Answer:
1.39 × 10^22 molecules of CO₂
Step-by-step explanation:
We are given;
We are required to calculate the number of molecules of CO₂
1 mole of a compound contains 6.022 × 10^23 molecules
- Thus, we can answer the question;
2.3 × 10^-2 moles will contain;
= 2.3 × 10^-2 moles × (6.022 × 10^23 molecules/mol)
= 1.386 × 10^22 molecules
= 1.39 × 10^22 molecules
Therefore, there are 1.39 × 10^22 molecules of CO₂
Answer:
If you multiply any irrational number by 0, you will get a rational number, 0, as your result.
Answer:
yes
Step-by-step explanation:
3×5×45=365m²
<h3><u>The original price of laptop before the discount is $ 1349</u></h3>
<em><u>Solution:</u></em>
Given that,
Sales price of laptop = $ 944.30
It is on sale for 30% off
To find: Original price of laptop before the discount
Let "x" be the original price of laptop before the discount
From given,
original price = sales price + 30 % of original price
x = 944.30 + 30 % of x
Thus the original price of laptop before the discount is $ 1349
Let us assume the number of children attending the movie = x
Let us also assume the number of adults attending the movie = y
Cost of admission for a children in the movie = $8
Cost of admission of an adult in the movie = $12
Number of people going to the movie on a certain day = 3200
Total amount collected from the movie theater = $33040
Then
x + y = 3200
And
8x + 12y = 33040
2x + 3y = 8260
Let us first take the equation
x + y = 3200
x = 3200 - y
Now we will put the value of x in the equation
2x + 3y = 8260
2(3200 - y) + 3y = 8260
6400 - 2y + 3y = 8260
y = 8260 - 6400
= 1860
Now we will put the value of y from the above deduction in the equation
x + y = 3200
x + 1860 = 3200
x = 3200 - 1860
= 1340
So the number of children going to the movie theater is 1340 and the number of adults going to the movie theater is 1860.