2 NaOH (s) + CO2(g) → Na2CO3 (s) + H20 (I) How many grams of water can be produced with 1.85 moles of NaOH​

28. unbalanced because in reactant side the Aluminium is 1 and oxygen is 2 but in the product side the Aluminium is 2 and oxygen is 3 it is not equal so it is unbalanced equation

29. unbalanced because the oxygen atom are not equal in the reactant and the product side

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Answer: d. Glaciers moving revealing bare rock underneath

Explanation:

Primary succession is what happens when living things colonise an area that was previously uncolonized because it had been destroyed or hadn't been created yet.

When glaciers move on from areas and expose the bare rock underneath, these areas are new and so primary succession will take place as living things begin to colonize this new area.

Answer:

Something or someone you can see invisibility is the opposite of something you cannot see or some thing you cannot see

Explanation:

Answer:

How fast the magnet in the generator is moving through the coiled wire

Explanation:

Another name for an electric generator is the electric motor. It is a device that is used to convert mechanical energy into electrical energy.

It comprises of a rectangular coil of insulated wire called armature which rotates about a fixed axis. Powerful magnets provides the required  magnetic field. A commutator made of split ring copper and two carbon brushes are attached to it.

The voltage produced by the electric motor depends on;

i) The strength of the magnetic field.

ii) The number of turns of the coil

iii) The current across the armature

Answer:

a. ½O2

b. O2

c. 3O2

d. 6O2

Explanation:

Hello!

In this case, since balancing chemical reactions can be attained by adding coefficients prior to each species in the chemical equation, we infer that the following representations are correct because they have a coefficient and the molecule O2 as diatomic oxygen:

a. ½O2

b. O2

c. 3O2

d. 6O2

It means that e. and f. are wrong because even when they have the coefficient, the molecule O2 is not properly written.

Best regards!

The correct representations of O2 and its coefficient are: ½O2, O2, 3O2, 6O2.

Oxygen molecule O2 exists as a diatomic molecule that comprises two atoms chemically bonded together.

When oxygen undergoes a chemical reaction with other compounds, the diatomicity of oxygen O2 is still usually maintained.

The coefficient of oxygen O2 varies depending on the reaction in which oxygen undergoes such as:

An oxygen molecule does not exist as 3O and 5O3 represent a reaction of ozone.

Therefore, we can conclude that the correct representations of O2 and its coefficient are: ½O2, O2, 3O2, 6O2.

Learn more about balancing chemical reactions here:

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Answer:

why

Explanation:

B is the answer to the question

Answer:

70 moles is an Alluminium

Answer:

B. One or more phase change occur

C. the final state of substance is liquid

D. the sample initially gas

Explanation:

The pressure p = 1.00 atm

The temperature t = 149.2K

The temperature > 119.8K

119.8K being the normal boiling point.

This shows that the krypton is a gas

After it has cooled the pressure = 1.00 atm

The temperature T dropped to 107.8K

T < 115.9K

The melting point has been put as 115.9K

This is a liquid. The final state of the substance is a liquid. Since the temperature is less than the melting point and the pressure is 1.00 atm

Answer:

8.50095 x 10^5

Explanation:The purpose of scientific notation is for scientists to write very large, or very small, numbers with ease.

Calculating scientific notation for a positive integer is simple, as it always follows this notation:

a x 10b

Follow the steps below to see how 850,095 is written in scientific notation.

Step 1

To find a, take the number and move a decimal place to the right one position.

Original Number: 850,095

New Number: 8.50095

Step 2

Now, to find b, count how many places to the right of the decimal.

New Number: 8 . 5 0 0 9 5

Decimal Count:   1 2 3 4 5

There are 5 places to the right of the decimal place.

Step 3

Building upon what we know above, we can now reconstruct the number into scientific notation.

Remember, the notation is: a x 10b

a = 8.50095

b = 5

Now the whole thing:

8.50095 x 105

Step 4

Check your work:

105 = 100,000 x 8.50095 = 850,095

Answer:

dating and correlating the strata in which it is found

Explanation:

Answer:

The correct answer is A:The age of an unfamiliar layer of rock

Explanation:

I promise that I got it correct on A P E X <3

Answer:

c thats just what i do

Explanation:

the answer is true the first one

Answer:

122.7 mL

Explanation:

Step 1: Given data

Step 2: Calculate the volume of the piece of iron

Density is equal to the mass of the piece divided by its volume.

