Calculate the specific heat of a metal if 1,270 joules of heat were released when 256 grams of metal cooled 5.8°C. Question 11 options:

a
28.8 g/J°C

b
1,890,00 g/J°C

c
1.17 g/J°C

d
0.855 g/J°C

Aphysical reaction is a process in which one or more reactants change into one or more products with different properties. select the best answer from the choices provided t f

As air becomes more dense, (select all that apply) o. air weighs less o. gas molecules are closer together o. air is colder o. air weighs more o. gas molecules are further apart o. air is hotter

For the reaction shown, calculate how many moles of no2 form when each of the following completely reacts. 2n2o5(g)→4no2(g)+o2(g) part a 1.0 mol n2o5 express your answer using two significant figures. nothing mol m o l request answer part b 5.4 mol n2o5 express your answer using two significant figures.