which of the following is a scientific law?

Answer:

The density of mercury is 13.6 g/mL, which is equal to 1360 kg/m3.

Answer:

protons and electrons

Explanation:

protons give off a positive charge and electrons give off a negative charge

Answer:

When plants lose more water than they can take up from the soil, they become water stressed. ... Such drought conditions certainly inhibit the growth of plants. If it goes long enough without water it will die because the plant uses water for a lot of different jobs needed to keep the plant alive, so the long-term effect is that the plant will die if the drought continues.

Explanation:

The Arizona poppy is the summer herb of deserts of southwestern US and has pinnately compound leaves and large snowy flowers. This poppy appears in rainy seasons.  

Learn more about the  Arizona poppy that has adapted to living in areas that receive less rain.

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Answer:

A candy bar

A stretched rubber band

A roller coaster at the top of a hill

Explanation:

Potential energy is the energy present as a result of the position of an object. This energy depicts zero motion or movement unlike kinetic energy.

A candy bar, stretched rubber band and roller coaster at the top of a hill all indicate positions without any said explanation of movement.

The other option choices depicts a type of movement .This is why the three option choices are correct in this scenario.

The examples that represent potential energy are:

A. A candy bar

B. A stretched rubber band

D. A roller coaster at the top of a hill

It is the stored energy in any object or system by virtue of its position or arrangement of parts. This energy depicts zero motion or movement unlike kinetic energy. For example : A candy bar, stretched rubber band and roller coaster at the top of a hill all indicate positions without any said explanation of movement.

Thus, correct options are A, B and D.

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Answer:

An electrolytic cell uses electrical energy to drive a non-spontaneous redox reaction. An electrolytic cell is a kind of electrochemical cell. ... The electrolyte is usually a solution of water or other solvents in which ions are dissolved. Molten salts such as sodium chloride are also electrolytes.

Explanation:

Explanation:

An electrolytic cell has three component parts: an electrolyte and two electrodes (a cathode and an anode). The electrolyte is usually a solution of water or other solvents in which ions are dissolved. Molten salts such as sodium chloride are also electrolytes.

Answer:

9.67 g

Explanation:

176 cm³ / 18.2 g/cm³ = 9.6703296703...

I rounded to the nearest hundredth

To solve this we must be knowing each and every concept related to  tectonic plates. Therefore, the correct option is option A among all the given options.

The lithosphere, which includes the crust and topmost mantle, is divided into portions by tectonic plates. Numerous dangers, including volcanic eruptions, earthquakes, and tsunamis, are caused by the relative movement of tectonic plates.

Because of the makeup of the rocks inside the plates, tectonic plates can float on the mantle. This reduces their density relative to the mantle. Granite rock, which contains quartz, feldspar, as well as other relatively light materials mostly comprised of silicon and aluminum, makes up the continental crust. Mid-ocean ridges, earth's crust are caused by the shifting of tectonic plates.

Therefore, the correct option is option A.

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Answer:

7.21 x 103 kg/m3

Explanation:

Dimensional analysis has been the process to establish and convert the various units in the measurement. The density of manganese in kg/m3 is 7.21 × 10³ kg/m³.

Dimensional analysis has been the method that is also referred to as the unit factor or factor label method. It solves the mathematical expressions by multiplying the given value with another without changing its quantity and amount. It is used to change the units of the value.

Given,

Density of manganese = 7.21 g/cm³

The dimensional analysis method is used to convert grams per cubic centimeter into kilograms per cubic meter as:

1 gram / cubic centimeter = 1000 kilogram / cubic meter

So, 7.21 g/cm³ = X kilogram / cubic centimeter

Solving for X as:

X = 7.21 g/cm³ × 1000 kilogram / cubic centimeter

X = 7.21 × 10³ kg/m³

Therefore, 7.21 × 10³ kg/m³ is the density.

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Answer:

(a) 20,000 seconds

(b) 333.33 repeating minutes

(c) 0.0006341958 years

Answer:

16 km per hour

Explanation:

I hope this helped.

Answer:

Yes

Explanation:Like wax crayons but they can dissolve in water.