ρ = m/V

V = m/ρ

V = 178.5 g/(7.87 g/mL) = 22.7 mL

Step 3: Calculate the volume of the mixture

The volume of the mixture is equal to the sum of the volume of water and the iron piece.

100.0 mL + 22.7 mL = 122.7 mL

Answer: C. A part of the sample was spilled from the beaker before it was weighed.

Explanation:

Density is defined as the mass contained per unit volume.

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

Density is directly related to mass and inversely related to volume. Thus if density is measured to be higher than it should be , it could be due to more mass or less volume.

Thus errors could be a part of the sample was spilled from the beaker before it was weighed.

The correct option is C. A part of the sample was spilled from the beaker before it was weighed.

The following information should be considered:

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Answer:

V₂ = 119.59 cm³

Explanation:

Given data:

Initial volume = 150 cm³

Initial temperature = 72°C

Final volume = ?

Final temperature = 2°C

Solution:

Initial temperature = 72°C (72 +273.15 K = 345.15 K)

Final temperature = 2°C (2 + 273.15 k = 275.15 K)

Solution:

According to the Charles Law.

V₁/T₁ = V₂/T₂

V₁ = Initial volume

T₁ = Initial temperature

V₂ = Final volume  

T₂ = Final temperature

Now we will put the values in formula.

V₁/T₁ = V₂/T₂

V₂ = V₁T₂/T₁  

V₂ = 150 cm³ × 275.15 K /345.15 K

V₂ = 41272.5 cm³.K / 298 K

V₂ = 119.59 cm³

Answer:

CsNO₃

Explanation:

The reactants are:

         Cesium chloride  = CsCl

          Silver nitrate  = AgNO₃

Products:

           Silver chloride  = AgCl

The other product:

 Now;

        CsCl  +    AgNO₃  →  AgCl  + ?

The other product is CsNO₃

So;

      CsCl  +    AgNO₃  →  AgCl  +    CsNO₃

H2O as an oxidant only

Given

Reaction

2 Na + 2 H2O → 2 NaOH + H2

Required

The function of water in the equation

Solution

Water : oxidizing agent

Na : reducing agent

Na⁰ → Na⁺ (oxidation)

H⁺- → H⁰ (reduction)

Acids and bases according to Bronsted-Lowry

Acid = donor (donor) proton (H⁺ ion)

Base = proton (receiver) acceptor (H⁺ ion)

If water is acting as an acid it should only give 1 H +, so that becomes:

H₂O (l) ⇔ OH⁻ (aq) not H₂

Answer:

One way is through fossil fuels. When people burn fossil fuels it enters the atmosphere as carbon dioxide gas. Another way is through animals. Most animals exhale carbon dioxide as a waste product which gets into the atmosphere.

Answer:

See explanation

Explanation:

According to Louis de Broglie, particles could exhibit wavelike properties and have an associated wavelength.

Now for a turtle with a mass of 450. g, 29. cm long, moving at 2.7 cm/s, recall that we can only describe a by quantum mechanics when the body is very small and its associated wavelength is large.

This object has a large mass, hence it is discussed by classical rather than quantum mechanics

Answer:

Hey!

Explanation:

I dont know the answers but Cell walls and Cloroplasts are only in plant cells. I hope this helps!

Answer:

68

Explanation:

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Answer:

2K   +   2H₂O   →   2KOH  + H₂

Explanation:

The reactants are:

    Potassium metal  = K

    Water  = H₂O

 The products are:

  Potassium hydroxide  = KOH

  Hydrogen gas  = H₂  

The reaction equation is given as;  

                Reactants   →   Products

        2K   +   2H₂O   →   2KOH  + H₂

The reaction is a single displacement reaction

Answer:

I believe it is 1771 divided by 4

Explanation:

Answer:

Mass =  799971.50 g

Explanation:

Given data:

Mass of ethene = 560 Kg (560 Kg ×1000 g/1 Kg= 560000 g)

Mass of ethanol produced = ?

Solution:

Chemical equation:

C₂H₄ + H₂O      →     C₂H₅OH

Number of moles of ethene:

Number of moles = mass/molar mass

Number of moles = 560000 g / 28.05 g/mol

Number of moles = 19964.35 mol

Now we will compare the moles of ethene and ethanol.

            C₂H₄        :         C₂H₅OH

               1            :            1

       19964.35      :         19964.35

Mass of ethanol:

Mass = number of moles × molar mass

Mass =  19964.35 mol × 46.07 g/mol

Mass =  799971.50 g

Answer:

2HgO <---- 2Hg + O2

Explanation:

Answer:

mechanical energy

Explanation: