2 years ago

Which substance is the most soluble at 60 degrees Celsius? How do you know?

Chemistry

1 answer:

Sonja [21]2 years ago

3 0

Answer:

NH4CL is the answer

Explanation:

Hope it helps you

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Which statement best describes the liquid state of matter?

Andrei [34K]

Answer:

There are no acceptable descriptions at all on that list of choices.

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3 years ago

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A equilibrium is the state in which the rate of the forward reaction is _______________ the rate of the reverse reaction.

mrs_skeptik [129]

I believe the blank is (equal).

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2 years ago

1) A light bulb takes in 30 of energy per second. It transfers 3j as use

natta225 [31]

Answer:

$\boxed{\text{10 \%}}$

Explanation:

The formula for efficiency is

$\begin{array}{rcl}\text{Efficiency} & = & \dfrac{\text{useful energy out}}{\text{energy in}} \times 100 \,\% \\\\\eta & = & \dfrac{w_{\text{out}}}{w_{\text{in}} } \times 100 \,\%\\\end{array}$

Data:

Useful energy = 3 J

Energy input = 30 J

Calculation:

$\begin{array}{rcl}\eta & = & \dfrac{\text{3 J}}{\text{30 J}} \times 100 \,\%\\\\\eta & = & 10 \, \%\\\end{array}\\\text{ The efficiency is }\boxed{\textbf{10 \%}}$