If it's calcium then it will foam up if you put straight muriatic acid on it. this wont hurt the tile. however be careful as muriatic acid can be dangerous stuff.
You can determine whether a spicule is calcareous or siliceous by performing a simple reactivity test: immerse the spicule in dilute hydrochloric acid (HCl). If it fizzes and dissolves, the spicule is likely calcareous (made of calcium carbonate). If there is no reaction, the spicule is likely siliceous (made of silica).
Take a simple random sample.
A simple blood test can determine whether or not you have hepatitis B.
The simple subject is deposit. The simple predicate is is called.
That will depend on the interest rate and whether it is simple or compound interest.
Benedict's solution
true
because it is a simple phage, DNA surrounded by a protein coat
Short and simple. Acid
The formula for simple (ordinary) interest on a bank deposit is Deposit Amount x Rate x Time (# of days) on Deposit.
no !
Short and simple. Acid