Who first published the classification of the elements that is the basis of our periodic table today

kicyunya [14]

Answer: LOL. I think thats how-

6 0

3 years ago

Each student in Ms. Major's class was given an unknown substance. Ms. Major gave her students a list, shown below, of substances

soldi70 [24.7K]

Answer;

Water 1.0 g/mL 100°C colorless liquid

Explanation:

thats the answer

7 0

4 years ago

Read 2 more answers

Water is a compound not a mixture. Justify this statement by giving two reasons.

Allushta [10]

Answer:

Water is a compound and not a mixture. The reasons are the following:

1) It is held tightly through bonds called chemical bonds which is the characteristic of compound and not mixture.

2) It cannot be separated by physical means but can be separated by chemical means.

7 0

3 years ago

Read 2 more answers

What is the concentration of NaCl in a solution if titration of 15.00 mL of the solution with 0.2503 M AgNO3 requires 20.22 mL o

Nina [5.8K]

Answer:

The concentration of NaCl = 0.3374 M

Explanation:

Given :

Molarity of AgNO₃ = 0.2503 M

Volume of AgNO₃ = 20.22 mL

The conversion of mL into L is shown below:

$1 mL= 10^{-3} L$

Thus, volume of the solution = 20.22×10⁻³ L

Molarity of a solution is the number of moles of solute present in 1 L of the solution.

$Molarity=\frac{Moles\ of\ solute}{Volume\ of\ the\ solution}$

The formula can be written for the calculation of moles as:

$Molarity=\frac{Moles\ of\ solute}{Volume\ of\ the\ solution}$

Thus,

$Moles\ of\ AgNO_3 =Molarity \times {Volume\ of\ the\ solution}$

$Moles\ of\ AgNO_3 =0.2503 \times {20.22\times 10^{-3}}\ moles$

$Moles\ of\ AgNO_3 = 5.0611 \times 10^{-3} moles$

The chemical reaction taking place:

$AgNO_3_(aq) + NaCl_(aq) \rightarrow AgCl_(s) + NaNO_3_(aq)$

According to reaction stoichiometry:

<u>1 mole</u> of AgNO₃ reacts with <u>1 mole</u> of NaCl

Thus,

5.0611×10⁻³ moles of AgNO₃ reacts with 5.0611×10⁻³ moles of NaCl

Thus, moles of NaCl required = 5.0611×10⁻³ moles

Volume of NaCl required = 15.00 mL

The conversion of mL into L is shown below:

$1 mL= 10^{-3} L$

Thus, volume of the solution = 15.00×10⁻³ L

Applying in the formula of molarity as:

$Molarity=\frac{Moles\ of\ solute}{Volume\ of\ the\ solution}$

$Molarity\ of\ NaCl=\frac{5.0611\times 10^{-3}}{15.00\times 10^{-3}}$

$Molarity\ of\ NaCl= 0.3374 M$

<u>Thus, the concentration of NaCl = 0.3374 M</u>

6 0

3 years ago

Part A: Dalton’s Atomic Model

kakasveta [241]

John Dalton’s atomic model described atoms as the smallest indivisible part of an element.

<h3>What are atomic models?</h3>

Atomic models are models which are used to represent the structure of the atom.

Different scientists put forward different models to represent the atom.

One of the scientists was John Dalton.

The features of Dalton's atomic model includes:

atoms are the smallest particle of elements
atoms are indivisible
atoms of the same element were the same and atoms if different elements differed in all aspects

Therefore, John Dalton’s atomic model described atoms as the smallest indivisible part of an element.

Learn more about atomic models at: brainly.com/question/2193084

#SPJ1

8 0

2 years ago