Please tel me the answer I will mark you brainliest

Answer:

The usage of gold is generally avoided in semiconductor technology, since it acts as a deep-level trap and recombination center, i.e. charge carriers of opposite sign do recombine at Au defects in Si and get lost to the current.

Answer:

Photosynthesis process

Explanation:

Photosynthesis removes carbon dioxide naturally — and trees are especially good at storing carbon removed from the atmosphere by photosynthesis.

Answer:

Atoms of non metals

Explanation:

Hope it helps!

Answer: Hydrogen-H

Explanation: Hydrogen is a gas, the most abundant element in the universe and the simplest of them all

Answer:

There are significant environmental impacts associated with coal mining and use. It could require the removal of massive amounts of top soil, leading to erosion, loss of habitat and pollution. Coal mining causes acid mine drainage, which causes heavy metals to dissolve and seep into ground and surface water.

Explanation:

Explanation:

cooling

communication

heating

motion

Answer:

I believe it's all of the above

Explanation:

Because heating and cooling can be done by an AC unit, which takes electricity. Communication also takes electricity, along with lighting (especially if we're talking light fixtures to light up homes). Not to mention motion, such as cars and other transportation uses, believe it or not, electricity.

Hope this helped, also please tell me if I'm wrong.

Answer:

Zn

Explanation:

H2SO4 + Zn → ZnSO4 + H2

Zn is the answer.

Answer:

H2SO4+Zn =ZnSO4 +H2

this is the answer

Answer:

2

Explanation:

10/5

Answer:   1.15 × 10⁷ Hz

Explanation:

Frequency = Speed of Light ÷ Wavelength  

                   = (2.99 × 10⁸ m/s) ÷ (2.6 × 10 m)    

                   = 1.15 × 10⁷ Hz

The frequency of a wave of wavelength 2600 cm is 1.15 × 10⁷ Hz

Notes:

Hz ≡ /s

1 m = 100 cm

The frequency of a 2,600 cm wave is 1.15 × 10⁷ s⁻¹

From the question,

We are to determine the frequency of a wave with wavelength 2600 cm.

Using the formula

[tex]c = \nu \lambda[/tex]

Where c is the speed of light (c = 3.0 × 10⁸ m/s)

[tex]\nu[/tex] is the frequency

[tex]\lambda[/tex] is the wavelength

Then, we can write that

[tex]\nu = \frac{c}{\lambda}[/tex]

From the question

λ = 2600 cm = 26 m

Putting the parameters into the formula, we get

[tex]\nu = \frac{3.0 \times 10^{8} }{26}[/tex]

[tex]\nu = 0.11538 \times 10^{8}[/tex]

[tex]\nu \approx 1.15 \times 10^{7} \ s^{-1}[/tex]

Hence, the frequency of a 2,600 cm wave is 1.15 × 10⁷ s⁻¹

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Answer:

a) 2.7 g cm³

b) 10.2 g

Explanation:

a) Density = Mass/Volume

= 21.6/8.00

= 2.7 g cm³

b) Mass = Volume × Density

= 2.55 × 4.0

= 10.2 g

Knowing an object's position requires the (D) reference point

Reference point is the starting point use to locate another place or object. an object's position depends on reference point.

Position describes the distance and direction from reference point for an object. position of an object's is the location to the reference point.

Displacement is the difference between the initial position and the final position.

Speed is defined as the distance an object travels per unit time.

Time is defined as the duration  of an object travels to cover a distance.

so according to all , reference point is needed to determine the position of an object's.

Thus, Knowing an object's position requires the (D) reference point

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Answer:

When excited electrons fall back to the ground state, they release energy in the form of photons of light. These photons of light create the colors observed in a line-emission spectrum.

Explanation:

We can check if the equation is balanced by comparing the number of atoms of each element on the reactant and product sides. The reaction is only balanced if the number of atoms of each element is equal.

       S  +  3O₂ → SO₃

    Reactant       Product

S        1                    1

O       6                   3

The balanced equation would be  2 S + 3O₂ → 2SO₃

                                                          Reactant       Product

                                                     S         2                   2

                                                     O        6                    6

Answer:

i think it's higher for both u can try

Explanation:

particles, high, low, oxygen, waste, carbondioxide, fast.

Elements of the periodic table are arranged in order of increasing atomic number. The periodic law states “When elements are arranged in order of increasing atomic number, there is a periodic repetition of their chemical and physical properties.”

Answer:

110.91982

The element is probably Barium

The atomic number of an atom is equal to the number of protons it has. In this case, the ion has 56 protons. Therefore, the atomic number of the ion is 56.

The atomic number or nuclear charge number (symbol Z) of a chemical element is the charge number of an atomic nucleus. For ordinary nuclei composed of protons and neutrons, this is equal to the proton number (np) or the number of protons found in the nucleus of every atom of that element. The atomic number can be used to uniquely identify ordinary chemical elements. In an ordinary uncharged atom, the atomic number is also equal to the number of electrons.

For an ordinary atom which contains protons, neutrons and electrons, the sum of the atomic number Z and the neutron number N gives the atom's atomic mass number A. As there are 56 protons thus the atomic number of the ion is 56.

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Answer:

A)

Explanation:

Answer:3

Explanation:

Answer:

B) protons and neutrons are shared by two atoms so as to satisfy the requirements of both atoms

Explanation:

script ok script ok ok ok

Answer:

Balance The Chemical Equation Cac2 H2o Ca Oh 2 C2h2 Balance the chemical equation CaC 2 + H 2 O → Ca (OH) 2 + C 2 H 2 Calcium carbide react with water to produce calcium hydroxide and acetylene.

Explanation:

CaC2 + H2O > Ca(OH)2 + CH4

Ca + 2 H2O → Ca(OH)2 + H2 - Balanced equation

A balanced chemical equation occurs when the number of the atoms involved in the reactants side is equal to the number of atoms in the products side. In this chemical reaction, nitrogen (N2) reacts with hydrogen (H) to produce ammonia (NH3). The reactants are nitrogen and hydrogen, and the product is ammonia

Balanced chemical equation - A chemical equation in which the number of each type of atom is equal on the two sides of the equation. Subscripts - Part of the chemical formulas of the reactants and products that indicate the number of atoms of the preceding element.

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Answer:

8

Explanation:

Hope this helps you :)

Answer:

Democritus was the first person to hypothesize the existence of atoms (the idea that you can't keep dividing matter forever). Scientists did eventually prove the existence of atoms. however, they aren't completley how he imagined them.