Chemistry High School

¿How do the products of the reaction to the phenol red test and the splint test? Please help me it's for today.! :((​

Answers

Answer 1

Answer:

The answer in this question is show you made Sodium Hydroxide and Hydrogen Gas.In order to do the products of the reaction relate to the phenol red test and the splint test you need to show that you made Sodium Hydroxide and Hydrogen Gas. Show that you made Sodium Hydroxide and Hydrogen Gas so that the products of the reaction relate to the phenol red test and the splint test.

Related Questions

How much copper is present in a cube that measures 3.20cm on each side, if the density of copper is 8.96 g/mL

Answers

Answer:

290.32 g

Explanation:

First we calculate the volume of the cube:

Volume = (3.20 cm)³ = 32.768 cm³

Now we convert cubic centimeters to mililiters:

32.768 cm³ * 1 mL / 1 cm³ = 32.768 mL

Finally we calculate the mass, using the equation for density:

Density = mass / Volumemass = Density * Volumemass = 8.86 g/mL * 32.768 mL = 290.32 g

write any three reason for the profuse use of plastic . although it is harmful .​

Answers

(1)Plastics (i.e. synthetic polymers) are used frequently for many applications because they tend to be (a) easy to fabricate items with, by moulding, or other methods, (b) can be strong even though very lightweight, so useful for making items that require good physical strength, as well as things like packaging which need to be able to support the contents correctly, (c) relatively low cost (especially overall, when ease of fabrication is taken into account.
(2)The "use" of plastics is not harmful per se, and plastics themselves are innocuous (one reason that they fail to readily biodegrade is that they do not interact with biological systems). But poor manangement of waste plastic can lead to problems.
(3)Failing to recycle and reuse synthetic polymers can lead to those items not landfilled (which is a separate issue - ultimately we would run out of landfill sites) items ending up in the sea, rivers or in the general environment where they can be hazardous to wildlife, and look unsightly.
But that is down to poor management, and societal attitudes, not down to the fact that the items are made of plastics.
(4)If we failed to manage sewage and simply discharged that into the streets or into rivers that would be a major problem too. But that doesn't mean we should "ban sewage" - just manage it in an effective way.

1. Suppose that the volume of a gas in a cylinder is 1.35 L at a pressure of 2.15 atm. What is the new volume if the
pressure is decreased to 1.86 atm? (Temperature and amount of gas remain constant.)

Answers

2.15 subtract by 1.86 then add 1.35 I think ...

The volume of a gas in a cylinder is 1.35 L at a pressure of 2.15 atm, if the pressure is decreased to 1.86 atm then the new volume is 1.56 L.

What is pressure?

Pressure is defined as the force applied perpendicular to the surface of an object per unit area over which the force is distributed.

It can also be defined as the force exerted on a given area.

Pressure can be expressed as

Pressure = force / area

There are mainly four types of pressure

Absolute pressureGauge pressureDifferential pressureVacuum pressure

Using the formula P1V1 = P2V2

As given P1 = 2.15, V1 = 1.35 and P2 = 1.86

So, V2 = P1V1 / P2

           = 2.15 x 1.35 / 1.86

           = 1.56 L

Thus, the volume of a gas in a cylinder is 1.35 L at a pressure of 2.15 atm, if the pressure is decreased to 1.86 atm then the new volume is 1.56 L.

To learn more about  pressure, refer to the link below:

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Plssssssssssssssss help me!!!!!
It's due soon!!
It's worth 4 marks about bonding.

Answers

Answer:

See explanation

Explanation:

Ammonia is a covalent molecule. We should remember that a covalent molecule is formed by the sharing of electrons.

Now hydrogen has only one valence electron while nitrogen has five valence electrons. Two among these five valence electrons is a lone pair of electrons.

Three hydrogen atoms can share one electron each with all of the available valence electrons in nitrogen to form NH3 with the lone pair of electrons still localized on the nitrogen atom.

1) How many radial seconds are in 80 degree angle?

Answers

Answer:

288000 sec

Explanation:

hi can you help me with these questions please
Molecular masses
1. CaCo3 (calcium carbon)
2. C6H12O6 (glucose)
3. Fe2O2 (iron oxide 11)
Avogadro's number
1. A sample of iron is known to contain 2.35 mol of Fe. How many iron atoms are there in the sample?
2. how many molecules are present in 150 grams of sulfuric acid (H2SO4)
Molar volume
1. What volume will 110g of dichloro (CI2) occupy when under normal conditions? 2. If you have 600g of CO2 gas and knowing that its molecular mass is 44g / mol, find
a) the number of moles
b) the number of molecules
c) the volume it occupies under normal conditions of pressure and temperature.​

Answers

Answer:

iron oxide11

Explanation:

iron oxide is the chemical compound with formula fe304. it occurs in nature as the mineral magnetite.

