An enzyme is a protein that acts as a catalyst in a chemical reaction that takes place in a living thing true or false

The acidity or alkalinity of an unknown aqueous solution is indicated by its (1) pH value (2) electronegativity value (3) percent by mass concentration (4) percent by volume concentration

A negative ion has more A. protons than electrons B. electrons than protons C. neutrons than protons

Give at least one example from industry where a mixture must be separated in order to obtain the materials that are useful to society.

What mass will 2.5 L of chlorine gas be at STP?

Adding / removing electrons has an effect on the type of element. I need the reasoning and if this is true or false

The word atom comes from a Greek word that means

What is the rate of acceleration of 2000 kilogram truck if a force of 4200 n is used to make it start moving forward

For the chemical reaction H2 + CO2 → H2O + CO, the energy contained in the reactants is 394 kJ, and the energy contained in the products is 352 kJ, assuming 1 mol of each substance is present. Which of the following statements is true? A.

Why is particle size important in a heterogeneous catalyst

In a scientific experiment, the one variable that is purposely changed to test a hypothesis is called the manipulated variable. true or false