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iogann1982 [59]
3 years ago
6

Is each of the following a physical or chemical property? ● melting point ● ability to react ● color ● density ● ability to burn

● ability to rust ● magnetism ● boiling point ● hardness ● conductivity Is each of the following a physical or chemical change? ● a puddle evaporating ● adding food coloring to water ● cutting an apple ● denting a piece of metal ● dry ice sublimating ● iron rusting ● limewater (a liquid) and carbon dioxide (a gas) forming chalk (a solid) ● paper burning ● vinegar and baking soda making bubbles ● water boiling
Chemistry
1 answer:
ryzh [129]3 years ago
5 0
These are definitely chemical properties
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An atomic model shows 19 protons, 20 neutrons, and 19 electrons. What is the mass number of the atom?
agasfer [191]
The mass number of the atom is 39
7 0
3 years ago
According to the Law of Conservation of Mass, the total
dimulka [17.4K]

Answer:

Always equal to the total moles of the products.

Explanation:

The law of conservation of mass states that mass in an isolated system is neither created nor destroyed by chemical reactions or physical transformations. According to the law of conservation of mass, the mass of the products in a chemical reaction equal to the mass of the reactants.

8 0
2 years ago
a gas has a volume of 750ml at pressure of 2.15atm what will the pressure be if the volume is 1.25ml​
Dmitry [639]

Answer:

1290 atm

Explanation:

P1V1=P2V2

P2= (P1V1)/V2

P2=(2.15 atm * 750 mL)/(1.25 mL)

P2=1290 atm

6 0
3 years ago
Which substance is an example of a nonpolar compound?(1 point)
Tatiana [17]
The answer is B - vegetable oil.

Explanation:

The properties of liquids depend on the attractions the molecules of the liquid have for each other and for other substances.

Liquids can dissolve certain other liquids, depending on the attractions between the molecules of both liquids.

Polar liquids, like water, dissolve other liquids which are polar or somewhat polar.

Polar liquids, like water, do not dissolve non-polar liquids like oil.
8 0
3 years ago
A pinball bangs against a bumper, giving the ball a speed of 4. 5 m/s. If the ball has a mass of 50.0 g, what is the ball’s kine
Daniel [21]

Answer:

K.E =  0.5 j

Explanation:

Given data:

Mass of ball = 50 g (50/1000 =0.05 kg)

Speed of ball = 4.5 m/s

K.E of ball = ?

Solution:

Formula:

K.E = 1/2 m.v²

Now we will put the values in formula

K.E = 1/2 (0.05 kg) (4.5 m/s)²

K.E = 1/2 (0.05 kg) 20.25 m²/s²

K.E = 1/2 (1.0 kg. m²/s²)

K.E =  0.5 kg. m²/s²

j = kg. m²/s²

K.E =  0.5 j

6 0
3 years ago
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