Question

1. choose the best answer. which law did dalton propose? law of conservation of mass law of definite proportions law of multiple proportions law of reciprocal proportions 2) choose the best answer. which experiment helped dalton disprove the idea that matter could not infinitely divide? experiments with chemicals that change color experiments with different gas pressures experiments with water and ice experiments with chemicals that create salts

Explanation:

• For the first question:
• The law of conservation of mass was proposed by Antoine - Laurent de Lavoisier.
• The law of definite proportions was proposed by Joseph Proust.
• John Dalton proposed the law of multiple proportions.
• The law of reciprocal proportions was proposed by Jeremias Richter.
• For the second question:
• Dalton's experiments with different gas pressures led him to the atomic theory. He found that gases combine in simple ratios, which suggested that matter is composed of discrete particles (atoms), thus disproving the idea of infinite divisibility of matter. Experiments with color - changing chemicals, water - ice experiments, and salt - creating chemical experiments were not the key ones for this particular conclusion.

Answer:

1. law of multiple proportions
2. experiments with different gas pressures