Can someone please help me

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.

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

Explanation:

script ok script ok ok ok

Answer:

Zn

Explanation:

H2SO4 + Zn → ZnSO4 + H2

Zn is the answer.

Answer:

H2SO4+Zn =ZnSO4 +H2

this is the answer

Answer:

So the asnwer is 66666666666666666666666666666666666666666666666666666666666666666666666666666666666668888844444444444444444443299997832........................................................4563ygfdjuzgu3456655555555555555555555553444446445444444555554

Explanation:

Answer:

nervous tissues

Explanation:

Nervous tissue is found in the brain, spinal cord, and nerves. It is responsible for coordinating and controlling many body activities. ... The cells in nervous tissue that generate and conduct impulses are called neurons or nerve cells. These cells have three principal parts: the dendrites, the cell body, and one axon

credits to the person who provided this info.

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.”

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

When one mole of Na3PO4.3H2O is heated extensively, three moles of water are released.

The water molecules in Na3PO4.3H2O are called molecules of water of crystallization. These molecules are not covalently bonded to the Na3PO4 molecule. They are only loosely attached to the substance.

Strong heating will drive away these molecules of water of crystallization to give three moles of water in the product.

Hence, when one mole of Na3PO4.3H2O is heated extensively, three moles of water are released.

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Answer:

i think it's higher for both u can try

Explanation:

Answer:

It's from the quation:

[tex] \boxed{ \mathsf{ \underline{2K} +\underline{2 H_2O} \rightarrow \:\underline{2}KOH + H_2 }}[/tex]

(How did I know?)

I learnt it while studying the elements of group 1.

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K, here, is Potassium. It's position in the periodic table is Group 1, Period 4.

Valance electrons of elements of this group contribute to the valency of the group's elements I.e.,

valency of Alkali metals is 1!

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What are hydroxides?

Hydroxides of an element comprises one atom each of oxygen and Hydrogen bonded together, acting as an anion, the hydorxide anion — OH-.

Example:

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In the question, The reactants are missing but the products are known, that are, Potassium Hydroxide and water.

Keeping the above mentioned property in mind, the reactants come clear as Potassium(K) and Cold water(H2O).

that makes the equation:

[tex] \mathsf{K + H_2O \rightarrow \: KOH + H_2 }[/tex]

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For an equation to be balanced, the number of atoms of each elements on both side of the equation must be equal.

Number of atoms of each element on the LHS:

(subscript in front of an atom represents its number of atoms in the compund)

Number of atoms of each element on the LHS:

The number of Hydrogen atoms on boths sides is NOT balanced!

Hit and trial method:

If we add a "2" in front of K, H2O and KOH

[tex] \mathsf{ \underline{2K} +\underline{2 H_2O} \rightarrow \:\underline{2}KOH + H_2 }[/tex]

Number of atoms on both the sides become equal.

(TIP: This comes thru practice:/. but main point is even out the oxygen and Hydrogen atoms first. like if it's 3 multiply it by 2 and you get an even number, I.e., 6)

Number of atoms of each element on the LHS:

Number of atoms of each element on the LHS:

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Hence, the balanced form of the equation is:

[tex] \boxed{ \mathsf{ \underline{2K} +\underline{2 H_2O} \rightarrow \:\underline{2}KOH + H_2 }}[/tex]

Taking into account the definition of density and Archimedes' principle, the beginner bowling ball will float on the water.

But first it is neccesary to know that density is a quantity referred to the amount of mass in a certain volume of a substance or a solid object.

In other words, the density is the relationship between the weight (mass) of a substance and the volume that the same substance occupies.

The expression for the calculation of density is the quotient between the mass of a body and the volume it occupies:

[tex]density=\frac{mass}{volume}[/tex]

In this case, a beginner's bowling ball has a mass of 4.9 kg and a volume of 5.4 liters. This is:

Replacing in the definition of density:

[tex]density=\frac{4900 g}{5400 mL}[/tex]

Solving:

density=0.907 [tex]\frac{g}{mL}[/tex]

On the other hand, Archimedes' principle says that an object immersed in a liquid experiences an upward vertical force equal to the weight of the volume of the dislodged liquid.

The sinking or floating of an object is determined by its density with respect to that of the liquid in which it is submerged.

Considering water as the liquid where the object is submerged in this case, an object with a higher density than water will sink. In contrast, an object with a lower density than water will float.

In this case, considering that water has a density of 1 [tex]\frac{g}{mL}[/tex], the bowling ball for beginners has a lower density. This indicates that, having a lower density than water, the object will float.

In summary, the beginner bowling ball will float on the water.

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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:2 hours

This range of temperatures is often called the "Danger Zone." Never leave food out of refrigeration over 2 hours. If the temperature is above 90 °F, food should not be left out more than 1 hour. Keep hot food hot—at or above 140 °F.

Explanation:

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.

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:

Answer:

2

Explanation:

10/5

Answer:

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

Answer:3

Explanation:

Answer:

8

Explanation:

Hope this helps you :)

Answer:

23: 6000560000000

24: 0.0015

25: 200

26: 0.0105

27: 600

28: 4023000

Explanation:

You have to move the decimal the same amount of times as the exponent says.

For example, like with the 6, you move it 2 decimals to the right (since it's positive), and the regular number would be 600.

Answer:

b

Explanation:

deposition is the differentiates weathering from erosion

Explanation:

See the table above. Periods at the side, metals at the top, non metals to the right, group to the right of that

Explanation:

When 6.38 moles of O2 and 9.15 moles of Al react, the ratio of aluminum to oxygen is 9.15/6.38 = 1.434. This shows that all of the oxygen is consumed before the aluminum and when the reaction ends the reactant aluminum is left. The number of moles of Al2O3 formed is approximately 4.25 moles.

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.