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jolli1 [7]
3 years ago
6

Does this seem like a good hypothesis?

Chemistry
1 answer:
kondaur [170]3 years ago
6 0
Yeah it uses some valuable scientific vocabulary and background knowledge, I hope this hypothesis will be good enough for your teacher (don't worry it will be)
You might be interested in
100 ml of a 2.4 m solution is diluted to a final volume of 250 ml what is the new molarity
HACTEHA [7]

Answer:

The new molarity is 0,96 M.

Explanation:

A dilution consists of the decrease of concentration of a substance in a solution (the higher the volume of the solvent, the lower the concentration).

We use the formula for dilutions:

C1 x V1 = C2 x V2

2,4 M x 100ml = C2 x 250 ml

C2= (2,4 M x 100ml)/250 ml

<em>C2= 0,96 M</em>

8 0
3 years ago
A sample of helium gas has a volume of 2.0 L at a pressure of 4.0 atm. What is the volume of gas at 380 mmHg
Lilit [14]
From equation;
P1V1=P2V2
V2=P1V1÷P2
since P2=380mmHg
now;1atm=760mmHg
how about 380mmHg is equal to how many atm?
380×1÷760=0.5atm
P2 now is equal to 0.5atm
back from equation;
P1V1=P2V2
V2=P1V1÷P2
V2=4.0atm×2.0L÷0.5atm
V2=16L
therefore V2=16L.
5 0
3 years ago
Write a chemical equation representing the second ionization energy for lithium. Use e− as the symbol for an electron.
zloy xaker [14]

Answer: Li^+ (g) ----> Li^2+ (g) + e^-

5 0
3 years ago
How many molecules are in 128g of H2O?
Lelechka [254]

Answer:

4.28x10^24 molecules

Explanation:

From Avogadro's hypothesis, 1mole of any substance contains 6.02x10^23 molecules. From the above, we understood that 1mole of H2O also contains 6.02x10^23 molecules.

1mole of H2O = (2x1) + 16 = 2 + 16 = 18g

Now, if 18g of H2O contains 6.02x10^23 molecules,

Then 128g of H2O will contain = (128x 6.02x10^23) /18 = 4.28x10^24 molecules

3 0
3 years ago
A piece of metal has a volume of 38 cm and a mass of 277 g calculate the density of the metal
anyanavicka [17]
Density
=mass÷volume
=277÷38
=7.29 g/cm3
6 0
3 years ago
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