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Andre45 [30]
1 year ago
10

A treasure chest is full of coins. The chest has a volume of 2.25L. The coins have a combined mass of 48kg. Calculate the densit

y of the coins to determine which metal they’re made of. Which metal are they?
a. Silver: 10.5 g/mL
b. Lead: 11.3 g/mL
c. Bronze: 8.7 g/mL
d. Gold: 19.3 g/mL
Chemistry
1 answer:
Softa [21]1 year ago
8 0

The density of the coin, given the data from the question is 21.33 g/mL.

<h3>What is density? </h3>

The density of a substance is simply defined as the mass of the subtance per unit volume of the substance. Mathematically, it can be expressed as

Density = mass / volume

<h3>How to determine the density of the coin</h3>

From the question given above, the following data were obtained:

  • Volume of coin = 2.25 L = 2.25 × 1000 = 2250 mL
  • Mass of coin = 48 Kg = 48 × 1000 = 48000 g
  • Density of coin =?

Density = mass / volume

Density = 48000 / 2250

Density = 21.33 g/mL

<h3>How to determine the metal</h3>

The density of the coin obtained, given the data from the question is 21.33 g/mL

Considering the options given, the density of the metal is not specified.

Learn more about density:

brainly.com/question/952755

#SPJ1

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The addition of NaOH to water would result in which of the following?
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Answer:

A decrease in [H3O+] and an increase in pH (option a)

Explanation:

Equilibrium of water is shown in this equation

2H₂O  ⇄  H₃O⁺  +  OH⁻

When you add NaOH, you are modifying [OH⁻]

NaOH  →   Na⁺  +  OH⁻

In equilibrium of water, the [OH⁻] increases

2H₂O   ⇄   ↓  H₃O⁺   +   OH⁻  ↑

As the [OH⁻] increases, by Le Chatellier, the equilibrium tends to decrease [H₃O⁺].

If the [OH⁻] is higher, pH  is also high so the solution of water and sodium hydroxide would be totally basic.

3 0
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A specific brand of gourmet chocolate candy contains 7.00 g of dietary fat in each 22.7-gpiece. How many kilograms of dietary fa
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Answer:  0.14 kg

Explanation:

Gourmet chocolate candy contains 7.00 g of dietary fat in each 22.7-g piece

That is 1 piece of candy weighs 22.7 g and contains 7.00 g of dietary fat

Converting the mass in pounds to kg  

1 lb = 0.45 kg = 450 grams    (1kg=1000g)

Number of pieces = \frac{450}{22.7g}=20pieces

1 piece contains = 7 g of dietary fat

Thus 30 pieces would contain =\frac{7}{1}\times 20=140g of dietary fat

1 g = 0.001 kg

Thus 140 grams =\frac{0.001}{1}\times 140=0.14kg

Thus 0.14 kg of dietary fat are in a box containing 1.00 lb of candy.

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