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Flura [38]
3 years ago
9

a piece of wood sinks in ethanol but floats in gasoline. what can you determine about the three different densities?

Chemistry
2 answers:
lakkis [162]3 years ago
4 0
Wood sinks in ethanol => wood has higher density than ethanol.
wood floats in gasoline=> wood has lower density than gasoline
guapka [62]3 years ago
3 0

Answer: gasoline has more density than wood and wood has more density than gasoline.

Explanation:

Density is defined as the mass contained per unit volume.

\text{Density of substance}=\frac{\text{Mass of a substance}}{\text{Volume of a substance}}

A substance having more density will sink at the bottom and the substance having less density will float at the top.

As the wood sinks in ethanol , it means wood has more density than ethanol.

As the wood floats in gasoline, it means wood has less density than gasoline.

Hence, the order of density will be gasoline > wood > ethanol.

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denis23 [38]

Answer:

1.The metalloids; boron (B), silicon (Si), germanium (Ge), arsenic (As), antimony (Sb), tellurium (Te), polonium (Po) and astatine (At) are the elements found along the step like line between metals and non-metals of the periodic table.

2.hydrogen

The elements generally classified as nonmetals include one element in group 1 (hydrogen);

3.element iron

The element iron is in group 8, and therefore has two or three apparent valence electrons.

8 0
3 years ago
Calculate the molarity of 13.1 g of NaCl in 727 mL of solution
valentina_108 [34]

Answer:

The molarity of the solution is 0,31 M

Explanation:

We calculate the weight of 1 mol of NaCl from the atomic weights of each element of the periodic table. Then, we calculate the molarity, which is a concentration measure that indicates the moles of solute (in this case NaCl) in 1000ml of solution (1 liter)

Weight 1 mol NaCl= Weight Na + Weight Cl= 23 g + 35, 5 g= 58, 5 g

58, 5 g-----1 mol NaCl

13,1 g ---------x= (13,1 g x 1 mol NaCl)/58, 5 g= 0, 224 mol NaCl

727 ml solution------ 0, 224 mol NaCl

1000ml solution------x= (1000ml solutionx0, 224 mol NaCl)/727 ml solution

x=0,308 mol NaCl---> <em>The solution is 0,31 molar (0,31 M)</em>

5 0
3 years ago
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The structure of tofacitinib with all the filled hydrogen atoms is the second attached picture.

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All tropical cyclones can produce widespread torrential rains, which cause massive flooding and trigger landslides and debris flows.

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