4. Perform the following heat calculations. You must show all work and include units on answers a. How much heat is required to raise the temperature of 10.0 g of iron from 25°C to 100.°C?
The specific heat capacity of iron is 0.46 J/g°C.

b. The specific heat capacity of water is 4.184 J/g°C. How much heat is required to heat 500.0
g of water from 50.0°C to 100.°C?

c. A 45.4 g sample of lithium is cooled from 250.0°C to 25.0°C. The specific heat capacity of
lithium is 3.56 J/g°C, what amount of heat is released?

d. How many kilojoules of heat are released when 0.72 mole of oxygen gas are used to
combust methane?
CH4 (g) + 2O2 (g) → CO2 (g) + 2H2O (ℓ) + 890kJ

e. How much heat is released when 1.4 mol of hydrogen fluoride are produced?
H2 (g) + F2 (g) → 2HF (g) + 536k

Help me plss! I only have a few hours left!

passed in september 1935, these laws are known as nuremberg laws.   they forbid jews from marrying but not directly forced them to divorce aryans. what is most noticeable is the fact that the jews were defranchised, meaning by this that they were not expected to have any civil rights, including the right to vote. the right answer is deprived of the right to vote.

every chemical equation adheres to the law of conservation of mass, which states that matter cannot be created or destroyed. therefore, there must be the same number of atoms of each element on each side of a chemical equation.

answer is: nuclear fusion produces elements that are heavier than helium.

nuclei combine to form a heavier nucleus, releasing energy.  

for example, fusion of hydrogen atoms at the sun.  

this fusion nuclear reaction is in the inner core of the sun and hydrogen (atomic number 1) is conveted into helium (atomic number 2).  

the inner core is the central region of the sun and all solar energy is produced in the core by nuclear fusion.