3 years ago

Hlo guys how are you all

Chemistry

2 answers:

kifflom [539]3 years ago

5 0

Answer:

I'm greattt wbu??? :)))

tangare [24]3 years ago

4 0

Could be better, could be worse

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if you dilute 25.4mL of a 3.5M solution to make 166.7mL of solution, what is the molarity of the dilute solution

Anna11 [10]

Molarity=(initial molarityxinitial volume)/final volume
M=(3.5x25.4)/166.7=0.533 M

8 0

3 years ago

How do you know if the reaction is exothermic or endothermic if both phase are same?

GrogVix [38]

So if the sum of the enthalpies of the reactants is greater than the products, the reaction will be exothermic. If the products side has a larger enthalpy, the reaction is endothermic. You may wonder why endothermic reactions, which soak up energy or enthalpy from the environment, even happen

8 0

4 years ago

Compounds A and B are constitutional isomers (same molecular formula but

Naily [24]

Answer:

Trimethylacetaldehyde

Explanation:

For the unknow compound we have a molar mass of 86 g/mol. We have an even value for the mass, so the compound does not have nitrogen and we can have several posibilities:

A) $C_3H_2O_3$

B) $C_4H_6O_2$

C) $C_5H_1_0O$

D) $C_6H_1_4$

If we check the IR info a signal in 1730 cm-1 appears, this indicates that we have an oxo group (C=O). So, the D option can be discarded. The groups that can have the oxo group are: Carboxylic acids, Ketones and aldehydes.

We don have a signal in 3000 cm-1, so the carboxylic acid can be discarded. Now, is we check the info for the 1H NMR we only have 2 signals. If we only have 2 we will have a very symmetric compound.

By trial an error the find the compound Trimethylacetaldehyde (Figure 1).

3 0

3 years ago

Complete the following reactions using word and balanced equations including states.

netineya [11]

3Ca(OH)₂ (aq) + 2H₃PO₄ (aq) -> Ca₃(PO₄)₂ (s) + 6H₂O (l)

5 0

3 years ago

At 125 °C, 1 mol O₂ and 2 mol H₂ in a chamber have a total pressure of 3 atm. A current is run through the chamber, combining al

labwork [276]

Answer:

1.9998 atm

Explanation:

Balance the equation and then use PV=nRT to find the variable.

8 0

3 years ago

Hlo guys how are you all ​

Hlo guys how are you all