TEST 7 (CHEM, THERMO, WAVEPRO & ANT., MICROWAVE & SATELLITE)

Which of the following is not an extensive property?

• Length

• Volume

• Melting Point

• Weight

Calculate the number of molecules in a 5.00 mol of NH₃

• 3.01 x 10²⁴ molecules of NH₃

• 8.30 x 10^-24 molecules of NH₃

• 3.01 x 10^-24 molecules of NH₃

• 1.58 x 10²⁴ molecules of NH₃

Calculate the number of molecules in a 5.00g of NH₃

• 2.04 x 10²⁴ molecules of NH₃

• 1.95 x 10²⁴ molecules of NH₃

• 1.77 x 10²⁴ molecules of NH₃

• 1.58 x 10²⁴ molecules of NH₃

What do you call with different numbers of neutrons and different mass numbers that have chemically identical atoms of the same element

• Isotones

• Isobars

• Isotopes

• Isomers

It is defined as the number of moles of solute dissolved in 1L of solution

• Mole Fraction

• Molality

• Dilution

• Molarity

Calculate the empirical formula of hypo used in photographic development consisting of 29.1% Na, 40.5% S, and 30.4% O.
(Given that NA = 23 amu, S = 32 amu, O = 16amu)

• NaS₂O₂

• NaS₂O₃

• Na₂S₂O₃

• Na₂S₄O₃

Calculate the mass of the product of the reaction of 56.78g of Na and 23.4g of Cl

• 80.18g

• 58.50g

• 33.38g

• 74.28g

According to the Bronsted Theory, an acid is

• a proton acceptor

• an electron acceptor

• an electron donor

• a proton donor

The ph of the solution with a hydrogen ion concentration 1x10^-5 mol/L is

• 4

• 6

• 5

• 7

Determine the formula mass for C₆H₁₂O₆ (Given that C = 12amu, H = 1amu, and O = 16amu)

• 180 amu

• 148 amu

• 108 amu

• 184 amu