which element has chemical properties that are most similar to potassium?
a. calcium
b. cesium
c. nitrogen
d. sulfur

In an ecosystem, 20 percent of the protein consumed by humans around the world is fish.

An ecosystem is defined as a system which consists of all living organisms and the physical components with which the living beings interact. The abiotic and biotic components are linked to each other through nutrient cycles and flow of energy.

Energy enters the ecosystem through the process of photosynthesis .Animals play an important role in transfer of energy as they feed on each other.As a result of this transfer of matter and energy takes place through the ecosystem .Living organisms also influence the quantity of biomass which is present.By decomposition of dead plants and animals by microbes nutrients are released back in to the soil.

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Answer:

This is balanced

Explanation:

Both sides contain 2 Ag 2 NO3 1 Ba and 2 Cl.

Answer: Mendelevium

Explanation:

Answer: Molar mass is the amount grams that one mole weighs.

Explanation: You need to find the molar mass of NaCl which is the same as the amu on the periodic table in grams. So it is 22.99(Na) + 35.45(Cl) = 58.44

You also know that for every mole of NaCl you have 1 mole of Na because every molecule of NaCl has 1 atom of Na.

Finally, using the periodic table, again, you see that the molar mass of Na is 22.99.

Then using stoichiometry, you can find the grams of sodium.

100(g NaCl) * 1 mol (NaCl)/58.44 g (NaCl) * 1 mol (Na)/ 1 mol (NaCl) * 22.99 (g of Na)/ 1 mol (Na)

which equals 39.339435 g of Na.

If you need to maintain significant figures the answer will be 40.

Answer:

The produce large circular currents in all the ocean basins. Currents, The North Equatorial Current, the Gulf Stream, the North Atlantic Current, and the Canary Current.

Explanation:

Answer:

The Second Law

Explanation:

Answer: B. When two clear, colorless liquids are mixed together, a white solid forms.

D. A white piece of paper turns black and gives off a smell when burned.​

Explanation:

A. A white powder mixed with a clear, colorless liquid makes a solution that is also a clear, colorless liquid. B. When two clear, colorless liquids are mixed together, a white solid forms. O C. A shiny metal bar glows red and expands when heated. D. A white piece of paper turns black and gives off a smell when burned.​

When two clear, colorless liquids are mixed together, a white solid forms. A white piece of paper turns black and gives off a smell when burned.​ These two options are examples of chemical changes.

Chemical change, or, alternatively, chemical breakdown into two or more separate molecules, occurs when one material reacts with another to create a new substance. These processes are referred to as chemical reactions, and they are typically irreversible barring additional chemical reactions.

A chemical transformation is one in which one or more new compounds are created. Chemical reactions are another name for a chemical transformation. Examples include burning any stuff and iron rusting.

Chemical synthesis, or, alternatively, chemical breakdown into two or more separate molecules, occurs when one material reacts with another to create a new substance. These processes are referred to as chemical reactions, and they are typically irreversible barring additional chemical reactions.

Thus, option B and D are correct.

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Answer:

It kind of is logical so my answer is yes

Explanation:

Both (Photosynthesis and Cellular respiration)

Because

Therefore,

Both is correct✔

Answer:

A circut is comepleted

Explanation:

The bulb light when the needle touches a paper clip because the circuit is completed.

An electronic circuit comprises of individual electronic components like resistors, diodes,transistors , capacitors,etc. which are connected to each other by means of wires  through which electric current flows.It can also be referred to as an electronic circuit.

It usually comprises of at least one active component . The combination of wires and simple and complex components allows operations to be performed, amplification of signals, displacement of data and performing of computations.

There are  three types of circuits , an analog circuit ,a digital circuit and a mixed circuit which is combination of digital and analog circuits , even semiconductors are used in circuits.

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Answer:

its A reduces stress :)))

Explanation:

According to Le Chatelier’s principle, a system in chemical equilibrium responds to stress by shifting the equilibrium in a direction that reduces the stress.

Le Chatelier’s principle states that when a chemical equilibrium become imbalance by any change such as change in concentration, temperature, pressure etc. the system will reduces this stress by creating a new equilibrium  state.

By this principle, when temperature increases for an endothermic system, forward reaction will takes place more since the temperature is absorbed there.

Similarly, when the concentration of any reactant increases, the reaction will turn to that direction in  which that reactant is consumed more. If any loss the volume, then the equilibrium will shifts to that direction in which the that substance is produced.

Hence, the system will somehow manage the imbalance by reducing the stress occurred.

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Explanation:

Percentage yield = (278/365) * 100% = 76.16%.

