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Tom [10]
3 years ago
11

Which one of these are correct?

Chemistry
1 answer:
Sergio [31]3 years ago
3 0

The correct answer is the one in the middle. Mixing food coloring and water

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The total number of valence electrons in the phosphate ion is
Vitek1552 [10]

Answer:

32

Step-by-step explanation:

There are two ways you can count the valence electrons.

A. From the Periodic Table

1 × P (Group 15)               =   5

4 × O (Group 16) = 4 × 6 = 24

+3 e⁻ (for the charges)   = <u>  3</u>

                              Total = 32

B. From the Lewis structure

In the <em>Lewis structure</em> (below), each line (bond) represents a pair of bonding electrons, and each dot represents an unbound electron (half a lone pair).

5 lines (bonds)                    = 5 × 2 = 10

3 single-bonded O atoms = 3 × 6 = 18

1 double-bonded O atom              = <u>  4</u>

                                              Total = 32

4 0
4 years ago
if 0.582 moles of zinc reacts with excess lead(IV) sulfate how many grams are zinc sulfate would be produced?
NemiM [27]
<span>Chemical reaction is:
Zn+PbS<span>O4</span>→ZnS<span>O4</span>+P<span>b
</span></span>From the balanced equation 2 moles of Zn make 2 moles of ZnSO4 

<span>You have 0.534 moles of zinc so you make 0.534 moles of ZnSO4. </span>
Molar mass of ZnSO4 = 161 g/mol
mass = no of moles * molar mass
mass = 0.534 * 161
mass = 85.974 g
6 0
3 years ago
Classify the following processes as exothermic or endothermic: (e) a person growing;
Lisa [10]

A response that is chemical in nature and is characterized with the aid of the release of power in the shape of warmth or light is referred to as an exothermic response.

Following processes are exothermic:-

freezing of water.

digestion of food.

a person running.

heating with a furnace.

Following processes are endothermic:-

boiling of water.

a person growing.

wood being chopped.

Endothermic reactions are chemical reactions wherein the reactants soak up warmness electricity from the environment to shape products. those reactions decrease the temperature of their surrounding place, thereby growing a cooling impact.

DISCLAIMER:- Your question is incomplete , see full question below:-

Classify the following processes as exothermic or endothermic:

(a) freezing of water.

(b) boiling of water.

(c) digestion of food.

(d) a person running.

(e) a person growing.

(f) wood being chopped.

(g) heating with a furnace.

Learn more about exothermic here:- brainly.com/question/2924714

#SPJ4

3 0
2 years ago
Do you agree / disagree - Light is always the same, even when it is emitted by different light sources (like the sun and a light
Ilia_Sergeevich [38]

Answer:

She's right that there's a difference, and you are right that it's all just electromagnetic waves!

The key to this is that there is no such thing as "white light" when you really get down to it. Each light emits a range of wavelengths of light. If they have a sufficiently even distribution of wavelengths, we tend to call that light "white," but we can only use that term informally.

Both the sun and the light bulb emit so-called "Blackbody radiation." This is the particular spectrum of light that's associated with the random thermal emissions of a hot object. Cool objects tend to emit more of their energy in the longer wavelengths like reds and IRs, while hotter objects emit more energy in the shorter wavelengths like blues and UV.

Blackbody graphic

(Note, there are other possible emission spectra, but those are associated with different materials doing the emissions and, for the purposes of this discussion, they aren't too important. We can just claim the emissions are all blackbody)

If you notice, as you get hotter, a larger portion of the energy is emitted in the blue, violet, and ultraviolet. That's how you get a sunburn from the sun. It's harder to get a sunburn from an artificial light, not because it's artificial, but because those lights are almost always cooler than the sun. They don't have as much UV content. Instead, they have more red and yellow, which incidentally is why pictures taken indoors look very yellow. If you use a strobe, however, all those yellow hues go away because a strobe light is very warm, with lots of blues.

You can get a sunburn from artificial light, of course. Tanning beds are the obvious example, but there are other interesting ones. When you're a jeweler working in platinum, for instance, you need to wear UV protective gear (like glasses or even sunscreen). Platinum's melting point is so hot that it actually emits quite a lot of UV light and can give you a sunburn!

Other than these spectra, there is nothing different between light from an artificial source and light from the sun. Photons are photons.

Explanation:

PLEASS MARK ME AS BRAINLIEST

#STAY SAFE

4 0
3 years ago
If energy is shown on the product side of the equation, then the
ad-work [718]

Answer:

is exothermic

Explanation:

releases energy to the atmosphere

5 0
3 years ago
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