The circuit below is powered by a 20-volt battery. What current is flowing through the on/off switch (when it is on, as shown)?

Answer:

C solution

Explanation:

i hope that i got it right im not very good with questions

Answer:

6,8 g

Explanation:

c = 4.18 J/(g * °C) = 4180 J / (kg * °C)

[tex]t_{1}[/tex] = 25 °C

[tex]t_{2}[/tex] = 36,4 °C

Q = 325 J

The formula is: Q = c * m * ([tex]t_{2} - t_{1}[/tex])

m = [tex]\frac{Q}{c * (t_{2} - t_{1} )}[/tex]

Calculating:

m = 325 / 4180 * (36,4 - 25) ≈ 0,0068 kg = 6,8 g

The mass of the quantity of water heated from 25.0°C to 36.4°C by absorbing 325 J of heat energy is 6.8grams.

HOW TO CALCULATE MASS:

The mass of a substance can be calculated by using the following formula:

Q = m × c × ∆T

Where;

According to this question;

m = ?

∆T = 36.4°C - 25°C = 11.4°C

Q = 325J

325 = m × 4.18 × 11.4

325 = 47.65m

m = 325 ÷ 47.65

m = 6.8g

Therefore, the mass of the quantity of water heated from 25.0°C to 36.4°C by absorbing 325 J of heat energy is 6.8grams.

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Answer:

electroplating is host to several defects due to the complexity of the process. Common electroplating defects often include issues that are present before plating, such as cold shuts, pitting, sharp edges, cleavage points and unclean manufacturing. During plating, flaking or a loss of adhesion can occur.

Explanation:

Answer:

O The clothing company conducted a scientific  investigation to communicate results to researchers,  who then used the knowledge in a technological

design.

Explanation:

The products of scientific investigation are converted into technology for use engineers.

Engineering is the application of science to solve life problems. Science in itself is an inquiry into nature.

Answer:

false

Explanation:

chemical changes turn into new substances

Answer: B. triH sol Mgl2= -triHlat+ triHhydr Mg^2+ 2triHhydr^l-

Explanation:

Just did it and it was right

Answer:

A)

Cl + O3 --> ClO + O2

2ClO --> ClOOCl

ClOOCl --> 2 Cl + O2

B)

Cl2 + 4O3 -> 2 ClO + 5O2

Explanation:

Step 1: Chlorine atoms react with ozone (O3) to form chlorine monoxide and molecular oxygen

Cl + O3 --> ClO + O2

Step 2: Chlorine monoxide molecules combine to form ClOOCl gas

2ClO --> ClOOCl

Step 3: ClOOCl absorbs sunlight and breaks into chlorine atoms and molecular oxygen

ClOOCl --> 2 Cl + O2

B) Overall Balanced equation

Cl2 + 4O3 -> 2 ClO + 5O2

Answer:

there are 7 total oxygen (O) atoms are present in in the reactants side of the equation

Answer:

Explanation:

Normal boiling point = 141.7°C

Elevated boiling point = 142.5°C

Elevation of boiling point Δt = 0.8°C

Formula for elevation of boiling point is as follows .

Δt = 1000 x Kb x w / (MW )

where w is weight of solute , M is molecular weight of solute , W is weight of solvent in grams,  Kb is molal boiling point elevation constant .

Mol weight of barium hydroxide = 171 .

.8 = 1000 x Kb x 68.1 / (171 x 750 )

Kb = 1.5°C / m

Answer:

H-H equation is written as follows:

pH=pK + log

{HCO3-}(base)

{H2CO3}(acid)

Answer:

follow the picture,,, it includes the normal elements too

The reason why I organized these specific elements from the list of elements that you provided me is because they have to do with color. I believe organizing by color would be much easier for me to understand. There is also a somewhat equal amount  for each color. For example I used the colors: orange, green and red In my chart because there are four of each color in the list you provided me.

Answer:

software is a collection of codes installed onto your computer hard drive and hardware is any physical device that we used in or with your machine.

hope it helps.

Answer: soft water is water with a low concentration of ions and hard water is one with a high concentration of water e.g rainwater

Explanation:

Answer:

Cr2O3 and 3C are the reactants

2Cr and 3CO are the products

Explanation:

Cr2O3is reacting with 3C to form 2Cr + 3CO

Answer:

Increased heat makes all the molecules in the tea/water mix vibrate and move around a great deal more, thus increasing the rate of diffusion, and therefore increasing the rate of brewing.

Explanation:

hope i help lol :)

Answer:

hello your question is incomplete attached below is the complete question

answer :

we use Isomerization because conjugated allylic carbocation  is more stable when compared to a Non-conjugated Allylic carbocation

Explanation:

Reason for the mechanism

we use Isomerization because conjugated allylic carbocation  is more stable when compared to a Non-conjugated Allylic carbocation

attached below is the detailed mechanism

Answer:

yep C is correct!!

