Answer:
Your correct answer is A. 1,2,1,2
Explanation:
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Answer:
The mass of the surrounding is ![M_t = 263.9 \ g](https://tex.z-dn.net/?f=M_t%20%3D%20263.9%20%5C%20g)
Explanation:
From the question we are told that
The mass of
is ![m = 13.9 \ g](https://tex.z-dn.net/?f=m%20%3D%2013.9%20%5C%20g)
The mass of water is ![m_w = 250.0g](https://tex.z-dn.net/?f=m_w%20%3D%20250.0g)
The chemical equation for the dissociation process is
![NaOH _{(s) } ---> Na^{+}_{(aq)} + OH^{-} _{(aq)}](https://tex.z-dn.net/?f=NaOH%20_%7B%28s%29%20%7D%20---%3E%20Na%5E%7B%2B%7D_%7B%28aq%29%7D%20%2B%20OH%5E%7B-%7D%20_%7B%28aq%29%7D)
The specific heat capacity of the mixture is ![c_p = 4.18 J g^{-1} C^{-1}](https://tex.z-dn.net/?f=c_p%20%3D%204.18%20J%20g%5E%7B-1%7D%20C%5E%7B-1%7D)
The combined mass of the solution is
![M_t = 263.9 \ g](https://tex.z-dn.net/?f=M_t%20%3D%20263.9%20%5C%20g)
The mass of the surround here is the mass of the coffee-cup calorimeter and this contain the mixture ( water and the NaOH ) so the mass of the surrounding is
![M_t = 263.9 \ g](https://tex.z-dn.net/?f=M_t%20%3D%20263.9%20%5C%20g)
2.15 x 10⁻³mL
Explanation:
Given parameter:
Volume of blood sample in uL = 2.15uL
Conversion uL → mL
micro- and milli- are both prefixes of sub-units.
liter is a unit of volume of a substance.
micro - is 10⁻⁶
milli- is of the order 10⁻³
The problem is converting from micro to milli:
if we multiply 10⁻⁶ by 10³ we would have our milli;
1000uL = 1mL
2.15uL : 2.15uL x
= 2.15 x 10⁻³mL
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Volume brainly.com/question/5055270
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Heating an atom excites its electrons and they jump to higher energy levels. When the electrons return to lower energy levels, they emit energy in the form of light. ... Every element has a different number of electrons and a different set of energy levels. Thus, each element emits its own set of colours.