Molar mass of urea (NH2CONH2) is (Given atomic masses: N (14.01 amu), H (1.008 amu), C (12.01 amu), O (16.00 amu)

Determine the number of moles of oxygen in 1.60 moles of sodium hydrogen phosphate (Given molecular formula: Na2HPO4)  

The value between each marking in a 10 ml graduated cylinder is 0.1 mL. When using 10 mL graduated cylinder for measurement, the estimated digit is

Use the balanced chemical equation below to determine how many moles of H2O are produced by the combustion of 22.0 moles of octane (C8H18)  2 C8H18 (l) + 25 O2 (g) → 16 CO2 (g) + 18 H2O (g)

Consider the reaction: 2HCl (aq) + Ca(OH)2 (aq)  à 2H2O (l)  + CaCl2  (aq) How many moles of CaCl2 are theoretically produced if we have 2.6 mols of HCl and 1.4 mols of Ca(OH)2?

Which of the following is a FALSE statement regarding greenhouse gases and global warming?

In 1827, a Scottish botanist Robert Brown (1773 – 1858) observed the jittery motion of pollen grains in water. Einstein (1879 – 1959) developed a theory that qualitatively explained it. In 1908, French physicist Jean Perrin (1870 – 1942) confirmed the Einstein’s model, providing evidence for the real existence of molecules. This proves the following 

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

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

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