How does rhyolite form

Given the following information:Br2 bond energy = 193 kJ/mol F2 bond energy = 154 kJ/mol 1/2Br2 (g) + 3/2F2 (g) - > BrF3 (g) = - 384 kJ/mol calculate the Br-F bond energy. A) 244 kJ/molB) 237 kJ/molC) 712 kJ/molD) 128 kJ/molE) none of these

The amount of heat transferred from an object depends on all of the following except A. the specific heat of the object. B. the change in temperature the object undergoes. C. the initial amount of Calories in the object. D. the mass of the object.

What is gravity the primary source for?

What is the mass of 2.47 moles of fluorine ( f. atoms? 0.130 g 7.69 g 46.9 g my answer 282 g

Which of the following is a balanced chemical equation? A. AgNO3 + NaCl - 4A gC1 + 2NaNO3 B. 2AgNO3 + 2NaC1 - 3AgC1 + 2NaNO3 C. AgNO3 + NaCl - AgC1 + NaNO3 D. AgNO3 + 2Naci - AgCl + 3NaNO3

A peregrine falcon can travel 537,600 furlong/fortnight. A race car travels 212ft/s. A spider can jump with a maximum velocity of 9,000,000 cm/hr. Which travels the fastest?

how many energy levels (shells) does an atom of oxygen have? How do you know this by looking at the periodic table?

A student needs to use 0.575 moles of sodium chloride in an experiment. How many grams should he mass out?

Which of the following seperation methods is used to seperate plant pigments? Filtration, Chromatography, fractional distillation, simple distillation?

If a fast moving car making a loud noise approaches and moves past the person what will happen as the distance between the two increases?