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2 years ago

Calculate the mass of NaOH in 0.2 moles of NaOH

Mathematics

1 answer:

masya89 [10]2 years ago

6 0

Answer:

0.2M i.e

Step-by-step explanation:

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Kevin is 333 times as old as Daniel. 444 years ago, Kevin was 555 times as old as Daniel. How old is Kevin now?

My name is Ann [436]

Let D be Daniel's present age, then we can represent Kevin's present age as 3D because Kevin is 3 times as old as Daniel.

We can write an expression for Daniel's age 4 years ago as D-4 and Kevin's age 4 years ago as 3D-4.

We are told that 4 years ago Kevin was 5 times as old as Daniel. We can write this information as:

$3D-4=5\cdot(D-4)$

Now let us solve our equation to find Daniel's present age.

$3D-4=5D-20$

$-4+20=5D-3D$

$16=2D$

$D=\frac{16}{2}=8$

Daniel's present age is 8 years. Now we will multiply 8 by 3 to get Kevin's present age as Kevin is 3 times old as Daniel.

$\text{Kevin's present age}=8\cdot3=24$

Therefore, Kevin is 24 years old now.

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2 years ago

Projectile motion is a combination of which two types of motion?

klasskru [66]

Vertical Free Fall and Constant Horizontal Motion.

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3 years ago

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F(x) = -22<br> - 4x – 19<br> Find f(-9)

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Answer:the answer is -5

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Explain how two amounts of change can be the same but the percentage of change can be different

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The change from 10 to 11 or from 100 to 101 is 1 in each case.

In the first case, the percentage of change is 1/10 = 10%.

In the second case, the percentage of change is 1/100 = 1%.

The percentages of change are different because the bases from which the change is measure are different.

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