What do scientists generally do if they are NOT sure what the expected value of a measurement should be?

A student places a 12-gram cube of ice inside a container. After six hours, the student returns to observe the contents of the container. Which mtence suggests that the container is an open system? O A.

It is likely that Si and P would substitute for each other in a solid solution. True False

Peas contain 250 kJ per 100 g. You would use the equivalent of 600 g of peas if you slept for.

Does observing a physical property of a substance change the identity of the substance? Explain.

If you move an object from the base of a mountain to the top of the mountain what happens to its mass and weight

If a 860. ml of linseed oil has a mass of 680 g, what is the density of the oil

Without any force to change it, an object at rest stays at rest and an object in motion stays in motion. This demonstrates which of Newton's Laws? Question 3 options: (A) Newton's First Law (B) Newton's Second Law (C) Newton's Third Law

You are examining the DNA sequences that code for the enzyme phosphofructokinase in skinks and Komodo dragons.

Scientists are often interested in knowing the molar heat of combustion the heat released during the combustion of one molar of a substance use a periodic table to find molar masses. How many moles of ethanol are present in the sample? ? Mol

Which of the following is not a source of air pollution related to human activities