Can I Plz Have help?!?!?!?
(Q1) What is the correct value for coefficient (A)?

A. 1

B. 2

C. 3

D. 4


(Q2) What is the correct value for coefficient (B)?

A. 1

B. 2

C. 3

D. 4


(Q3) What is the correct value for coefficient (C)?

A. 1

B. 2

C. 3

D. 4


(Q4)What is the correct value for coefficient (D)?

A. 1

B. 2

C. 3

D. 4

(Q5) If there is enough energy and H2, then how many moles of Sn02 will react with 2 moles of H2 and produce 1 mole of Sn and 2 moles of H2O? How many moles of SnO2 does this balanced equation represent?

A. 0.5

B. 1.0

C. 1.5

D. 2.5


(Q6)The reactants in this equation are _________.

A. SnO2 and Sn

B. Sn and H2O

C. SnO2 and H2

D. H2 and H2O


(Q7)The products in this equation are _________.

A. SnO2 and Sn

B. Sn and H2O

C. SnO2 and H2

D. H2 and H2O


(Q8)This reaction is ___________.

A. endothermic

B. exothermic

Answer:

12

Explanation:

alkyne formula is CnH2n-2

heptyne = 7

The total number of hydrogen atoms in a molecule of heptyne is twelve (12).

Heptyne belong to alkyne family with one triple bond and the molecular formula can be determined as follows;

CₙH2ₙ-2

Heptyne contains 7 carbons

C7H[2x 7 - 2] = C7H12

Thus, we can conclude that, the total number of hydrogen atoms in a molecule of heptyne is twelve-12.

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Answer: covalent bond

Explanation: Yeah that's the answer

Answer:

False. The goal of chemistry is to accumulate knowledge. Sometimes true. Biochemistry involves ... Sometimes true. Applied Chemistry is used to attain specific goals ... Applied Chemistry.

Explanation:

I really hope this helped :)

Answer:

Explanation:

The Rock Cycle is a group of changes. Igneous rock can change into sedimentary rock or into metamorphic rock. Sedimentary rock can change into metamorphic rock or into igneous rock. Metamorphic rock can change into igneous or sedimentary rock.

Igneous rock forms when magma cools and makes crystals. Magma is a hot liquid made of melted minerals. The minerals can form crystals when they cool. Igneous rock can form underground, where the magma cools slowly. Or, igneous rock can form above ground, where the magma cools quickly. idk if this helped*

Answer: 50. 4g

Explanation:

First calculate number of moles of aluminium in 38.8g

Moles = 38.8g/ 26.982mol/g

= 1.44mol

By looking at the balance equation you can see that 4 moles of aluminium produce 2 moles of aluminium oxide.

4 = 2

1.4 = x

Find the value of x

x= (1.4×2)/4= 0.72 mol

0.72 moles of aluminium oxide are produced from 38.8g of aluminium

Now find the mass of aluminium produced.

Mass = moles × molar mass

= 0.72mol × 69.93 mol/g

= 50.4g

Answer:

B. The mass defect represents the mass converted to binding energy.

Explanation:

I just took a quiz on a pe x  and it was correct! :)

Relation of mass defect to binding energy in the nucleus expresses by the statement that the mass defect represents the mass converted to binding energy.

Mass defect is the difference in the mass which is obtained by the difference between the total mass of nucleus and sum of the mass of the constituent particles of nucleus.

Binding energy is the amount of energy which is released dueing the formation of the nucleus of any any element and this energy is released because of the presence of the mass defect of nucleus.

Binding energy is directly proportional to the mass defect and calculated as:

B.E. = mc, where

m = mass defect

c = speed of light

Hence, mass defect represents the mass converted to binding energy.

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Answer:

22 g of CO2 are obtained from decomposition of 50 g of CaCO3

Explanation:

Answer:

A mixture is a material composed of two or more simpler substances in chemistry.

Explanation:

Answer:

216 K

Explanation:

T2=T1P2/P1

Change C to K

Answer:

mercury, mars, venus

Explanation:

Yes, the Earth is Older than most of the Rock Layers.

About 6,000 years ago God created light to divide the darkness. The next day created the atmosphere and the oceans so there was no land yet. But on the next day he created the land that divided the water and vegetation was created.

These are true facts from Genesis 1

Answer:

A i believe

Explanation:

Answer:

Tectonic activity also causes volcanoes to erupt and occurs when plates bombard each other or when they are pulled apart. Once they erupt, they can alter the energy flow of the Earth. ... These particles have a cooling effect on the planet as they reflect the incoming solar radiation.

Explanation:

Answer:

The first person answer is correct

Answer:

Water is the solvent

Both the ethanol and the hydrogen peroxide are the solute

Explanation:

Both the hydrogen peroxide and ethanol are sisobable in water.

There are 0.05 moles of ethanol.

1 litreof water contains 55.55 moles of water.

0.2 g of hydrogen peroxide contains 0.2/34 = 0.0059 moles of hydrogen peroxide (the 34 is the molar mass of hydrogen peroxide).

Since there are more moles of water, water becomes the solvent and the other two liquids dissolve in it.

Answer:

I guess B

Explanation:

Answer:

The answer is D

Explanation:

Answer:

gravity that's what I rellat think it is

Answer:

C

Explanation:

Noon is the peak amount of sun shining. Therefore the plant will be carrying out a lot of photosynthesis using the light. Cellular respiration happens regularly as well

At midday, what is happening in the leaf of a plant would be photosynthesis and cellular respiration. The correct option would, therefore, be C.

