All categories

3 years ago

1. Antoine Lavoisier, a French scientist, established which principle?

Chemistry

1 answer:

pickupchik [31]3 years ago

6 0

Answer: The correct option is d.

Explanation: Antoine Lavoisier is a french scientist who discovered the role of oxygen in the process of combustion and respiration.

He was famous for the law of conservation of mass.

This law states that the total mass the reactant will equal to the total mass of the products in a chemical reaction.

For example: Combustion of methane

$CH_4+2O_2\rightarrow CO_2+2H_2O$

Mass of the reactants = $[12+4(1)]+[2(32)]=80g/mol$

Mass of the products = $[12+2(16)]+2[2(1)+16]=80g/mol$

Hence, every chemical reaction will follow law of conservation of mass.

You might be interested in

A solution prepared by dissolving 0.100 mole of propionic acid in enough water to make 1.00 L of solution is observed to have a

torisob [31]

Answer:

C) $k_a=1.3\times 10^{-5}$

Explanation:

pH is defined as the negative logarithm of the concentration of hydrogen ions.

Thus,

pH = - log [H⁺]

The expression of the pH of the calculation of weak acid is:-

$pH=-log(\sqrt{k_a\times C})$

Where, C is the concentration = 0.5 M

Given, pH = 2.94

Moles = 0.100 moles

Volume = 1.00 L

So, $Molarity=\frac{Moles}{Volume}=\frac{0.100}{1.00}\ M=0.100\ M$

C = 0.100 M

$2.94=-log(\sqrt{k_a\times 0.100})$

$\log _{10}\left(\sqrt{k_a0.1}\right)=-2.94$

$\sqrt{0.1}\sqrt{k_a}=\frac{1}{10^{2.94}}$

$k_a=1.3\times 10^{-5}$

4 0

3 years ago

WILL GIVE THANKS,STARTS AND BRANLIEST!!!!! PLEASE COME LOOK! SHARE YOUR SMARTNESS!!!! PLSSSSS AT LEAST COME TAKE A LOOK! ANSWER

madreJ [45]

Answer:

B) The group the atom is located

C) There needs to be 2 Na atoms and 1O atom to form Na2O

6 0

3 years ago

Read 2 more answers

Which statement about uncouplers is NOT true? A. They allow ATP synthesis with no electron transport. B. They allow electron tra

Arturiano [62]

Answer: the statement that is wrong about uncouplers is option A ( they allow ATP synthesis with no electron transport).

Explanation:

An uncoupler is a molecule that disrupts oxidative phosphorylation by dissociating the reactions of ATP synthesis from the electron transport chain. They allow electron transport without ATP synthesis. Their mechanism of action is basically to transport protons back into the matrix, preventing the required buildup of charge on the other side.

2,4-DNP is an example of an uncoupler.

5 0

4 years ago

Why h2o has higher boiling point than nh3

Hoochie [10]

Answer:

H2O molecules are thus able to form an average of 4 H-bonds. H2O has a higher boiling point than NH3 because (i) the H-bonds are stronger and (ii) it contains twice as many H-bonds. H2O has a higher boiling point than HF because it contains twice as many H- bonds, despite these being individually weaker.

Explanation:

hope this is helpful

4 0

3 years ago

Where else have you heard the term conversation? How does that term’s meaning in that other context relate to its meaning in che

Mrac [35]

I have no skins for you my brother and my girlfriend and my uncle are going out and have you come on the house for me to do you have to get on your phone

7 0

4 years ago