Two different isotopes of the same element have : (t/f)

- Equal nuclear charges

- Similar radioactive decay properties

- Equal mass of an atom

- Different number of neutrons

- Equal mass of a nucleus

According to the electromagnetic spectrum, if the wavelength is increasing then, what is the effect on energy?

Which material is most likely to be a base? salt water vinegar coffee orange juice

Match the term with the example that shows its definition. Molecular composition A) Water has two hydrogen atoms and one oxygen atom Flammability B) Gasoline catches fire Heat of combustion C) High lead levels in a lake kill fish Toxicity D) The

What is the chemical formula for soft soap

Question a chemist mixes 35 milliliters of a solution that is 18% acid with 90 milliliters of a solution that is 68% acid. answer the questions below. do not do any rounding.

The thermal effect of the water formation reaction is 286 kj. what will be the thermal effect of its decomposition? why?

Given 13.5 grams of substance Z, if the substance absorbs 36 kilojoules of energy and the temperature increases by 25 degrees Celsius, what is the specific heat of the substance? 1.07 x 102 J/g·°C 1.22 x 104 J/g·°C 1.07 x 10-1 J/g·°C 1.

DNA is a nucleic acid made of building blocks called nucleotides. Which of the following options make up nucleotides?

A person drinks eight glasses of water each day, if each glass contains 300mL how many liters of water does a person drink in a year?

An organic compound contains C=61%, H=11.8% and O=27.12%. Calculate the empirical formula and molecular formula of the compound. The vapour density of the compound is 59.