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love history [14]
2 years ago
8

How does the parts of a seed help it carry out its function please try to use your own words it’s for my lab..

Chemistry
1 answer:
satela [25.4K]2 years ago
6 0

\huge\bf\maltese{\underline{\red{J0|N}}}\maltese

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H2 + Br2 → 2HBr If 2.23 g of hydrogen (H2) reacts completely, how many grams of hydrogen bromide (HBr) is formed? (mw Br=79.9) Q
NemiM [27]

Answer:

The correct option is;

B) 179 g

Explanation:

The parameters given are;

Mass of H₂ that takes part in the reaction = 2.23 g

Molar mass of hydrogen gas, H₂ = 2.016 g

Number of moles, n, of hydrogen gas H₂ is given by the relation;

n = \dfrac{Mass \ of \ hydrogen \ gas, \, H_2 }{Molar \ mass \ of  \, H_2 } = \dfrac{2.23}{2.016} = 1.106 \ moles

Chemical equation for the reaction;

H₂ + Br₂ → 2HBr

Given that one mole of H₂ reacts with one mole of Br₂ to produce two moles of HBr

1.106 mole of H₂ will react with 1.106 mole of Br₂ to produce 2 × 1.106 which is 2.212 moles of HBr

The molar mass, of HBr = 80.91 g/mol

The mass of HBr produced = Molar mass of HBr × Number of moles of HBr

The mass of HBr produced = 80.91 × 2.212 = 178.997 g ≈ 179 grams

Therefore, the correct option is B) 179 g.

3 0
4 years ago
The metric system of units is known as the
sweet-ann [11.9K]

Answer:

Centimeters

Explanation:

Lenght cm

4 0
3 years ago
Which is colder dry ice or dioxide gas
Juli2301 [7.4K]
Dioxide gas because ita cooler
6 0
3 years ago
Read 2 more answers
All elements are pure substances.<br><br> True<br><br> False
oee [108]
It can be a compound or a single element. An element is a pure substance that cannot be separated into simpler substances by chemical or physical means. There are about 117 elements, but carbon, hydrogen, nitrogen and oxygen are only a few that make up the largest portion of Earth.
hopefully that helps
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3 years ago
LOOK AT THE IMAGE ABOVE CAN SOMEONE PLEASE DO IT WITH FULL STEPS PLEASE I NEED IT TODAY PLEASE PLEASE I WILL MARK YOU BRAINLIST
Bogdan [553]

answer:

IMAGE IS SUPER UNCLEAR SORRY LUV <3

explanation:

your phone must me from 2009 with that trash camera quality sweetie i suggest you get a new one... oh wait you can't you're broke :(

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3 years ago
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