3 years ago

Which of these is NOT a reason that scientists do experiments?

Chemistry

2 answers:

Marina CMI [18]3 years ago

8 0

To design a procedure

deff fn [24]3 years ago

5 0

Design a new procedure

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2131211.1994 x 102 mL<br> Scientific notation

andreyandreev [35.5K]

Answer:

The answer is 213121119.94. Please mark me brainliest if I helped.

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3 years ago

Pennies are made of zinc coated with copper. Copper has a work function of 4.7 eV. The ozone layer blocks nearly all solar radia

Vadim26 [7]

Answer:

yes it can λ =265 nm

Explanation:

Here we will use the relationship

E = h c/λ ∴ λ = E/ hc where

h= Plank's constant

c= Speed of light

λ = Wavelength = ?

Substituting

note need E in J ,

E = 4.7 eV x 1.602 x 10⁻¹⁹ J/eV = 7.5 x 10⁻¹⁹ J)

λ = 7.5 x 10 ⁻¹⁹ J / ( 6.626 x 10⁻³⁴ Js x 3 x 10^8) = 2.65 x 10⁻⁷ m = 2.65

= 2.65 x 10⁻⁷ m x 1 x 10⁹ nm/m = 265 nm

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3 years ago

Which of these statements best explains why chemistry is flexible? (5 points)

nydimaria [60]

Answer:

2 it cannot be verified?

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2 years ago

Read 2 more answers

What mass of NH3 (g) is produced when 2 x 10^23 molecules of N2 reacts

Ronch [10]

Answer:

m=8.58

Explanation:

$n = \frac{m}{mr}$

N=n÷la

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2 years ago

How many atoms are in 35g of water?

Helga [31]

Explanation:

nH2O=35/18

xH2O=35/18x6.02x10 powered by 23

so, the answer is

$11.70556 \times {10}^{23}$

im sry if im wrong

8 0

3 years ago