Carbon-14 has a half-life of 5720 years and this is a first order reaction. If a piece of wood has converted 25% of the carbon-14, then how old is it?

What does oil have to do with fat

Calculate the volume of compound Y needed to make a 350 pg/ml treatment solution in 2 ml of 1x PBS using a stock solution containing 50 ml of compound Y at 50 pg/ml. 14 l Not possible to make as described 140 pl 1.4 mi

Which one of the following groups consists of one mixture, one element and one compound? 1. Aluminium, water and nitrogen gas 2. Aluminium, steel and air 3. Air, water and iron oxide 4. Calcium, soil and sodium chloride

Which of the following atoms contains seven valence electrons? carbon iodine hydrogen helium

What is the formula for CO3 2 - and Al3 + ?

What does a three letter chemical symbol mean

When 21.6 g of carbon were burned in the presence of 73.7 g of oxygen, 16.1 g of oxygen remained unreacted. What mass of carbon dioxide was produced?

How do you go from 2 mol of co2 to _ mol of c

What happens to the conductivity of water when an acid is dissolved in it?

How many gallons in 2 L bottle