The molar mass of K is 39, Cr is 52, and O is 16. The rough calculation of these numbers are 294.
Answer: The correct option is B.
Explanation: To describe the motion of an object, we use the equations of motion.
From the above equations, we require position, speed and direction through which we an calculate the displacement, velocity and acceleration.
To calculate the complete motion of an object, we require all the three factors.
Hence, the correct option is B.
Strontium (Sr) lies in the second group of the periodic table, which means it has two valence shell electrons so it forms the Sr⁺² ion. Meanwhile, bromine (Br) has seven valence shell electrons, which means it forms the Br⁻ ion. Each strontium atom is therefore able to donate electrons to two bromine atoms. So the ratio of the ions in neutral strontium bromate (SrBr₂) will be 1 : 2.
Answer:
A
Explanation:
because chemical change is permanet.