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strojnjashka [21]
3 years ago
13

How do answer it in a complete sentence

Chemistry
1 answer:
alexandr1967 [171]3 years ago
7 0
You have to re state the question and use proper grammar. 
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Need help with these questions ASAP please help !
tester [92]

Answer:

I).... hydrogen gas

ii)... lithium reacts vigorously with cold water

iii)... lithium + water-------> lithium hydroxide + hydrogen gas

6 0
3 years ago
What are the various ways in which an atom of an element can achieve the noble gas configuration ? ​
azamat

Answer:

<h3><em>Atoms attain noble gas configuration </em><em> by obtaining or donating and sharing of electrons present in their outermost shell.</em><em> </em></h3>
7 0
3 years ago
If you complete and balance the following oxidation-reduction reaction in basic solution NO2−(aq) + Al(s) → NH3(aq) + Al(OH)4−(a
andreev551 [17]

Answer:

NO2- + 5H2O + 2Al + OH- → NH3 + 2Al(OH)4-

There is 1 hydroxide ion, on the reactant side

Explanation:

NO2−(aq) + Al(s) → NH3(aq) + Al(OH)4−(aq)

Step 1: The half reactions

NO2- (aq) → NH3(g)

Al(s) → Al(OH)4-

<u>Step 2: </u>Balancing electrons

NO2- → NH3

On the left side N has an oxidation number of +3 and on the right side -3.

NO2- +6e-→ NH3

Al(s) → Al(OH)4-

On the left side, Al has an oxidation number of 0 and on the right side +3.

Al(s) → Al(OH)4- +3e-

To have the same amount of electrons transfered, we have to multiply the second reaction by 2

NO2- +6e-→ NH3

2(Al(s) → Al(OH)4- +6e-)

<u>Step 3:</u> Balance with OH/H2O

NO2- +6e +5H2O → NH3 +7OH-

2Al +8OH- → 2Al(OH)4- + 6e-

<u>Step 4:</u> The netto reaction

NO2- + 5H2O + 2Al + 8OH-  → NH3 +7OH- + 2Al(OH)4-

NO2- + 5H2O + 2Al + OH- → NH3 + 2Al(OH)4-

There is 1 hydroxide ion, on the reactant side

6 0
4 years ago
The law of conservation of momentum states that if objects exert forces only on each other, their total momentum is ____________
iren2701 [21]

Answer:

Conserved.

Explanation:

Momentum can be defined as the multiplication (product) of the mass possessed by an object and its velocity. Momentum is considered to be a vector quantity because it has both magnitude and direction.

Mathematically, momentum is given by the formula;

Momentum = Mass * Velocity

The law of conservation of momentum states that the total linear momentum of any closed system would always remain constant with respect to time.

This ultimately implies that, the law of conservation of momentum states that if objects exert forces only on each other, their total momentum is conserved.

8 0
3 years ago
How many molecules are in 11 moles of O2? Watch your significant figures. Question 5 options: A. 6.6 atoms of O2 B. 6.62 x 1024
brilliants [131]

Explanation:

6.62 × 1023 atom of O2 is your answer

please mark as brilliant

3 0
3 years ago
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