What is an indicator? What does it tell you about solutions?

Answers

Answer 1

Answer:

Pure water is neutral, and so is petrol. An indicator is a substance that changes colour when it is added to acidic or alkaline solutions. You can prepare homemade indicators from red cabbage or beetroot juice - these will help you see if a solution is acidic or alkaline.


Related Questions

Are the oldest rocks in the canyon found near the bottom

Answers

Answer: yes they are

Explanation:

because its so hot and the heat just stays at the bottom


Which statement offers an explanation for why some parts of John Dalton's atomic theory were proven to be false?

Scientists today are more diverse and have more educational training

Mistakes were made in key calculations during experimenting

Extensive repeated testing was not completed to verify the results

Technology available at that time was limited.

Answers

Answer:d

Explanation:

Answer:

The answer is D

Explanation:

I took the test!

Which cell organelle controls the activities for the cell?

Answers

Answer:

[tex]the \: nucleus \:[/tex]

Explanation:

[tex]the \: nucleus \: is \: organelle \: that \: controls \\ \:a ll \: cellular \: activities.[/tex]

How
myny moles are present in 5.6x1022 atoms of Ne? (0.09 moles Ne)
Sot ne10.05

Answers

Answer:

mole = no of atoms/ 6.02E23.... so therefore answer= 5.6E22/6.02E23= 0.093✨

Describe how the particle motion is different from state to state.

Answers

Answer:

The particles in a gas are moving very quickly in random directions.

The particles in a solid are tightly packed and locked in place, and they are vibrating in their place.

The particles in a liquid are close together (touching) but they are able to move/slide/flow past each other.

brainliet please?

x

Can you tell me the Valence Electron of each element?​

Answers

Answer:

Lithium oxide.......................

Explanation:

6. magnicium chloride

2.Barium chloride

3. calcium nitride

4. lithium oxide

5. Aluminium sulphide

plzz mark me brainliest

Which symbol and unit of measurement are used for resistance?
symbol: R: unit :
symbol: 0; unit: R
symbol: R: unit o
symbol: R: unit R

Answers

Answer:

Unit of resistance is Ω (Omega).

Explanation:

The ability to measure the oppose the flow of electric current is called resistance of a circuit. Its relation with voltage and current is given by Ohm's law as follows :

V = IR

R is resistance

Its unit is Omega and it is represented by Ω.

The unit of the electrical resistance is ohm Ω

The symbol of resistance is R.

Hence Option A) Symbol: R, Unit : Ω is the correct answer

What is resistance?

Resistance is simply the measure of the opposition to current flow in an electrical circuit.

Ohm’s law states that the potential difference between two points is directly proportional to the current flowing through the resistance.

V = I × R

Where;

V is the voltage or potential difference. I is the current.R is the resistance.

The unit of the electrical resistance is ohm Ω

The symbol of resistance is R.

Hence Option A) Symbol: R, Unit : Ω is the correct answer

Learn more about Ohm’s law here: brainly.com/question/2364325

#SPJ5

What is a hypothesis?
O proof and evidence of a scientific fact
O a question about nature and how it works
a series of steps to carry out an experiment
O a possible explanation of or answer to a scientific question

Answers

Answer:

The 4th option

a possible explanation of or answer to a scientific question

Explanation:

Answer:

A hypothesis is a question about naturre and how it works

I need help with these two questions

Answers

halogens have 7

allali have 2

noble gases have 8

K = 1

P = -3

Ra= 7

Cl = -1

N = 5

O = 6

A student determines the density of an element to be 2.73 g/cm 3 . If the accepted value is 2.70 grams per cm 3 , what is the student's percent error? Identify the element. What is the boiling of this element in Celsius degree

Answers

Answer:

Explanation:

percentage error = error  x 100 / correct value

= (2.73 - 2.70) x100 / 2.70

= 1.11 %

The element is Aluminium whose density is 2.702 grams / cc

Boiling point of Aluminium = 2519⁰C .

2.18 x 10^6 ng = 2.18 x 10^? mg

Answers

Answer:

2.18 * 10^12 mg

Explanation:

1 nanogram [ng] = 10^6 milligram [mg]

2.18 * 10^6 ng/ 1 ng = X mg / 10^6 mg

X mg = 2.18 * 10^12 mg

Answer:

2.18 * 10^12 mg

Explanation

Which of the following is the abbreviation for the element Gold?

Answers

the abbreviation is Au

Answer:

Au

Explanation:

trust me, the abbrevation for gold is Au. chemicaly, Medicaly, and in dentistry

I beg you please please I beg you help me please I’m litterly crying please :(

Answers

Nitrogen is the answer

mortal kombat 11 or the new cyber punk which do u think is better

Answers

Answer:

personally I like the mortal kombat 11 better

Answer:

mortal combat 11.

psoriasis is a disease that causes a red rash on the skin. which body system does psoriasis affect?
a. respiratory
b. integumentary
c. immune
d. digestive
e. circulatory​

Answers

Answer:

The answer to this question is integumentary.

