Concentrated hcl is 98% and has density of 1.46g/cm3 what volume of concentrated acid required to make 2l of 0.25M of hcl.?

Ants live on acacia trees in south america. the ants feed on sugars secreted by the trees. the trees provide room for the ants to live. the ants sting any other insect or animal that comes to eat the trees. what type of relationship is this?

1) a light bulb takes in 30 of energy per second. it transfers 3j as use energy. calculate the efficiency. second. it transfers 3j as useful light energy and 27j as heat energy. calculate the efficiency

Are the results of a thoroughly tested hypothesis?