Hydrogen chloride gas [ $$$M_{r}: \mathrm{HCl}, 36.5$$$ ] is released at P in the apparatus shown. The universal indicator paper turns red after 38 s . The experiment is repeated using sulfur dioxide gas $$$\left[M_{\mathrm{r}}: \mathrm{SO}_{2}, 64\right]$$$. What is the result for sulfur dioxide gas?

Chemistry

IGCSE&ALevel

CAIE

Exam No：0620_s24_qp_21 Year：2024 Question No：3

Answer:

Knowledge points:

2.3.1. Define isotopes as different atoms of the same element that have the same number of protons but different numbers of neutrons

2.3.2. Interpret and use symbols for atoms, $\text { e.g. }{ }_{6}^{12} \mathrm{C} \text {, and ions, e.g. }{ }_{17}^{35} \mathrm{Cl}$

2.3.3. State that isotopes of the same element have the same chemical properties because they have the same number of electrons and therefore the same electronic configuration

2.3.4. Calculate the relative atomic mass of an element from the relative masses and abundances of its isotopes

Answer:

Knowledge points:

Solution:

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