The molar mass of iron (Fe) is 55.8 g/mol. what is the mass in grams of 2.25 moles of iron?

The average bond enthalpy for c-h is 413 kj/mol. 413 kj of energy is required to break a mole of ch into atoms: ch (g) →c (g) + h (g), δh=

You cut a piece of wood and sand it to make a model. What kind of change occurred? A. chemical change B. substance change C. phase change D. physical change

Which of the following characteristics is not a property of an acid? a. has a sour taste b. accepts an H + ion c. may cause damage to buildings, statues, and rivers d. increases the concentration of hydronium ions in an aqueous solution

What is the oxidation processes of gaining oxygen?

A scientist has just developed a composite drug to fight seasonal allergies. What's the next step in the engineering process before the drug is released?

What is the chemical formula of a compound that is composed of the ions Ca2 + and br-

What element is likely to form an ionic compound with chlorine?

Will a parachute slow a skydiver more at a very high altitude or a lower altitude?

Carbon monoxide is: Only found in large cities An odorless, colorless, toxic gas Healthy to breath in A danger when driving on the open highway

What is a potential benefit of fuel cell cars? increased efficiency converting gasoline to energy no recharging necessary decreased automobile cost larger engines