In a chemical reaction, ∆H is positive when
In a chemical reaction, ∆H is positive when A. H (product) >H (reactant) B. H(product)(reactant) C. H (product)…
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How many molecules are there in 14 g of nitrogen at s.t.p.? [N = 14,…
How many molecules are there in 14 g of nitrogen at s.t.p.? [N = 14, Avogadro’s constant =…
Consider the reaction represented by the equation: 2NaHCO3 → Na2CO 3 + H 2O +…
Consider the reaction represented by the equation: 2NaHCO3 → Na2CO 3 + H 2O + CO 2. What…
What is the percentage by weight of calcium in Ca(OCI)2? [Ca = 40, Cl =…
What is the percentage by weight of calcium in Ca(OCI)2? [Ca = 40, Cl = 35.5, O =…
What is the value of -14oC on the Kelvin temperature scale?
What is the value of -14oC on the Kelvin temperature scale? A. 259K B. 287 K C. 287oK…
The number of particles in one mole of a chemical compound is the
The number of particles in one mole of a chemical compound is the A. atomic number B. avogadro’s…
In bonded atoms, increase in electronegativity difference,
In bonded atoms, increase in electronegativity difference, A. increases polarity B. decreases polarity C. has no effect on…
Which of the following molecules is not linear in shape?
Which of the following molecules is not linear in shape? A. CO2 B. O 2 C. NH3 D.…
Which of the statements about the behaviour of the atom is correct?
Which of the statements about the behaviour of the atom is correct? A. atomic size decreases down the…
Which of the following properties of covalent compounds is not correct? They
Which of the following properties of covalent compounds is not correct? They A. are non-electrolytes B. are mostly…