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Sloan [31]
2 years ago
9

How many molecules are contained in 5.7 gms of CaCO3​

Chemistry
1 answer:
Dominik [7]2 years ago
8 0
100grams of caco3 contains full 6.022x10^23 molecules
So 5.7 will contain= 3.432x10^22
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An atom of gold has a mass of 3.271 x 10-22g. How many atoms of gold are in 5.00g of gold?
rosijanka [135]
To get the number of gold atoms, you have to divide the mass of the gold by the mass of the gold atom. It follows this simple equation  \frac{mass of gold}{mass of gold atom}. 

Let x be the number of gold atoms. Plug in the values to a calculator.

x = \frac{5.00g}{3.271 x 10-22g}
Both have the same units so the unit gram(g) can be cancelled. 
x then would be equal to 1.53x10^22. So there are 1.53x10^22 atoms of gold in 5 g of gold
3 0
3 years ago
Which of these describes an ethical dilemma that drug designers could face?
LenKa [72]

The statement 'whether people should take medicine or if they should seek alternative treatments' describes an ethical dilemma that drug designers face.

<h3>What is drug development?</h3>

Drug development refers to all the processes from target drug identification to drug validation and commercialization.

Drug development involves different stages of development including preclinical and clinical trials.

Ethical dilemmas in drug development include the release of a drug that is ineffective when compared to parallel treatments.

Learn more about drug development here:

brainly.com/question/8187660

4 0
2 years ago
The density of a rock that was a mass of 454 grams and a volume of 100 cm3
puteri [66]

Answer:

The answer is

<h2>4.54 g/cm³</h2>

Explanation:

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

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

From the question

mass of rock = 454 g

volume = 100 cm³

The density of the rock is

density =  \frac{454}{100}  =  \frac{227}{50}  \\

We have the final answer as

<h3>4.54 g/cm³</h3>

Hope this helps you

3 0
3 years ago
A block of wood has a density of 0.6g/cm cubed and a volume of 1.2g/cm cubed. What is the mass of the block of wood?
Rus_ich [418]
<span>0.6 = mass/1.2 </span>
<span>mass = 0.6 x 1.2 </span>
<span>= 0.72 g </span>

3 0
3 years ago
Seaweed attached to rocks in the ocean performs photosynthesis underwater. Which statement best explains how some seaweed can su
tia_tia [17]

Answer:

It can use a small amount of sunlight for photosynthesis

Explanation:

Seaweeds are a group of marine plants/algae that grow attached to rocks underwater. However, despite their depth underwater, they still perform photosynthesis, which is a process that requires energy from sunlight.

Seaweeds are able to perform photosynthesis underwater because they are efficient users of sunlight energy. Hence, they require only a small amount of sunlight that penetrates the ocean to perform photosynthesis.

8 0
3 years ago
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