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Mkey [24]
3 years ago
6

A student measures a mass of an 8cm3 block of brown sugar to be 19.9G. what is the density of the brown sugar?

Chemistry
1 answer:
Naily [24]3 years ago
3 0

Answer:

<h2>2.49 g/cm³</h2>

Explanation:

The density of a substance can be found by using the formula

density =  \frac{mass}{volume} \\

From the question we have

density =  \frac{19.9}{8}  \\  = 2.4875

We have the final answer as

<h3>2.49 g/cm³</h3>

Hope this helps you

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A beam of light has a wavelength of 24.0 μm ( μm = 10 -6m). What is its frequency?
vfiekz [6]

Answer:

Frequency = 1.25 ×10¹³ Hz

Explanation:

Given data:

Wavelength of light = 24.0  μm (2.4 ×10⁻⁵ m)

Frequency = ?

Solution:

Formula:

Speed of light = wavelength × frequency

Speed of light /wavelength = frequency

Frequency = 3×10⁸ m /s /2.4 ×10⁻⁵m

Frequency = 1.25 ×10¹³ s⁻¹

s⁻¹ = Hz

Frequency = 1.25 ×10¹³ Hz

6 0
3 years ago
What is parallax?
sashaice [31]

Answer:

B

Explanation:

Because it is viewed in a different place

5 0
3 years ago
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A 25.00 ml sample of h3po4 solution is neutralized by exactly 54.93 ml of 0.04345 m ca(oh)2. what is the molarity of the h3po4 s
son4ous [18]
The neutralization equation is:
3 Ca(OH)₂ + 2 H₃PO₄ → Ca₃(PO₄)₂ + 6 H₂O

From this equation we can see that 3 moles of Ca(OH)₂ react with 2 moles of H₃PO₄

Numbers of mmol of Ca(OH)₂ = M x V = 0.04345 x 54.93 = 2.387 mmol

Number of mmol of H₃PO₄ = 2.387 x (2/3) = 1.591 mmol

Molarity of solution = n (mmol) / V(ml) = 1.591 / 25 = 0.0636 M
8 0
3 years ago
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How much energy is contained in a particle that has a mass of m = 1 ug
Fudgin [204]

Answer:

90MJ

Explanation:

Energy= mc^2

Where c= speed of light

m= mass of the object

Mass= m = 1 ug ( then we need to convert from micro gram to micro Joule)= 0.000000001

C= 3× 10^8 m/s

E= = [0.000000001 × (3× 10^8 )^2]

E = [0.000000001 × 89 875 517 873 681]

= 89 875 517.9 joule

Then we can convert to megajoules as

90MJ

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3 years ago
How many grams are needed to prepare 1.50L of a 1.50M solution of NaNO3?
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