A 50 W engine generates 50 J of energy. How long did it run for?

A. 10 s

B. 1 s

C. 5 s

D. 100 s

0.070g of hydride of carbon occupies 56cm^3 at S. T. P when vaporized and contained 14.29% by mass of hydrogen. What is the formula for the hydrocarbon

Be sure to answer all parts. the average atomic mass of nitrogen is 14.0067. the atomic masses of the two stable isotopes of nitrogen, 14n and 15n, are 14.003074002 and 15.00010897 amu, respectively.

How many moles of sodium chloride are there in 250 ml of a 1.20 m solution of nacl? 1. none of these 2. 0.60 3. 1.2 4. 2.4 5. 0.30 6. 4.8?

The term odorless or colorless are quantitive terms true or false

How many atoms of Mg are present in 97.22 grams of Mg? 6.022 * 1023 2.408 * 1024 4.818 * 1024 5.855 * 1025

The number of Joules needed to raise the temperature of 10 grams of water from 20°C to 30°C is

Two samples of carbon tetrachloride were decomposed into their constituent elements. One sample produced 38.9 g of carbon and 451 g of chlorine, and the other sample produced 14.8 g of carbon and 135 g of chlorine.

When you burned copper, the product copper oxide appeared on the wire. Besides copper, the other reactant is

An organic compound is one that contains the element carbon. true or false

Most thermal energy in the atmosphere is transferred by what