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Anna [14]
3 years ago
5

Scientists can identify an element by looking at the structure of a single A.molecule. B.electron. C.neutron. D.atom.

Chemistry
1 answer:
Studentka2010 [4]3 years ago
3 0
By looking a an molecule
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What means having to do with the senses.
Nuetrik [128]
Sensory is the answer to your question .
4 0
3 years ago
Atoms was determined to be 143 picometers. What is the percent error of this measured value?
jonny [76]

Answer:

9.1% error

Explanation:

Full Question:

  • A measured value for the atomic radius of platinum atoms was determined to be 143 picometers. What is the percent error of this measured value?
8 0
3 years ago
How much energy has your body used, in joules, if your health indicates the 450 Calories were burned during your workout? How ma
11Alexandr11 [23.1K]

Answer:

107.55 J, 88.67 cal

Explanation:

1 Joule = 0.239 Calories

450 cal x 0.239 = 107.55 J

3.5 x 106 = 371

371 J = 371 x 0.239 cal

371 J = 88.67 cal

3 0
4 years ago
What is the volume in L of a 0.825 mole sample of Ar at 600 mm Hg and 300 K?
Natali5045456 [20]

Answer:

V = 25.7 L

Explanation:

To find the volume of Argon (Ar), you need to use the Ideal Gas Law equation. This looks like:

PV = nRT

In this formula,

        > P = pressure (atm)

        > V = volume (L)

        > n = number of moles

        > R = constant (0.0821 L*atm/K*mol)

        > T = temperature (K)

While there is a different constant that can be used if you want to keep the pressure in mmHg, there is a more common constant used when the pressure is in atm. So, to find the volume, you need to (1) convert mmHg to atm (by dividing by 760) and then (2) calculate the volume (using Ideal Gas Law).

<u>(Step 1)</u>

600 mm Hg              1 atm
-------------------  x  ---------------------  =  0.789 atm
                              760 mm Hg

<u>(Step 2)</u>

PV = nRT

(0.789 atm) x V = (0.825 mole)(0.0821 L*atm/K*mol)(300 K)

(0.789 atm) x V = 20.32

V = 25.7 L

5 0
2 years ago
2000 km/sec. Convert that to<br> m/sec.
koban [17]

Answer:

2000 km/sec

1km=1000m

2000×1000

2000,000 m/sec

4 0
4 years ago
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