If one uses an analytical balance to measure out a small quantity of reagent, and the mass is 0.0256 g, then how many significant figures are present?

When one atom of carbon (C) combines with four atoms of hydrogen (H), four nonpolar covalent bonds form, resulting in a molecule of methane (CH4).

A sample of raw mining ore contains a hydrated salt called copper sulfate tetrahydrate, CuSO4.4H2O, along with other impurities. If 10.854g of the ore loses 2.994g of water when heated strongly, what is the mass percentage of the salt CuSO4.

What types of properties are used to describe matter

Genetic diversity is crucial to a species chance of survival over generations true or false?

What can a drop of mercury be described as?

The volume of 1 mole of o2 gas at T=273k P=1atm is? A 6.02 x 10^-23 ml B 760 L C 22.4 L D 2.24 L E 224 L

There are two stable isotopes of bromine. Their masses are 78.9183 and 80.9163 amu. If the average atomic mass of bromine is 79.9091 amu, what is the natural abundance of the heavier isotope? percent abundance of 81Br __%

If 1.00 mol of argon is placed in a 0.500-L container at 20.0 ∘C, what is the difference between the ideal pressure (as predicted by the ideal gas law) and the real pressure (as predicted by the van der Waals equation) ? For argon, a=1.

Which of these is a covalent compound? 1. AICI3 2. CO 3. MgO 4. LiCI

What is a protein used for