Which solution is a homogeneous mixture?

O sand and water

salt and water

salad dressing

soil

Joseph has hypothesized that sound travels in waves. If he were following the scientific method, what should he do next? A. Ask a question. B. Test the hypothesis. C. Study the results. D. Tell other scientists about his hypothesis.

2) Pick the statement about the Bohr model of the hydrogen atom that is NOT true. A) The energy of each Bohr orbit is quantized. B) An electron in a stationary state does not emit radiation.

The bonds between the atoms in an organic moleculea generally

A sample of air has a volume of 140.0 mL at 67C. To w hat temperature must the gas be lowered to reduce its volume to 50.0 mL at constant pressure?

Acid precipitation can be traced back to the burning of fossil fuels. a. True b. False

Which of these substances contributes to soap's slippery texture? O an acid O a base O carbonate O water

When DNA is replicated, it is necessary for the two strands to "unzip" temporarily. Choose which bonding type is most appropriate for holding the strands together in this way.

Match the grams of each element or compound to the corresponding number of moles of that element or compound. 1. 20.0g H 0.011 moles 2. 0.50 g Na 20.0 moles 3. 2.0 x 102 mg H2O 0.022 moles

Select the name of the period 4 transition element that forms a 3 + diamagnetic ion.

What is the mass of 1.70 moles of magnesium chloride, MgCl2?