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Ede4ka [16]
4 years ago
12

A _ reaction occurs when a substance usually containing carbon reacts with oxygen to produce energy in the form of light and hea

t.
Chemistry
1 answer:
trapecia [35]4 years ago
3 0
A COMBUSTION reaction occur when a substance ...........................................
Combustion reaction is also known as burning. It occurs when an hydrocarbon react with oxygen to yield carbon dioxide, water and energy in the form of light and heat. Combustion reaction can not take place in the absence of oxygen.
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How many grams are in 5.00 * 10^25 atoms of helium
statuscvo [17]

Answer:

dfghgvfdsrftgbnbvcdfvgbhnbvcxsdefrgthbvcxdsfgt

Explanation:

sdfgvfcdsertgyhbvcfxdsrftgh

4 0
3 years ago
If Thomson’s atomic theory was accurate, what would the results of Rutherford’s gold foil experiment have been?
Arisa [49]

Answer:

If Thomson's atomic theory was accurate, the positively charged particles would have gone through the foil.

8 0
2 years ago
What is the measurement?
Lady bird [3.3K]

Pretty sure it's 5.25Explanation:

3 0
3 years ago
Sacrificial protection takes place when a magnesium block is
Liula [17]

Answer:

Explained below.

Explanation:

In oil rigs, Sacrificial protection is the protection of the steel against corrosion by using magnesium block which is a more reactive metal. This means that steel which is to be protected from corrosion will be the cathode while magnesium block preventing it from corrosion will be the anode and as such the block will be the one to corrode instead.

The mechanism behind this sacrificial protection is that the steel pipe on the rig will be connected to the magnesium block through copper wires and then the magnesium block will donate its electrons to the steel thereby preventing it from rusting. Thus is a reversible reaction and as such, after the steel Iron undergoes oxidization by receiving electrons from the magnesium block, it will be immediately be reduced to iron as depicted in the equation below.

Mg⇌Mg^(2+) + 2e-

Fe^(2+) + 2e-⇌Fe

6 0
3 years ago
Which equation represents the total ionic equation for the reaction of HNO3 and NaOH?
lilavasa [31]

Answer:

Total Ionic equation:

H⁺(aq) + NO₃⁻ (aq) + Na⁺(aq) + OH⁻(aq) → H₂O(l) + Na⁺(aq) + NO₃⁻ (aq)

Explanation:

Chemical equation:

HNO₃ + NaOH →  NaNO₃ + H₂O

Balanced chemical equation:

HNO₃(aq) + NaOH(aq) →  NaNO₃(aq) + H₂O(l)

Total Ionic equation:

H⁺(aq) + NO₃⁻ (aq) + Na⁺(aq) + OH⁻(aq) → H₂O(l) + Na⁺(aq) + NO₃⁻ (aq)

Net ionic equation:

H⁺(aq) + OH⁻(aq) → H₂O(l)  

The NO₃⁻ (aq)  and Na⁺ (aq) are spectator ions that's why these are not written in net ionic equation. The water can not be splitted into ions because it is present in liquid form.

Spectator ions:

These ions are same in both side of chemical reaction. These ions are cancel out. Their presence can not effect the equilibrium of reaction that's why these ions are omitted in net ionic equation

6 0
4 years ago
Read 2 more answers
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