Answer is: d. increases.
The velocity of sound in seawater changes with water pressure, depth, temperature and salinity.
Velocity can be calculeted using Del Grosso's equation, the UNESCO equation (International Standard algorithm) or Mackenzie equation.
To measure velocity navy use Expendable Bathy Thermograph.

7 0

3 years ago

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What is the volume, in liters, of 6.8 mol of Kr gas at STP?

Virty [35]

Answer:

$\boxed {\boxed {\sf D. \ 152 \ L}}$

Explanation:

Any gas at standard temperature and pressure (STP) has a volume of 22.4 liters per mole or 22.4 L/mol. We can create a proportion with this value.

$\frac {22.4 \ L \ Kr}{1 \ mol \ Kr}$

Multiply both sides of the equation by 6.8 moles of krypton.

$6.8 \ mol \ Kr *\frac {22.4 \ L \ Kr}{1 \ mol \ Kr}$

The units of moles of krypton will cancel.

$6.8 *\frac {22.4 \ L \ Kr}{1 }$

The denominator of 1 can be ignored, so this becomes a simple multiplication problem.

$68 * 22.4 \ L \ Kr$

$152.32 \ L \ Kr$

If we round to the nearest whole number, the 3 in the tenths place tells us to leave the 2 in the ones place.

$152 \ L \ Kr$

6.8 moles of krypton gas at standard temperature and pressure is equal to 152 liters.

6 0

3 years ago

Which substance has a chemical formula with the same ratio of metal ions to nonmetal ions as in potassium sulfide?

pav-90 [236]

Answer=1

Potassium Sulfide= K2S (two metals, one non metal)

Sodium Oxide=Na2O (two metals. one nonmetal)

Sodium Chloride=NaCl (one metal, one nonmetal)

Magnesium Oxide=MgO (one metal, one nonmetal)

Magnesium Chloride=MgCl2 (one metal, two nonmetals)

6 0

3 years ago

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