Which term describes matter that is a substance made of different kinds of atoms bonded together?

You run a chromatography of inks belonging to three crime suspects and from a ransom note. the inks resolve into the following numbers of spots: suspect a=2, suspect b=4, suspect c=3, note=5.

Protozoan infection is not likely to be transmitted by: dog bite direct contact breathing eating

A jeweler guarantees that a piece of jewelry is at least 95% gold, by mass. You consider buying a piece of gold jewelry that weighs 9.85g and has a volume of 0.675cm3. The jewelry contains only gold and silver.

Suppose it is the night before before a big parade, and you are in charge of inflating the big parade balloons. You just learned that the temperature will rise 15 degrees C between early morning and the time the parade starts.

With $8.75 in your pocket, you decide to treat yourself to lunch. How much can you spend on lunch and still have enough to leave a 15% tip?

Water flows at the rate of 0.5 kg/s in a 2.5-cm-diameter tube having a length of 4 m. A constant heat flux is imposed at the tube wall so that the tube wall temperature is always 50°C higher than the water temperature.

Which of the following equations represents a double-displacement reaction? A. FeS (s) + 2HCl (aq) ® H2S (g) + FeCl2 (aq) B. 2Sb (s) + 3I2 (g) ® 2SbI3 (s) C. Zn (s) + H2SO4 (aq) ® ZnSO4 (aq) + H2 (g) D. 2HgO (s) ® 2Hg (l) + O2 (g)

Consider the Williamson ether synthesis between 2-naphthol and 1-bromobutane in strong base. A reaction was performed in which 0.51 g of 2-naphthol was reacted with a slight excess of 1-bromobutane to make 0.29 g of 2-butoxynaphthalene.

How many molecules of n2 are in a 300.0 ml container at 780 mmhg and 135°c?

Why is gas able to flow