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Alla [95]
3 years ago
7

Nathan placed 1 cup of sand (S), potting soil, (P), and a mixture of sand and soil (M) into separate containers. In each of the

containers he placed a thermometer so that the bulb was 2.5 cm below the surface. He place the 3 containers under identical heat lamps for an hour. The original temperature of each container was 15C. After heating the jars in three separate trials, the temperatures of the containers were:
Chemistry
1 answer:
lina2011 [118]3 years ago
3 0

Answer:

Sand: 28°C, 27°C, 26°C

Potting soil: 33°C, 29°C, 31°C

Mixture: 29°C, 29°C, 22.5°C.

Explanation:

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Match the compounds as organic (O) or inorganic (I).
SashulF [63]
H2O2(I)
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CO2(I)
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7 0
2 years ago
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Se hace reaccionar 4,00 g de aluminio y 42,00 g de bromo, según la reacción: Al(s)+Br2(l)⟶AlBr3(s) Calcular las moles de AlBr3(s
NeX [460]

Answer:

0.145 moles de AlBr3.

Explanation:

¡Hola!

En este caso, al considerar la reacción química dada:

Al(s)+Br2(l)⟶AlBr3(s)

Es claro que primero debemos balancearla como se muestra a continuación:

2Al(s)+3Br2(l)⟶2AlBr3(s)

Así, calculamos las moles del producto AlBr3 por medio de las masas de ambos reactivos, con el fin de decidir el resultado correcto:

n_{AlBr_3}^{por\ Al}=4.00gAl*\frac{1molAl}{27gAl} *\frac{2molAlBr_3}{2molAl}=0.145mol AlBr_3\\\\n_{AlBr_3}^{por\ Br_2}=42.00gr*\frac{1molr}{160g Br_2} *\frac{2molAlBr_3}{3molBr_2}=0.175mol AlBr_3

Así, inferimos que el valor correcto es 0.145 moles de AlBr3, dado que viene del reactivo límite que es el aluminio.

¡Saludos!

3 0
2 years ago
Which set of coefficients will balance this chemical equation?
Lena [83]

Answer:The answer is D.1,3

Explanation:

8 0
3 years ago
Generally, what happens to the rate of dissolution for a solid solute when you change from stirring a solution to not stirring i
Makovka662 [10]
The rate of dissolution of a solid solute into the solution decreases when you stop stirring it. Generally, stirring increases the dissolution rate of a solid into a solution. An example is coffee with sugar, the sugar dissolves faster when stirred versus when left to dissolve on its own.
6 0
3 years ago
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Which property of matter changes during a chemical change but not during a physical change
andrew-mc [135]

Answer:In a physical change, atoms are not rearranged and the matter's physical and chemical properties are unchanged. Chemical changes, on the other hand, rearrange the atoms of matter in new combinations, resulting in matter with new physical and chemical properties.

Explanation:

easy

8 0
3 years ago
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