Explanation:

The answer is that because that is your skin area and so if you have a rash then if will affect that part.

It's b. integumentary

I got the test right

Hi I really need help

Answers

The first one is the answer

Answer:

A

Explanation:

Which chemical equation best represents the Law of Conservation of
Mass?
O H+ 0 -> H20
H2 + 02 --> H20
2H2 + O2 --> 2H20
H2 + O2 --> 2H,02

Answers

2H₂ + O₂ ⇒ 2H₂O

Further explanation

Conservation of mass states that

In a closed system, the masses before and after the reaction are the same

So it can be concluded

mass of the reactants = mass of the productsmass cannot be created or destroyedThe number of atoms involved in a reaction remains the same⇒ number of moles also the samechemical equation in balanced form

So let's see which of the several options , which one has the same number of atoms on both sides of the equation

2H₂ + O₂ ⇒ 2H₂O

H ⇒ left 4, right 4

O ⇒ left 2, right 2

so the equation is in balance and represents the Law of Conservation of

Mass


Which type of matter is always made up of only one kind of atom?
A. Element
B. Mixture
C. Molecule
D. Compound
pls answer fast

Answers

Answer:

A. element

Explanation:

Answer: Element

Explanation: A substance that is composed of only one type of atom is called an element. At this point, what should amaze you is that all forms of matter in our universe are made with only 118 different building blocks.

Examine the layers of rock. Identify and explain which layer contains the youngest fossils.

Earth layers with fossiles in each labeled top to bottom A to D.

Answers

Answer:

Layer A is the youngest

Explanation:

It is at the top, it has all of the dinosaur bones which got buried after earth got hit with an asteroid and they went extinct. Layer D started it and all of these years dirt, soil, and fossils have been gathering making each layer before older and older.  

Each of the atoms in alkali earths metal Family( group 2) has ___ valence Electrons .

Pleasee help I’ll mark you as brainlister
Fill in the blank

Answers

Answer:

the answer is 2 valence electrons

You are a high school track & field coach and you have a young female athlete who is running a competitive mile pace (5:20). This would make her competitive at the state and national level. You want to help this athlete to maintain and even increase her competitive potential. What would you do?

Answers

Answer:

By ensuring she is giving speed endurance training

Explanation:

Speed endurance training would be the most ideal in helping an athlete to maintain and even increase her competitive potential.

The speed endurance training would help the athlete maintain and attain a high speed for a longer duration of time.

This would make the athlete get used to running an improved time for much longer distances.

How many particles in 32.0 liters of helium

Answers

Number of particles : 8.603 x 10²³

Further explanation

Standard conditions for temperature and pressure are used as a reference in certain calculations or conditions

Assumption⇒ Standard Conditions

Conditions at T 0 ° C and P 1 atm are stated by STP (Standard Temperature and Pressure). At STP, Vm is 22.4 liters/mol.

1 mol = 6.02 x 10²³ particles (atoms, ions, or molecules)

32.0 liters of Helium

[tex]\tt mol=32:22.4=1.429[/tex]

Number of particles :

[tex]\tt 1.429\times 6.02\times 10^{23}\\\\=8.603\times 10^{23}[/tex]

a person who has non-functional cone type won't be able to identify the_____________of
fill in the blank.
A.color
B. shape
C. size​

Answers

Answer:

A

Explanation:

more domunit

i need help and it’s for science cause i have a bad grade in it and have 3 days to get all my grades up so help pls?

Answers

Pretty sure it’s the last one

if an object has a mass of 30 grams and a volume of 6 cubic cm. what is its density

Answers

Answer:

5

Explanation:

mass/volume = density

30/5 = 5

how many atoms is in a molecule of omega 3 fatty acid

Answers

Answer:

There are 18 carbon atoms in a molecule of omega 3 fatty acid

Explanation:

This answer to this is 18

What is the relationship between the atomic mass of an element and a mole of that element's atoms?

Answers

Answer:

Each ion, or atom, has a particular mass; similarly, each mole of a given pure substance also has a definite mass. The mass of one mole of atoms of a pure element in grams is equivalent to the atomic mass of that element in atomic mass units (amu) or in grams per mole (g/mol).

Explanation:

The relationship between the given terms is provided below throughout the below segment.

One mole of such a component's atomic weights is approximately equivalent to that component's atomic mass. This same atomic mass of the oxygen element, for example, is about 16g. As a result, one mole containing oxygen atoms equals 16g of oxygen ([tex]O_2[/tex]). 1 mole containing oxygen atoms weighs 16g.

We can say that,

→ [tex]1 \ mole \ in \ gram \ of \ an \ element = Atomic \ mass \ of \ an \ element[/tex]

 

Learn more about atomic mass here:

https://brainly.com/question/18333006

Which of the following is the end product of a natural
radioactive series?

Answers

Answer:

Lead

Explanation:

Lead (Pb) is the end product of every natural radioactive series.

I need help with this. Plzzzzz

Answers

Answer:what do you nned help with

Explanation:

put 34,100,000 in scientific notation

Answers

Answer:

3.41 x 10^7

Explanation:

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