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4 years ago

Please help! I need answers please!

Chemistry

1 answer:

eduard4 years ago

3 0

2. B: aluminum

3. D: Scientists could not agree on a standard.

4.B: Nonmetals

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Working principles of lithium/solid electrolytes batteries

saw5 [17]

Answer:

The electrolyte carries positively charged lithium ions from the anode to the cathode and vice versa through the separator. The movement of the lithium ions creates free electrons in the anode which creates a charge at the positive current collectors

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2 years ago

Is Salt Water, Beach Sand, Air, Bronze, and Vinegar A

blsea [12.9K]

Answer:

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Explanation:

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3 years ago

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This means that the steel bar lost 14900 J of thermal energy. What is the change in temperature of the steel bar? Recall that th

stiv31 [10]

Answer:

ΔT=-747,13°C

Explanation:

Sensible heat is the amount of thermal energy that is required to change the temperature of an object, the equation for calculating the heat change is given by:

Q=msΔT

where:

Q, heat that has been absorbed or realeased by the substance [J]
m, mass of the substance [g]
s, specific heat capacity [J/g°C] (
ΔT, changes in the substance temperature [°C]

To solve the problem, we clear ΔT of the equation and then replace our data:

Q=msΔT

ΔT=Q/ms

Δ $T=\frac{-14900 J}{40,7g*0,49\frac{J}{gC} }=-747,13$ °C

(Note that Q=-14900 J because there is a LOST of thermal energy)

Thus, the change in temperature of the steel bar is -747,13°C, meaning that the temperature of the bar decreases.

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3 years ago

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Predict the missing component in the nuclear equation

Naddik [55]

The answer is C since both charge and mass have to be balanced on both sides of the equation.

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2 years ago

Need help now! WRITER: Explain how ferns and fungi are different.

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Fungus aren’t plants

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3 years ago