See the reference image for the chemical equation for the reaction you just observed. What do you think each side of the equatio
n represents? What do the symbols in the equation represent? Be prepared to share your thoughts with a partner.
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1 answer:
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Answer :
The correct answer is for mass of Na₃PO₄ 39.7 g.
Given : 1) Molarity of Na⁺ ions = 1.00 M or 1.00
2) Volume of solution = 725 mL
Converting volume of solution from mL to L :
Conversion factor : 1 L = 1000 mL
Volume of solution = 0.725 L
Following steps can be done to find mass of :
<u>Step 1 : Write the dissociation reaction of Na₃PO₄ .</u>
<u>Step 2: Find moles of Na⁺ ions : </u>
Mole of Na⁺ ions can be calculated using molarity formula which is :
Plugging value of Molarity and volume
Multiplying both side by 0.725 L
<em>Mole of Na⁺ ions = 0.725 mol</em>
<u>Step 3: Find mole ratio of Na₃PO₄ : Na⁺ :</u>
Mole ratio is found from coefficients from balanced reaction as:
Mole of Na₃PO₄ in balanced reaction = 1
Mole of Na⁺ ion = 3
<em>Hence mole ratio of Na₃PO₄: Na⁺ = 1 : 3 </em>
<u>Step 4 : To find mole of Na₃PO₄ </u>
Mole of Na₃PO₄ can be calculated using mole of Na⁺ ion and Mole ratio as :
<em>Mole of Na₃PO₄ = 0.242 mol </em>
<u>Step 5 : To find mass of Na₃PO₄</u>
Mole of Na₃PO₄ can be converted to mass of Na₃PO₄ using molar mass of Na₃PO₄ as :
Mass of Na₃PO₄ = 39.619 g
<u>Step 6 : To round off mass of Na₃PO₄ to correct sig fig .</u>
The sig fig in 750 mL and 1.00 M is 3 . So mass of Na₃PO₄ can rounded to 3 sig fig as :
Mass of Na₃PO₄ = 39.7 g
Answer : The speed in miles per hour is 22 mile/hr.
The speed in yard per min is 26617.8 yard/min
Explanation :
The conversion used for meters to miles is:
The conversion used for second to hour is:
The conversion used for meter per second to mile per hour is:
As we are given the speed of 407.0 meter per second. Now we have to determine the speed in miles per hour.
So,
Therefore, the speed in miles per hour is 22 mile/hr.
The conversion used for meter to yard
1m = 1.09 yard
The conversion used for second to hour is:
The conversion used for meter per second to mile per hour is:
As we are given the speed of 407.0 meter per second. Now we have to determine the speed in yards per min
So,
Therefore, the speed in yard per min is 26617.8 yard/min