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Answer:
balanced............
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How many moles of oxygen are in 8.24 moles Mg(NO3)2
Calculate the molar mass of the following:(a)the anesthetic halothane, C2HBrClF3(b)the herbicide paraquat, C12H14N2CL2(c)caffein, C8H10N4O2(d)urea, CO(NH2)2(e)a typical soap,C17H35CO2Na
Practice the Skill 21.15b When the following ketone is treated with aqueous sodium hydroxide, the aldol product is obtained in poor yields. In these cases, special distillation techniques are used to increase the yield of aldol product. Predict the aldol addition product that is obtained, and propose a mechanism for its formation. For the mechanism, draw the curved arrows as needed. Include lone pairs and charges in your answer. Do not draw out any hydrogen explicitly in your products. Do not use abbreviations such as Me or Ph.
During an experiment, a student adds 2.90 g CaO to 400.0 mL of 1.500 M HCl . The student observes a temperature increase of 6.00 °C . Assuming that the solution's final volume is 400.0 mL , the density is 1.00 g/mL , and the heat capacity is 4.184 J/g⋅°C , calculate the heat of the reaction, ΔHrxn .
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Answer:
The correct option is: B) H₂0 and OH⁻ as a conjugate pair
Explanation:
According to Brønsted-Lowry theory, theacids are the chemical substances that form a conjugate base by donating a proton and bases are the chemical substances that form conjugate acid by accepting a proton.
In the given chemical reaction: PO₄³⁻(aq) + H₂O(l) ⇄ HPO₄²⁻(aq) + OH⁻(aq)
According to Brønsted-Lowry theory, PO₄³⁻ and OH⁻ are bases. Whereas, H₂O and HPO₄²⁻ are acids.
Also, PO₄³⁻ and HPO₄²⁻ are the conjugate acid-base pair; and H₂O and OH⁻ are the conjugate acid-base pair.
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A lab group was calculating the speed of a radio car. They measured the distance traveled to be 6 meters and the time to be 3.5 seconds. Then they divided the distance by the time to find the speed. The actual speed was 2.2 m/s. Their percent error is 22.1%.
Percent error is a measure of the difference between an observed value and a true value.
Actual Speed (True Value) = 2.2 m/s
Experimental Speed (Calculated Value) = Distance / Time = 6 m / 3.5 s = 1.714 m/s
The formula for calculating percent error is:
Percent Error = ((|Actual Value - Experimental Value|) / |Actual Value|) * 100%
Calculate the absolute difference between the actual speed and the experimental speed:
|2.2 - 1.714| = 0.486
Calculate the absolute value of the actual speed:
|2.2| = 2.2
Percent Error = (0.486 / 2.2) * 100%
= 0.221 * 100%
= 22.1%
The calculated percent error is approximately 22.1%. This means that the lab group's calculated speed of 1.714 m/s is about 22.1% lower than the true speed of 2.2 m/s.
Percent error is a way to quantify the accuracy of experimental measurements. A positive percent error indicates that the experimental value is higher than the true value, while a negative percent error indicates that the experimental value is lower. In this case, since the calculated speed is lower than the true speed, we have a positive percent error.
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Answer:456
Explanation:
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Answer:
verdadero/a
falso/b
verdadero/c
Explanation:
a) air
b) land
c) water
d) birds in the air
e) trees on land
f) organisms in the water
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The resources and organisms are affected by oil spillages are Air, Water, and Organisms in water
Effect of oil spillage
Oil spillage can cause to the general environment and the organisms in the environment.
Based on the passage, the resources and organisms are affected by oil spillages include the following;
- Air
- Water, and
- Organisms in water
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Answer:
A,C,F/Air,water,orginisams in water
Explanation:
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Injecting or smoking cocaine produces a quicker strong high than snorting it.
Cocaine is a powerfully addictive stimulant drug crafted from the leaves of the coca plant local to South the us. despite the fact that healthcare companies can use it for legitimate medical functions, including neighborhood anesthesia for a few surgical procedures, leisure cocaine use is unlawful. As a street drug, cocaine looks as if a best, white, crystal powder. road sellers regularly blend it with things like cornstarch, talcum powder, or flour to growth earnings. they will also blend it with other tablets including the stimulant amphetamine, or synthetic opioids, along with fentanyl. adding synthetic opioids to cocaine is specifically risky whilst humans using cocaine don’t recognize it carries this dangerous additive. increasing numbers of overdose deaths among cocaine users might be related to this tampered cocaine.
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To each ml of solution 1.5 ml of water should be added