3 years ago

About what percent of US land is within the Mississippi River watershed?

Chemistry

1 answer:

Ad libitum [116K]3 years ago

3 0

I think it is about 60%.

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What is the pressure of a fixed volume of hydrogen gas at 38.8°C if it has a pressure of 1.36 atm at 15.0°C?

Rainbow [258]

Hello There! ^_^

Your question: What is the pressure of a fixed volume of hydrogen gas at 38.8°C if it has a pressure of 1.36 atm at 15.0°C..?

Your answer: P1/ T1= P2/ T2

Change C to Kelvin

273+ C= K

38.3+ 273= 311K

15.0+ 273= 288K

2.38/ 288= P2/ 311.3

740.894= 288 (P2)

P2= 2.57 atm.

Thus, you got you answer!

  Hope this helps!

4 0

3 years ago

How many moles of chloride ions are there in 2.5 L of 5 M magnesium chloride?

castortr0y [4]

Answer:

$n_{Cl^-}=25molCl^-$

Explanation:

Hello,

In this case, since the given 5-M concentration of magnesium chloride is expressed as:

$5\frac{molMgCl_2}{L}$

We can notice that one mole of salt contains two moles of chloride ions as the subscript of chlorine is two, in such a way, with the volume of solution we obtain the moles of chloride ions as shown below:

$n_{Cl^-}=5\frac{molMgCl_2}{L}*\frac{2molCl^-}{1molMgCl_2} *2.5L\\\\n_{Cl^-}=25molCl^-$