I agree with the person on top have a beautiful day:)

Chemical energy is contained in the chemical bonds of a substance. True or False

Answers

Chemical energy is energy stored in the bonds of chemical compounds, like atoms and molecules. This energy is released when a chemical reaction takes place. Usually, once chemical energy has been released from a substance, that substance is transformed into a completely new substance.

Help please I will give brainliest ASAP

Answers

Answer:

2H2S + 3O2 --> 2H2O + 2SO2

2 mol H2S/8 mol H2O = 0.25 mol

Explanation:

Reactants: H is 2; S is 1; O is 2

Products: H is 2; S is 1; O is 3

There are 3 oxygens so add a 2 to the H2O e and 3 to the reactants side.

H2S + 3O2 → 2H2O + SO2

Reactant side: H is 2; S is 1; O is 6

Product side: H is 4; S is 1; O is 4

Hydrogen is now out of balance, so a coefficient of 2 can be placed in front of H2S to give:

2H2S + 3O2 → 2H2O + SO2

Reactant side: H is 4; S is 2; O is 6

Product side: H is 4; S is 1; O is 4

Sulfur is unbalanced, so a coefficient of 2 can be placed in front of SO2 to give:

2H2S + 3O2 → 2H2O + 2SO2

An atom of helium is smaller in width then an atom of hydrogen, but it's more then twice the mass. Why are these different?

Answers

Answer:

i think it cuz ones broken down by fision more

Explanation:

One mole of any gas at 298 K and 1 atm occupies a volume of 22.4 L.

Group of answer choices

True

False

Answers

that my friend is false.

Answer:

false darling

Explanation:

4. Calculate AH for the reaction
Ca(OH)2(aq) + 2HCl(aq) → CaCl2(aq) + 2H2O(1)
delta H = ?
Given:
CaO(s) + 2HCl(aq) + CaCl2(aq) + H2O(1) delta H = -186 kJ
CaO(s) + H2O) + Ca(OH)(s) delta H = -62.3 kJ
Ca(OH)2(s) + Ca(OH)2(aq)
delta H = - 12.6 kJ

Answers

Answer:

ΔH = -111.1kJ

Explanation:

ΔH of any reaction could be obtained from similar reaction doing algebraic operations. Using the reactions:

(1) CaO(s) + 2HCl(aq) → CaCl₂(aq) + H₂O(l) ΔH = -186 kJ

(2) CaO(s) + H₂O(l) → Ca(OH)₂(s) ΔH = -62.3 kJ

(3) Ca(OH)₂(s) → Ca(OH)₂(aq)  ΔH = - 12.6 kJ

(1) - (2):

Ca(OH)₂(s) + 2HCl(aq) → CaCl₂(aq) + 2H₂O(l)

ΔH = -186kJ - (-62.3kJ) = -123.7kJ

This reaction -(3):

Ca(OH)₂(aq) + 2HCl(aq) → CaCl₂(aq) + 2H₂O(l)  

ΔH = -123.7kJ - (-12.6kJ) = -111.1kJ

ΔH = -111.1kJ


20 points
Which of the following objects below is NOT needed to test electrical conductivity?
battery
object powered by electricity
insulated wire
electrical tape

Answers

Answer:

I`m pretty sure it`s electrical tape.

Explanation:

The objects which does not conduct electricity are called insulators which are not needed to test electrical conductivity. Hence, insulated wire is the correct option.

What is conductivity ?

Conductivity of a substance is the ability to conduct electrically or thermally through the substance. Based on their conductivity, there are three classes of materials conductors, semiconductors and insulators.

Conductors are materials conducting heat and electricity at all temperatures. Semiconductors conduct only at higher temperature or on doping. Insulators are material does not conduct at any condition.

Metals are good conductors. Silicon , germanium etc. are semiconductors. Whereas, wood, plastic etc. are insulators they does not allow flow of electrons through it. Therefore, an insulated wire is not needed to test conductivity.

Find more on conductivity:

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Different measures are used to specify amounts. The store has the same red delicious apples at two pricing options: a) 10 apples for $10.50 b) 3 lb bag of apples for $5.00 What do you need to know before you can select one of the above options?

Answers

Answer:

You need to know the weight in lb of 1 apple (or how manly apples there are in a 1 lb bag of apples)

Explanation:

Option a) presents the price for unit of apple: 10 apples for $10.50. So, the price of 1 apple is calculated as $10.50/10 = $1.05

Option b) presents the price for weight of a bag of apples: 3 lb bag of apples for $5.00. So, the price for 1 lb bag of apples is $5.00/3 = $1.66/lb. But we don't know how many apples there are in a 1 lb bag.

