The half life of a certain substance is 28 years. how long will it take for a sample of this substance to decay to 78% of its orginal amount.

use the following formulas to answer. P=F/A P1V1=P2V2 sam shoots an arrow towards the target. if the tip of the arrow has an area of 15cm^3 and a force of 25N, what is the pressure

What are the similarities between liquids and gases?

A base that only partly dissociates in solutions is considered?

Why are the internal structures of these limbs similar?

A force of 8,480 n is applied to a cart to accelerate it at a rate of 26.5 m/s2. what is the mass of the cart? 865 kg 320 kg 12.1 kg 3.12 kg

Can somebody explain step by step how to solve decomposition reactions?

Which of the following statements are correct about the chemical reaction? H2 + O2 - > H2O2 versus 2 H2 + O2 - > 2 H2O? They are both balanced chemical equations. The two reactions are equivalent. The laws of thermodynamics apply to both.

What do chemists use to describe a chemical reaction

When you drop a sugar cube in a glass of water, at first the water doesn't taste sweet. Later, it tastes very sweet. Eventually, the water will taste equally sweet throughout. What term explains molecule movement to maintain a balance?

Using density what is the mass in grams of 150mL of a liquid with a density of 1.4 g/mL