alexabdercmur
14.03.2020 •
Mathematics
The table shows the number of yards of ribbon needed to make different numbers of bows.
Bow Making
Number
of Bows Yards of
Ribbon Needed
1 3
2 6
3 9
4 12
Which equation shows the relationship between the number of bows, b, and the number of yards of ribbon needed, r?
r=b+3
r=b−3
r=b×3
r=b÷3
Solved
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Ответ:
i just need points
Step-by-step explanation:
Ответ:
The total cost is 1.25 dollars.
Step-by-step explanation:
The reaction between HCl and CaCO₃ is giving by:
2HCl(aq) + CaCO₃(s) → CaCl₂(aq) + CO₂(g) + H₂O(l) (1)
0.500L M: 100.01g/mol
0.400M
According to equation (1), 2 moles of HCl react with 1 mol of CaCO₃, so to neutralize HCl, we need the next amount of CaCO₃:
The CaCO₃ mass of each tablet is:
Hence, the number of tablets that we need to neutralize the HCl is:
Finally, if every 80 tablets costs 4.00 dollars, 25 tablets will cost:
So, the total cost to neutralize the HCl is 1.25 dollars.
I hope it helps you!