Answer:
because its not international language
Explanation:
because its not international language like English
At STP, pure ethanol has density 0.789g/mL. 25 mL will have mass 25 (mL) * 0.789 (g/mL)=19.725 g. Round this to 19.7g for three significant figures.
(not fully sure if this is correct)
Answer:
Nuclear
Explanation:
The material most often used in nuclear power plants is the element uranium. Although uranium is found in rocks all over the world, nuclear power plants usually use a very rare type of uranium, U-235. Uranium is a non-renewable resource. ... Nuclear power plants do not pollute the air or emit greenhouse gases.
Answer:
Alkaline earth metals
Explanation:
Calcium (Ca) is a silvery-white soft metal that has the atomic number 20 in the periodic table. It is an Alkaline Earth Metal and is located in Group 2 of the periodic table. It has the symbol Ca.
The atomic size trend in the periodic table is increasing from right to left and from top to bottom. Hence when comparing a chlorine atom and a sodium atom, it is seen that chlorine is seen on the far left side of the periodic table while sodium is seen on the far right side. This means sodium is thus greater in atomic size than a chlorine atom.
