A scientist is using a lithium ion battery to power her laptop. Which statement about the battery is correct?(1 point)
Responses
Lithium atoms are created as the battery recharges.
Lithium atoms are created as the battery recharges.
Electrons are lost to the environment when the battery is used.
Electrons are lost to the environment when the battery is used.
A new substance is formed as the battery is used.
A new substance is formed as the battery is used.
The mass of the battery increases when it is recharged.
9 answers
The mass of the battery increases when it is recharged.
A scientist is using a lithium ion battery to power her laptop. Which statement about the battery is correct?(1 point)
Responses
Lithium atoms are created as the battery recharges.
Lithium atoms are created as the battery recharges.
Electrons are lost to the environment when the battery is used.
Electrons are lost to the environment when the battery is used.
A new substance is formed as the battery is used.
A new substance is formed as the battery is used.
The mass of the battery increases when it is recharged.
Responses
Lithium atoms are created as the battery recharges.
Lithium atoms are created as the battery recharges.
Electrons are lost to the environment when the battery is used.
Electrons are lost to the environment when the battery is used.
A new substance is formed as the battery is used.
A new substance is formed as the battery is used.
The mass of the battery increases when it is recharged.
Electrons are lost to the environment when the battery is used.
Use the chemical reaction to answer the question.
2H2O2→2H2O +O2
Which statement about the reaction is correct?
(1 point)
Responses
Atoms of H2 and O2 are lost during the reaction.
Atoms of H 2 and O 2 are lost during the reaction.
The reaction creates new atoms of H2O and O2.
The reaction creates new atoms of H 2 O and O 2 .
H2O2 has the same properties as H2O and O2.
H 2 O 2 has the same properties as H 2 O and O 2 .
The H2O and O2 produced have the same mass as the original H2O2.
2H2O2→2H2O +O2
Which statement about the reaction is correct?
(1 point)
Responses
Atoms of H2 and O2 are lost during the reaction.
Atoms of H 2 and O 2 are lost during the reaction.
The reaction creates new atoms of H2O and O2.
The reaction creates new atoms of H 2 O and O 2 .
H2O2 has the same properties as H2O and O2.
H 2 O 2 has the same properties as H 2 O and O 2 .
The H2O and O2 produced have the same mass as the original H2O2.
The H2O and O2 produced have the same mass as the original H2O2.
Suppose 20 atoms of hydrogen (H) react with chlorine (Cl) to produce 20 molecules of hydrochloric acid (HCl). According to the law of conservation of matter, how many atoms of chlorine reacted with the hydrogen?(1 point)
Responses
20
20
10
10
0
0
40
Responses
20
20
10
10
0
0
40
10
Cobalt has a mass number of 59 and an atomic number of 27. A student wants to create a model of a cobalt atom. Which statement about the model is correct?(1 point)
Responses
The model should show 27 protons and 27 neutrons.
The model should show 27 protons and 27 neutrons.
The model should show 27 protons and 32 neutrons.
The model should show 27 protons and 32 neutrons.
The model should show 59 protons and 27 neutrons.
The model should show 59 protons and 27 neutrons.
The model should show 32 protons and 59 neutrons.
Responses
The model should show 27 protons and 27 neutrons.
The model should show 27 protons and 27 neutrons.
The model should show 27 protons and 32 neutrons.
The model should show 27 protons and 32 neutrons.
The model should show 59 protons and 27 neutrons.
The model should show 59 protons and 27 neutrons.
The model should show 32 protons and 59 neutrons.
The model should show 27 protons and 32 neutrons.
1 answer