If we knew the approximate weight in lb of an apple, we would know how many apples there are in a 1 lb bag and then we can compare with the price for unit (option b vs option a). For example, if there is 1 apple in a 1 lb bag, option b) is more expensive than option a) ⇒ $1.66/apple > $1.05/apple

A substance joined by this type of bond has a low melting point

Answers

Covalent compounds have bonds where electrons are shared between atoms. Due to the sharing of electrons, they exhibit characteristic physical properties that include lower melting points and electrical conductivity compared to ionic compounds.

Answer:covalent bonds

Explanation:

A substance joined by this type of bond shares electrons

Answers

Answer: Covalent

Explanation:

A covalent compound is formed when an element shares its valence electron with another element. This compound is formed between two non metals. Example: [tex]HF[/tex]

An ionic compound is formed when an element completely transfers its valence electron to another element. The element which donates the electron is known as electropositive element or the metal and the element which accepts the electrons is known as electronegative element or non metal. Example: [tex]NaCl[/tex]

the metallic compound reduced to the metal by electrolysis is _____

please girls answer, because I think u r always right. ​

Answers

Answer:

Explanation:

u wanted to talk

Which gas is a greenhouse gas?

Argon
Methane
Nitrogen
Oxygen

Answers

Answer:

The answer is Methane

Hope it helped

Answer:

Methane

Explaination:

The main greenhouse gases are:

Water vapor.

Carbon dioxide.

Methane.

Ozone.

Nitrous oxide.

Chlorofluorocarbons.

Which phrase explains how a range of fault-block mountains forms? O A. Shear forces cause large earthquakes to happen often and suddenly O B. Tension affects a wide area of crust and causes many normal faults. C. Eruptions of volcanoes cause many reverse faults to happen slowly D. Compression affects a small area of crust and acts for a long period of time.​

Answers

Answer:

the answer is letter b eruptions

Is gold more reactive than lead​

Answers

Answer:

iron comes first then after its gold

Explanation:

most reactive to least reactive

potassium

sodium

calcium

magnesium

aluminium

carbon

zinc

IRON

tin

lead

hydrogen

copper

silver

GOLD

platinum

hope this helps!!

have a great day :)

Where does the sunlight energy enter from during photosynthesis?

Answers

Answer

Through the leaves

Explanation:

am i correct?????????????????????????????

Answers

Answer:

yep you are correct.

Explanation:

Yes this looks correct to me.

LADY LIBRITY

The statue of liberty is made of copper and over time has been oxidized by water and air, making it green instead of silver. What kind of weathering is this?”


erosion

physical weathering

deposition

chemical weathering

Answers

Answer:

D. Chemical weathering

Explanation:

Chemical weathering is the erosion or disintegration of rocks, building materials, etc., that are caused by chemical reactions. The green patina on the Statue of Liberty is a direct result of chemical weathering to copper.

Chemical weathering depicts the reaction of Copper of the statue.

What is Chemical weathering?

This is defined as the disintegration of a  substance through chemical reactions.

The statue was said to be made of Copper which was oxidized by water and air thereby changing its color from silver to green is an example of chemical weathering.

Read more about Chemical weathering here https://brainly.com/question/974321

What is a atmosphere

Answers

A layer that surrounds the earth :)

how is bacteria on mars counted as life but a heartbeat on earth is not?

Answers

Because if you get bacteria you will die and a heartbeat is basically how your living...

What does it mean if a trait is inherited

Answers

Answer:

An inherited trait is one that is genetically determined. Inherited traits are passed from parent to offspring according to the rules of Mendelian genetics.

Explanation:


How many Hydrogen atoms are in the following molecule? HCH3CCH2(NH3)2

Answers

There are nine hydrogen atoms

can someone help me please-

i just need some answers-

Answers

Answer:

1.Newton's first law is often called the law of inertia.

2.Newton's second law of motion is F = ma

3.An object not wanting to change its speed or direction

4.a bike would have more acceleration

5.it doesn't have auto brakes and its lighter than a motorcycle

6. Second law

7. First law

8. First law

9. Second law

10.  First law

Those should be right!

This is the process that cells reproduce and replace old or damaged cells.

Question 5 options:

Mitosis


Meiosis


Ribosomes


Cytokinesis

Answers

Answer:

Mitosis

Explanation:

This is the process that cells reproduce and replace old or damaged cells.

Find the mass of 3.66 moles of nitrogen.

Answers

Answer:

102.5166

Explanation:

Molar mass of N2 = 28.01

3.66 moles x 28.01 grams/mole = 102.5166

A. Look at the inheritance patterns. What do you notice?

Answers

Answer:

Explanation:

i notice that theri is no image so i wont be able to help you sorry

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