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kow [346]
4 years ago
14

Who wants to be friends

Chemistry
2 answers:
Slav-nsk [51]4 years ago
7 0
Sure I can be friends with u xd
maks197457 [2]4 years ago
5 0

Answer:

YESSSSSSSS

Explanation:

I have the same name as you!

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A metal tank containing hydrogen gas has a pressure gauge that reads 575 psi. What is causing the pressure inside of the tank?
liberstina [14]

Answer:

Compression of hydrogen gas within the container.

6 0
3 years ago
what is the atomic number of an element with a atomic weight of 77cwnd 55 neutrons? Please help fast!
Ronch [10]

Answer:

the atomic number of the element with 77 as atomic weight and 55 neutrons is 22

6 0
3 years ago
How many moles of O2 are required to react completely with 1.396 g of Fe?
Gelneren [198K]

Answer:

moles O₂ needed = 0.19 mole

Explanation:

4Fe(s) + 3O₂(g) => 2Fe₂O₃(s)

1.396g Fe(s) = 1.396g/56g/mol = 0.025 mole Fe(s)

0.025 mole Fe(s) reacts with 3/4(0.025 mole O₂(g) = 0.019 mole O₂(g)

5 0
4 years ago
What do you know for sure after one test? Two tests? Three tests?
Zanzabum
That you have to do better
8 0
3 years ago
A 2.600×10−2 M solution of glycerol (C3H8O3) in water is at 20.0∘C. The sample was created by dissolving a sample of C3H8O3 in w
sesenic [268]

Answer:

A. 0.2395 w/w %

B. 2394ppm

Explanation:

A. To find concentrationin percent by mass of the solution we need to calculate mass of glycerol and mass of water. The formula is:

Mass glycerol / Total mass * 100

<em>Mass glycerol:</em>

The solution is 2.6x10⁻²moles / L. As there is 1L of solution there are 2.6x10⁻² moles of glycerol. In mass (Using molar mass glycerol: 92.09g/mol):

2.6x10⁻² moles of glycerol * (92.09g / mol) = 2.394g glycerol

<em>Mass of water:</em>

998.9mL and density = 0.9982g/mL:

998.9mL * (0.9982g/mL) = 997.1g of water.

That means percent by mass is:

% by mass: 2.394g / (997.1g + 2.394g) * 100 = 0.2395 w/w %

B. Parts per million are mg of glycerol per L of solution. As in 1L there are 2.394g. In mg:

2.394g * (1000mg / 1g) = 2394mg:

Parts per million: 2394mg / L = 2394ppm

3 0
3 years ago
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