3 years ago

Which of the following is soluble in water?

Chemistry

1 answer:

Nina [5.8K]3 years ago

8 0

I hope this answers helps it’s D

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Thermal energy is measurement of what type of molecular energy? *

Rama09 [41]

Answer:

Kinetic energy!

Explanation:

It measures the average kinetic energy of the molecules of a substance in degrees Fahrenheit (F) or Celsius (C).

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3 years ago

If a star is 300 light years away from Earth, how long does it take light from that star to reach Earth?

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3 years ago

A gas has a volume of 590 mL at temperature of -55.0 C. What volume will the gas occupy at 30.0 C show your work

DENIUS [597]

Data:
$V_{initial} = 590\:mL$
$T_{initial} = -55.0^0C$
converting to Kelvin
TK = TC + 273
TK = -55.0 + 273 → TK = 218.0 → $T_{initial} = 218.0\:K$
$V_{final} = ? (in\:milliliters)$
$T_{final} = 30.0^0C$
TK = TC + 273
TK = 30.0 + 273 → TK = 303.0 → $T_{final} = 303.0\:K$

By the first Law of Charles and Gay-Lussac, we have:
$\frac{ V_{i} }{ T_{i} } = \frac{ V_{f} }{ T_{f} }$

Solving:
$\frac{ V_{i} }{ T_{i} } = \frac{ V_{f} }{ T_{f} }$
$\frac{ 590 }{ 218.0 } = \frac{ V_{f} }{ 303.0 }$
Product of extremes equals product of means:
$218.0* V_{f} = 590*303.0$
$218.0 V_{f} = 178770$
$V_{f} = \frac{178770}{218.0}$
$\boxed{\boxed{V_{f} \approx 820.04\:mL}}\end{array}}\qquad\quad\checkmark$

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The electronic configuration is for iron (Fe) because if you add all those power up it will give you 26 and it’s the atomic number of Fe

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Suppose that a substance in a beaker is heated over a burner in a science lab. Which observation would most likely indicate that

victus00 [196]

Answer:

Explanation:

the production of an odor would indicate that the heat ignited a chemical reaction