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Hatshy [7]
4 years ago
8

A bar of copper has a mass of 216g and a volume of 24cm^3. What is the density of copper?

Chemistry
1 answer:
7nadin3 [17]4 years ago
3 0

Answer:

<h2>The answer is 9 g/cm³</h2>

Explanation:

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

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

From the question

mass = 216 g

volume = 24 cm³

The density is

density  =  \frac{216}{24}   \\

We have the final answer as

<h3>9 g/cm³</h3>

Hope this helps you

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During the reaction P4 + 5O 2 P4 O10, 1.5 moles of product was made in 30 seconds. What is the rate of reaction?
Brut [27]

Answer:

850g/min

Explanation:

The reaction expression is given as:

      P₄  +  5O₂   →   P₄O₁₀

Given that:

Number of moles of product  = 1.5moles

Time  = 30s = 0.5min

Unknown:

The rate of the reaction  = ?

Solution:

Convert the moles given to mass of the product.

     So;

     Mass of product  = number of moles x molar mass

Molar mass of P₄O₁₀   = 4(31) + 10(16)  = 284g/mol

    Mass of product  = 1.5moles x 284g/mol  = 426g

So;

 Reaction rate  = \frac{mass of product}{time}   = \frac{426}{0.5}   = 850g/min

8 0
3 years ago
Chemical Equations :p
Nata [24]

Explanation:

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6 0
3 years ago
Which example is a container holding a heterogeneous mixture? * 1 point Bowl of clear chicken broth. Balloon filled with He gas.
Margarita [4]

Answer:

Bowl of clear chicken broth

Explanation:

A bowl of clear chicken broth is a heterogenous mixture.

  • A heterogenous mixture is one in which the constituents exists in at least two different phases.
  • A chicken broth is a heterogenous mixture which exists in the liquid - solid state.
  • The broth is made up of simmered meat, vegetables and other recipes together.

Such mixtures can be:

  1. Gas - liquids mixtures
  2. Liquid - solid mixtures
  3. Gas  - solid mixtures

A broth is an extract from cooking chicken. Some vegetables and extract are mixed together in a nutritious blend.

6 0
3 years ago
What is the Mr of a substance where 1 mole has a mass of 11 g?
iris [78.8K]

Answer:

A mole is the amount of pure substance containing the same number of chemical units as there are atoms in exactly

12 grams of carbon-12 (i.e., 6.023 X 1023).

Explanation:

6 0
3 years ago
When a substance gains electrons in a chemical reaction, the substance is said to be activated. dissociated. reduced. oxidized?
vlada-n [284]
Reduced is the right answer. You can remember it like that if it gains electron that means it will turn negative or will get reduced nuber. So itis reduction
Ihope it will help:)
3 0
3 years ago
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