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alukav5142 [94]
4 years ago
7

What is the relationship between events and patterns?

Chemistry
2 answers:
MAXImum [283]4 years ago
8 0
Events that happen over and over create/become a pattern
earnstyle [38]4 years ago
6 0

Answer:

events that happen over and over form a pattern

Explanation:

An event is the occurrence of something. If an event occurs over and over again following some sort of order the order is known as the pattern. The pattern is the overall structure that an event follows. Without a number of events there is not pattern. However, an event can occur without a pattern. The relationship among events is called a pattern

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6 0
3 years ago
What mineral is usually identified by using the acid test?
podryga [215]
Some rocks contain carbonate minerals, and the acid test can be used to help identify them.
5 0
3 years ago
Please Help! Use Hess’s Law to determine the ΔHrxn for: Ca (s) + ½ O2 (g) → CaO (s) Given: Ca (s) + 2 H+ (aq) → Ca2+ (aq) + H2 (
poizon [28]

Answer:

ΔHrxn = -635.14kJ/mol

Explanation:

We can make algebraic operations of reactions until obtain the desire reaction and, ΔH of the reaction must be operated in the same way to obtain the ΔH of the desire reaction (Hess's law). Using the reactions:

(1)Ca(s) + 2 H+(aq) → Ca2+(aq) + H2(g) ΔH = 1925.9 kJ/mol

(2) 2H2(g) + O2 g) → 2 H2O(l) ΔH = −571.68 kJ/mole

(3) CaO(s) + 2 H+(aq) → Ca2+(aq) + H2O(l) ΔH = 2275.2 kJ/mole

Reaction (1) - (3) produce:

Ca(s) + H2O(l) → H2(g) + CaO(s)

ΔH = 1925.9kJ/mol - 2275.2kJ/mol = -349.3kJ/mol

Now this reaction + 1/2(2):

Ca(s) + ½ O2(g) → CaO(s)

ΔH = -349.3kJ/mol + 1/2 (-571.68kJ/mol)

<h3>ΔHrxn = -635.14kJ/mol</h3>
7 0
3 years ago
How can a solid dissolved in water be separated from the water?.
Alex73 [517]

Answer:

Evaporation

Explanation:

Boiling the water will make it evaporate, leaving the solid at the bottom of the solution

3 0
3 years ago
Convert 23.92inHg to Pa.
andriy [413]

Answer:

3189.07Pa

Explanation:

The conversion of 23.92mmH to Pa can be achieved in the following way:

760mmHg = 101325Pa

23.92mmHg = (23.92x101325)/760 = 3189.07Pa

5 0
3 years ago
Read 2 more answers
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