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Ludmilka [50]
3 years ago
13

What can lead to being curious and also lead to fascinating scientific investigations? a. Questions b. Answers c. Qualitative Me

asurements d. Quantitative Measurements
Chemistry
1 answer:
Ira Lisetskai [31]3 years ago
8 0

Answer:

Questions

Explanation:

The word "science" was obtained from the Latin word "Scire" which means "to know". Hence science is a systematic investigation into the nature of the universe.

Scientific investigations begin with asking questions about the universe. It is this curiosity to know about occurrences in the universe as well as how to solve problems in the universe that leads to fascinating scientific investigations and discoveries.

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How many carbon atoms are represented by the model below? <br>A. 12 <br>B. 5 <br>C. 4 <br>D. 6 ​
solong [7]

Answer:

D. 6

Explanation:

Each pointy end represents 1 carbon. So in total we have six carbons.

The name of this organic compound is hexane.

4 0
2 years ago
Read 2 more answers
Measure out 2.87 moles of sodium chloride (Nacl) into a clean dry cup. ​
Anettt [7]

Answer: weigh is m = n × M = 2.87 mol × 58.44 g/mol

Explanation: mass = amount of substance × molar mass

M((NaCl) = 22.99 +35.45

6 0
3 years ago
Heat moves from what source by convection and radiation?
Alona [7]

Answer:

heat can move from any source but if we are being legitimate it moves from convection

Explanation:

8 0
3 years ago
a cube of iron (cp = 0.450 j/g•°c) with a mass of 55.8 g is heated from 25.0°c to 49.0°c. how much heat is required for this pro
krek1111 [17]
Q = ?

Cp = 0.450 j/g°C

Δt =  49.0ºC - 25ºC => 24ºC

m = 55.8 g

Q = m x Cp x Δt

Q = 55.8 x 0.450 x 24

Q = 602.64 J

hope this helps! 
7 0
3 years ago
Read 2 more answers
A laser produces red light of wavelength 632.8 nm. Calculate the energy,
Ira Lisetskai [31]

Answer:

189.2 KJ

Explanation:

Data Given

wavelength of the light = 632.8 nm

Convert nm to m

1 nm = 1 x 10⁻⁹

632.8 nm = 632.8 x 1 x 10⁻⁹ = 6.328 x 10⁻⁷m

Energy of 1 mole of photon = ?

Solution

Formula used

                     E = hc/λ

where

E = energy of photon

h = Planck's Constant

Planck's Constant = 6.626 x 10⁻³⁴ Js

c = speed of light

speed of light = 3 × 10⁸ ms⁻¹

λ = wavelength of light

Put values in above equation

                   E = hc/λ

                   E = 6.626 x 10⁻³⁴ Js ( 3 × 10⁸ ms⁻¹ / 6.328 x 10⁻⁷m)

                   E = 6.626 x 10⁻³⁴ Js (4.741 x 10¹⁴s⁻¹)

                  E = 3.141 x 10⁻¹⁹J

3.141 x 10⁻¹⁹J is energy for one photon

Now we have to find energy of 1 mole of photon

As we know that

1 mole consists of  6.022 x10²³ numbers of photons

So,

     Energy for one mole photons = 3.141 x 10⁻¹⁹J x  6.022 x10²³

     Energy for one mole photons = 1.89 x 10⁵ J

Now convert J to KJ

1000 J = 1 KJ

1.89 x 10⁵ J = 1.89 x 10⁵ /1000 = 189.2 KJ

So,

energy of one mole of photons = 189.2 KJ

3 0
3 years ago
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