Several 100 if not thousands
Formula 1 racing will exist as long as the International Automobile Federation can turn a profit with the series. Since it is now very profitable, expect Formula 1 racing to exist for many years.
Many lipases exist, each with a different formula ! Please wrtite the complet and correct name of your lipase.
Glass is a silicate; many types of glass exist, with very different composition.
The grapefruit juice is a mixture of many compounds; a unique chemical formula doesn't exist; for more details see the link below.
mines have one shaft
If you are a tourist in U.S.A, you can stay the time that is stated on your Visa.
Ammonium hydroxide does not technically exist as molecules, but its formula unit is NH4OH, which has five atoms of hydrogen in each formula unit.
The answer will depend on the size of the screws!
one which is screws
Here exist: 1 ion Mg+ and ion (CO3)-.
about 500 hundred
Positive numbers were originally invented so that we could tell how much we have of something. For example, how many arrow shafts do we have, and how many stone arrowheads do we have to put on our arrow shafts? By answering those questions we can tell whether we need to make more shafts, or more heads. It's very practical.