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klasskru [66]
3 years ago
15

PLZZ!!!- I NEED THIS RIGHT NOWA block is pulled 0.90 m to the right in 2.5 s.

Chemistry
1 answer:
UNO [17]3 years ago
4 0
The average speed is 0.28
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how many moles of silicon are in 245 g of silicon? a. 8.72 mol b. 28.0 mol c. 1.10 10-1 mol d. 6.90 103 mol
Salsk061 [2.6K]
Atomic mass silicon = 28.085 u

1 mol Si ---------------- 28.085 g  
?  ------------------------ 245 g

245 x 1 / 28.085 =><span> 8.72 mol</span>

<span>answer A</span>
7 0
2 years ago
What is the volume of a sample of liquid mercury that has a mass of 76.2g, given that the density of mercury is 13.6g/mL?
nignag [31]
Hey there!

D  = m / V

13.6 = 76.2 / V

V = 76.2 / 13.6

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8 0
3 years ago
Low energy waves have (3 points)
Sergeeva-Olga [200]

Answer:

Low energy waves have <u>a long wavelength.</u>

Explanation:

Energy of wave is directly related to  the frequency while it is inversely proportional to the wavelength.

If any wave have high energy it will have high frequency and smaller wavelength.

If the wave have lower energy then it will have lower frequency and higher wavelength.

Mathematical relationship:

E = h. f

E = h. c/λ

E= energy

h = planck's constant

f = frequency

c = speed of light

λ = wavelength

7 0
3 years ago
Equation of ethane to ethanoic acid
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Preparation of ethanoic acid from ethane This free online course covers the preparation of ethanoic acid from ethane. The Contents tab displays all the lessons ...


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8 0
2 years ago
Given the following information:
bonufazy [111]

Answer:

Ya'll should really practice more because things like these are easy

Explanation:

6 0
2 years ago
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