Hypothesis refers to the discovery and raising of problems in observation, after experiment and fact verification, the various correct and reasonable explanations of the problem can rise to theory and become a successful hypothesis.
Answer:
No
Explanation:
Two letters on the top, and two letters on the left. (one letter per square)
Answer:
i don’t understand what you are saying?
Explanation:
Answer:
1.12 g CaCl₂
Explanation:
To find the mass of calcium chloride, you need to (1) convert grams KCl to moles KCl (via molar mass), then (2) convert moles KCl to moles CaCl₂ (via mole-to-mole ratio from equation coefficients), and then (3) convert moles CaCl₂ to grams CaCl₂ (via molar mass). It is important to arrange the conversions in a way that allows for the cancellation of units. The final answer should have 3 sig figs to match the sig figs of the given value.
Molar Mass (KCl): 39.098 g/mol + 35.453 g/mol
Molar Mass (KCl): 74.551 g/mol
Molar Mass (CaCl₂): 40.078 g/mol + 2(35.453 g/mol)
Molar Mass (CaCl₂): 110.984 g/mol
1 CaCl₂(aq) + K₂CO₃(aq) -----> 2 KCl(aq) + CaCO₃(aq)
1.50 g KCl 1 mole 1 mole CaCl₂ 110.984 g
----------------- x ----------------- x ----------------------- x ------------------ =
74.551 g 2 moles KCl 1 mole
= 1.12 g CaCl₂
The correct answer is "greenhouse gases." Certain gases in the atmosphere, like carbon dioxide, nitrous oxide, and methane, absorb heat and prevent it from escaping into space. These gases are called greenhouse gases.