Answer: 0.05 M
Explanation:
Para responder esta pregunta, hay que tener en cuenta la Ley de Conservación de la Masa. <u>La misma indica que en una reacción química en un sistema cerrado, la masa total de las moléculas que participan permanece constante.</u> Esto significa que la masa utilizada en los reactivos es la misma que la masa de los productos generados.
En este problema, se cuenta con una solución de NaOH (hidróxido de sodio) tiene una molaridad de 0.204 (siendo la molaridad el número de moles por litro de solución) y se utilizan 16.4 mL de dicha solución para agregarla a 50 mL de una solución de H3PO4 (ácido fosfórico).
Entonces, ya que la masa de ambas soluciones no se pierde, podemos utilizar la ecuación de la Ley de Conservación de la Masa:
Concentración inicial x Volumen inicial = Concentración final x Volumen final.
Concentración inicial: 0.204 M
Volumen inicial: 16.4 mL
Concentración final: ?
Volumen final: 50 mL + 16.4 mL = 66.4 mL
Reemplazamos los valores en la ecuación:
0.204 M x 16.4 mL = Concentración final x 66.4 mL
La molaridad de la solución de H3PO4 es de 0.05 M.
The pulmonary vein carries oxygenated blood from the lungs to the left atrium
Answer:
The main reason many people choose to avoid green action is that they think it will cost them more than their typical, environmentally harmful activities. Many times, it is true that environmental friendly products come with high up-front costs, but these costs almost always are made back over the lifetime of products. Many environmentally friendly products are far more efficient and cost-effective over their life-time than other, less clean options. For the most part, people are simply unaware of the economic benefits of going green. This lack of knowledge make consumers unwilling to make decisions that they perceive will cost them more money. No matter how dedicated to the environment a person is, if they believe it will lose them money, it is unlikely that they will ever do anything about it. While total spending on green products may be increasing in the United States, the market share remains dangerously low – typically making up only 3-5% of any given market.
Answer:
community
Explanation:
Community refers to a group of populations of different species that live together in a defined habitat. These species exhibit interdependence for one or other resources. It is a level of the ecological organization just above the population and consists of hundreds of different types of organisms of various species.
Butterflies and flowering plants belong to different species. Butterflies are dependent on these plants for food. Therefore, these two together represent two populations of different species living together in habitat and are an ecological community.