Answer:

ye bit

Explanation:

Answer:

A) The temperature at which the particles of matter are at their lowest energy points.

Explanation:

Absolute temperature refers to the lowest  possible temperature. At this state,  no heat energy remains in the substance; the energy of the particles are at their lowest energy points.

Answer:

Healthy kidneys clean your blood and remove extra fluid in the form of urine. They also make substances that keep your body healthy. Dialysis replaces some of these functions when your kidneys no longer work. There are two different types of dialysis - hemodialysis and peritoneal dialysis. The following is about hemodialysis.

Answer:

A

Explanation:

Argon atom is a noble gas. In argon atom, there are 18 particles inside the nucleus and 18 particles outside the nucleus. Thus, the correct option is A.

Argon is a non-metal element. It belongs to the group 18 (VIIIa) of the modern periodic table of chemical elements. This group is also called the noble gases group of the periodic table.

The argon atom is a noble gas which is made up of 18 protons and 18 electrons which are present inside the nucleus and outside the nucleus of the atom, respectively. The atom contains eight electrons in its outermost shell. Argon is a colorless and an odorless gas under the normal conditions. When argon is activated by the treatment of a high-voltage electric field, it emits a violet-colored light.

Therefore, the correct option is A.

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Answer:

Xe

Explanation:

if ur talking about what it is for xenon

Answer:

The answer is c

Explanation:

Answer:

C

Explanation:

Answer: 6

Explanation:

Because it's 6 after the decimal

Given :

A balanced chemical equation :

[tex]Zn +Cl_2->ZnCl_2[/tex]

To Find :

How many grams of zinc are needed to produce 12 grams of zinc chloride.

Solution :

Moles of [tex]ZnCl_2[/tex] ,

[tex]n=\dfrac{Given \ wt}{Molecular\ Mass}\\\\n =\dfrac{12}{136.30}\ mol\\\\n=0.088\ mol[/tex]

Now, by balanced chemical equation we can say that 1 mol of Zn produce

1 mol of [tex]ZnCl_2[/tex] .

So, 0.088 mol of Zn is required to produced 0.088 mol of [tex]ZnCl_2[/tex] .

[tex]Mass \ required = molecular \ mass \times moles\\\\m = 65.38 \times 0.088\\\\m=5.8 \ gm[/tex]

Therefore, 5.8 grams of zinc is required.

Hence, this is the required solution.

Answer:

I believe you are correct

thats because All of the 2nd choices seem to be larger

Answer:

Pure Silicon in Electronics

Silicon material is commonly used as a semiconductor in electronics: devices such as transistors, printed circuit boards, and integrated circuits make use of silicon's highly conductive properties to maximize their performance.

Explanation:

Answer:

C

Explanation:

im not that sure if its correct

Answer:

Explanation:

1. It is five valence electrons.

2. It is four valence electrons.

3. It is six valence electrons.

4. It is two valence electrons.

I do hope I helped you! :)

Answer:

1. c

2. b

3. a

4.d

Explanation:

Answer:

2000 km/sec

1km=1000m

2000×1000

2000,000 m/sec

Answer:

1. B   2. B   3. C   4. A     5. A

Explanation:

1 Which atom contains exactly 16 neutrons?

Neutrons = Mass Number - Proton

A -33;

Neutrons = 33 - 16 = 17

B P-31

Neutrons = 31 - 15 = 16 Correct option

C O-16

Neutrons = 16 - 8  = 8

D Cl – 35

Neutrons = 35 - 17 = 18

2. In a mass spectrometer, the heaviest particles are least deflected and that with the least mass are deflected the most. The correct option is B.

3. 1 mol of C = 12 grams;

3 mol = x

x = 3 * 12 = 36 grams Correct option is C

4. 1 mol = 27g of Al;

x mol = 65g

x = 65 / 27 = 2.4 moles. Correct option is A.

5. There are 6.022 x 10^23 atoms in 23 grams of sodium;

x atoms in 4.5g

x = 6.022 x 10^23 * 4.5 / 23 = 1.2 x 10^23 atoms Correct option is option A.

The number of significant figures in 4000 is 1