When calcium metal (Ca) reacts with oxygen gas (O2), it produces the ionic compound calcium oxide (CaO). Write the balanced equa
1 answer:
Step-by-step explanation:
Hey there! Down here :D
Now , let's balance it by Multiplying 2 on Calcium Side.
Is the Required Equation.
Hope it helps :)
<h3>Redox Reaction: Is it?</h3>Yes, this is because:-
- Here, Calcium acts as Reducing Agent
- And Oxygen is oxidizing agent.
- And also, Cao gets oxidized.
It is also a Combination reaction.
- Here A is Calcium
- Here B is Oxygen.
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Answer:
279,936 ways
Step-by-step explanation:
Every day the student has to chose a sandwich from the pile of 6 sandwiches. So this means the student has to make a choice from the 6 sandwiches for the 7 days. Since the order matters, this is a problem of permutations.
Daily the student has the option to chose from 6 sandwiches. So this means, for 7 days, he has to make a choice out of 6 options. Or in other words we can say, the student has to make selection from 6 objects 7 times.
So, the total number of ways to chose the sandwiches will be 6 x 6 x 6 x 6 x 6 x 6 x 6 =
Alternate Method:
Since the repetition can occur in this case, i.e. a sandwich chosen on one day can also be chosen on other day, the following formula of permutations ca be used:
Number of ways =
where n is the total number of choices available which is 6 in this case and r is the number of times the selection is to be made which 7 in this case. So,
The number of ways to chose a sandwich will be = ways