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STALIN [3.7K]
3 years ago
15

Evidence of a chemical change would be a ___________________. Question options: spinning top. rusting car fender. spilled bucket

of water. melting popsicle.
Chemistry
1 answer:
Vikki [24]3 years ago
6 0
The answer is the second option "rusting car fender." Hope this helps.
 (ノ◕ヮ◕)ノ*:・゚✧
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Given the following skeleton equation, what are the coefficients for the chemicals in the reaction? __H20 + __ P4O10 = __ H3PO4
AysviL [449]
6H2O + P4O10 = 4H3PO4
Coefficients: 6, 1, 4
4 0
3 years ago
What are neutral substances?
Valentin [98]

Answer:

Neutral substance is the one that neither exhibits acidic properties nor basic. Such a type of substance has equal no. of hydrogen and hydroxyl ions. Due to the neutrality state these substances do not show changes in the indicators.

8 0
3 years ago
Help ASAP!!! I need it now i have to write similar test tmrw
dusya [7]
A is Ea, which stands for activating energy. Energy is needed to get the reaction underway and Ea is the energy needed to “start” the reaction.

B is the temperature either released or absorbed.

The diagram shows that the reaction is exothermic based on the fact that the products energy is lower than the reactants. That is because energy (which is temperature in this case) is released during the process. If the reactants would have been lower than the products, the reaction would be endothermic.
3 0
2 years ago
Read 2 more answers
What is required in order to determine wether or not an object moves
Stels [109]

Answer:

The answer would be Point of Reference.

In order to determine, whether an object has moved or not, a point of reference is required. The reference point is required to the measure the movement of the object, without a reference point the distance or displacement cannot be obtained. Hence, a reference point is very required to determine, whether the object has moved or not.

(Hope this helps) Sky

7 0
3 years ago
A 453 g piece of glass at 25.7∘C is left outside on a sunny day. How much heat must the glass absorb from the sun in order to re
Tju [1.3M]

Answer:

Q = 5555.6J

Explanation:

Mass of glass piece, m = 453g

initial temperature = 25.7°C

temperature to be attained = 40.3°C

⇒change in temperature, Δt = 40.3 - 25.7 = 14.6°C

specific heat of glass, s = 0.840J/g°C

Heat absorbed, Q = msΔt

⇒Q = 453×0.840×14.6 = 5555.592J

⇒<u>Q = 5555.6J</u> (rounded to the nearest tenth)

7 0
3 years ago
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