Which isotope will spontaneously decay and emit particles with a charge of + 2?

(1) 53Fe (3) 198Au

(2) 137Cs (4) 220Fr

What chemical reaction occurs in glow sticks?

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.

What is the formula of the compound between calcium and sulfur that has the percent composition 55.6% calcium and 44.4% sulfur

Analyze a school. Write a sentence using each of the words below. System: Interact: Subsystem: Compare and contrast simple and complex systems. How are they similar? How are they different?

Classify these substances as acidic, basic, or neutral: Vinegar, baking soda, tomato juice, sugar A. Vinegar - acidic Baking soda - basic Tomato juice - acidic Sugar - neutral B.

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