Other Chemistry Answers

What is important about 2,8,8?

8. The following order for caffeine citrate was ordered for a 4 pound neonate in the NICU.
Caffeine citrate 10 mg/ml
20 mg/kg bolus x 1, then 5 mg/kg/day
The technician compounded the solution of caffeine citrate and filled the syringe for the bolus dose with 360 mg and the syringe for the next dose, 90 mg, to be placed in the unit dose cabinet for a later delivery. The syringes were checked by the pharmacist and sent to the NICU. After the bolus dose the neonate was found to have tachycardia and started to seize. Lab tests determined that the neonate had a high serum caffeine level. What should the bolus dose have been? How many milliliters of the preparation should be drawn up?
The concentration of 10 g caffeine base and 10 g of citric acid are to be mixed with 1 L of sterile water. Remember to perform all of your conversions and calculate what the correct dose should have been for the bolus dose. (What is the bolus dose?)

A 50.0 % kg mixture of salt and water is 15.0 % (by mass) salt. Give the mass of salt and water in the mixture. I took 50.o x 15.0 then divided by 100 and got 7.5. Then I subtracted 7.5 from 100 and got 92.5. I would appreciate the help. I am confused.

For the reaction
?CH4+?Cl2 !?CCl4+?HCl ,
what is the maximum amount of CCl4
(153.823 g/mol) which could be formed from
13.79 g of CH4 (16.0425 g/mol) and 11.41 g
of Cl2 (70.906 g/mol)?
Answer in units of g

For the reaction
Zn + 2HCl ! ZnCl2 + H2 ,
what is the maximum amount of ZnCl2 which
could be formed from 10.58 g of Zn and 10.9 g
of HCl?
Answer in units of g

Zn+2HCI yields ZnCI2+H2

What mass of water contains 42.0g of oxygen?

In the year 2007, an estimated amount of 31 billion tons of carbon dioxide (CO2) was emitted worldwide due to fossil fuel combustion and cement production. Express this mass of CO2 in grams without exponential notation, using an appropriate metric prefix.

A solution contains 50g/dm3 of impure sodium hydroxide. 25cm3 of it got neutralised by 14cm3 of sulfuric acid. Sulfuric acid = 1mol/dm3
H2SO4+2NaOH = Na2SO4+2H2O
-No. Of moles of sulfuric acid present in 14cm3 of the solution.
-Concentration of sodium hydroxide
-Percentage purity of sodium hydroxide.

1) Calculate the mass of calcium oxide residue gotten when 82g of calcium carbonate is heated to a steady mass.

2)Calculate the volume hydrogen produced when 6g of magnesium reacts with excess dilute hydrochloric acid at s.t.p