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aleksley [76]
3 years ago
7

PLS HELP THIS IMPORTANT

Chemistry
2 answers:
Ksenya-84 [330]3 years ago
8 0

Answer:

Explanation:

Physical change is a temporary and reversible change in which the physical properties of the substance changes without altering the composition of the substance Eg Melting of ice while chemical change is a permanent and not so easily reversible change in which the identity of the substance is altered to produce one or more substances Eg Combustion

sergey [27]3 years ago
6 0

Answer:

Physical change is a rapid change, while chemical change can be a time taking process. In chemical change, new products are produced, while physical change can change the shape or size of said object, but no new products are formed.

Explanation:

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What is a decay series?
Ulleksa [173]

Answer:

a chain of decays that result in a stable nucleus

Explanation:

Decay series is a series of decay in which radioactive element is decomposed in different elements until it produces one stable atom.

5 0
3 years ago
Read 2 more answers
How will the temperature of the surface change?
kogti [31]

Answer:

o Surface Type- Because the atmosphere is heated by the Earth's surface, the surface type plays an important role in the surface air temperature. o Elevation and Aspect- Higher altitude generally has colder temps b/c the air is less dense and there are fewer molecules to absorb incoming solar radiation.

The Earth's surface is actually what heats the air above it.  

Explanation:

The energy from the sun is "short-wave", and as such air is transparent to it. The sunlight goes right through the air without heating it at all. This "short-wave" radiation is absorbed by the Earth which then heats up. The heated Earth then emits it's own radiation but it is in the infrared part of the spectrum or "long-wave" radiation. This heat is what warms the atmosphere.

4 0
2 years ago
A gas at 20.0°C and 52.1 mL is heated to 93.5°C. What is the new volume?
lawyer [7]
\frac{ V_{1} }{ T_{1} } = \frac{ V_{2} }{ T_{2} }
V_{1} = 0.0521 L
T_{1} = 293.15 K
T_{2} = 366.65 K

Solve for V_{2}

\frac{0.0521 L}{293.15 K} = \frac { V_{2} }{366.65 K}

V_{2} = 0.06516 L or 65.2 mL
7 0
3 years ago
What coefficients would balance the following equation?<br><br> __C2H6 + __O2 → __CO2 + __H2O
lina2011 [118]
2C2H6 + 7O2 → 4CO2 + 6H2O
3 0
3 years ago
What percentage of 8 is 40?​
icang [17]

Answer:

gg

40%‰

Explanation:

3 0
3 years ago
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