Express each of the following to four significant figures 3983.4

444.18

189100

33100

6.302*10-4

5.0472*10-4

Which statement describes how the bond between two oxygen atoms is formed?. a) by sharing valence electrons with many other atoms. b) by the repulsion between ions of like charges. c) by the attraction of two oppositely charged ions.

Which coefficients balance the following equation? __ CH4 + __ O2 = __ CO2 + __ H2O A. 2, 1, 2, 1 B. 1, 2, 1, 2 C. 1, 1, 1, 1 D. 2, 2, 2, 2

Thermochemical Equations Practice 1) Using the balanced thermochemical equation below: 2H2 + O2 + 2H20 + 241.8 kJ How much heat is released when 12.5 grams of hydrogen (Hz) are completely reacted?

When a metal at a higher temperature is transferred to water at a lower temperature, heat is inevitably lost to the calorimeter. how does this heat loss change the value of the calculated specific heat compared to the actual specific heat?

What is the difference between a solution and a heterogeneous mixture?

When does a spring tide take place? At the beginning of spring Only during the spring season Only after spring is over At any time

The highest cloud are known as

What is the mass of 4.85 X 10^22 atoms of iron (Fe) ?

If element x has 95 protons how many electrons does it have

Which of the following when dissolved in deionized water would make a good conducting solution? a) methanolb) sugarc) baking soda