the any four ways in which a chemical equipment can be more informative are 1 colour change2 change of temperature 3 evolution of gas 4 production of n odar
Explanation:
if the answer is correct mark me as brain list
Answer;
4.5 m³
Solution:
The statement says that two blocks are present on a lid of a container with volume of 9 m³. The mass of lid is equal to the mass of two blocks. It means that initially there are four blocks (or four atm pressure) upon 9 m³ volume.
After that four more blocks are placed on the lid. Means the pressure is increased from 4 atm to 8 atm (2 atm of lid, 2 atm of old blocks, 4 atm of new four blocks).
So, Data generated is,
P₁ = 4 atm
V₁ = 9 m³
P₂ = 8 atm
V₂ = ?
According to Boyle's Law,
P₁ V₁ = P₂ V₂
Solving for V₂,
V₂ = P₁ V₁ / P₂
Putting values,
V₂ = (4 atm × 9 m³) ÷ 8 atm
V₂ = 4.5 m³
Explanation:
B. 1.00 x 10^-2 M HCI
The question is asking us to find the molarity/concentration of the acid (HCl).
We have been provided with;
- 20.0 mL of 5.0 x 10^-³ M NaOH
- 10.0 mL of HCl
We know that molarity (M) of a solution is contained in 1 L or 1000 mL or 1000 cm³.
This means that;
5.0 x 10^-³ moles is contained in 1000 mL.
is contained in 1000 mL.X mol is contained in 20.0 mL
![x \: mol \: = \frac{20 \times 5.0 \times {10}^{ - 3} }{1000} \\ = 0.0001 \: mol](https://tex.z-dn.net/?f=x%20%5C%3A%20mol%20%5C%3A%20%20%3D%20%20%5Cfrac%7B20%20%5Ctimes%205.0%20%5Ctimes%20%20%7B10%7D%5E%7B%20-%203%7D%20%7D%7B1000%7D%20%20%5C%5C%20%20%3D%200.0001%20%5C%3A%20mol)
= 0.0001 moles
These 0.0001 moles is contained in 10 mL of HCl.
To find the molarity of the acid;
0.0001 moles is contained in 10 mL
x mol is contained in 1000 mL
![x \: mol \: = \frac{0.0001 \times 1000}{10} \\ = 0.01 \: mol](https://tex.z-dn.net/?f=x%20%5C%3A%20mol%20%5C%3A%20%20%3D%20%20%5Cfrac%7B0.0001%20%5Ctimes%201000%7D%7B10%7D%20%20%5C%5C%20%20%3D%200.01%20%5C%3A%20mol)
= 0.01 M
Therefore the Concentration of the acid (HCl) is 0.01 M or 1.0 x 10^-2 M
Answer:
The answer is "
"
Explanation:
When
is added in the chemical equation it reacts with sodium acetate so, it will give the following chemical equation:
In this, the
is a weak acid so, it not completely dissociated.
were strong electrolytes they are completely dissociated.
The
is a strong acid so, it is completely dissociated So, the net ionic equation is:
![CH_3COO^{-} \ (aq) + H^{+}\ (aq) \longrightarrow CH_3COOH \ (aq)](https://tex.z-dn.net/?f=CH_3COO%5E%7B-%7D%20%5C%20%28aq%29%20%2B%20H%5E%7B%2B%7D%5C%20%28aq%29%20%5Clongrightarrow%20CH_3COOH%20%5C%20%28aq%29)
There are 5.35 × 10²⁴ atoms in 8.89 moles of Helium.
<u>Explanation:</u>
Given that number of moles of Helium = 8.89 moles
Moles and Avogadro's number are related to each other by multiplying those two we can convert moles into atoms, molecules and Particles .
We have to convert the moles into atoms by multiplying the molar amount by Avogadro's number as,
Number of atoms = 8.89 × 6.022 × 10²³ atoms
= 5.35 × 10²⁴ atoms
So there are 5.35 × 10²⁴ atoms in 8.89 moles of Helium.