pls help. the picture is above. thanks!!

Answer:

The answer is 1.834 * 10

Explanation:

Explanation:

When a metal replaces another metal in solution, we say such a reaction has undergone a single displacement reaction.

In such a reaction, metal higher up in the activity series replaces another one due to their position.

To known the metal or metals that will replace the given copper, we need to reference the activity series of metals.

Every metal higher than copper in the series will displace copper from the solution.

So, there metals are: potassium, sodium, lithium, barium, strontium etc.

Answer:

2.8 X 10-5s in standard notation is 28-5s

Explanation:

Multiply 2.8 by 10

Answer:

what I can't understand what you're saying lol

Explanation:

be my friend lol

btw follow me on my another account (sarivigakarthi)...... plz

Answer:

12 moles

Explanation:

Answer:

Explanation:

4

Answer:

0.12 it is 32.1 *C

Explanation:

at the standard temp

The pressure of the gas at 21°C is 1 atm. Then the pressure at the standard temperature i.e., at 25°C or 298 K is 0.14 atm.

According Gay- Lussacs law, the pressure of the gas is directly proportional to the temperature of the gas at constant volume.

hence, P1/T1 = P2/T2.

given,

P1 = 0.12 atm

T1= 21 °C

T2 = 25°C

then,

P2 = P1 T2/T1

     = (0.12 atm ×21 °C)25 °C

     = 0.14 atm

The pressure will increase from 0.12 atm to 0.14 atm when the temperature reaches its standard point.

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ayo

you need to just

5.00 x 10^24 ÷ 6.022 x 10^23 = 8.3028894×10^46

^

this is the n number

so the anwer is you bottom feeders is (8.30 moles N)

Answer:

The orest one is possible D

Explanation:

Answer:

2578.608 centimeters in 28.2 yards.

Explanation:

There are 91.44 centimeters to a yard. Multiplying 91.44 by the number of yards, we get the number of centimeters per yards.

91.44(28.2) = 2578.608

Answer:

hruejhehee7 suhdbdudud d d

Explanation:

jejeij3j3n3jeij

I think it is true because level 4 has 4 sublevels which is s, p, d and f.

Answer:

The interaction between the tectonic and the hydrologic systems causes constant recycling of the materials of the Earth's crust. Rocks are heated, metamorphosed, melted, weathered, sediment is transported, deposited and lithified, then it may be metamorphosed again in yet another cycle.

Explanation:

Answer:

its called vapor. It can hold so much than colder eater based on the weather. For example if its cold it can heat up faster but if its hot it will maybe stay the same

Answer:

Option #2 (Green seeds)

Explanation:

Since both the plants are true-breeding, both plants only have the green allele. Therefore, their offspring must also only have the green allele and will therefore have green seeds.

Answer:

Explanation:

Cr₂O₃ ( chromium oxide )

Mass of Cr₂O₃⁻ = 2 x 52 + 3 x 16 = 104 + 48 = 152

152 gram chromium oxide contains 104 grams chromium

152 tonnes chromium oxide contains 104 tonnes chromium

5 tonnes chromium oxide contains 104 x 5 / 152 tonnes chromium

mass of chromium required =  104 x 5 / 152 tonnes

= 3.42 tonnes .

Answer:

The heat energy released from the reaction is approximately 51.4791 kJ

Explanation:

The given parameters are;

The heat of the reaction of 2Cl (g) → Cl₂ (g) = -243.4 J

The given mass of Cl being converted to chlorine gas, Cl₂ = 15.0 g

From the reaction for the heat of formation, we have;

2 moles of chlorine produces 1 mole of Cl₂ to release 243.4 kJ of energy per mole of Cl₂

The mass of 1 mole of Cl ≈ 35.453 g

Therefore, from number of moles, n = Mass/(Molar Mass), we have;

The number of moles of chlorine, in 15.0 g of chlorine = 15.0/35.453 ≈ 0.423 moles

Therefore, given that 2 moles of Cl produces 1 mole of Cl₂, we have;

0.423 moles of Cl will produce 0.423/2 ≈ 0.2115 moles of Cl₂

The heat energy released from the reaction is therefore, H ≈ 0.2115 × 243.4 kJ = 51.4791 kJ.

In the electromagnetic spectrum, the energy and frequency of radiation is given as, E=hυ where frequency is 0.603 ×10¹⁵ hertz.

The electromagnetic radiation consists of waves made up of electromagnetic field which are capable of propogating through space and carry the radiant electromagnetic energy.

