mr. Rose asked his student to draw a quadrilateral with four unequal sides. An example of this kind of quadrilateral

Chemistry

1 answer:

777dan777 [17]2 years ago

8 0

Think of w shape with 4 sides the shape I know tat is Quadrilateral is a square

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Which of these describes an endothermic process?

Phoenix [80]

The third one down: "When barium hydroxide is mixed with ammonium chloride, ice crystals form on the outside of the container."

This is because an endothermic reaction [process] takes in more energy than it releases. Therefore because a decrease in energy leads to a decrease in temperature, the ice crystals forming show that it must be a endothermic reaction [process].

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AJ

3 0

3 years ago

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A solution is prepared by adding 0.0231moles of H3O+ ions to 3.33L of water. What is the pH of this solution

MrMuchimi

Answer:

2.15

Explanation:

For this question, we have to remember the pH formula:

$pH~=~-Log[H_3O^+]$

By definition, the pH value is calculated when we do the -Log of the concentration of the hydronium ions ( $H_3O^+$ ). So, the next step is the calculation of the concentration of the hydronium ions. For this, we have to use the molarity formula: