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Oduvanchick [21]
3 years ago
10

The specific heat of water is 4.186 J/g°C. A sample of 40. g H subscript 2 O is at an initial temperature of 91.0 °C. If the sam

ple of water released a total of 1,300 joules, what is the approximate final temperature of the water?
a. 74 °C

b. 87 °C

c. 81 °C

d. 83 °C
Chemistry
1 answer:
kati45 [8]3 years ago
7 0
The is 83 degrees outside
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In the gaseous state, chlorine exists as a diatomic molecule Cl2 (Molar mass = 70.9 g/mol). Calculate the number of moles of chl
kap26 [50]

Cl is stable as a diatomic molecule where the 2 Cl atoms are held together by a covalent bond

molar mass of the diatomic molecule is 70.9 g/mol

therefore 70.9 g of Cl₂ is - 1 mol

then 140 g of Cl₂ is - 1/70.9 x 140 = 1.97 mol

there are 1.97 mol of Cl₂ present

8 0
3 years ago
What are protons explained simply
mylen [45]

Answer:

The protons inside an atom's nucleus help bind the nucleus together. They also attract the negatively charged electrons, and keep them in orbit around the nucleus. The number of protons in an atom's nucleus determines which chemical element it is.

8 0
3 years ago
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According to the graph, if you are in a biome where the annual precipitation is about 300 cm and the average temperature is arou
alina1380 [7]

Answer:

We are in Tropical Rainforests.

Explanation:

Biome is basically an ecological region of earth that has specific type of flora and fauna (plants and animals). Every biome has specific abiotic factors like specific climate, temperature, geology, vegetation, soils and relief.

There are total 8 biomes in the world

  • Desert
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  • Temperate Boreal Forest  
  • Chaparral
  • Tropical Savanna
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  • Tundra
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Now in our question, we have been given some conditions and are asked to identify the biome. The annual precipitation is about 300 cm and the average temperature is around 25 degrees Celsius.

Now, if we study the characteristics of all these biomes, it is very simple to identify that the biome is Tropical Rainforest.

Important characteristics of Tropical Rainforest:

  • They receive more than 200 cm of rain each year.
  • The temperature of the biome is between 20 degree Celsius and 25 degree Celsius during the whole year.
  • Around 50 percent of the animal specie of the world are found here.

<em>Note: </em><em>You can study the characteristics of world’s other biomes in the link : http://www.physicalgeography.net/fundamentals/9k.html </em>


Hope it helps!  :)


8 0
3 years ago
Select all the correct answers.
Archy [21]

Answer:

The chemical formula for ammonium hypochlorite is NH4ClO.

The chemical formula for ammonium nitrate is NH4NO3.

Explanation:

These two are correct

4 0
2 years ago
Which type of cell is a rose thorn? prokaryotic eukaryotic plant eukaryotic animal chloroplastic
Ede4ka [16]
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so therefore, A rose thorn is a eukaryotic plant cell.</span>
5 0
3 years ago
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