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myrzilka [38]
2 years ago
15

When we make observations or measurements in science this is called the​

Chemistry
1 answer:
satela [25.4K]2 years ago
7 0
It is called the scientific method
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A rigid container of gas has a pressure of 1.72 atm and temperature of 21 oC. If the temperature increases to 85 oC, what is the
Vinil7 [7]

Answer:

the new pressure is 2.09 atm

Explanation:

you have to use gay lussac's law so the formula is

p1/t1 = p2/t2

and convert C to Kelvin k=C+273.15

1.72atm/294.15 = p2/358.15

solve for p2 by multiplying 358.15 on both sides

p2=2.09 atm

5 0
3 years ago
How much 0.02 m kmno4 solution should be needed if the solutions tested have a composition of 3% h2o2 by mass?
Nostrana [21]
When the concentration is expressed in mass percentage, that means there is 3 g of solvent H₂O₂ in 100 grams of the solution. Then, that means the remaining amount of solute is 97 g. We use the value of molarity (moles/liters) to determine the amount of solution in liters, denoted as V. The solution is as follows:

0.02 mol KMnO4/L solution * 158.034 g KMnO4/mol * V = 97 g KMnO4

Solving for V,
V = 30.69 L
6 0
3 years ago
In which situation would osmosis most likely occur in cells?
Rufina [12.5K]

Answer:

it would most likely occur

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Across a semi-permeable membrane that separates solutions of different concentrations

———————————————————————————————————————

this is because osmosis is the ‘net’ movement of molecules from a ‘region’ of ‘higher concentration’ to a ‘region’ of ‘lower concentration’ ‘down the concentration gradient’.

3 0
3 years ago
Read 2 more answers
What are three methods of measuring the volume of an object?
Anarel [89]
L×w×h=v
length times width times height equals volume
the order in which you multiply does not matter
5 0
3 years ago
What function does adding a coefficient in a chemical equation serve?​
shtirl [24]

Answer:

coefficients increase the products to increase the efficiency of the reaction.Coefficients balance the equation with respect to the law of conversation of mass. coefficients also increases the reactants to help the reaction proceed.

3 0
4 years ago
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