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xz_007 [3.2K]
3 years ago
5

What state of matter is the pumpkin

Chemistry
2 answers:
otez555 [7]3 years ago
6 0
Solid......imma guess
irina1246 [14]3 years ago
4 0
Ummm.... I'm assuming its a solid.... Unless it's dissloved into itself.
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How much heat, in joules, must be added to a 75.0-g iron block with a specific heat of 0.449 J/g °C to increase its temperature
svp [43]

Answer:

50,849.25 Joules

Explanation:

The amount of heat, Q, required to raise the temperature of a body with mass, m, and specific heat capacity, c is given by:

Q = mcΔT, where ΔT represents the change in temperature.

In the case of the iron block:

m = 75 g

c = 0.449 J/g °C

ΔT = 1535 - 25 = 1510 °C

Therefore,

Q = 75 g x 0.449 J/g °C x 1510 °C

     = 50,849.25 Joules

<em>Hence, </em><em>50,849.25 Joules </em><em> of heat must be added to  a 75.0-g iron block with a specific heat of 0.449 J/g °C to increase its temperature from 25 °C to its melting temperature of 1535 °C</em>

5 0
2 years ago
Guys, please, please help!!
shutvik [7]
Ookay 

1) T 
2) T
3) F

Hope i helped :)

6 0
3 years ago
Read 2 more answers
What is the hydrogen ion concentration of a substance with a pH of 4.5?​
FrozenT [24]

Answer:

The hydrogen ion concentration of the substance is 3.16*10⁻⁵ M

Explanation:

pH is a parameter used to measure the degree of acidity or alkalinity of a substance. The pH is calculated as the negative logarithm (base 10) of the concentration of hydronium ions [H₃O⁺] or hydrogen ions [H⁺].

pH= - log [H₃O⁺]= - log [H⁺]

Values ​​on the pH scale range from 0 to 14, where pH equal to 7 is neutral, below 7 is acidic and above 7 is basic.

In this case, pH= 4.5

So:

4.5= - log [H⁺]

Solving:

[ H⁺]= 10⁻⁴ ⁵

[H⁺]= 3.16*10⁻⁵ M

The hydrogen ion concentration of the substance is 3.16*10⁻⁵ M

7 0
3 years ago
All the following are compounds except. A.water. B.sugar solution. C.aqueous. D.sulphur dioxide
kap26 [50]

Answer:

B.sugar solution

Explanation:

A sugar solution is not a compound.

Rather, the solution is a mixture and an impure substance.

  • A compound is composed of two or more kinds of atoms or elements joined in a definite grouping .
  • The properties of the compound is distinct from those of the individual atoms that makes them.
  • Sugar solution is sugar and water
  • It is made up of two compounds not chemically combined.
5 0
3 years ago
Aluminum has a density of 2.7 g/cm3. If a chunk of aluminum with a mass of 10.8 g is placed in a graduated cylinder partially fi
alisha [4.7K]
 The  water  level that will   rise  is  4  cm^3

calculation

if the density  i s   2.7 g/cm^3  this implies that   

 1cm^3  =  2.7 g
    ?        = 10.8  g

by  cross  multiplication

 (1 cm^3   x 10. 8 g) /2.7  g   =  4  CM^3
6 0
3 years ago
Read 2 more answers
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