BMAT BMAT Scientific Knowledge & Applications 2

Question 1

In BMAT Section 2 chemistry, what is the pH of a neutral aqueous solution at 25°C?

Accepted Answer

7

Answer

At 25°C, a neutral solution has equal concentrations of H⁺ and OH⁻ ions, giving a pH of 7.

Question 2

What type of chemical bond is formed when electrons are shared between two atoms?

Accepted Answer

Covalent bond

Answer

Covalent bonds form through the sharing of electron pairs between atoms.

Question 3

In BMAT chemistry, what happens in an exothermic reaction?

Accepted Answer

Energy is released to the surroundings

Answer

Exothermic reactions release energy (usually as heat) to the surrounding environment, raising the temperature of surroundings.

Question 4

Which formula correctly calculates the number of moles of a substance?

Accepted Answer

Moles = Mass ÷ Molar Mass

Answer

Moles = Mass (g) ÷ Molar Mass (g/mol), converting grams to moles using the molar mass as a conversion factor.

Question 5

In BMAT chemistry, which statement about isotopes is correct?

Accepted Answer

They have different numbers of neutrons

Answer

Isotopes of an element have the same number of protons but different numbers of neutrons, giving different mass numbers.

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