Fe2O3+2Al=Al2O3+2Fe A welder has 1.873 × 10^2 g Fe2O3 and 94.51 g Al in his welding kit. Which reactant will he run out of first? (options: Fe2O3 or Al.......it's Fe2O3). How much of this reactant should he order to make sure he runs out of both reactants at the same time? He should order ___g of the limiting reactant.
Answers
Answer: a)
b) 92.1 g
Explanation:
To calculate the moles, we use the equation:
a) moles of
b) moles of
According to stoichiometry :
1 mole of require 2 moles of
Thus 1.173 require=
of
Thus is the limiting reagent as it limits the formation of product. Thus
will run out first.
is the excess reagent as (3.500-2.346)= 1.154 moles are left unreacted.
2 moles of require 1 mole of
3.500 moles of require=
of
Moles of required = (1.750-1.173) = 0.577
Mass of
Thus he should order 92.1 g of the limiting reactant.
Answer:
92.41g
Explanation:
Related Questions
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Given the reaction at equilibrium:N2(g) + 3H2(g) -->2NH3(g) + 91.8 kJWhat occurs when the concentration of H2(g) is increased?(1) The rate of the forward reaction increases and the concentration of N2(g) decreases.(2) The rate of the forward reaction decreases and the concentration of N2(g) increases.(3) The rate of the forward reaction and the concentration of N2(g) both increase.(4) The rate of the forward reaction and the concentration of N2(g) both decrease.
Answers
Answer:
The colors are produced by heating metal salts, such as calcium chloride or sodium nitrate, that emit characteristic colors. List of colors and elements in Fireworks: Aluminum – Aluminum is used to produce silver and white flames and sparks.
Final answer:
Colors in fireworks are produced by heating certain chemicals until they emit light, creating an emission spectrum. Different chemicals create different colors; for example, sodium compunds create yellow, while lithium creates crimson.
Explanation:
Chemicals are used to produce colors in fireworks by being heated until they are excited and emit light. This produces an emission spectrum which varies based on the element being heated. Sodium and its compounds, for example, produce a bright yellow color. This effect is seen when an electrical discharge is passed through sodium vapor. Lithium, on the other hand, creates a bright, crimson color.
Other alkali metals and their salts also add color to a flame. Even certain alkaline earth metals such as calcium, strontium, and barium give color to a flame giving shades of red and green. In certain specific engines, green and yellow flames are produced using different types of fuel and oxidant mixtures.
Thus, the specific chemicals used and how they're mixed and ignited play a critical role in the color of the resulting fireworks display.
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Answers
I would tend to think that the amount of sunlight reaching the water is irrelevant.
The color of the surface that the water lies on is more important. A black, matte
surface absorbs more infrared radiation than a light-colored, reflective surface.
B. political
C. manufacturing
D. military
Answers
Answer:
C. manufacturing
Explanation:
With the Independence of the Thirteen Colonies in 1776, the colonies became independent states, but united in a Federation, with republican and presidential political representation. States in the northern region concentrated on the development of industry and, to that end, needed free and salaried labor to operate the work within the factories. Prior to the secession war, the northern states had 80 percent of manufacturing capacity in the United States. The formation of the working class and the industrial bourgeoisie in the North has also produced a specific way of looking at political activity and civil rights.
FALSE
Answers
O A. It can be easily manipulated to represent changes that occur
slowly.
O B. All parts of the entire solar system can be modeled in the same
way.
O C. The model shows only how moon phases happen.
O D. The actual Sun-Earth-Moon system moves too quickly to be
studied directly.
Answers
Final answer:
The Sun-Earth-Moon system model using three balls is beneficial because it can easily demonstrate changes that occur slowly, like the orbits and rotations of the Earth and Moon.
Explanation:
The model of the Sun-Earth-Moon system using three balls offers several benefits. However, the most accurate statement regarding its advantages is, it can be easily manipulated to represent changes that occur slowly (Option A). A few movements in this system, such as the rotation of the Earth and Moon, and their orbit around the Sun, occur relatively slowly. Therefore, a physical model can be used to demonstrate these movements exceptionally well. Other options are not accurate as this model does not represent all parts of the solar system (Option B), it does not only show moon phases (Option C), and the real Sun-Earth-Moon system doesn't move too quickly to be studied directly (Option D).
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Answer:
A. it can be easily manipulated to represent changes that occur slowly.
Answers
Answer:
i need help with that too.
Explanation: