5H₂

1. What number represents the coefficient?

2. What number represents the subscript?

3. What element is represented by the letter H?

4. How many total H's are there?

At 1 atm of pressure and a temperature of 0 degrees celsius, which phases of H2O can exist? A.) ice only B.) ice and water C.) ice and water vapor D.) water only E.) not enough data to calculate

K forms the compound K2O, which is an ionic compound that is brittle. Identify another element, M, that is likely to form a brittle, ionic compound with the formula M2O. Justify your answer in terms of periodic trends.

Which of the following are likely to form a covalent bond? - gold and gold oxygen and oxygen magnesium and oxygen magnesium and gold

Which of the following best describes an atom? (1) protons and electrons grouped together in a random pattern (2) protons and electrons grouped together in an alternating pattern (3) a core of protons and neutrons surrounded by electrons (4) a core

Waves carry energy. Which best describes the relationship between the direction of energy and wave motion in a transverse wave? A) The energy direction is perpendicular to the motion of the wave.

What is litmus paper used for? To indicate if all the reactants have been used up to determine if a chemical reaction has occurred to determine pH to detect the presence of water

You open your lemonade stand with 100 lemons, 5 bags of sugar containing 6 cups each, and 10 gallons of water (16 cups per gallon). Which statement is NOT true about the production of lemonade in your stand?

For the complete combustion of 5.6dm3 of a gaseuos hydrocarbon CxHy. 28.0dm3 of oxygen gas were used, 16.8dm3 of CO2 gas and 18.0gof liquid water were produced all gases measurement were made at stp. Determine the chemical formula of the hydrocarbon

What kind or plate tectonic boundary is the san anfreas fault?

What is it called when the state of matter that keeps its shape and volume when it's placed in a different container