4 years ago

If my friend lives in the south America and it's summer what is north America having?

Chemistry

1 answer:

LiRa [457]4 years ago

3 0

A biotic factor

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If the pH of a solution is 6.2 what is the [H+] ?

lesantik [10]

Answer:

6.31×10^-7M

Explanation:

pH= -log[H+]

6.2 = -log[H+]

[H+]= antilog(-6.2) = 6.31×10^-7M

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3 years ago

A chemist repeats the gold foil experiment but she uses foil made of aluminum(atomic number 79). How would you expect her result

Tanya [424]

Omg I wish I knew this one sorry

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2.67 grams of butane (C4H10) is combusted in a bomb calorimeter. The temperature increases from 25.68 C to 36.2C. What is the ch

slavikrds [6]

The internal energy : 1310.43 kJ/mol

<h3>Further explanation</h3>

Internal energy (ΔE) can be formulated for Calorimeter :

$\tt \Delta E=C\times.\Delta t$

C= the heat capacity of the calorimeter

Δt=36.2-25.68=10.52°C

$\tt \Delta E=5.73 kJ/^oC\times 10.52^oC=60.2796~kJ$

mol butane(MW=58,12 g/mol)

$\tt \dfrac{2.67}{58,12 }=0.046$

the internal energy (ΔE) in KJ/mol

$\tt \dfrac{60.2796}{0.046}=1310.43~kJ/mol$

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3 years ago

How many grams of gasoline would you need to burn to move your car 2.5 miles which takes 5,375 kJ? (Hrxn= 47kJ/g)

docker41 [41]

Answer:

1.1 × 10² g

Explanation:

The combustion of gasoline releases energy that is used to move the car. The enthalpy of reaction (ΔH°rxn) of the combustion of gasoline is 47 kJ/g, that is, 47 kiloJoule are produced per gram of gasoline burned. The mass of gasoline to be burned to release 5,375 kJ is:

5,375 kJ × 1 g Gasoline/47 kJ = 1.1 × 10² g

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The pH of an aqueous solution of hydrochloric acid is 2. What is the pH of the solution after the addition of 10 g of sodium chl

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Answer:

wala ako alam sagot sorry

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3 years ago