Explain chemistry in own words

65.5g of copper reacts with __g of oxygen to produce 81g copper (I) oxide

A bag filled with lead shots is dropped from a height of h = 38.2 m. The total mass of the bag is m = 745.0 g. What is the increase in the temperature of the lead shots, after the bag hits the ground? The specific heat of lead is c = 130 J/kgK.

The taste of sour milk is lactic acid. What is the molecular formula for lactic acid if the percent composition is 40.00% C, 6.71% H, 53.29% O, and the approximate molar mass is 90 g/mol?

What is 10798 mg converted to kg in the form of scientific notation

Give the percent yield when 162.8 g of CO2 are formed from the reaction of excess amount of C8H18 and with 218.0 grams of O2

Which of the following are balanced equations? Check all that apply. A. 4Na (s) + O2 (g) → 2Na2O (s) B. 2Mg (s) + O2 (g) → 2MgO (s) C. C3H8 (g) + O2 (g) → CO2 (g) + H2O (g) D. C3H8 (g) + 5O2 (g) → 3CO2 (g) + 4H2O (g

A line has a slope of 5 and a y-intercept of - 2. + + + -8-7--5-4-3-2 1.2.3.4.5.6.7.8 x +T919919 What is the x-intercept of the line?

For some reaction carried out at constant atmospheric pressure and at a constant temperature of 25◦C, it is found that ∆H = - 38.468 kJ/mol and ∆S = + 51.4 J mol · K. What is the value of ∆G for this reaction under these conditions?

The specific beta in aluminum is 0,900 J/g • Celsius. How much heat is required to raise the temperature of a 30.0 g block of aluminum from 25 degrees celsius to 75 degrees celsius

Which example has only potential energy and no kinetic energy? a roller coaster zooming down a hill a child riding their bike a bird flying from a tree a ball sitting on a shelf