What is the evidence of a chemical reaction when the fireworks go off

Which daughter element is produced from the beta decay of 89/36 kr

Which best describes how the sun rotates? O A. The sun rotates once each year. O B. The sun rotates every 11 years. O c. The sun rotates more slowly at its poles. O D. The sun does not rotate.

Elements in the halogen group are a. very reactive b. have seven electrons in the outer shell c. react to form salts d. all of the above

best way to dry a food thermometer

How is gamma radiation different from other types of electromagnetic radiation

Sound waves travel fastest through? A.) Air B.) Steel C.) Water D.) Vacuum

Which of the following combinations will result in a reaction that is never spontaneous? 1) positive enthalpy change and positive entropy change 2) positive enthalpy change and negative entropy change 3) negative enthalpy change and positive entropy

Which of the formed elements is present in the greatest concentration?

A compound has a percent composition of 24.74% potassium (molar mass = 39.10 g/mol), 34.76% manganese (molar mass = 54.94 g/mol), and 40.50% oxygen (molar mass = 16.00 g/mol).

What would be the saturation concentration (mole/L) of oxygen (O2) in a river in winter when the air temperature is 0°C if the Henry's law constant at this temperature is 2.28 * 10-3 mole/L-atm? What would the answer be in units of mg/L?