2 years ago

Why is elemental zinc considered a pure substance?

1 answer:

7 0

Answer: C... Because Zinc is made of only one type of atoms.

Explanation: All elements are made of one type of atom. Pure gold is made out of only gold atoms, silver out of only silver atoms, etc.

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What would happen if the number of protons were to change in an atom?

Shalnov [3]

Answer: you will change the atom from one element to a different element. Sometimes, when you add a proton to an element, the element will become radioactive. If you change the number of neutrons in an atom, you get an isotope of the same element.

Explanation:

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2 years ago

Plz help which this it is the digestive system

myrzilka [38]

I honestly have no clue on this one

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2 years ago

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How many moles of Al2O3 can be formed from 10.0 g of Al?

Nutka1998 [239]

Answer:

n Al= 10/27( mol)- >n Al2O 3 =5/27(mol)

Explanation:

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2 years ago

An order is given to administer 57 g of lactulose syrup, often used for treating complications of liver disease. The suspension

Angelina_Jolie [31]

Answer : The volume given to the patient should be, 85.5 mL

Explanation :

As we are given that the suspension contains 10g/15mL.

Now we have to determine the volume should be given to the patient.

As, 10 grams of lactulose syrup needed 15 mL volume of solution

So, 57 grams of lactulose syrup needed $\frac{57g}{10g}\times 15mL=85.5mL$ volume of solution

Thus, the volume given to the patient should be, 85.5 mL

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2 years ago

A small motor does 4000 J of work in 20 s. What is the power of the motor in watts?

TEA [102]

Answer:

200 W

Explanation:

Formula of Power is

P= W/T

where

W= Work and T= Time

4000/20 = 200J/s or 200 W

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2 years ago