An insulated container is used to hold 45.2 g of water at 33.7 °C. A sample of

When aluminum atom loses its valence electron, what is the charge on the resulting <br> ion?

SOVA2 [1]

Answer:

3+

Explanation:

i looked up the answer :)

8 0

3 years ago

Discuss the difference in the densities of the two types of Earth's crust. Why are they different?

Marysya12 [62]

Answer:becus they dont want u go tp center

Explanation:

thy dont want u diggin to da center of da earth

6 0

3 years ago

Determine the oxidation number of<br>Sulphur in Sodium thiosulphate

Semenov [28]

The oxidation number of Sulphur = +2

<h3>Further explanation</h3>

General formula for determining Oxidation Numbers :

1. The number of oxidation of single element atoms = 0. Examples of Ar, Mg, Cu, Fe, N₂, O₂, etc. = 0

Group I : +1

Group II : +2

H in compound = +1, except metal hydride compounds (Hydrogen which binds I or II groups) oxidation number H = -1, for example, LiH, MgH₂, etc.

2. Oxidation number O in compound = -2, except OF2 = + 2 and in peroxide (Na₂O₂, BaO₂) = -1 and superoxide, for example KO₂ = -1/2.

3 The oxidation number in a non-filled compound = 0,

The total amount of oxidation in ion = ion charge, Example NO₃⁻ = -1

Sodium thiosulphate - Na₂S₂O₃

Oxidation number Na = +1 ⇒x2 = +2

Oxidation number O = -2 ⇒x3 = -6

Oxidation number Na₂S₂O₃ = 0

2.Na+2.S+3.O=0

2.+1+2.S+3.(-2)=0

2+2S-6=0

-4+2S=0

2S=4

S=+2

4 0

3 years ago

Give an example how we use science in our every day life

leonid [27]

Answer: When you turn a light on it becomes bright :)

In electrical wiring, a light switch is a switch most commonly used to operate electric lights, permanently connected equipment, or electrical outlets. Portable lamps such as table lamps may have a light switch mounted on the socket, base, or in-line with the cord. Manually operated on/off switches may be substituted by dimmer switches that allow controlling the brightness of lamps as well as turning them on or off, time-controlled switches, occupancy-sensing switches, and remotely controlled switches and dimmers. Light switches are also found in flashlights, vehicles, and other devices.

5 0

3 years ago

Read 2 more answers

Which of the following will increase polymer strain to failure

Blizzard [7]

increase Polymer strain to failure is given below.

Explanation:

Strain to failure gives the measure of how much the specimen is elongated to failure. By this it means that, it you have strain to failure of 3% measured in specimen of length 100 mm, the material will fail when it it elongated 3 mm, as experimented in tensile test. Therefore, for a material with higher strain to failure rate, the ductility is higher and tensile strength is lower.

Tensile strength means the maximum mechanical stress (i.e. applied force divided by (initial) cross-section area of the specimen tested) during a tensile test, which is not directly correlated to the deformability or strain at failure or break since the tensile strength also is affected by the stiffness of the material. Therefore a ductile material might deform on a lower mechanical stress level than a stiffer one (this is the usual case), meaning its tensile strength is lower although its deformability is higher.

Therefore, for a material with higher strain to failure rate, the ductility is higher and tensile strength is lower.

4 0

4 years ago