1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
OleMash [197]
3 years ago
13

A calorimeter contains 100 g of water at 39.8 ºC. A 8.23 g object at 50 ºC is placed inside the calorimeter. When equilibrium ha

s been reached, the new temperature of the water and metal object is 40 ºC. What type of metal is the object made from?
Chemistry
1 answer:
Tju [1.3M]3 years ago
6 0
When equilibrium has been reached so, according to this formula we can get the specific heat of the unknown metal and from it, we can define the metal as each metal has its specific heat:

Mw*Cw*ΔTw = Mm*Cm*ΔTm

when 
Mw → mass of water
Cw → specific heat of water
ΔTw → difference in temperature for water 

Mm→ mass of metal
Cw→ specific heat of the metal
ΔTm → difference in temperature for metal

by substitution:

100g * 4.18 * (40-39.8) = 8.23 g * Cm * (50-40)

∴ Cm = 83.6 / 82.3 = 1.02 J/g.°C

when the Cm of the Magnesium ∴ the unknown metal is Mg
You might be interested in
Study the diagram, which represents the general equation for photosynthesis.
Sladkaya [172]

Answer: Y glucose and Z oxygen

Explanation: Just finished the test

3 0
2 years ago
What reagent is <br>used to test for starch<br>​
Elodia [21]

Answer:

iodine

Explanation:

In the presence of starch, iodine turns a blue/black colour. It is possible to distinguish starch from glucose (and other carbohydrates) using this iodine solution test. For example, if iodine is added to a peeled potato then it will turn black. Benedict's reagent can be used to test for glucose.

8 0
3 years ago
Why can't liquids change volume but gasses can?
kupik [55]
Because liquids cant be condensed the way that gasses can for example in a tank of argon you can put 20 cubic feet because it can be be condensed but you could not fit 20 cubic feet of water because it can not be packed together . 
4 0
2 years ago
Read 2 more answers
What is the molarity of a solution made by dissolving 14.8 g of ammonium hydroxide NH4OH, in enough water to make 250.0 mL of so
kicyunya [14]

Answer:

Molarity= 1.69M

Explanation:

m= 14.8, Mm= 35, V= 0.25dm3, C= ?

Moles = m/M= C×V

Substitute and Simplify

m/M= C×V

14.8/35= C×0.25

C= 1.69M

6 0
2 years ago
AYUDENME A CONTESTAR ESTO
Zigmanuir [339]

umm how do you begin answering that ??

8 0
2 years ago
Other questions:
  • During an experiment water was heated in a container covered with a glass lid. The following observations were recorded.
    7·2 answers
  • Neon has 8 electrons in it's outer shell. Does it need to bond? Why or why not?
    13·1 answer
  • Which way of representing a molecule best shows its three-dimensional shape?
    15·1 answer
  • What mass of NH3 (in grams) must be used to produce 5.65 tons of HNO3 by the Ostwald process, assuming an 80.0 percent yield in
    12·1 answer
  • Antoine has a 100-gram sample of water in a sealed 1 liter container. He observes that when the water is moved to a sealed 2-lit
    6·2 answers
  • Diffrent between bryophytes and pteriodphytes
    11·1 answer
  • What is the difference between solution and solute​
    12·1 answer
  • Help pls thnk you!!!!
    15·1 answer
  • I need help. Look at the pictures.
    10·1 answer
  • Can you help give examples of elements, compounds, and mixtures? My friend is having trouble with it.
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!