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igor_vitrenko [27]
3 years ago
10

19. Give the meaning of each of the following symbols when used in a chemical equation.

Chemistry
1 answer:
larisa86 [58]3 years ago
3 0
This doesnt make sense can you upload a picture for me so i can understand the question?
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You need 4.0 ounces of a steroid ointment. if there are 16 oz in 1 lb, how many grams of ointment does the pharmacist need to pr
Bond [772]

The given units are the units of masses which are interconvertable.

It is given that:

1 lb = 16 oz

Now, converting kg to lb:

Since, 1 kg = 2.20462 lb

So, \frac{0.0625 lb}{1 oz}\times \frac{1 kg}{2.20462 lb}

Now converting kg to g:

Since, 1 kg = 1000 g

So, \frac{0.0625 lb}{1 oz}\times \frac{1 kg}{2.20462 lb}\times \frac{1000 g}{1 kg} = 28.349 \frac{g}{oz}

For 4 oz:

28.349\frac{g}{oz} \times 4 oz = 113.396 g

Thus, 113.396 g of ointment needed to be prepared by the pharmacist.


6 0
3 years ago
Force exerted on a lever is applied on the<br> lever's
Cerrena [4.2K]
A force called the effort force is applied at one point on the lever in order to move an object, known as the resistance force, located at some other point on the lever
7 0
3 years ago
a radiator is filled with a mixture of 3.25kg ethylene glycol (C2H6O2) in 7.75kg of water. calculate the molality of this questi
Vladimir [108]
3.25 kg in g = 3.25 * 1000 = 3250 g

Molar mass C₂H₆O₂ =  62.0 g/mol

Mass solvent = 7.75 kg

Number of moles:

n = mass solute / molar mass

n = 3250  / 62.0 

n = 52.419 moles

Molality = moles of solute / kilograms of solvent

M = 52.419 / 7.75

M = 6.7637 mol/kg

hope this helps!
5 0
3 years ago
Reaction rate is increased by an increase in kinetic energy
marta [7]

Answer:

Reaction rate is increased by an increase in kinetic energy

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is _temperature_

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A . Collision theory

B . Surface Area

C . Temperature

D. Concentration

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2 years ago
The Tacoma narrows bridge collapsed due to?
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Explanation: aeroflastic flutter

8 0
4 years ago
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