Which balanced equation represents a chemical change? A) H2O () + energy → H2O (g) B) 2H2O () + energy → 2H2 (g) + O2 (g) C) H2O () → H2O (s) + energy D) H2O (g) → H2O () + energy

What is the charge of the nucleus of every atom?

Why is surface tension important to life on earth?

Chromium occurs naturally as four isotopes: 50cr with a mass of 49.9460 amu, 52cr with a mass of 51.9405 amu, 53cr with a mass of 52.9407 amu, and 54cr with a mass of 53.9389 amu.

What is described by binary fission A) The way prokaryotes produce energy B) the way prokaryotes digest nutrients C) the way prokaryotes reproduce D) the way prokaryotes move.

A student placed a stack of rocks on a ramp. She added clumps of soil rooted with live grass. Using a garden hose, she then applied a steady spray of water that soaked into the soil, making it heavier. What does the spray from the hose model? A.

Given that the molar mass of NaCl is 58.44 g/mol, what is the molarity of a solution that contains 87.75 g of NaCl in 500. mL of solution? moles of solute Use molarity - liters of solution

What are 3 ways to seperate metal particles and salt

Sarah heated some orange coloured crystals in a test tube. The crystals turned green and fizzed. After the fizzing stopped, the test tube was allowed to cool. A green powder was left in the tube.

In which orbital does an electron in a bromine atom experience the greatest effective nuclear charge?

Kool-Aid is made up of sugar (C6H12O6), food coloring, and water. It is an example of a (n) element heterogeneous mixture homogeneous mixture compound