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3 years ago

Name two objects which are hard to touch

Chemistry

2 answers:

ziro4ka [17]3 years ago

7 0

fire and mercury

i think i am not sure

but pls brainlist

Anni [7]3 years ago

3 0

Answer:

Name of two hard objects is Brick and Wood.

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An element and an atom are different but related because

White raven [17]

Answer:

c) An element is made up of all the same type of atom

Explanation:

Atoms are the smallest unit of an element that consists of protons, electrons and neutrons in its structure. An element is the smallest part of a chemical substance that cannot be disintegrated i.e. it cannot be broken down further.

Atoms and elements are different in many ways but they are connected in the sense that an element contains only one type of atoms. For example, aluminum element is made up of only aluminum atoms. Different atoms form a molecule but same atoms form an element.

4 0

3 years ago

How many water molecules are removed to assemble 10 fat molecules by joining glycerol and fatty acid molecules

algol13

20 molecules minus ten degrees equals 1001

4 0

2 years ago

A student followed the procedure of this experiment to determine the solubility product of zinc(II) iodate, Zn(IO3)2. Solutions

Fed [463]

Answer:

Explanation:

Complete the table below and determine the solubility product constant.

[Zn(NO₃)₂] 0, M Initial 0.226, 0.101 0.0452, 0.0118

[KIO₃] 0, M Titrant 0.200, 0.200, 0.200, 0.200

V₀, mL of Zn(NO₃)₂100.0, 100.0, 100.0, 100.0

V, mL of KIO₃ titrant 12.9, 12.4, 13.0, 18.3

What needs to be determined are the following for each column/sample

V0 + V, mL

[Zn²⁺] + [IO³⁻] ⇄ [Zn²⁺][IO³⁻]2

log [Zn²⁺][IO³⁻]2

$\frac{\sqrt{Zn^{2+}}}{1 + \sqrt{Zn^{2+}}}$

Then there's the determination of Ksp itself

log Ksp = Ksp of Zn(IO3)2 =

Considering this, which of the ion products is closest to Ksp, and why?

Finally, the titration volumes for the first three samples don't vary greatly. However the last sample is considerably larger. Why is this to be expected?

The attached figures shed more light on the solution to this problem

7 0

3 years ago

Calculate the pH of a C6H5OH phenol solution, whose hydronium ion concentration [H3O +] is 1.8 x 10e-5 M

Sidana [21]

Answer: The pH of phenol solution is 4.7

Explanation:

pH or pOH is the measure of acidity or alkalinity of a solution.

pH is calculated by taking negative logarithm of hydronium ion concentration.

$pH=-\log [H_3O^+]$

Given : $[H_3O^+]=1.8\times 10^{-5}M$

Putting in the values we get

$pH=-\log[1.8\times 10^{-5}M]$

$pH=4.7$

Thus pH of phenol solution is 4.7

5 0

4 years ago

Chemists studied the formation of phosgene by sealing 0.96 atm of carbon monoxide and 1.15 atm of chlorine in a reactor at a cer

lukranit [14]

Answer:

3.9

Explanation:

Let's consider the following reaction at equilibrium.

CO(g) + Cl₂(g) ↔ COCl₂(g)

We can find the pressures at equilibrium using an ICE chart.

CO(g) + Cl₂(g) ↔ COCl₂(g)

I 0.96 1.15 0

C -x -x +x

E 0.96-x 1.15-x x

The sum of the partial pressures is equal to the total pressure.

pCO + pCl₂ + pCOCl₂ = 1.47

(0.96-x) + (1.15-x) + x = 1.47

2.11 - x = 1.47

x = 0.64

The pressures at equilibrium are:

pCO = 0.96 - x = 0.32 atm

pCl₂ = 1.15 - x = 0.51 atm

pCOCl₂ = x = 0.64 atm

The pressure equilibrium constant (Kp) is:

Kp = pCOCl₂ / pCO × pCl₂

Kp = 0.64 / 0.32 × 0.51

Kp = 3.9

5 0

3 years ago

Name two objects which are hard to touch​

Name two objects which are hard to touch