On a weather map, which symbol on a line indicates a cold front? A. semicircle B. squares C. full circles D. triangle

Heart cells require a certain balance of sodium and potassium ions to function. The blood, which is approximately 83% water, carries these two types of ions to the heart.

Which of these is a base? ammonia vinegar HCl HNO3

A 1.25-g sample contains some of the very reactive compound Al (C6H5) 3. On treating the compound with aqueous HCl, 0.951 g of C6H6 is obtained.

2 C2H6 + 7 O2 → 4 CO2 + 6 H2O how many moles of ethane (C2H6) are required to produce 13.5 moles of water from the above reaction?

The element silver has two naturally occurring isotopes, 107Ag and 109Ag. The atomic mass of 107Ag is 106.905. It makes up 51.82% of naturally occurring silver. The average atomic mass of silver is 107.868 amu.

Ice melting, water boiling, lighting a match, grape juice freezing. Which statement describes evidence of a chemical reaction

How do the relative concentrations of hydronium ions and hydroxide ions compare in acidic solution?

Give the name of the orange metal visable after one week

What is the rough er connected to

Two students design an experiment to see if pushing or pulling a box across the floor is more effective. The first student pushes the box across the floor a distance of 20 feet and the second student times how long it takes.