3 years ago

Please someone help ill give out the brainliest I will pleaseee just help

Chemistry

1 answer:

snow_lady [41]3 years ago

5 0

Answer:

have a great time at y avg be have a great time at all today I was going to answer restroom for spring break is over and over again and again and again and again and again and again your hhhha

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Balance this equation: Al+ HNO3 ---- H2 + Al(NO3)3

romanna [79]

Answer:

2Al+ 6HNO3 ---- 3H2 + 2Al(NO3)3

Explanation:

Put coefficient a,b,c, and d for calculation:

a Al + b HNO3 = c H2 + d Al(NO3)3

for Al: a = d

for H: b = 2c

for N: b = 3d

for O: 3b = 9d

Suppose a=1, then d=1, b=3, c=3/2

multiply 2 to make all natural number, a=2, then b=6, c=3, d=2

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3 years ago

In determining the energy of activation, why was it prudent to run the slowest trial done at room temperature in the hot water b

Katen [24]

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Explanation:

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2 years ago

Can anyone answer this

mariarad [96]

Answer:

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3 years ago

Which element are in the compound CoCI2?<br><br> Choose all correct answers.

Kobotan [32]

Answer:

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2 years ago

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4.Calculate the volume of 40g of Helium (He) at rtp.

Oksana_A [137]

Answer:

2.24dm³

Explanation:

Given parameters:

Mass of He = 40g

Unknown:

Volume of Helium = ?

Solution:

To solve this problem, we convert the given mass to number of moles.

Number of moles = $\frac{mass}{molar mass}$

molar mass of He = 4g/mol

Number of moles = $\frac{4}{40}$ = 0.1mole

So;

1 mole of gas at rtp occupies a volume of 22.4dm³

0.1 mole of He will occupy a volume of 0.1 x 22.4 = 2.24dm³

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3 years ago