Helpppppppppppppppppp

Answer:

17.78 gm

Explanation:

2 H20 mole weight = 36 gm

   which leads to 32 gm   O2

36 / 32   =  20 / x      x = 17.78 gm

Answer: 2 mol of NaOH

Explanation:

The balanced chemical equation for the reaction is:

Na2O + H2O --> 2NaOH

Looking at this, we can see that 1 mol of Na2O will react with 1 mol of H2O to produce 2 mol of NaOH

Answer:

Count each type of atom in reactants and products. ...

Place coefficients, as needed, in front of the symbols or formulas to increase the number of atoms or molecules of the substances. ...

Repeat steps 1 and 2 until the equation is balanced

Explanation:

Step 1: Coefficients Versus Subscripts. When approaching a chemical equation, it is important that you understand the difference between coefficients and subscripts. ...

Step 2: Sum the Atoms. ...

Step 3: Balance the First Element. ...

Step 4: Repeat for the Other Elements. ...

Step 5: Tips.

Answer:

2C6H6 + 15O2 = 12CO2 + 6H2O

Explanation:

This is a combustion reaction meaning a substance (in this case Benzene or C6H6) reacts with oxygen gas (O2) and releases energy in the form of light and heat.

so Benzene (C6H6) and Dioxygen (O2) are reactants meaning they are on the left side of the equation

Carbon Dioxide (CO2) and Water (H2O) are the products meaning they are on the right side of the equation

To balance an equation you need an equal amount of each element/compound/polyatomic on each side of the equation

so 2C6H6 + 15O2 = 12CO2 + 6H2O:

(2•6) = 12 C = (12•C) = 12 C ~ 12C = 12C

(2•6) = 12 H = (2•6) = 12 H ~ 12H = 12H

(15•2) = 30 O2 = [(12•2) • (6•1)] = 30 O2

~ 30 O2 = 30 O2

so the equation is now balanced

feel free to ask if you have any other questions

hope this helps :)

Answer:

3 examples are beetles, a fly, and bees. Others include ants lady bugs and butterflies

Explanation:

A. water per day: 20 m/ height: 24cm/ mass: 3.1g B. Water per day: 60 ml/ height: 24cm/ mass: 9.6g

I think that the answer to this question is the third option. These two plants are of the same height but plant B has more mass. So therefore the statement is not true.

If this is a multiple-choice, then I would also select the fourth option along with the third. Plant B received more water, but it is the same height as plant A.

I hope my answer is satisfactory, and that I was of help to you.

-Toremi

Answer:

Yes

Explanation:

We have been created by him therefore we would not have been created if there was no God.

The amount of energy required to eat 5.25 g of Titanium from 85.5 celsius to 132.5 celsius is 129 joules.

Absorbed or released amount of heat will be calculated by using the below formula as:

Q = mcΔT, where

m = mass of titanium = 5.25g

c = specific heat of titanium = 0.523 J/gram degree celsius

ΔT = change in temperature = 132.5 - 85.5 = 47 degree celsius

On putting these values on the above equation we get,

Q = (5.25)(0.523)(47) = 129 joules

Hence required heat is 129 joules.

To know more about absorbed heat, visit the below link:

https://brainly.com/question/8828503

Answer:

Genotype

Explanation:

A mutation is the change is DNA, aka the genotype

For an adjustment of the alkalinity from 70 ppm to 100 ppm in a 250,000 gallon pool using sodium bicarbonate, the amount of added chemical  is mathematically given as

X=105lbs

Generally, the equation for the Chemical added  is mathematically given as

X=requred usage*desired change/10ppm*pool of gallon/10000

Therefore

X=1.4*(100-70/10)*(250000/10000

X=105lbs

In conclusion, the added chemical

X=105lbs

Read more about Chemical

https://brainly.com/question/6876669

Addition of HCl  leads to te formation of blue CoCl4^2– while the addition of AgNO3 leads to the formation of pink  Co(H2O)6^2+.

Dynamic equilibrium is said to have been attained in a reaction when the rate of forward reaction is equal to the rate of reverse reaction. Now we have the equilibrium as shown in the image attached.

When we add HCl as in trial 1, the equilibrium position is shifted to the left and blue CoCl4^2– is formed. When we add AgNO3, the Cl^- is precipitated out of solution and the equilibrium shifts towards the left to yield pink Co(H2O)6^2+.

Learn more about equilibrium: https://brainly.com/question/13463225?

The compounds that can dissociate in water from the options given below are;

Ba(NO3)2

CaSO4

Mg3(PO4)2

Dissociation of compound is the process by which compounds degraded into smaller unit which can also recombine to form larger one in another condition.

When ionic compounds dissociate in water, the water molecules separate the ionic crystal. This is because of the attraction between the positive and negative ions in the crystal.

Therefore, The following compounds dissociate in water.