Explanation:

Answer:

C₆H₆

Explanation:

Molar mass of the compound is 78g/mol

Unknown:

Molecular formula of the compound  = ?

Solution:

The empirical formula of the compound is CH.

Empirical formula is the simplest formula of a compound.

To solve this problem:

 Find the molar mass of CH;

       Molar mass = 12 + 1  = 13g/mol

Multiplication index  = [tex]\frac{78}{13}[/tex]    = 6

So;

              (CH)₆  ;

 Therefore:

               C₆H₆

Answer:

Although he was unaware ofit, Mendeleev had actually placed the elements inorder of increasing “atomic number,” a numberrepresenting the amount of positively charged protons in the atom (also thenumber of negatively charged electronsthat orbit the atom). Mendeleev went even further.

Answer:

I think it's B- it is transparent

Answer:A

Explanation:Glass can not be classified as a crystal when it is in its amorphous phase.

Answer:

Because each element has an exactly defined line emission spectrum, scientists are able to identify them by the color of flame they produce. For example, copper produces a blue flame, lithium, and strontium a red flame, calcium an orange flame, sodium a yellow flame, and barium a green flame. When you heat an atom, some of its electrons are "excited* to higher energy levels. When an electron drops from one level to a lower energy level, it emits a quantum of energy. ... The different mix of energy differences for each atom produces different colors. Each metal gives a characteristic flame emission spectrum

Answer:

9.64 x 10^22

Explanation:

To go from moles to molecules, you multiply by Avogadro's number, 6.022 x 10^23, so you get 9.64 x 10^22.

Answer: B. They reproduce slower than unicellular organisms

Explanation:

In unicellular organisms there is a single cell which performs all the functions like digestion, respiration, and reproduction. The cell reproduce by cell division. The single parent cell divides into two identical daughter cells. But multicellular organisms exhibit multiple cells and their reproduction is complex. They reproduce by sexual mode of reproduction in which separate sex cells are produced when they fuse form zygote which is the precursor of new organism. This process is slower than that of the cell division and production of progeny by the unicellular organisms. Thus reproduction is slower in multicellular organism this is the disadvantage in multicellular organisms.

Answer:

B. they reproduce slower than unicellular organisms

Explanation:

Answer:

Ar

Explanation:

1s2|2s2 2p6|3s2 3p6 means 2+2+6+2+6=18 electrones. Also it means the number in the table.

According to the №18 the requested element is Argon.

The element argon with atomic number 18 is found to has the electronic configuration 1s² 2s² 2p⁶ 3s² 3p⁶. Here the element 'Ar' belongs to the 18th group of the periodic table.

The electronic configuration is defined as a method which represents the arrangement of electrons in the atomic orbitals. Each of the elements have a unique electronic configuration.

The physical, chemical and magnetic properties of the elements can be predicted by knowing their electronic configuration. Sometimes the term electron structure can also be used instead of electronic configuration.

The species K⁺ ion has the same electronic configuration of 'Ar'. The atomic number of 'K' is 19 and  K⁺ is formed by the lose of one electron from 'K'. Here  K⁺ has 18 electrons and its electronic configuration is:

1s² 2s² 2p⁶ 3s² 3p⁶.

Thus the element argon has the electronic configuration 1s² 2s² 2p⁶ 3s² 3p⁶.

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Answer:

700g

Explanation:

Given parameters:

Density of gasoline  = 0.7g/cm³

Volume of gasoline  = 1L  = 1000cm³  

Unknown:

Mass of the gasoline  = ?

Solution:

Density is the mass per unit volume of a substance. It can be expressed as;

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

 So;

      Mass  = density x volume

    Mass  = 0.7 x 1000  = 700g

Answer:

heat can move from any source but if we are being legitimate it moves from convection

Explanation:

Answer:

Their must be a picture with this question so we can answer it

Explanation:

According to octet rule  the bonded valence shells are completely filled. All the compounds except the first one, CH₃CH₃O is invalid since H does not obey the rule and invalid.

Octet rule says that an atoms become stable when it completes its valence shell to 8 electrons or 2 electrons for K-shell. Thus bonded shells have to completely filled to be stable.

Each atom shares its electrons based on its valency. For example carbon have a valency of 4 and it forms for bonds and oxygen and sulfur have two and hydrogen forms only one bonds.

In the first compounds CH₃CH₃O, where one H forms two bonds which is not possible and invalid.

In the second compound CONH, all the atoms satisfies its valency including nitrogen having a valency of three forms  three bonds. Similarly in CH₂F₂, one fluorine forms one bond and the structure is valid.

In the case of Br₂ , each bromine shares one electron with the other and complete their octet to eight electrons. In NH₃, SCO and COCl₂ all the atoms satisfies their valency and the structures are valid.

Therefore the only invalid structure is first compound, remaining all are valid.

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Your question is incomplete. But most probably your complete question was as in the uploaded image.