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natita [175]
3 years ago
10

Why are fossil fuels still the primary way humans harness power

Chemistry
1 answer:
Lubov Fominskaja [6]3 years ago
3 0

Answer:

Fossil fuels are still the number primary way to harness power because we know how to do it very well and it cost less than other any other way to harness energy

Explanation:

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Is green ink homogeneous or heterogeneous?
Leno4ka [110]
<span>Green ink is homogeneous.
please mark as brainliest

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7 0
3 years ago
The energy needed to create bonds between two hydrogen molecules is measured in units called __________
igomit [66]
This is called bond energy, or bond enthalpy, and is measured in units of kilojoules per mole (kJ/mol).
5 0
3 years ago
Aqueous solutions of lithium sulfate and calcium nitrate are mixed, forming the precipitate
Mashcka [7]

Answer:

(aq) Li2SO4 + (aq) Ca(NO3)2 --> (s) CaSO4 + (aq) 2LiNO3

Explanation:

Aqueous Lithium Sulfate is Li2SO4

Aqueous Calcium Nitrate is Ca(NO3)2

When they're mixed, we get the double displacement solution Calcium Sulfate and Lithium Nitrate.

Precipitate is solid.

We got solid Calcium Sulfate so the other solution must be aqueous.

CaSO4 (s) --> Calcium Sulfate product

LiNO3 (aq) --> Lithium Nitrate product

We balance equation now. 2 Lithiums total and 2 Nitrates total. (Cuz there are 2 on the other side, 1 here)

4 0
2 years ago
A lead mass is heated and placed in a foam cup caloriemeter containing 40.0mL of water at 17.0 C. The water reaches a temperatur
Mrrafil [7]

the Answer is             502 Joules

8 0
2 years ago
In going from room temperature 25° to 35 the rate of a reaction doubles calculate the activation energy for the reaction
Pepsi [2]

Answer:

52.9 KJmol-1

Explanation:

From;

log(k2/k1) = Ea/2.303 * R (1/T1 - 1/T2)

The temperatures must be converted to Kelvin;

T1 = 25° C + 273 = 298 K

T2= 35°C + 273 = 308 K

R= gas constant = 8.314 JK-1mol-1

Substituting values;

log 2 = Ea/2.303 * 8.314 (1/298 - 1/308)

Ea = 52.9 KJmol-1

4 0
3 years ago
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