Chemistry, 05.01.2020 01:31 jenescobedo
Which statement is true about the activity series? (5 points)
elements are listed according to their reactivity.
elements are listed according to their atomic number.
elements are listed according to their atomic radius.
elements are listed according to their atomic mass.
which of the following statements is true about nuclear fusion? (5 points)
it occurs in the sun.
a heavy atom is split.
it can be controlled easily.
an electron is lost by the atom.
the table shows four reactions.
reactionsreaction equation
1 c3h8 + 5o2 → 3co2 + 4h2o
2 c6h12o6 + 6o2 → 6co2 + 6h2o
3 agno3 + nacl → agcl + nano3
4 2fe + o2 → 2feo
which of the above reactions is an example of a combustion and also a synthesis reaction? (5 points)
1
2
3
4
Answers: 3
Chemistry, 23.06.2019 04:10
Which of the following is described by the equation h2o(s)+ heat=h2o(i) a freezing melting condensing evaporating
Answers: 2
Chemistry, 23.06.2019 05:30
Astudent made the lewis dot diagram of a compound as shown. mg is written with two dots shown on its top. an o is written on each side of mg. each o has six dots around it. an arrow is shown from one dot on mg toward the vacant space around the o on the right. another arrow is shown from the other dot on mg toward the vacant space around the o on the left. the title of the art is students lewis dot model. what is the error in the lewis dot diagram? an o atom should transfer all its six electrons to mg because the formula is mgo. both electrons of mg should be transferred to one o atom because the formula is mgo. the electrons should be transferred from each o atom to mg because mg has fewer electrons. the number of dots around mg should be four because it has to transfer two electrons to each o.
Answers: 2
Chemistry, 23.06.2019 10:00
How many moles are equal to 2.4×10^23 formula units of sodium chloride
Answers: 1
Which statement is true about the activity series? (5 points)
elements are listed accor...
elements are listed accor...
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