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2 years ago

9

Define thermometer and degree

2 answers:

liraira [26]2 years ago

8 0

Thermometer ⇒ It's a device that calculates temperatures or the temperature ramp ((( Gradient)))

Degree⇒ The unit of the temperatures

Alona [7]2 years ago

4 0

A thermometer is a tool that measures temperature — how hot or cold something is. ... Made up of thermo (heat) and meter (measuring device), the meaning of the word thermometer is pretty straightforward. Thermometers measure temperatures in degrees, according to either the Celsius or Fahrenheit system.

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The enthalpy of solution (dissolving) of sodium hydroxide is given below. Determine the change in temperature of a coffee cup ca

geniusboy [140]

Answer:

The change in temperature of a coffee cup calorimeter is 8.87°C.

Explanation:

Volume of the water = V = 150 g

Density of the water , d =1.0 g/mL

Mass of the water = M

$M=d\times V=1.00 g/mL\times 150 ml =150.0 g$

Mass of solution = m = M = 150.0 g

$NaOH(s)\rightarrow NaOH(aq),\Delta H =-44.51 kJ/mol$

Moles of NaOH = $\frac{5.00 g}{40 g/mol}=0.125 mol$

Energy released when 0.125 moles of NaOH added in water = Q

$Q=0.125 moles\times (-44.51 kJ/mol)=-5.5638 kJ=-5,563.8 J$

1 kJ = 1000 J

Heat gained by water = Q' = -Q ( conservation of energy)

$Q'= 5,563.8 J$

Specific heat of solution = c = 4.184 J/g°C

Change in temperature of the solution = $\Delta T$

$Q'=mc\times \Delta T$

$5,563.8 J=150.0 g\times 4.184 J/g^oC\times \Delta T$

$\Delta T=\frac{5,563.8 J}{150.0 g\times 4.184 J/g^oC}=8.87^oC$

The change in temperature of a coffee cup calorimeter is 8.87°C.

7 0

2 years ago

A. What colors are exhibited by chromium in its<br> common oxidation states?

Lelu [443]

Answer:

Blue, orange and green

Explanation:

Three different colors are observed from compounds containing different oxidation states of chromium: +2 (blue), +3 (green), and +6 (orange).

6 0

2 years ago

H<br> fygykg,hyf<br> ggyhgfsdyhcjsgvfufdgyvyghxhjlkfdhgjkygucdsgyifdc<br> \

kirza4 [7]

Well thats a pretty difficult question, I think the answer might be 4

7 0

2 years ago

Read 2 more answers

A student claims that she cannot identify the exact location of an electron. Which of the following explains if the student's cl

LuckyWell [14K]

Answer:

The claim is incorrect because the exact position of matter is always visible or can be determined.

7 0

2 years ago

WILL GIVE OUT BRAINLIEST..

pogonyaev

Iron-Metal
Boron, Carbon- Same period
Cobalt,Iron- Same family
Hydrogen- smallest atomic number
If C is 20 D should be 21

3 0

2 years ago