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ELEN [110]
2 years ago
6

Ano ang scientific method​

Chemistry
1 answer:
marusya05 [52]2 years ago
7 0

Answer:

The scientific method is an empirical method of acquiring knowledge that has characterized the development of science since at least the 17th century. It involves careful observation, applying rigorous skepticism about what is observed, given that cognitive assumptions can distort how one interprets the observation.

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Dan bikes 10 km west and then bikes another 5 km west. What is Dan's
777dan777 [17]
C

This is because 10+5=15
15/45=0.3
4 0
2 years ago
Write the Henderson-Hasselbalch equation for a propanoic acid solution (CH3CH2CO2H, pKa = 4.874) using the symbols HA and A–, an
Luden [163]
The Henderson-Hasselbalch approximation is for conjugate acid-base pairs in a buffered solution. We're going to call HA a weak acid, and A- its conjugate base. The equation is as follows:
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Plugging in our symbols and the pKa value, the equation becomes:
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3 years ago
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3 years ago
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Sodium chloride, NaCl, can be used to melt snow. How many moles of sodium chloride are in a 10 kg bag?
Mekhanik [1.2K]

Answer:

171 moles of sodium chloride

Explanation:

Number of moles = mass/molar mass

Molar mass of sodium chloride = 58.5 g/mol

mass of sodium chloride = 10 Kg or 10,000 g

Now, to obtain the number of moles of sodium chloride;

Number of moles = 10,000 g/58.5 g/mol

Number of moles = 171 moles of sodium chloride

5 0
2 years ago
How many grams of cu would be needed to react with 2 mol hno3
stira [4]
How many grams of Cu would be needed to react with 2.0 mol HNO3? 
<span>by the equation </span>
<span>3Cu + 8HNO3 --> 3Cu(NO3)2 + 2NO + 4H2O </span>
<span>2.0 mol HNO3 reacts with 3/8 ths as many moles of Cu = 0.75 moles of Cu </span>
5 0
3 years ago
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