(BRAINLIEST QUEATION) Amelia wants to check whether blood is acidic or basic not only that she wants to find its approximate PH. Which of these indicators will she use?
Methyl orange
Litmus paper
pH meter
Thymolphthalein

Which of the following electromagnetic waves can create ions?

For a research project, a student decided to test the effect of the lead(ii) ion (pb2+) on the ability of salmon eggs to hatch. this ion was obtainable from the water‐soluble salt, lead(ii) nitrate, which the student decided to make by the following reaction. pbo(s) + 2 hno3(aq) → pb(no3)2(aq) + h2o losses of product for various reasons were expected, and a yield of 86.0% was expected. in order to have 5.00 g of product at this yield, how many grams of pbo should be reacted? (assume that sufficient nitric acid, hno3, would be used.)

At element makes up all organic compounds?