The radiation are composed of electromagnetic waves which are synchronized oscillations of electric and magnetic fields . They are created due to change which is periodic in electric as well as magnetic fields.

In vacuum ,all the electromagnetic waves travel at the same speed that is with the speed of air.The position of an electromagnetic wave in an electromagnetic spectrum is characterized by it's frequency or wavelength.They are emitted by electrically charged particles which undergo acceleration and subsequently interact with other charged particles.The relation is given as,E=hυ  where on substitution υ =E/h=4×10[tex]^-19[/tex]/6.626×10[tex]^-34[/tex]=0.603×10¹⁵ hertz

Thus, frequency of radiation is 0.603 ×10¹⁵ hertz.

Learn more about electromagnetic spectrum,here:

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Hello KittyCat2004!

Reactants                            Products

Na = 2 atoms                       Na = 2 atoms

H = 4 atoms                          H = 4 atoms

O = 2 atoms                          O = 2 atoms

Because there are equal numbers of Na, H and O atoms on the reactant and product side, the chemical equation is balanced.

Answer:

it's easier to look it up

Explanation:

Answer:

H2SO4

Explanation:

Firstly,

2.056% hydrogen = 2.056g of H

32.69% Sulphur = 32.69g of S

65.26% oxygen = 65.26g of O

Next, we convert each mass into moles by dividing by their respective molar mass:

H = 1, S = 32, O = 16

H = 2.056/1 = 2.056mol

S = 32.69/32 = 1.021mol

O = 65.26/16 = 4.078mol

Next, we divide each mole value by the smallest mole value (1.021)

H = 2.056/1.021 = 2.01

S = 1.021/1.021 = 1

O = 4.078/1.021 = 3.99

Approximately the ratio of H to S to O is 2:1:4, hence, the empirical formula for H, S and O is H2SO4.

The empirical formula of a chemical compound is the simplest whole-number ratio of atoms present in a compound

The correct answer of the following is [tex]H_2SO_4[/tex]

The data is given as follows:-

We have to find the moles in the reaction.

The mas of the element is as follows:-

After solving the equation we get

[tex]H = \frac{2.056}{1} = 2.056mol\\\\S = \frac{32.69}{32} = 1.021mol\\\\O = \frac{65.26}{16} = 4.078mol[/tex]

Next, we divide each mole value by the smallest mole value (1.021)

[tex]H = \frac{2.056}{1.021} = 2.01\\\\S = \frac{1.021}{1.021} = 1\\\\O = \frac{4.078}{1.021} = 3.99[/tex]

The ratio of H to S to O is 2:1:4,

Hence, the empirical formula for H, S, and O is [tex]H_2SO_4.[/tex]

For more information, refer to the link:-

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Answer:

Scientific Notation: 3.45 x 10^5

E Notation: 3.45e5

Explanation:

Answer: True

Explanation: Hopes this helps- Lily ^_^

Answer:

Protons

Explanation:

Typically protons cannot be removed from the atom. Removing protons from an atom will completely change the atom as it will become another element entirely.

In an atom, protons are held by strong nuclear forces.

Answer:

protons

Explanation:

Answer:

The positive and negative electrons attract leaving a shock and heat travels faster through metal than any other material such as plastic, wood, etc.

Explanation:

Answer:

The electrons in a piece of metal can leave their atoms and move about in the metal as free electrons. ... The hotter the metal, the more kinetic energy these vibrations have. This kinetic energy is transferred from hot parts of the metal to cooler parts by the free electrons.

Explanation:

Answer:

A, D

Explanation:

Water evaporates into gas which requires an increased amount of energy.

Not B because: Dry ice and ice undergo sublimation, which is different from evaporation.

Not C because: As a result of the water boiling, the energy in the environment sees an *increase*, rather than a decrease.

Answer:

Their average kinetic energy increases

Explanation:

The average kinetic energy of the rice molecules increases as the pot is left on the cooking stove.

Heat is transferred to the pot by conduction from the heat source. The heat is then transferred to the rice in the cooking pot by convection.

Answer:

The energy of the molecules in the rice increases.

Explanation:

That would be the skeletal system, hope this helps ^^

Answer:

1)They have different densities.

2) The molecules are packed differently

Explanation:

Oil and Water have different densities The first reason that water and oil don’t mix is because their molecules are packed differently. The molecules of water are packed very densely. (Would be good to show water molecules packed densely) In one glass of water, there are more molecules than the number of known stars in the universe!

Answer:

diff densities

Explanation: