Answer:
True
Explanation:
Hardness is defined as the ability of a substance to resist being scratched. It can be described using Moh's scale
From the given, we can note that the material with hardness 8 has more resistance to being scratched that a material with hardness 7.
This means that if these two substances came in contact, the more hard substance will scratch the less hard substance.
Hope this helps :)
Answer:As temperature increases, reactions take place. Generally, higher temperatures mean faster reaction rates; as molecules move about more quickly, reactant molecules are more likely to interact, forming products.
Explanation:
Hello!
The general chemical reaction for the combustion of a fossil fuel is the following one:
C(s) + O₂(g) → CO₂(g)
Now, we use the following conversion factor to go from kilograms of CO₂ to kilograms of O₂, using the molar masses of each compound and the reaction coefficients:
So, for producing 5*10¹² kg of CO₂,
3,64*10¹² kg of O₂ are required.
Have a nice day!
Answer:
The temperature is 1,532.52 °K= 1,252.37 °C
Explanation:
An ideal gas is a theoretical gas that is considered to be composed of point particles that move randomly and do not interact with each other. Gases in general are ideal when they are at high temperatures and low pressures.
The equation known as the ideal gas equation explains the relationship between the four variables P (Pressure), V (Volume), T (Temperature) and n (Amount of substance) and where R is the molar constant of the gases as follows :
P * V = n * R * T
In this case:
- P= 1920 mmHg
- V= 22,400 mL= 22.4 L (Being 1 L=1,000 mL)
- n= 0.45 moles
- R= 62.36367
Replacing:
1920 mmHg* 22.4 L= 0.45 moles* 62.36367 *T
Solving:
T=1,532.52 °K= 1,252.37 °C (Being 0°C=273.15°K)
<em><u>The temperature is 1,532.52 °K= 1,252.37 °C</u></em>
4.5x10^22.
How many molecules are in 2.10 mol CO2? 1.26x10^24 molecules.
What is the molar mass of AuCl3?