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den301095 [7]
3 years ago
11

What may have caused these results? accuracy vs precison

Chemistry
1 answer:
Afina-wow [57]3 years ago
7 0

Answer:

Precision and precision are two ways that scientists conceive about mistake. Accuracy refers to how similar a measurement is to an accurate or agreed meaning. Precision refers towards how similar the measurement with the same object is to each other. Precision is separate from precision.

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In a given chemical reaction, the energy of the products is less than the energy of the reactants. Which statement is true for t
HACTEHA [7]

Answer:

Energy is released in this reaction possibly in the form of heat thus it is an exergonic and or exothermic reaction.

The energy is sometimes transferred as heat, inflicting the reaction mixture and its surroundings to become hotter. The temperature increase may be detected employing a measuring device. Some samples of exothermic reactions are: Combustion .An chemical reaction may be a chemical process that releases energy by lightweight or heat.

Explanation:

6 0
3 years ago
Read 2 more answers
QUICK PLEASE HELP!!!during a combustion reaction, 5.00 grams of oxygen reacted with 5.00 grams of CH4.
stealth61 [152]
The balanced chemical reaction is:

CH4 + 2O2 —> CO2 + 2H2O

You need to convert mass to moles (divide by molar mass):

CH4 moles = 5 / 16 = 0.31 mol
O2 moles = 5 / 32 = 0.16 mol

To figure out which reactant is limiting, divide the actual moles by the corresponding coefficient in the reaction:

CH4: 0.31 / 1 = 0.31
O2: 0.16 / 2 = 0.08

O2 is the lower number, so it is the limiting reactant. From the reaction we know it takes 2 moles of O2 to react with each mole of CH4. Therefore, for however many moles of O2 we actually have, half as many moles of CH4 will react. Since we have 0.16 mol of O2, only 0.08 mol of CH4 will react, leaving behind 0.31 - 0.08 = 0.23 mol of CH4.

Now convert back to mass (multiply by molar mass) to find the mass of CH4 remaining:

0.23 x 16 = 3.68g

The closest answer is B.
6 0
3 years ago
What is the mass of 3.95 l of methane gas at 0.870 atm and 35.0 degrees celsius?
dalvyx [7]

Answer:

2.174 gm

Explanation:

PV = nRT       n = number of moles

                       R = gas constant = .082057 L-atm/(K-mol)

                           T must be in units of K

.870 (3.95) = n (.082057)(35+273.15)    

   solve for n = .1359 moles

Methane mole weight (CH4) = 16 gm / mole

.1359 moles  *  16 gm/mole = 2.174 gm

5 0
2 years ago
A partir de lo propuesto por Bohr en 1913, que postulado es correcto:
TEA [102]

Answer:

Primer postulado:

Así Bohr asumió que el átomo de hidrógeno puede existir solo en ciertos estados discretos, los cuales son denominados estados estacionarios del átomo. En el átomo no hay emisión de radiación electromagnética mientras el electrón no cambia de órbita.

Explanation:

4 0
3 years ago
Three alternate energy sources are:
inysia [295]

Answer: coal oil and gas

Explanation:

3 0
3 years ago
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