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suter [353]
3 years ago
15

When a chemical reaction occurs,____.

Chemistry
1 answer:
dem82 [27]3 years ago
7 0

Answer:

when chemical bonds between atoms are formed or broken

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A gold-colored pebble is found in a stream. Its mass is 23.2 mg and its volume is 1.20 mm3. What is its density in grams per cub
Lilit [14]

Answer:

The density in g/cm3 is 1.9333(put a line above the 3's to show it's repeating).

And no it is not gold because the density of gold in g/cm3 is 19.3.

Explanation:

Divide the mass by the volume in order to get an object's Density.

so, 23.2 divided by 1.20 mm3

=1.93333333 g/cm3

That is the density then you find out the density of gold in grams per cubic centimeter, that is 19.3 g/cm3

For example, gold will always have a density of 19.3 g/cm3; if a mineral has a density other than that, it isn't gold.

4 0
3 years ago
Is the following reaction feasible at 340K? Mg + ZnO -> MgO + Zn Enthalpy Data: Mg: 0 kJ/mol ZnO: -348 kJ/mol MgO: -602 kJ/mo
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The answer is A
Explanation
3 0
4 years ago
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Which missing item would complete this beta decay reaction?
Jet001 [13]
We know that the mass number (top number) must be 33 because the electron that is emitted has no mass. The atomic number (bottom number) must be 15, because it is one less than 16 and the electron has a negative charge. Therefore, the first box is the answer.
8 0
3 years ago
What is the name for the process of maintaining a stable environment within a cell?
Rudiy27

Answer:

Homeostasis.

Explanation:

Homeostasis is the process in which your body attempts to bring all functions to an equilibrium. For example:

Are you ever really hot and begin to sweat? That is your body attempting to regulate body temperature by cooling you down with sweat.

3 0
3 years ago
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Which quantity of heat is equal to 200. joules?<br> (1) 20.0 kJ (3) 0.200 kJ
AveGali [126]
The answer is (3) 0.200 kJ
Hope I helped!
4 0
3 years ago
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