Answer:

[tex]\boxed {\boxed {\sf 76.2 \% }}[/tex]

Explanation:

A percent yield helps measure how successful or precise a reaction was. It is ratio of measured yield to theoretical yield as a percent. The formula is:

[tex]percent \ yield=\frac{actual \ yield}{theoretical \ yield } *100[/tex]

For this reaction, the measured/actual yield was 278 grams, while the theoretical yield was 365 grams.

[tex]actual = 278 \ g \\\theoretical= 365 \ g[/tex]

Substitute the values into the formula.

[tex]percent \ yield =\frac{278 \ g}{365 \ g} *100[/tex]

Divide first. The grams (g) will cancel out.

[tex]percent \ yield =0.76164383561*100[/tex]

Multiply.

[tex]percent \ yield=76.1643835616[/tex]

The original measurements both had 3 significant figures, so we should round our percent yield to 3 sig figs. In this case, that is the tenths place.

The 6 in the tenth place tells us to round the 1 up to a 2.

[tex]percent \ yield \approx 76.2[/tex]

The percent yield is about 76.2 %

Answer: Convection

Explanation:

I hope this helps :D

Answer:

Radiation

Explanation:

It said that was the answer on the test.

A pan of water is sitting outside during a hot sunny day. The temperature of the water goes up. What type of heat transfer caused the temperature to go up?

conduction

induction

Incorrect: convection

Correct: radiation

Answer:

670.956

Explanation:

You can use this equation to solve for heat :

Q = m * c * ΔT

Q represents the heat

m represents the mass in kilograms

c is the specific heat. For aluminum, it's 897

ΔT is the change in temperature, so, 49 - 15 which is 34

Plug in the numbers and you get this :

Q = 0.022 * 897 * 34

Q = 670.956 Joules

Answer:

6u and 7u

Explanation:

no of neutrons in 1= 3

no of protons in 1=3

mass=3+3=6

same method applies to the 2nd one

There can be two, solid (Hail) and liquid (Water).

Answer:

liquid and solid

liquid- rain

solid- hail and snow

I don't know about gas; probably not.

Answer:

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

[tex]n = \frac{N}{L} \\[/tex]

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

[tex]n = \frac{5.66 \times {10}^{23} }{6.02 \times {10}^{23} } = \frac{5.66}{6.02} \\ = 0.940199...[/tex]

We have the final answer as

Hope this helps you

The sample here is a compound. The correct option is c.

A chemical compound is a substance made up of many identical molecules that contain atoms from more than one chemical element and are held together by chemical bonds.

A molecule made up of only one element's atoms is thus not a compound.

The anode undergoes oxidation, while the cathode undergoes reduction. The species being oxidized provides the electrons.

An electrode in an electrochemical cell is referred to as an anode or a cathode depending on the direction of electron flow.

The electrode reacts with the electrolyte at the anode, producing electrons.

These electrons build up at the anode. Meanwhile, another chemical reaction occurs at the cathode, allowing that electrode to accept electrons.

Thus, the correct option is c.

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Answer:

Independent Variable

Explanation:

1.Atomic Number (Z) = Mass Number (A) - Number of Neutrons

neutrons = mass number-atomic number

Atomic mass Cl-37= 17

Mass number Cl-37=37

Neutrons = 37-17=20

2. Mass atom X = mass isotope 1 . % + mass isotope 2.%...

[tex]\tt atomic~mass~X=0.0224\times 88+0.7832\times 90+0.1944\times 91=90.1[/tex]

3. The energy in one photon can be formulated as

[tex]\large{\boxed{\bold{E\:=\:h\:.\:f}}}[/tex]

f = c / λ, so :

[tex]\tt E\approx f\approx \dfrac{1}{\lambda}[/tex]

Energy is directly proportional to frequency and inversely proportional to the wavelength

So, as the frequency of photon increases, the energy of photon increases

4. Based on answer number 3 :

A. The wavelength becomes longer, and the energy decreases

Answer:

water

hehehehheehehhe

Answer:

B)They are both types of energy.

Explanation:

Answer:

they both travel easily through wood

Explanation:

i don't want your rbx i just wanna help you:)

Answer:

The answer to this question is A. Both arrive after P waves

Explanation:

Because since P waves always come first surface and S waves come after.

Answer:

There's no statement...

Answer:

a current flows through the loop of wire.

Explanation: my answers were worded diffrently

A loop of wire turns between two permanent magnets in a generator and the effect of this motion is conversion of Mechanical energy transforms into electrical energy.

Generator is a device which is used to convert mechanical energy to electrical energy.

In generator between the two poles of magnet a loop of wire rotate by the mechanical force which produces magnetic field which in turn convert into the electric field.

Hence, option (c) is correct.

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Explanation:

they have wave nature

its correct answer