Photosynthesis has two reactions:

The light dependent reaction is rate determining step of photosynthesis. Hence, photosynthesis proceeds at normal rate during the day.

Cellular respiration, on the other hand, takes place with or without light.

Hence, at 12 pm, Noon, both photosynthesis and cellular respiration will be taking place simultaneously in the leaf of plants.

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Answer:

1. V2.

2. 299K.

3. 451K

4. 0.25 x 451 = V2 x 299

Explanation:

1. The data obtained from the question include:

Initial volume (V1) = 0.25mL

Initial temperature (T1) = 26°C

Final temperature (T2) = 178°C

Final volume (V2) =.?

2. Conversion from celsius to Kelvin temperature.

T(K) = T (°C) + 273

Initial temperature (T1) = 26°C

Initial temperature (T1) = 26°C + 273 = 299K

3. Conversion from celsius to Kelvin temperature.

T(K) = T (°C) + 273

Final temperature (T2) = 178°C

Final temperature (T1) = 178°C + 273 = 451K

4. Initial volume (V1) = 0.25mL

Initial temperature (T1) = 299K

Final temperature (T2) = 451K

Final volume (V2) =.?

V1 x T2 = V2 x T1

0.25 x 451 = V2 x 299

Answer:

ITS A 25% trust me

Answer:

I think it is 25%

Explanation:

Answer:

When electrons are removed from an object, it becomes positively charged

An electrical charge is created when electrons are transferred to or removed from an object. Because electrons have a negative charge, when they are added to an object, it becomes negatively charged. When electrons are removed from an object, it becomes positively charged.

Answer: The alkane containing 100 hydrogens will be [tex]C_{49}H_{100}[/tex]

Explanation:

Saturated hydrocarbons are defined as the hydrocarbons in which a single bond is present between carbon and carbon atoms.These are called as alkanes. The general formula for these hydrocarbons is [tex]C_nH_{2n+2}[/tex]

As given number of hydrogen atoms is 100, therefore the value of (2n+2) = 100

2n = 98

n = 49

Thus the formula for the alkane containing 100 hydrogens will be [tex]C_{49}H_{100}[/tex]

The formula for the alkane containing 100 hydrogens is [tex]C_{49}H_{100[/tex]

It refers to hydrocarbons where a single bond is present that lies between carbon and carbon atoms. These are known as alkanes. The general formula for these hydrocarbons is [tex]C_nH_{2n+2}[/tex]

Since the given number of hydrogen atoms is 100, so the value of (2n+2) = 100

So,

2n = 98

n = 49

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Answer:

0.21 M

Explanation:

Molarity is the calculation of the solution in which the number of solute per liter of the solutions. It is the most common measurement unit that is used to measure the concentration of the solution.

The molarity is the unit that is used to measure or calculate the volume of the solvent. The amount of solvent is used in the chemical reaction.

The amount of the two solvent in the same quantity is measured by the formula called c1v1 and c2v2.

Explanation:

Thermal energy from the sun's heat, and mechanical energy from previous tides and waves. Oceans are one of the largest solar collectors.  

Answer:

The equilibrium shifts to the right, shifting towards the products, thereby favouring forward reaction, leading to the production of more product (NH₃) and a reduction in the rate of backward reaction, resulting in a decrease in the production of reactant N₂ in the reaction.

Explanation:

Complete Question

Given the equation representing a chemical reaction at equilibrium in a sealed, rigid container:

N₂ (g) + H₂ (g) ⇌ NH₃ (g)

When the concentration of H₂(g) is increased by adding more hydrogen gas to the container at constant temperature, the equilibrium shifts

Solution

Le Chatelier's Principle explains the behaviour of the equilibrium in response to disturbances in properties for chemical reactions.

The principle states that, if the concentration, temperature and/or pressure of a chemical reaction at equilibrium is changed, the equilibrium position shifts to remedy this changes.

So, for a chemical reaction at equilibrium, provided that the other factors such as temperature and pressure remain constant, if more reactants are added (more H₂ is pumped into the reacting container), the equilibrium responds by shifting to the right, shifting towards the products, thereby favouring forward reaction, leading to the production of more product (NH₃) and a reduction in the rate of backward reaction, resulting in a decrease in the production of reactant N₂ in the reaction.

Hope this Helps!!!

Answer:

Al2SO43 + 3 BaNO32 = 3 BaSO4 + 2 AlNO33

Explanation:

Answer:

Calcium.

Potassium.

Chlorine.

Magnesium.

Sodium.

Phosphate.

Explanation:

Answer:

469 gallons

Explanation:

From the question given, we were told that:

For every 32 miles, 1 gallon of gasoline is consumed.

With the above information, we can obtain the number of gallon of gasoline consumed by a car per year i.e 15000 miles

This is illustrated below:

If 32 miles consumed 1 gallon of gasoline,

Therefore, 15000 miles will consume = 15000/32 ≈ 469 gallons of gasoline.

Therefore, 469 gallons of gasoline is consumed by the average car each year

The

Answer:

See the answer below

Explanation:

When a solution of iodine is mixed with a solution of tetrachloromethane, the mixture turns purple due to the formation of [tex]I_2(CCl_4)[/tex].

Iodine solution dissolves in carbon tetrachloride solution (another name for tetrachloromethane) due to the fact that both solutions are similarly non polar in nature. The equation of the reaction is as shown below:

            [tex]I_2 + CCl_4 --> I_2(CCl_4)[/tex]