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julia-pushkina [17]
2 years ago
11

Does your always work ?

Chemistry
2 answers:
yaroslaw [1]2 years ago
8 0

Answer:

Explanation:

Huh

motikmotik2 years ago
8 0

Answer:

What??

Explanation:

My brain hurts

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Does a high melting point mean the substance will melt faster or slower?
user100 [1]

Answer:

slower...............

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5 0
2 years ago
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Using the reaction below: 2 CO2(g) + 2 H2O(l) → C2H4(g) + 3 O2(g) ΔHrxn= +1411.1 kJ What would be the heat of reaction for this
maw [93]

Answer:  d) -705.55 kJ

Explanation:

Heat of reaction is the change of enthalpy during a chemical reaction with all substances in their standard states.

2CO_2(g)+2H_2O(l)\rightarrow C_2H_4(g)+3O_2(g) \Delta H=+1411.1kJ

Reversing the reaction, changes the sign of \Delta H

C_2H_4(g)+3O_2(g)\rightarrow 2CO_2(g)+2H_2O(l)

\Delta H=-1411.1kJ

On multiplying the reaction by \frac{1}{2} , enthalpy gets half:

0.5C_2H_4(g)+1.5O_2(g)\rightarrow CO_2(g)+H_2O(l)\Delta H=\frac{1}{2}\times -1411.1kJ=-705.55kJ/mol

Thus the enthalpy change for the given reaction is -705.55kJ

7 0
3 years ago
Why would an atom become an ion?
crimeas [40]

Answer:

c

Explanation: correct me if im wrong

5 0
3 years ago
What is the ratio of [a–]/[ha] at ph 3.75? the pka of formic acid (methanoic acid, h–cooh) is 3.75?
Vikentia [17]

The formula for pH given the pKa and the concentrations are:

pH = pKa + log [a–]/[ha]

<span>
Therefore calculating:</span>

3.75 = 3.75 + log [a–]/[ha]

log [a–]/[ha] = 0

[a–]/[ha] = 10^0

<span>[a–]/[ha] = 1</span>

3 0
3 years ago
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When you connect your evidence to your claim you are using your
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2. reasoning

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3 0
2 years ago
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