Hello!
Here from the unbalanced reaction we can balance it by comparing the reactants and products(Left hand side versus Right hand side). We can see one carbon and two oxygen on the left hand side, but then we have two carbon and only 1 oxygen on the rhs. This goes against matter or energy can be neither created or destroyed so we have to balance it first to compare mole to mole relationships. So we can simply right in the the missing elements and balance like this:
SiO2(s) + 2C(s) —-> SiC(s) + C02(g)
Now from the balanced reaction we can see it takes 2 moles of Carbon to make only 1 mole of SiC. So if we are given the amount of moles Of SiC produced, then we can see from the 2:1 Ratio of Carbon:SiC that we need double the amount of Carbon to produce 1mole of SiC(s) since the Carbon used is making SiC(s) and CO2(g). Therefore we would need 5moles of Carbon to start with, in order to make 2.5mole of SiC and CO2 from the reaction given above.
Hope this helps. Any questions please feel free to ask. Thank you kindly!
Answer:
Nervous; nervous.
Explanation:
A sensory system can be defined as components of the central nervous system (CNS) which comprises of the brain, neural tissues or pathways and sensory neurons responsible for sensory functions, perception and processing sensory informations such as sound, light, heat, etc.
Basically, the central nervous system (CNS) interprete the neural signals that are generated from stimuli that are detected by the sensory system. The five (5) main sense organs in the sensory system are: skin, tongue, ears, nose and the eyes.
Generally, the nervous system found in living organisms such as humans, comprises of two (2) major components or systems; a central nervous system (CNS) and a peripheral nervous system (PNS).
HNO3 is Nitric acid
HNO3 can be called hydrogen nitrate if gaseous so watch out for state symbols...
HNO3(l) =nitric acid
HNO3(g) = hydrogen nitrate
saltpetre is a potassium salt KNO3
Nitrous acid is HNO2
hope that helps
To answer this question, we will use the general gas law which states that:
PV = nRT where:
P is the pressure of the gas = <span>10130.0 kPa
</span>V is the volume of the gas = 50 liters
n is the number of moles that we want to calculate
R is the gas constant = <span>8.314 L∙kPa/K∙mol
T is the temperature = 300+273 = 573 degree kelvin
Substitute with the givens in the equation to get the number of moles as follows:
</span><span>10130 * 50 = n * 8.314 * 573
506500 = 4763.922 n
n = </span>506500 / 4763.922
n = 106.3199 moles
