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Alkali metals react violently with water to form dissolved alkali metal ion, the hydroxide ion, and hydrogen gas. Which among the following alkali metals is more explosive?

A compound has the empirical formula CH2O and a formula mass of 120.10 amu. What is the molecular formula of the compound? [Given the atomic masses: C (12.01 amu), H (1.008 amu), O (16.00 amu)]

Perform the calculation to the correct number of significant figures (8.01 – 7.50)/3.002

Name of the compound N2O5 is [Given prefixes: 1(mono), 2 (di), 3 (tri), 4 (tetra), and 5 (penta)]

Which of the following about the properties of matter is FALSE?

The gas mileage of a car is 22 km/L. Convert the mileage to miles per gallon. (Given: 1 km = 0.6214 mi; 1 gal = 3.785 L)

We can convert between temperature scales with the following formula. o C = (o F – 32)/1.8 Express 40 o C in  o F. 

A scientific theory is a model for the way nature is and tries to explain not merely what nature does, but why. Which of the following statements represent a theory?

How many He atoms are contained in 2.36 moles of He? (Given: 1 mol = 6.022×1023)

Chenab rail bridge is the world’s highest railway bridge, standing at a height of 359 m. The energy possessed by a train moving over this bridge is