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Over [174]
4 years ago
7

hen a chemical reaction occurs, the physical and chemical properties of the reactants are the same as the properties of the prod

ucts. True False
Chemistry
1 answer:
Doss [256]4 years ago
3 0

Answer: False

Explanation:

In chemical reactions new substances are formed.

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kakasveta [241]

Answer:

A

Explanation:

IF I'm wrong you can get your points back

7 0
3 years ago
Which property is true for metals?
Aleks04 [339]
They're malleable and have high melting and boiling points
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3 years ago
Describe what happens when a liquid is heated to its boiling point
kolezko [41]
Boiling<span> is the process by which a </span>liquid<span> turns into a vapor when it is </span>heated to its boiling point<span>. The change from a </span>liquid<span> phase to a gaseous phase occurs when the vapor pressure of the </span>liquid<span> is equal to the atmospheric pressure exerted on the</span><span>liquid</span>
7 0
3 years ago
How much heat is required to warm 1.50L of water from 25.0C to 100.0C? (Assume a density of 1.0g/mL for the water.)
Masteriza [31]

<u>Answer:</u> The amount of heat required to warm given amount of water is 470.9 kJ

<u>Explanation:</u>

To calculate the mass of water, we use the equation:

\text{Density of substance}=\frac{\text{Mass of substance}}{\text{Volume of substance}}

Density of water = 1 g/mL

Volume of water = 1.50 L = 1500 mL    (Conversion factor:  1 L = 1000 mL)

Putting values in above equation, we get:

1g/mL=\frac{\text{Mass of water}}{1500mL}\\\\\text{Mass of water}=(1g/mL\times 1500mL)=1500g

To calculate the heat absorbed by the water, we use the equation:

q=mc\Delta T

where,

q = heat absorbed

m = mass of water = 1500 g

c = heat capacity of water = 4.186 J/g°C

\Delta T = change in temperature = T_2-T_1=(100-25)^oC=75^oC

Putting values in above equation, we get:

q=1500g\times 4.186J/g^oC\times 75^oC=470925J=470.9kJ

Hence, the amount of heat required to warm given amount of water is 470.9 kJ

6 0
3 years ago
What elements are formed by stars having a mass greater than eight suns?
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An elements like helium and Boron are formed by stars having a mass of one to eight suns. The example elements that are formed by stars having a mass of one to eight suns are helium and boron. The stars normally turns into a white dwarf when the mass of the stars are less than 5 times the mass of the sun.
5 0
3 years ago
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