Which substance can not be broken down by a chemical change? (1) ammonia (2) methanol (3) propane (4) phosphorous

Iron, Fe, is a solid at room temperature. Iron is a shiny, bright white metal that is soft, malleable, ductile and strong.

You are given solutions of hcl and naoh and must determine their concentrations. you use 27.5 ml of naoh to titrate 100.0 ml of hcl and 18.4 ml of naoh to titrate 50.0 ml of 0.0782 m h2so4.

Barium nitrate has the formula Ba (NO3) 2. Which statement is true about barium nitrate? Each molecule contains four different elements. Each molecule contains three atoms. Each molecule contains seven different bonds.

Which planet has these characteristics? - long, extremely hot periods of sun shining during the day - long, extremely cold nights - the smallest planet A. Earth B. Mercury C. Mars D. Venus

I have 2 electrons in first shell 8 in the second shell and 6 in 3 shell

Explain why the radius of an atom cannot be measured directly. (6.3)

Which measurement represents the largest volume? question 7 options: 4.6 l 4.6 * 10-3 l 46 cl 460 ml all represent the same volume?

Which statement explains how the bands in the crystal of a metal are like atomic orbitals? They both have localized electrons that orbit specific atoms. They both involve ionization of some atoms so bonding can occur.

In a system for separating gases a tank containing a mixture of hydrogen and carbon dioxide is connected to a much larger tank where the pressure is kept very low.

What formation is favored by the addition of heat.