1. How many moles of carbon are in 2.25 * 10^22 atoms of carbon ?

Chemistry

1 answer:

tresset_1 [31]3 years ago

3 0

Answer:

atoms of C? 2.25 x 1022 atoms C x 1 mole C = 0.037 mol C

Explanation:

How many moles of C are in 2.25 x 1022 atoms of C?

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a scientist is measuring the measuring the temperature change in a chemical compound. the temperature dropped 11 per hr from the

stepladder [879]

Answer:

$\large \boxed{134 \, ^{\circ}\text{C}}$

Explanation:

1. Calculate the temperature drop

$\text{Temperature drop} = \text{4 h} \times \dfrac{11 \,^{\circ}\text{C}}{\text{1 h}} = 44 \,^{\circ}\text{C}$

2. Calculate the original temperature

$\begin{array}{rcl}\text{Final Temperature} & = & \text{original temperature - temperature drop}\\90 ^{\circ}\text{C} & = & \text{original temperature - 44} \, ^{\circ}\text{C}\\\text{Original temperature}& = & \mathbf{134 \, ^{\circ}}\textbf{C}\\\end{array}\\\text{The original temperature was $\large \boxed{\mathbf{134 \, ^{\circ}}\textbf{C}}$}$