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Allushta [10]
3 years ago
8

The alkali metal that is naturally radioactive is ________.

Chemistry
1 answer:
Irina18 [472]3 years ago
6 0
Answer:  "francium<span> (Fr) " .
__________________________________________________</span>
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2. After quenching your solution with ice, the resulting aqueous layer became acidic. Use a chemical equation to explain how the
alexandr402 [8]

Answer:

C2H5Cl + H20 ⇆ C2OOH4

Explanation:

The left over acetyl chloride which reacted with water to produce acetic acid

3 0
3 years ago
How much lead(II) chromate (PbCrO4) is precipitated by mixing 100 mL of aqueous 3 M
ICE Princess25 [194]

Answer:

38.8 g of PbCrO₄ are precipitated from the reaction

Explanation:

We have the following chemical reaction:

K₂CrO₄ (aq) + Pb(NO₃)₂ (aq) → 2 KNO₃ (aq) + PbCrO₄ (s)

where:

(aq) - aqueous

(s) - solid

Now we use the following formula to calculate the number of moles:

molar concentration = number of moles / volume (L)

number of moles = molar concentration × volume (L)

number of moles of K₂CrO₄ = 3 × 0.1 = 0.3 moles

number of moles of Pb(NO₃)₂ = 2 × 0.1 = 0.2 moles

We see from the chemical reaction that 1 mole of K₂CrO₄ will react with 1 mole of Pb(NO₃)₂ so 0.3 moles of K₂CrO₄ will react with 0.3 moles of Pb(NO₃)₂ but we have only 0.2 moles of Pb(NO₃)₂ available, so the limiting reactant is Pb(NO₃)₂. Taking this in account we devise the following reasoning:

if           1 moles of Pb(NO₃)₂ produces 1 mole of PbCrO₄

then     0.2 moles of Pb(NO₃)₂ produces X moles of PbCrO₄

X = 0.2 moles of PbCrO₄

number of moles = mass / molar weight

mass = number of moles × molar weight

mass of PbCrO₄ = 0.2 × 194 = 38.8 g

Learn more about:

molar concentration

brainly.com/question/14331620#

brainly.com/question/14133486

#learnwithBrainly

4 0
3 years ago
The table shows the average number of pounds of trash generated per person per day in the United States from 1970 to 2010. Use t
REY [17]
Is there supposed to be a table attached???

can’t help u
4 0
3 years ago
Surrounding
umka2103 [35]

Based on the data given in this question, the statement that shows a correct interpretation of the chemical reactions is as follows: reaction A was exothermic and reaction B was endothermic.

<h3>What are endothermic and exothermic reactions?</h3>

Endothermic reaction is a chemical reaction that absorbs heat energy from its surroundings while exothermic reaction is a reaction that releases energy in the form of heat.

Endothermic reactions leave their surroundings cooler while exothermic reactions leave their surroundings hotter.

According to this question, the initial and final temperatures of two reactions are given as follows:

  • Reaction A: 25.1°C and 30.2°C
  • Reaction B: 25.1°C and 20.0°C

From the above data, reaction A was exothermic because it increased the surrounding temperature and reaction B was endothermic because it reduced the surrounding's temperature.

Learn more about endothermic and exothermic at: brainly.com/question/23184814

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4 0
2 years ago
Which one is an expression of distance in Sl units?
Svetllana [295]

Answer:

500 meters

Explanation:

____________________

8 0
2 years ago
Read 2 more answers
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