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vladimir2022 [97]
3 years ago
14

A square block of steel with volume 10 cm3 and mass of 75 g is cut precisely in half. The density of the two smaller pieces is n

ow...
Chemistry
2 answers:
Temka [501]3 years ago
6 0
It will be the exact same density
UkoKoshka [18]3 years ago
6 0

Answer:

the same

Explanation:

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Polysaccharides always:a. are a string of 3 or more sugar molecules.b. contain lipids.c. are polymers.d. The first and second ch
tamaranim1 [39]

Answer:e. The first and third choices are correct.

Explanation:

7 0
3 years ago
A 642 mL sample of oxygen gas at 23.5°C and 795 mm Hg, is heated to 31.7°C and the volume of the gas expands to 957 mL. What is
Ratling [72]
We can use the combined gas law equation to find the new pressure of the gas. 
\frac{P1V1}{T1} =  \frac{P2V2}{T2}
where P - pressure 
V - volume
T - temperature 
parameters for the first instance are on the left side and parameters for the second instance are on the right side of the equation 
P1 - 795 mm Hg x 0.0013 atm/ mm Hg = 1.033 atm
T1 - 23.5 °C + 273 = 296.5 K
T2 - 31.7 °C + 273 = 304.7 K
substituting the values in the equation 
\frac{1.033 atm *642 mL}{296.5K}=   \frac{P*957mL}{304.7K}
P = 0.712 atm 
the answer closest to this value is A) 0.723 atm
therefore answer is 
<span>A) 0.723 atm</span>
8 0
4 years ago
In this forest, trees block much of the sunlight from reaching the ground. The branches of trees grow up and out to reach as muc
lions [1.4K]
<span>This example represents the challenge of survival of the fittest. In this situation, the trees have a distinct advantage due to their above average height. This puts them in the best position to gain the resources that they need to survive, most notably, the sun. The smaller plants, however, do not have this advantage, and lose out to the trees.</span>
8 0
3 years ago
An experiment reveals that 125.0 grams of an unknown metal increases in temperature from 22.0 oC to 43.6 oC upon absorbing 640 j
nydimaria [60]

Answer:

                     Cp  =  0.237 J.g⁻¹.°C⁻¹

Explanation:

                      Amount of energy required by known amount of a substance to raise its temperature by one degree is called specific heat capacity.

The equation used for this problem is as follow,

                                                 Q  =  m Cp ΔT   ----- (1)

Where;

           Q  =  Heat  =  640 J

           m  =  mass  =  125 g

           Cp  =  Specific Heat Capacity  =  <u>??</u>

           ΔT  =  Change in Temperature  =  43.6 °C  -  22 °C  =  21.6 °C

Solving eq. 1 for Cp,

                                Cp  =  Q / m ΔT

Putting values,

                                Cp  =  640 J / (125 g × 21.6 °C)

                                Cp  =  0.237 J.g⁻¹.°C⁻¹

3 0
3 years ago
2 1.1.4 Quiz: Chemistry of Living Systems
UNO [17]
ITS B. FASHO that’s what I’m think
7 0
3 years ago
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