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NNADVOKAT [17]
1 year ago
11

Using Table 2: Common Radioactive Isotopes, identify the radioisotope that you

Chemistry
1 answer:
TiliK225 [7]1 year ago
3 0

Answer:

Explanation:

Table 2: Common RadioactiveIsotopesUse this table to identify the most likely radioactive material used in theassault.Type ofSourceHalf-lifeRadiationCalifornium-252aIndustrial2.6 years-Used to test luggage for hiddenexplosives-Used to gauge moisture levels of soil fortheconstructionindustryCesium-137,')'Industrial30 years-Used in radio-tracing to identify sources ofsoilerosion anddeposition-Used to determine if oil wells are plugged withsand-Used to measure flow of fluids inpipesMedical-Used in cancertreatmentCobalt-60,')'Industrial5.2 years-Usedto check for cracks inpipesMedical-Used to sterilizeinstrumentsCurium-244aIndustrial18.1 years-Used in mining to analyze the materials dugfrompitsIodine-131,')'Medical8.0 days-Used to diagnose and treat human diseases ofthethyroidPlutonium-239a,yNuclear24,110years-Used as heat source in electricity generatorsonsomespacecraft-Used to buildthermonuclear weaponsPolonium-210a,yIndustrial138 days-Used to reduce static electricityin anindustrialsetting.

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A student carries out the same titration but uses an indicator instead of a pH meter. If the indicator changes color slightly pa
creativ13 [48]

Answer:

Too high a value

Explanation:

HA + NaOH ⟶ NaA +H₂O

If the student has gone slightly past the equivalence point, they have added too much base.

The moles of HA are directly proportional to the moles of NaOH, so the moles of acid that the student calculates will be too high.

The calculated concentration of acid will also be too high.

4 0
4 years ago
Consider the reaction of ethyl acetate with sodium hydroxide: CH3COOC2H5(aq)+NaOH(aq)⇌CH3COONa(aq)+C2H5OH(aq) The reaction is fi
Alexus [3.1K]

Answer: The rate law is rate=k[CH_3COOC_2H_5]^1[NaOH]^1

Explanation:

Rate law says that rate of a reaction is directly proportional to the concentration of the reactants each raised to a stoichiometric coefficient determined experimentally called as order.

For the given reaction:

CH_3COOC_2H_5(aq)+NaOH(aq)\rightleftharpoons CH_3COONa(aq)+C_2H_5OH(aq)

k= rate constant

Rate law: rate=k[CH_3COOC_2H_5]^x[NaOH]^y

For the given rate law:

y =1 =  order with respect to NaOH

n = total order = 2

2= (x+y)

2= (x+1)

x= 1

Thus order with respect to CH_3COOC_2H_5 is 1 and rate law is : rate=k[CH_3COOC_2H_5]^1[NaOH]^1

6 0
3 years ago
If all the water in 430.0 mL of a 0.45 M NaCI solution evaporates what is the mass of NaCI will remain
skad [1K]

Answer:

11.31 g.

Explanation:

Molarity is defined as the no. of moles of a solute per 1.0 L of the solution.

M = (no. of moles of solute)/(V of the solution (L)).

<em>∴ M = (mass/molar mass)of NaCl/(V of the solution (L)).</em>

<em></em>

<em>∴ mass of NaCl remained after evaporation of water = (M)(V of the solution (L))(molar mass)</em> = (0.45 M)(0.43 L)(58.44 g/mol) = <em>11.31 g.</em>

6 0
3 years ago
Read 2 more answers
Designer Andrea Tyson, a conservation planner from Naples, Florida, calls Arendt’s approach "capitalism mated with conservation.
jarptica [38.1K]

Answer:

It uses this term to represent the economic use of land and nature, with minimal degradation and maximum environmental preservation.

Explanation:

Capitalism is an economic system that promotes the maximum economic exploitation of terrestrial resources. It is common for this exploitation to be strongly associated with environmental degradation, destruction of natural habitats, deforestation and death of fauna and flora. With this, we can consider that capitalism is one of the main formulators of environmental degradation, however many professionals have considered the term "capitalism mated with conservation," where terrestrial resources are exploited consciously and with the objective of reducing degradation to the maximum. environmental impact and maximize conservation.

7 0
3 years ago
Name three ill effects of the industrial revolution
Ugo [173]
The depletion of natural resources, the use of chemical and fuel in factories that increased air and water pollution , and increased the use of fossil fuels.
7 0
3 years ago
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