Answer:
c-do background research.
Explanation:
The scientific methods exposes the way scientists carry out their investigation and how findings are reported and at times discarded. It is systematic way of studying perceived observations in the environment.
During the course of an investigation, scientists may seek to find out about the prevailing knowledge about a phenomena and the level of research that might have been done in that regard. It is proper for such a scientist to do a background research by searching for related journals and publications in that field.
Answer:
<u><em>Pentane </em></u>
Explanation:
since we have in here CH3-CH2-CH2-CH2-CH3 5 Carbon atoms and 12 Hydrogen making it
Answer:
0.21 kg
Step-by-step explanation:
Volume of cola = 2.0 L × (33.8 fl oz/1L)
= 67.6 fl oz
Grams of sugar = 67.6 fl oz × (25 g sugar/8.0 fl oz)
= 210 g sugar
Kilograms of sugar = 210 g × (1 kg/1000 g)
= 0.21 kg
Answer:
NH₄⁺: 0.340M
NH₃: 0.277M
Explanation:
A buffer is the mixture of a strong acid with its conjugate base.
For the buffer of NH₃ / NH₄⁺, moles of each one are:
NH₄⁺: 0.287L × (0.310mol / L) = 0.0890 moles
NH₃: 0.287L × (0.310mol / L) = 0.0890 moles
The reaction of HNO₃ with NH₃ is:
HNO₃ + NH₃ → NH₄⁺ + NO₃⁻
Moles of 1.50mL of 6.00M HNO₃ are:
1.50x10⁻³L × (6.00mol / L) = 9x10⁻³ moles of HNO₃. These moles are moles produced of NO₃⁻ and consumed of NH₃. Thus moles after reaction are:
NH₄⁺: 0.0890 moles + 0.0090 moles = <em>0.0980moles</em>
NH₃: 0.0890 moles + 0.0090 moles = <em>0.0800moles</em>
As total volume is 287.00mL + 1.50mL = 288.50mL (0.28850L), concentrations are:
NH₄⁺: 0.0980moles / 0.28850L = 0.340M
NH₃: 0.0800moles / 0.28850L = 0.277M
Answer:
B) It must be a weak acid.
Explanation:
If HA is a strong acid
Now the pH value can be written as follows
But given that acid HA has 2.3 pH value.
Therefore we can say that HA is weak acid.
Thus the answer will be option (B).
B) It must be a weak acid.