number : It is defined as the number of electrons or number of protons present in a neutral atom.

Also, atomic number of O = 8

Thus, the number of protons = 8

Mass number is the number of the entities present in the nucleus which is the equal to the sum of the number of protons and electrons.

Mass number = Number of protons + Number of neutrons

16 = 8 + Number of neutrons

Number of neutrons = 8

Mass of neutron = 1.008665 amu

Mass of proton = 1.007825 amu

Calculated mass = Number of protons*Mass of proton + Number of neutrons*Mass of neutron

Thus,

Calculated mass = (8*1.007825 + 8*1.008665) amu = 16.13192 amu

Given, mass of the atom = 15.994914 amu

Mass defect = Δm = |16.13192 - 15.994914| amu = 0.137006 amu

<u>Mass defect of the oxygen nucleus is:- 0.1370 amu</u>

4 0

3 years ago

Q.1)Wash and wear clothes are manufactured using

Pavel [41]

<h3>(c) Terylene fibres</h3>

Explanation:

<h3>TERYLENE FIBRES </h3>

Terylene Fibres is a crease-resistant, long-lasting material with a low moisture content. Pests like as moths and mildew have no effect on it. As a result, it's utilized to make fabrics that can be washed and wear clothes. It's also mixed with cotton (Terycot) and wool (Terywool) to add durability.

5 0

2 years ago

The concentration of KIO3 in solution A is 0.04 M. Calculate the number of moles of potassium iodate in 1 mL of this solution.

Lemur [1.5K]

Answer:

Number of moles of KIO₃ = 4.0×10⁻⁵ mol

Explanation:

Given data:

Concentration of solution = 0.04 M

Volume of solution = 1 mL

Number of moles of KIO₃ = ?

Solution:

Molarity = concentration

Molarity = number of moles / volume in L

We will convert the volume into L.

1 mL×1 L /1000 mL

0.001 L

Now we will put the values in formula,

0.04 M = number of moles / 0.001 L

Number of moles = 0.04 M ×0.001 L

Number of moles = 4.0×10⁻⁵ mol

6 0

3 years ago