Express in scientific notation. Choose the answer with the proper number of significant figures.

1.24 x 10/6.2 x 10-3=

How many ml of 2.50 m hno3 are needed to prepare a 75.0 ml of 1.00 m hno3?

Which element has the smallest atomic radius? calcium potassium scandium titanium

Phosphorus-32 has a half-life of 14.0 days. Starting with 4.00 g of 32 P, how many grams will remain after 98.0 days?

What net ionic equation describes the reaction when these solutions are mixed? Given the equation: Na3PO4 (aq) + CaCl2 (aq) → A. 2PO43 - (aq) + Cl - (aq) → Cl2 (PO4) 3 (s) B. 2Ca2 + (aq) + Na + (aq) → NaCa2 (s) C. Na + (aq) + Cl - (aq) → NaCl (s) D.

A (n) ___ bond is a covalent bond in which the force of attraction for the shared pair of electrons is exerted equally by all of the atoms in the molecule.

To what chemical reaction class does this reaction belong? 2 mg (s) + o2 (g) 2 mgo (s)

Which best illustrates how particle arrangement changes when solids change into liquids

Express in scientific notation (6.0x10^4) (3.1x10^-1)

How do you measure the mass of a liquid?

Given the following information, calculate the mass for B-11. B-10 has a natural abundance of 19.9 percent, while B-11 has a natural abundance of 80.1 percent. The mass of B-10 is 10.013 amu.