Answer:
okay so, 20 Ca goes to group 2A and the chemical group family is alkaline earth metal family
54 Xe goes to group 8A the chemical group family is the noble gas family
37 Rb goes to group 1A the chemical group family is alkali metal family
17 Cl goes to group 7A the chemical group family is the halogen family
Explanation:
Answer:
Catalyst work as an agent where,
Catalyst increases or decreases the rate of chemical reaction.
First, we need the balanced equation: H₂ + Cl₂ ---> 2HCl
since not much information is given, I am assuming we are at STP and that 22.4 Liters= 1 mol
1) let's convert the volume to moles using the molar volume of a gas. also we need to convert the cm₃ to mL, then to Liters.
8 cm³ (1 ml/ 1 cm³)(1 L/ 1000 mL) (1 mol/ 22.4 Liters)= 3.6x10⁻⁴ moles of H₂
2) let's use the mole ratio of the balanced equation to convert moles of H₂ to moles of HCl
3.6x10⁻⁴ mol H₂ (2 mol HCl/ 1 mol H₂)= 7.1x10⁻⁴ mol HCl
3) lastly, we convert the moles of HCl to grams using the molar mass.
molar mass of HCl= 1.01 + 35.5= 36.51 g/mol
7.1x10⁻⁴ mol HCl (36.51 g/mol)=<span> 0.026 grams HCl</span>
False people can do whatever they want without people telling them what to do.
The answer is - D. are constantly in motion
These plates move back and forth and sometimes even end up going one above other
