What's the definition of fossil

Two students design an experiment to see if pushing or pulling a box across the floor is more effective. The first student pushes the box across the floor a distance of 20 feet and the second student times how long it takes.

How many milliliters of 3.00 M H2SO4 are required to react with 4.35 g of solid containing 23.2 wt% Ba (NO3) 2 if the reaction is Ba21 1 SO22 n BaSO (s) ?

What must be true about electrons sharing the same atomic orbital? A. They must have absorbed different amounts of energy. B. They must have opposite charges. C. One is negatively charged, the other is neutral. D. They must have opposite spins.

Choose the thermochemical equation that best illustrates ΔH°f (enthalpy of formations) for Li2SO4. A) 2 Li + (aq) + SO42 - (aq) → Li2SO4 (aq) B) 2 Li (s) + 1/8 S8 (s, rhombic) + 2 O2 (g) → Li2SO4 (s) C) Li2SO4 (aq) → 2 Li + (aq) + SO4 2 - (aq) D) 8

What class of elements includes all of the elements that are gases at room temperature? A. Non Metals B. Metals C. Metalloids

In a scientific experiment, the one variable that is purposely changed to test a hypothesis is called the manipulated variable. true or false

Consider separate 100.0-g samples of each of the following: nh3, n2o, hcn, n2h4, and hno3. which of the samples has the greatest mass of nitrogen?

How many grams of iodine are needed to prepare 28.6 grams of ICl

How do the himalayan mountains affect the people of india

Convertible bonds are examples of: a. Securities that have characteristics of both debt and equity b. Non-recurring items c. Assets d. Treasury stock