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torisob [31]
2 years ago
13

A neutral group of atoms joined together by covalent bonds

Chemistry
1 answer:
katrin [286]2 years ago
7 0
A MOLECULE
A molecule is a true representative of a covalent bond.
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When a student chemist transferred the metal to the calorimeter, some water splashed out of the calorimeter. will this technique
Natalka [10]

Answer:

It will be reported too low.

Explanation:

To measure the specific heat of the metal (s), the calorimeter may be used. In it, the metal will exchange heat with the water, and they will reach thermal equilibrium. Because it can be considered an isolated system (there're aren't dissipations) the total amount of heat (lost by metal + gained by water) must be 0.

Qmetal + Qwater = 0

Qmetal = -Qwater

The heat is the mass multiplied by the specific heat multiplied by the temperature change. If c is the specific heat of the water:

m_metal*s*ΔT_metal = - m_water *c*ΔT_water

s = -m_water *c*ΔT_water / m_metal*ΔT_metal

So, if m_water is now less than it was supposed to be, s will be reported too low, because they are directly proportional.

5 0
3 years ago
A sample of magnesium oxide has a mass of 94.4 g. How many molecules
ella [17]

Answer: 1.414x10^24 molecules in 94.4g MgO

Explanation: molar mass MgO 40.204

molecules in 40.204 g MgO = avogadro number

molecules in 94.4 g MgO = (94.4/40.204)*avogadro number

(94.4/40.204)*6.02214076*10^23 = 14.14x10^23

7 0
3 years ago
In the raisin experiment what was your first step of the scientific method?
Stella [2.4K]
The first step in the scientific methods is ask a question
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The chemical formula for cesium oxide is Cs2O. What is the charge of cesium?
Cerrena [4.2K]

your answer is A  if i am wrong let me know

8 0
3 years ago
Read 2 more answers
After swimming in the ocean for several hours, the swimmers noticed that their fingers appeared to be very wrinkled or shriveled
MatroZZZ [7]
<span>The answer is hypertonic. In osmosis, water molecules move from a hypotonic solution to the hypertonic solution, through a semipermeable membrane. This occurs until both solutions become isotonic relative to each other.  In osmosis, only the movement of water molecules occurs since the ions are large enough to pass through the pores of the semipermeable membrane, in this case, the cell membrane. Due to loss of water in the process of osmosis, the cells in the fingers of the swimmers shrunk hence looked shriveled.</span>




5 0
3 years ago
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