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Questions in chemistry

[Homework Help] If I add water to 100 mL of a 0.15 M NaOH solution until the final volume is 150 mL, what will the molarity of the diluted solution be?

[Homework Help] How much 0.05 M HCl solution can be made by diluting 250 mL of 10 M HCl?

[Homework Help] After burning for three hours, a candle has lost half of its mass. Explain why this example does not violate the law of conservation of mass.

[Homework Help] What is the molality of a solution in which 3.0 moles of NaCl are dissolved in 1.5 kg of water?

[Homework Help] What is the secondary consumer in the Gulf of Mexico?

[Homework Help] What is a beaker? Can you also post a picture of what it looks like for me?

[Homework Help] The molar heat of fusion of gold is 12.550 kJ/mol. At its melting point, how much mass of melted gold must solidify to release 235.0 kJ of energy?

[Homework Help] How does a magnet separate mixtures?

[Homework Help] Which of the following statements about subatomic particles best characterizes electrons? A. Positive charge, light, circling the nucleus B. No charge, heavy, found in nucleus C. Negative charge, light, circling the nucleus D. Negative charge, heavy, circling the nucleus

[Homework Help] How many atoms are there in 90.2 grams of selenium?