2 years ago

Hey! Can someone please help me out?

Chemistry

1 answer:

sertanlavr [38]2 years ago

7 0

Answer:

the answer is b

Explanation:

convection is caused by density differences whereby warm air with less density rise above a heater and sink near a cold wind.

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Explain why you can't just make gold out of a random yellow substance like straw or urine.

Yuri [45]

Answer:

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2 years ago

If solid water is dropped into liquid water, will the solid iron sink or float?

vivado [14]

Answer:

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2 years ago

Read 2 more answers

1. A sample of gas has an initial volume of 25 L and an initial pressure of 123.5 kPa. If the pressure changes to

sveta [45]

Answer:

$\large \boxed{\text{17.mL}}$

Explanation:

The temperature and amount of gas are constant, so we can use Boyle’s Law.

$p_{1}V_{1} = p_{2}V_{2}$

Data:

$\begin{array}{rcrrcl}p_{1}& =& \text{123.5 kPa}\qquad & V_{1} &= & \text{25 L} \\p_{2}& =& \text{179.9 kPa}\qquad & V_{2} &= & ?\\\end{array}$

Calculations:

$\begin{array}{rcl}123.5 \times 25 & =& 179.9V_{2}\\3088 & = & 179.9V_{2}\\V_{2} & = &\dfrac{3088}{179.9}\\\\& = &\textbf{17 L}\\\end{array}\\\text{The new volume of the gas is } \large \boxed{\textbf{17 L}}$