*need answer stat*
when a potassium atom forms an ion, it loses one electron. what is the electrical charge of the potassium ion?
a.-2
b. -1
c.+2
d.+1

Isla’s change in velocity is 30 m/s, and hazel has the same change in velocity. which best explains why they would have different accelerations? isla had negative acceleration, and hazel had positive. isla had a different time than hazel. isla had positive acceleration, and hazel had negative. isla went a farther distance than hazel.

Waves that cause the most damage during an earthquake are a. surface waves c. s waves b. p waves d. ocean waves

5g of ammonium nitrate was dissolved in 60g of water in an insulated container. the temperature at the start of the reaction was 23.0°c and at the end it was 19.0°c. calculate the energy absorbed by the reaction.