Ba(NO3)2

CaSO4

Mg3(PO4)2

Learn more about dissociation of compounds here.

https://brainly.com/question/11835372

Answer:

a. C (s)+ 02(g)---->C02(g)

b. CO2(g) +C(s)--->2CO(g)

Explanation:

This reaction is the method of purification of some precious metals such a iron(Fe) in it's ore. a.The carbon(coke) is oxidized to carbon (IV) oxide

b. the carbon dioxide gas is reduced with the same carbon to produce carbon(II) oxide.

Considering the definition of dilution, the molarity of a solution prepared by diluting 7.0 mL of 4.0 M solution to a volume of 30 mL is 0.93 mL.

First of all, you have to know that when it is desired to prepare a less concentrated solution from a more concentrated one, it is called dilution.

Dilution is the process of reducing the concentration of solute in solution, which is accomplished by simply adding more solvent to the solution at the same amount of solute.

In a dilution the amount of solute does not change, but as more solvent is added, the concentration of the solute decreases, as the volume (and weight) of the solution increases.

A dilution is mathematically expressed as:

Ci×Vi = Cf×Vf

where

In this case, you know:

Replacing in the definition of dilution:

4 M× 7 mL= Cf× 30 mL

Solving:

(4 M× 7 mL)÷ 30 mL= Cf

Cf= 0.93 mL

In summary, the molarity of a solution prepared by diluting 7.0 mL of 4.0 M solution to a volume of 30 mL is 0.93 mL.

Learn more about dilution:

brainly.com/question/20113402

brainly.com/question/22762236

Answer:

I believe is the correct answer

Explanation:

hydrochloric

Answer:

Spring tides happen 2 times each month at the New and Full phases

Neap tides happen 2 times each month at the First Quarter and Third Quarter phases

Answer:

The five steps involved in the process of natural selection are

Variation • Inheritance • Selection • Time • Adaptation

☆anvipatel77☆

•Expert•

Brainly Community Contributor

Answer:

They are converted into glucose, they are a source of energy for the body

Explanation:

that's the answer

Answer: try thinking with your eyes close

Explanation:

[tex] \mathrm\pink{Almost \: all \: fossils \: are \: in \: sedimentary \: rocks.} [/tex]

Answer:

I'm not sure

Explanation:

I'm just not sure

Answer:

its axis

Explanation:

the earth rotates on its axis 24 hrs a day in relation to the sun.

In the video "Are Wormholes The Answer To Time Travel?"Wormholes have been described as hypothetical space-time tunnels or bridges connecting two different locations in space-time allowing faster-than-light travel or perhaps time travel.

Investigating the question of whether wormholes can be used for time travel is "Are wormholes the answer to time travel?" The film explains that wormholes are hypothetical constructs that can join two different points in space-time, allowing travel faster than the speed of light and even time travel.

The video discusses the characteristics of wormholes, including their size, shape, and possible existence. In the film, several ideas and models, such as Einstein's theory of general relativity and the idea of ​​negative energy, have been put forward by physicists and other scientists to explain the potential of wormholes.

Therefore, in the video "Are Wormholes The Answer To Time Travel?"Wormholes have been described as hypothetical space-time tunnels or bridges connecting two different locations in space-time allowing faster-than-light travel or perhaps time travel.

Learn more about Wormholes here:

https://brainly.com/question/14623513

#SPJ2

The volume of a gas that occupies 9 L at a temperature of 325K is 12.46L.

The volume of a given gas can be calculated using the following Charle's law equation:

V1/T1 = V2/T2

Where;

9/325 = V2/450

325V2 = 4050

V2 = 4050/325

V2 = 12.46L

Therefore, the volume of a gas that occupies 9 L at a temperature of 325K is 12.46L.

Learn more about volume at: https://brainly.com/question/2817451

Answer:

Electricity can be present in a static charge, while magnetism's presence is only felt when there are moving charges as a result of electricity. In simple words, electricity can exist without magnetism, but magnetism cannot exist without electricity.





HOPE THIS HELPS, HAVE A GREAT DAY!!~

Explanation:

Answer:

Explanation: “Insoluble” generally means that a substance does not dissolve in water. Some examples include: sand, fats, wood, metals, and plastic. When we put them in water and try to mix them, they will not dissolve.

Explanation:

The substance Z will be a poison if it produces adverse effects on th body even in small quantities.

A poison is a substance which when ingested into the body of an organism causes harm or injury to that organism.

Poisons can be in gaseous, solid or liquid form.

Poisons may be natural or synthetic in nature.

The characteristics of poison include:

Therefore, the substance Z will be a poison if it produces adverse effects on th body even in small quantities.

Learn more about poisons at: https://brainly.com/question/24442473

Energy + SO2(g) -----> S(g) + O2(g) is an edothermic reaction owing to te fact that energy is a reactant in the equation.

An endothermic reaction is one in  wioch energy is supplied to the system in order to enable the breakdown of bonds. Hence, the reaction vessel feels cool as energy is withdrawn from the surroundings.

The reaction;  Energy + SO2(g) -----> S(g) + O2(g) is an edothermic reaction since energy is a reactant in the equation.

Learn more about endothermic reaction: https://brainly.com/question/10373907