Write the name of the chemical missing in this equation

calcium carbonate + hydrochloric acid - -> calcium chloride + water + ...

A) hydrogen

B) oxygen

C) nitrogen

D) carbon dioxide

Which of the following groups of elements are most likely not to show similar properties? carbon, silicon, and tin helium, neon, and argon francium, radium and hassium manganese, rhenium, and technetium

What term described the movement of around the once a year

If sugar contains 41.86 carbon and 6.98 hydrogen what percentage of sugar is oxygen

What is the smallest type of pyroclastic material

Hiw to separate and measure a mixture of iron fillings, sugar, and salt

The hydrogen spectrum has a red line at 656 nm, and a blue line at 434 nm. What is the first order angular separation between the two spectral lines obtained with a diffraction grating with 5000 rulings/cm? A. 7.7 degrees B. 16.6 degrees C. 6.

g write net ionic equations for the reactions of h2po4 - an amphiprotic ion with aqueous solutions of hcl koh

Eagles use sharp talons to grab fish from the water. What characteristic of life is this most directly an example of?

Which of the following statements about rock and mineral resources is true

What are similarities between opinion based research and observation based research