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aleksandrvk [35]
2 years ago
8

20 points I will give you brainliest if you answer in 5 mins

Chemistry
1 answer:
snow_lady [41]2 years ago
4 0

Answer:Light bounces off of the mirror and then appears to come from behind the mirror.

Explanation:Plane mirrors form images that are virtual, upright and the same size and shape as the object it is reflecting.

When rays of light from the object hits a plane mirror they bounces off the mirror,that is they undergo reflection, and appear to originate from behind the mirror, resulting to the formation of a virtual image.

The image formed appears to be behind the plane in which the mirror lies. A virtual image is an image that is formed at a location from which the rays of light appear to come from. The image can not be formed on a screen..

You might be interested in
The table lists properties of a few known elements, but the states of matter and melting points are missing. Look up the element
kolbaska11 [484]

The properties of the given elements are as follows:

Potassium, K;

  • State of matter: Solid
  • Melting point: 63.5 °C
  • Conductivity: Good
  • Solubility (H2O): reacts rapidly with water

Iodine, I;

  • State of matter: solid
  • Melting point: 113.5 °C
  • Conductivity: very poor
  • Solubility (H2O): negligible

Gold, Au;

  • State of matter: solid
  • Melting point: 1064 °C
  • Conductivity: excellent
  • Solubility (H2O): none

Germanium, Ge;

  • State of matter: solid
  • Melting point: 938.2 °C
  • Conductivity: fair
  • Solubility (H2O): none

Barium, Ba;

  • State of matter: solid
  • Melting point: 727 °C
  • Conductivity: good
  • Solubility (H2O): reacts strongly

Argon, Ar;

  • State of matter: gas
  • Melting point: -189.4 °C
  • Conductivity: none
  • Solubility (H2O): negligible

Chlorine Cl;

  • State of matter: gas
  • Melting point: -101.5 °C
  • Conductivity: poor
  • Solubility (H2O): slight

Rubidium, Rb;

  • State of matter: solid
  • Melting point: 39.48 °C
  • Conductivity: good
  • Solubility (H2O): reacts violently

Silver, Ag;

  • State of matter: solid
  • Melting point: 961.8 °C
  • Conductivity: excellent
  • Solubility (H2O): none

Calcium, Ca;

  • State of matter: solid
  • Melting point: 842 °C
  • Conductivity: good
  • Solubility (H2O): reacts

Silicon, Si;

  • State of matter: solid
  • Melting point: 1,410 °C
  • Conductivity: intermediate
  • Solubility (H2O): none

Xenon, Xe;

  • State of matter: gas
  • Melting point: -111.8 °C
  • Conductivity: very poor
  • Solubility (H2O): none

<h3>What are elements?</h3>

Elements are pure substances which are composed of similar atoms.

Elements are defined as substances which cannot be split into simpler substances by an ordinary chemical process.

Elements have different physical and chemical properties and can be classified into:

  • metals
  • semi-metals
  • non-metals

In conclusion, the physical and chemical properties of the elements vary from metals to non-metals.

Learn more about elements at: brainly.com/question/6258301

#SPJ1

7 0
1 year ago
Any naturally occurring, inorganic, crystalline substance with a fairly definite chemical composition is called a
hram777 [196]
A Mineral is any occurring, inorganic, crystalline substance ( normally an element or a compound) that possesses a fairly definite chemical composition and a distinctive set of physical properties. They are formed naturally in the Earth, they are usually solid, inorganic, have a crystal structure, and form naturally by geological processes. 
3 0
3 years ago
Precipitation reactions always occur when two aqueous solutions are mixed (T/F)
Studentka2010 [4]

Answer: The given statement is false.

Explanation:

Precipitation reaction is defined as the chemical reaction in which two aqueous solution upon mixing together results in the formation of an insoluble solid.

For example, NaCl(aq) + AgNO_{3} \rightarrow NaNO_{3}(aq) + AgCl(s)

Here AgCl is present in solid state so, it is the precipitate.

But it is not necessarily true that two aqueous solutions will always result in the formation of a precipitate.

For example, NaCl(aq) + KNO_{3}(aq) \rightarrow KCl(aq) + NaNO_{3}(aq)

Hence, we can conclude that the statement precipitation reactions always occur when two aqueous solutions are mixed, is false.

7 0
3 years ago
When 1.95 g of co(no3)2 is dissolved in 0.350 l of 0.220 m koh, what are [ co2+], [ co(oh)42−], and [ oh−] if kf of co(oh)42− =
Airida [17]
Mass of Co(NO₃)₂ = 1.95 g
V KOH = 0.350 L
[KOH] = 0.220 M
Kf = 5.0 x 10⁹
molar mass of Co(NO₃)₂ = 182.943 g/mol
so [Co(NO₃)₂] = 1.95 / (0.350 * 182.943) = 0.03045 M
[Co²⁺] = 0.03045 M
[OH⁻] = 0.22 M
chemical reaction:
             Co²⁺(aq) + 4 OH⁻    ⇄      Co(OH)₄²⁻
I (M)      0.03045      0.22                   0
C (M)   - 0.03045   - 4 (0.03045)      0.03045
E (M)       - x         0.22 - 4(0.03045)   0.03045
                              = 0.0982
Kf  = [Co(OH)₄²⁻] / [Co⁺²][OH⁻]⁴
5.0 x 10⁹ = (0.03045) / x (0.0982)⁴
x = 6.5489 x 10⁻⁸
at equilibrium:
[Co²⁺] = 6.54 x 10⁻⁸
[OH⁻] = 0.0982 M
[Co(OH)₄²⁻] = 0.03045 M



4 0
3 years ago
1. Why is it necessary to equalize the pressure(i.e, have the water level the same in each tube) before taking a volume reading?
Anna11 [10]

Answer:

If you contact water with a gas at a certain temperature and (partial) pressure, the concentration of the gas in the water will reach an equilibrium ('saturation') according to Henry's law.

Explanation:

This means: if you increase the pressure (e.g. by keeping the vial closed), the CO2 concentration will increase. So it simply depends what concentration you need for your assay: 'CO2-saturated' water at low pressure or 'CO2-saturated' water at high pressure.

3 0
2 years ago
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