The order is
1CH4 + 2O2 ----------- 1CO2 + 2H2O
please give me brainliest
Answer: C) Elements and pure compounds are homogeneous materials because they have a uniform composition throughout.
Explanation: Element is a pure substance which is composed of atoms of similar elements. Compound is a pure substance which is made from atoms of different elements combined together in a fixed ratio by mass.
Elements are compounds form homogeneous materials as they have uniform composition throughout and the components are evenly distributed throughout the material.
Mixtures are heterogeneous materials as they do not have uniform composition and the components are not evenly distributed throughout the material.
Answer: a) 
is the limiting reagent
b) 0.27 g of 
will be produced.
Explanation:
To calculate the moles :
According to stoichiometry :
3 moles of require = 2 moles of 
Thus 0.003 moles of will require=
of
Thus is the limiting reagent as it limits the formation of product and is the excess reagent.
b) As 3 moles of give = 2 moles of
Thus 0.003 moles of give = of
Mass of 
Thus 0.27 g of will be produced.
Answer:
37064 J
Explanation:
Data Given:
mass of Steam (m) = 16.4 g
heat released (Q) = ?
Solution:
This question is related to the latent heat of condensation.
Latent heat of condensation is the amount of heat released when water vapors condenses to liquid.
Formula used
Q = m x Lc . . . . . (1)
where
Lc = specific latent heat of condensation
Latent heat of vaporization of water is exactly equal to heat of condensation with - charge
So, Latent heat of vaporization of water have a constant value
Latent heat of vaporization of water = 2260 J/g
So
Latent heat of condensation of water will be = - 2260 J/g
Put values in eq. 1
Q = (16.4 g) x (- 2260 J/g)
Q = - 37064 J
So, 37064 J of heat will be released negative sign indicate release of energy
