What is the correct scientific notation for 0.00000862

A 15.00g solid mixture containing Ca (OH) 2, among other non-basic components, was neutralized with 0.2000g of HCl. What was the mass percentage of Ca (OH) 2 in the mixture? Round your answer to four significant figures

1. Marque a alternativa que melhor explica o que aconteceu com o átomo ao longo da história. a) Sofreu modificações em suas estruturas no decorrer dos anos.

Read the information about the three atoms given in the table. Which of them are isotopes of each other

Which of the following best describes an electron? A. It has no charge and about the same mass as a proton. B. It has a negative charge and much less mass than a proton. C. It has a positive charge and much more mass than a neutron. D.

A car traveling with constant speed travels 150km in 7200 s. What is the speed of the car

What would happen if you tried to sqeeze a gas into a smaller container?

Paint, paint thinners and some cleaning agents can weaken the shell of a hard hat and may eliminate

A 10 chunk of metal has a specific heat of 0.25 J/g ºC. The temperature is changed from 10ºC to 45ºC. How much heat is required?

In this reaction what is the correct coefficient for sodium chloride? pb (no3) 2? nacl → pbcl2? nano3

Classify each of the following as a path function or a state function. work energy distance traveled enthalpy heat