Your answer should be B :)
Answer:
Two cinder blocks 6 centimeters apart
Explanation:
im not 100% certain but the 2 cinder blocks are more dense than the other options
sry if its wrong
<span>Lead is most commonly used for protecting people from radioactive substances. </span>
This is not the proper equation, the equation should be:
Cl2 + H2 ----> 2HCl
This does not happen at room temperature and needs a source of activation energy such a spark.