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iragen [17]
2 years ago
15

StitchXpika plzzzzzzzzz

Chemistry
1 answer:
musickatia [10]2 years ago
7 0

Answer:

Ok so for this chemistry question Stich is probally a typo so lets say sticks Sticks in an x form is common way of Squirrels showing hibernation. This is your answer.

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How many of the following postulates of Dalton's atomic theory are still scientifically accepted? I. All atoms of the same eleme
Neko [114]
<h2>The required "options are (II), (III), and (IV)".</h2>

Explanation:

Postulates of Dalton's atomic theory which are scientifically accepted are:

  • Atoms are indestructible.
  • Compounds are combinations of different atoms.
  • A chemical reaction changes the way atoms are grouped together.

Postulates of Dalton's atomic theory which are not accepted scientifically are:

  • All atoms of the same elements are identical.

            The theory states that the atoms of the same element are identical in every aspect but it is now scientifically proved that the same element should differ in their mass which is known as isotopes.

5 0
3 years ago
PLEASE ANSWER!!! ITS MY LAST QUESTION ON MY TEST AND IT IS GONNA GET ME OFF PROBATION
kap26 [50]

Answer:

A & B

Explanation:

4 0
3 years ago
Read 2 more answers
A 2.61 g sample of a substance suspected of being pure gold is warmed to 72.8 ∘C and submerged into 15.8 g of water initially at
Likurg_2 [28]
 <span>mg = 2.42 g 
Tg = 72.2 deg.C 
mw = 15.8 g 
Tw = 24.5 
Tf = 27 deg. C 
Cw = 4.18 J/g. deg. C 

Energy balance for insulated system, 
ΔE = 0 
ΔUw + ΔUg = 0 
ΔUw = - ΔUg 
Qin = Qout 
mg*cg*ΔTg = mw*cw*ΔTw 
2.42*cg*(72.2 - 27) = 15.8*4.18*(27 - 24.5) 
cg = 1.5095 J/g. deg.C or 1.5095 J/g.K</span><span>
</span>
5 0
3 years ago
Can someone help me with those questions I ask yesterday please​
Doss [256]

Answer:

where

Explanation:

3 0
3 years ago
How much heat is given off when 18.5g of water at 35.0 degrees Celsius freezes to ice at -5.00 degrees Celsius
saveliy_v [14]

9086.3J

Explanation:

Given parameters:

Mass of water = 18.5g

Initial temperature of water = 35°C

Finial temperature = -5°C

Unknown:

Amount of heat given off = ?

Solution:

In converting the water to ice, the water goes through these  processes:

   35°C  to freezing point at 0°C   =  mcΔT

   0°C  of water to 0°C of ice = mL

   0°C of ice to -5°C  = mcΔT

The heat given off;

 H = mc₁ΔT  +  mL  +  mc₂ΔT

m is the mass of water

c₁ is the specific heat capacity of water = 4.2J/g °C

c₂ is the specific heat capacity of ice = 2.03J/g °C

L is the latent heat of fusion = 334J/g

ΔT = T₂ - T₁ = temperature change

H = 18.5 x 4.2 + (0-(-35)) + (18.5 x 334) + (18.5 x 2.03 x (-5 - (0))

H = 2719.5J  + ‬6179J + 187.8J = 9086.3J

learn more:

Specific heat brainly.com/question/7210400

#learnwithBrainly

5 0
3 years ago
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