3 years ago

Why are facts and data important to science?

Chemistry

1 answer:

lara31 [8.8K]3 years ago

3 0

Answer:

to bring more technology

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A crystallographer measures the horizontal spacing between molecules in a crystal. The spacing is

Brilliant_brown [7]

But what is the width of the molecule

5 0

3 years ago

Which of these objects is made of cells?<br> A. rocks B. snow C. trees D. water

Umnica [9.8K]

Answer:

I think it's trees

Explanation:

I'm not 100% sure tho

8 0

3 years ago

Calculate the pH of a 0.0350M

Triss [41]

Answer:

pH = 12.544

Explanation:

NaOH → Na+ + OH-

0.0350M 0.0350M 0.0350M.........equilibrium

∴ pOH = - log [OH-]

∴ pH + pOH = 14

⇒ [OH-] = 0.0350 M

⇒ pOH = - Log (0.0350)

⇒ pOH = 1.456

⇒ pH = 14 - 1.456

⇒ pH = 12.544

6 0

3 years ago

Read 2 more answers

Why is BrCl5 nonpolar when it's Asymmetrical? Aren't symmetrical molecules suppposed to be polar?

Svet_ta [14]

Although there exists a dipole moment in the molecule, I guess its nonpolar because the dipole is very small as the electronegativity difference between the Br and Cl is very low and so it can be neglected.

8 0

4 years ago

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The density of a pure substance is its mass per unit volume. The density of ethylene glycol has been measured to be 1097.gL. Cal

Svetlanka [38]

Answer: The mass of 405 mL of ethylene glycol is 444.3 g.

Explanation:

Density is defined as the mass contained per unit volume.

$Density=\frac{mass}{Volume}$

Given :

Density of the ethylene glycol= $1097g/L$

Volume of the ethylene glycol= $405ml$ = 0.405 L (1L=1000ml)

Mass of the ethylene glycol = ?

Putting in the values we get:

$1097g/L=\frac{x}{0.405L}$

$x=444.3g$

Thus the mass of 405 mL of ethylene glycol is 444.3 g

5 0

3 years ago