Carbon14 has a halflife of 5,730 years. if the age of an object older than 50,000 years cannot be determined by radiocarbon dating, then

What change occurs in the atoms as we move down each chemical family?

List as many experimental techniques as you can that may be used to determine Ksp for a sparingly soluble salt. Select all that apply.

Calculate the energy that is required to change 50.0 g ice at - 30.0°C to a liquid at 73.0°C. The heat of fusion = 333 J/g, the heat of vaporization = 2256 J/g, and the specific heat capacities of ice = 2.06 J/gK and liquid water = 4.184 J/gK. 1.

Which compounds yield hydrogen ions as the only positive ions in an aqueous solution? (1) H2CO3 and HC2H3O2 (2) H2CO3 and NaHCO3 (3) NH3 and HC2H3O2 (4) NH3 and NaHCO3

Given the following balanced chemical equation: Ca (OH) 2 (s) + 2HNO3 (aq) → Ca (NO) 3 (aq) + 2H2O (l) How many grams of Ca (OH) 2 are required to neutralize 25.0 ml of 0.100 M HNO3?

How many sulfide ions are present in 23.5g of Sb2S3

2. An automobile tire has a pressure of 210 kPa at 293 K. What will be the tire pressure after driving, if the tire temperature rises to 308 K?

Students measuring the mass of a rock record 6.759 g, 6.786 g, 6.812 g, and 6.779 g. Which other measurement of the block's mass would be most precise? A. 6.702 g B. 6.781 g C. 6.605 g D. 6.858 g

What two elements make up dihydrogen monoxide?

What did scientists observe using the earliest microscopes