Chemistry, 23.12.2019 09:31 jkenkw4667
Question 1 (true/false worth 2 points)
(04.03 lc)
when pb and alcl3 react together, lead (pb) can replace aluminum (al) in the compound because lead is lower on the activity series.
true
false
question 2(multiple choice worth 4 points)
(04.03 mc)
which of the following equations has the correct products and is balanced correctly for a reaction between na3po4 and koh?
na3po4 + 3koh → 3naoh + k3po4, because k retains the same charge throughout the reaction
na3po4 + koh → na3oh + kpo4, because k increases in charge from 1+ to 3+ when it is replaced
na3po4 + koh → 3naoh + k3po4, because k retains the same charge throughout the reaction
na3po4 + koh → na3oh + k3po4, because k increases in charge from 1+ to 3+ when it is replaced
question 3(multiple choice worth 4 points)
(04.03 lc)
which of the following is a single replacement reaction?
ba(oh)2 + h2so4 → baso4 + 2h2o
2mg + o2 → 2mgo
h2o+ co2 → h2co3
zn + h2so4 → znso4 + h2
question 4(multiple choice worth 4 points)
(04.03 mc)
sodium metal reacts with water to produce hydrogen gas.
what best describes this reaction?
a single replacement reaction takes place because sodium is less reactive than hydroxide ions.
a double replacement reaction takes place because sodium is less reactive than hydroxide ions.
a double replacement reaction takes place because sodium is more reactive than hydrogen.
a single replacement reaction takes place because sodium is more reactive than hydrogen.
question 5 (true/false worth 2 points)
(04.03 lc)
a single replacement reaction is a reaction in which one element replaces a similar element within a compound.
true
false
question 6(multiple choice worth 4 points)
(04.03 mc)
the table shows the nature of reactants and products formed in a certain type of chemical reaction.
nature of reactants and products
reactants products
metal + ionic compound metal + ionic compound
which of the following is true about the type of chemical reaction?
it is a single replacement reaction, and the anions in the two ionic compounds are different.
it is a single replacement reaction, and the cations in the two ionic compounds are different.
it is a double replacement reaction, and the anions in the two ionic compounds are different.
it is a double replacement reaction, and the cations in the two ionic compounds are different.
Answers: 2
Chemistry, 22.06.2019 03:30
Explain why pure hydrogen cyanide does not conduct electricity, but become a conductor when it is dissolved in water? (at room temp, pure hcn exists as a volatile liquid)
Answers: 1
Chemistry, 22.06.2019 07:00
How heavy is thanos? a) 3000 lbs b) all of it c) the price of tea in china d) heavy enough
Answers: 2
Chemistry, 22.06.2019 12:00
Ineed this asap part i: scientific method what is the difference between science and pseudoscience? what is the scientific method?
Answers: 2
Chemistry, 22.06.2019 14:40
Choose an equation that represents an enzyme-catalyzed reaction. (a) enzyme + substrate → enzyme-substrate complex (b) enzyme + substrate ←−→ enzyme + products (c) enzyme + substrate ←−→ enzyme-substrate complex → enzyme + products (d) enzyme + substrate ←−→ enzyme-substrate complex → enzyme-substrate complex + products
Answers: 2
Question 1 (true/false worth 2 points)
(04.03 lc)
when pb and alcl3 react togethe...
(04.03 lc)
when pb and alcl3 react togethe...
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