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ivann1987 [24]
2 years ago
6

What four elements did the ancient greeks think the world was made of ?

Chemistry
2 answers:
aalyn [17]2 years ago
3 0
Earth, water, air, and fire
Murrr4er [49]2 years ago
3 0

Earth,Fire,Water,and Air

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For an exothermic reaction at equilibrium, how will increasing the temperature affect Keq?
Sonja [21]

Question:

<em>For an exothermic reaction at equilibrium, how will increasing the temperature affect Keq?</em>

Answer:

<em>The reaction will proceed towards the liquid phase. Heat is on the reactant side of the equation. Lowering temperature will shift equilibrium left, creating more liquid water. A reaction that is exothermic releases heat, while an endothermic reaction absorbs heat.</em>

<em>If you increase the temperature, the position of equilibrium will move in such a way as to reduce the temperature again. It will do that by favouring the reaction which absorbs heat. In the equilibrium, that will be the back reaction because the forward reaction is exothermic.</em>

Hope this helps, have a good day. c;


8 0
3 years ago
Plz answer fast Name the four parts of a circuit.
nignag [31]

Answer:

A switch

Battery or cell

Resistor

Rheostat

Appliance or load such as bulb

connecting wires.

Jockey

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5 0
3 years ago
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Relative to protons, electrons have:
saw5 [17]

Answer:

<u><em>(B.) a significantly lower mass that protons</em></u>

Explanation:

The mass (in g) of an electron is 9.11 ×10^{-28}g, which is significantly lower than the mass of protons and neutrons which are approximately the same. They are extremely small (equal to 0 amu), contributing nothing to the overall mass of the atom.

The nucleus has a mass of 1 amu and is positively charged.

6 0
3 years ago
A small hole in the wing of a space shuttle requires a 20.7-cm² patch.
cricket20 [7]

The Patch's area of the space shuttle in km² is 2.07 × 10⁻⁹ km²

Given, that a space shuttle requires a 20.7 cm² patch

We have to convert the patch's area from cm² into km².

Unit conversion is a method in which we multiply or divide with a particular numerical factor and then finally round off to the nearest significant digits.

Patch area of the space shuttle is 20.7 cm²

1 cm = 0.00001 km

or, 1 cm² = (0.00001 km)²

or,  1 cm² = 10⁻¹⁰km²

20.7 cm² = 20.7 ×  10⁻¹⁰km²

20.7 cm² = 2.07 × 10⁻⁹ km²

The patch area in square kilometers is 2.07 × 10⁻⁹ km²

To learn more about unit conversion, visit: brainly.com/question/11543684

#SPJ4

8 0
1 year ago
Whats the formula for soduim hydrogen carbonate
Grace [21]

Answer:

NaHCO3

Explanation:

6 0
3 years ago
Read 2 more answers
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