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solniwko [45]
3 years ago
14

An iron bar at 325 K is placed in a sample of water. The iron bar gains energy from the water if the temperature of the water is

Chemistry
1 answer:
noname [10]3 years ago
3 0
So what you need to do is to have all your answers in the same unit as the one in the question which is K then look for the one that is greater than that in the question because only then will it absorb heat from the water.

temp. of rod:  325K
(1)  65 K
(2) 45 K
(3) 65° C  =  (65 + 273) K = 338 K
(4) 45° C  =  (45 + 273) K = 318 K

⇒ option 3 is the answer
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Calculate the percent errorin a length measurementof 4.45cm if the correct value is 4.06
FinnZ [79.3K]

Answer:

9.6 %

Explanation:

<u>Step 1: How to define  percent error ? </u>

⇒ % error is the difference between a measured value and the known or accepted value

⇒Percent error is calculated using the following formula:

⇒%error  =  | Experimental value-theoretical value/theoretical value |  x100%

⇔ this can be written as well as : error = (| Experimental value/ theoretical value | - | Theoretical value / Theoretical value | ) x100%

<u>Step 2: Calculate % error</u>

In this case, this means :

%error = ( |(4.45 cm - 4.06cm ) / 4.06cm | ) x100%

%error = 0.096 x100%

%error =9.6 %

3 0
3 years ago
Properties such as luster, conductivity, and flexibility are used to describe what type of elements
sineoko [7]
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6 0
3 years ago
An atom with a high metallic character usually has a ____ electron affinity and a ____ atomic radius.
lianna [129]

Low electron affinity and large atomic radius

Metallic character decreases across a period (from left to right) and increases down a group.

Electron affinity increases from left to right within a period. This is caused by the decrease in atomic radius. Electron affinity decreases from top to bottom within a group. This is caused by the increase in atomic radius.

8 0
3 years ago
Help! This is due tomorrow and my teacher didn't explain this topic very well so I'm totally lost!
nydimaria [60]

Answer:

sorry I'm a dumb small brain

Explanation:

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6 0
3 years ago
A solution is formed by mixing 0.400 mol NaOH
leonid [27]

Answer:

The correct answer is m= mol solute kg soivent

Explanation:

Molality is a measure of concentration, which indicates the moles of solute (in this case sodium hydroxide) in 1kg of solvent .

In this case:

0,800 kg water-----0,400 mol NaOH

1 ,000 kg water ---x=(1 ,000 kg water x 0,400 mol NaOH)/0,800 kg water

x=0,5 mol NaOH---> <em>The solution is 0,5 molal (0,5 m)</em>

6 0
3 years ago
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