There is usually some anomalous observation that doesn't seem to fit with our current understanding. Scientists assume that by working at such anomalies, they'll either disentangle them to see how they fit with the current theory or contribute to a new theory. And eventually that does happen: a new or modified theory is proposed that explains everything that the old theory explained plus other observations that didn't quite fit with the old theory. When that new or modified theory is proposed to the scientific community, over a period of time (it might take years), scientists come to understand the new theory, see why it is a superior explanation to the old theory, and eventually, accept the new theory. Theory change is a community process of feedback, experiment, observation, and communication. It usually involves interpreting existing data in new ways and incorporating those views with new results. It may depend on a single definitive experiment or observation to change people's views, or it may involve many separate studies, eventually tipping the balance of evidence in favor of the new theory.
Answer:
561 g P₂O₃
Explanation:
To find the mass of P₂O₃, you need to (1) convert moles H₃PO₃ to moles P₂O₃ (via mole-to-mole ratio from equation coefficients) and then (2) convert moles P₂O₃ to grams P₂O₃ (via molar mass). It is important to arrange the ratios/conversions in a way that allows for the cancellation of units. The final answer should have 3 sig figs to match the amount of sig figs in the given value.
Atomic Mass (P): 30.974 g/mol
Atomic Mass (O): 15.998 g/mol
Molar Mass (P₂O₃): 2(30.974 g/mol) + 3(15.998 g/mol)
Molar Mass (P₂O₃): 109.942 g/mol
1 P₂O₃ + 3 H₂O -----> 2 H₃PO₃
10.2 moles H₃PO₃ 1 mole P₂O₃ 109.942 g
---------------------------- x -------------------------- x ------------------- = 561 g P₂O₃
2 moles H₃PO₃ 1 mole
Answer:
Diagram:
CARBON MINERAL ----> when it is oxygenated and enters into combustion ----> CO2 and H20 are released ------> this reaction is exothermic, it releases heat to the medium in the form of a flame or flare
Explanation:
Combustion is an exothermic chemical reaction, that is, they release heat into the environment. This type of reaction is very common since most of the energy we consume comes from burning materials: fuels.
Example: cooking gas, gasoline, oils and others, all of them obtained from the distillation of petroleum, for this reason they are classified as hydrocarbons. These compounds are formed only by carbon and hydrogen and for a combustion to occur a fuel is necessary: oxygen gas. In the combustion reaction of hydrocarbons the formation of carbon gas (CO2) and water occurs, the energy is released under the form of heat. Let's look at the combustion equation:
H + O2 ==> CO2 + H2O
The reaction generated hardly carbon dioxide and water, when elements such as carbon, nitrogen, sulfur and iron are burned, they give rise to oxides: burning of carbon will generate carbon dioxide, combustion of nitrogen will give rise to nitrogen dioxide, burning sulfur will generate sulfur dioxide and burning iron will generate iron oxide III.
But unfortunately the fuels that are extremely important in our lives also bring tragedies when they end as fires and for this to happen three factors are necessary:
Hot
Presence of a fuel
Presence of an oxidant
Answer:
atoms
Explanation:
Given that,
Given mass = 13200 g
Molar mass of potassium = 39.0983 g/mol
Let there are n number of moles. It is equal to mass divided by molar mass. It is equal to :
Let there are x atoms in 13200 g of potassium (k). It can be calculated :
So, there are atoms.
Answer:How many moles of NH3 are produced from 9 moles of hydrogen? a mot H, 12 mol NH3 = 16 mol NH₂). 3 motta. 3. How many moles of nitrogen are needed to make 6 moles of NH3? ... a. masses, in grams, of all reactants and products.
Explanation:
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