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Tju [1.3M]
4 years ago
11

Which substance is a compound? A. Li B. N2 C. H2 D. CO2

Chemistry
2 answers:
uysha [10]4 years ago
7 0
A compound has more than 1 element that is bonded together.  The only one listed that fits the definition is D
gayaneshka [121]4 years ago
5 0

The answer is D. CO2  

Carbon and Oxygen are combined together

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How many grams of lithium sulfide must be dissolved in 1600.0 g water to make a 2.0 molal solution?
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Molality is the number of moles of solutes in 1 kg of solvent.
the molality of solution to be prepared is 2.0 molal. 
therefore 2 moles in 1 kg water.
the mass of Li₂S required is - 46 g/mol x 2.0 mol = 92 g
the mass in 1 kg of solvent is - 92 g
Therefore mass of Li₂S required in 1600.0 g is - 92 g/kg x 1.6 kg = 147.2 g
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Which solution when mixed with a drop ofbromthymol blue will cause the indicator to change from blue to yellow
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3 years ago
Construct a simulated proton-decoupled 13C NMR spectrum for tert-butyl alcohol. Drag the resonance signal icon to the appropriat
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Answer:

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(ii) Signal at around 70 ppm:

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4 years ago
Question 12 A chemistry student must write down in her lab notebook the concentration of a solution of sodium thiosulfate. The c
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= 0.393 g / mL.  to the nearest thousandth . (answer).

3 0
4 years ago
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