One radioactive isotope of calcium has an atomic mass of 47. How many protons are in this calcium-47 nucleus? A) 17 B) 20 C) 27 D) 47

How many significant figures are in 0.00523980 mL? 4 5 3 6 7

What is the Golden Rule of Solubility? A. polar dissolves nonpolar B. nonpolar dissolves polar C. like dissolves unlike D. like dissolves like

A particular single-celled organism uses radiant energy to fix carbon as sugars. This organism generates ATP by breaking down sugars through a process that uses oxygen. Based on this information, how should this organism be classified? A.

Why should you not connect a 6v battery into a circuit that requires a D cell?

The element sulfur is classified as a 1. metal 2. metalliod 3. nonmetal 4. noble gas

How does the density of a hershey bar compare to the density of the a half bar?

Why is it important for scientists and o make data tables

Which of the following compounds will produce H2O as one of the products when it decomposes? a.) Hg (ClO3) 2 b.) Cu (OH) 2 c.) CaO d.) MgCO3

After 10 years, 75 g of an original sample of 100 g of a certain radioactive isotope has decayed. the half-life of the isotope is

When 10.7 g of Al are reacted with 42.5 g of HCl, what volume of H2 will be produced at 47 C and 725 mmHg? Formula: 2Al+6HCl=2AlCl3+3H2