Is this equation endothermic or exothermic? How do you know?

2NaCl + 822 kJ - -> 2Na + Cl2

Although si is an insulator then how does it behave as semiconductor upon heating

A scientist develops a new idea based on her observations of nature. What should she do next? A think of a way to test the idea B claim that she has discovered a new theory C look only for evidence that supports the idea D reject any evidence that

How does exercise affect the balance of salt and water Im your body?

Around the turn of the twentieth century, inventor Robert Shuman was engineering products that used energy directly from the Sun to power motors and farms.

How do you make glue from jack fruit sap?

Considering the following precipitation reaction: Pb (NO3) 2 (aq) + 2KI (aq) → PbI2 (s) + 2KNO3 (aq) Which ion would NOT be present in the complete ionic equation?

What does the symbol C p stand for?

Which of the following is not true of science? 1. Science offers proof of a claim 2. Science is a way of knowing 3. Science is a process 4. Science provides support or fails to provide support to claim

What happens to the velocity of a sound wave in air if the temperature of the air increases

Determine the [oh-] concentration of a 0.741 m koh solution at 25°c.