which of the following changes different colours in alkalis,acids,and neutral substances?

A red litmus paper
B Blue litmus paper
C universal indicator
D all of the above​

Answers

Answer 1
B I think if not it’s for sure a
Answer 2
A and B I think we did some experiments in chemistry but I don’t remember.

Related Questions

In the case of pathogen infections, chronic inflammation indicates

that the host does not have functional defense mechanisms.

that the host is fighting a lengthy battle against the pathogen.

that the pathogen has become an established part of the host's resident microbiota.

that the pathogen infection has been effectively overcome by the host.

Answers

Answer:

The answer is that the pathogen has become an established part of the host's resident microbiota. :)

Have an amazing day!!

Please rate and mark brainliest!!

HELP ANYONE PLEASE ASAP TYY!!!

Answers

In ecosystems, matter and energy are transferred from one form to another. Matter refers to all of the living and nonliving things in that environment. Nutrients and living matter are passed from producers to consumers, then broken down by decomposers. Decomposers break down dead plant and animal matter.

i hope this helps :)

PLEASE HELP ASAP
What does it mean that the collisions between gas particles are elastic?

Answers

Answer:

There is no net loss of energy from the collisions.

Explanation:

Gas particles are constantly colliding with each other and the walls of their container. These collisions are elastic; that is, there is no net loss of energy from the collisions. Gas particles are small and the total volume occupied by gas molecules is negligible relative to the total volume of their container.

It means that there is no net loss of energy from the collisions. An elastic collision is one in which there is no overall loss of kinetic energy.

What is the best reason that fire is not considered a living organism?.

Answers

Answer:

all living organisms have cells fire does not

Which of the mechanical waves below has the most energy?
A. Red
B. Blue
C. Green
D. Gold

Answers

Answer:

A. Red

Explanation:

how do you find the oxidation numbers for H3PO4

Answers

The oxidation number of this atom is probably +5, but it really depends on the reaction. Could you send me the picture of the reaction? Then I can help you further :)

what could you and your classmates do to reduce human impact on land

giving brainiest

Answers

Answer:

have controlled population!

Explanation:

1. Define the unit 'mole'

Answers

Answer:

Below

Explanation:

The mole, symbol mol, is the SI base unit of amount of substance. The quantity amount of substance is a measure of how many elementary entities of a given substance are in an object or sample

Complete and balance the following equation K+H2O

Answers

Explanation:

hello

2K + 2H2O ==》2KOH + H2

Which additional product balances the reaction H2SO4 + 2NaOH → Na2SO4 + ________?

2H2O
2OH
H2O2
H3O

Answers

Answer:

2H2O

It's a double displacement reaction

It is H3O for the balance

giving brainliest please help!

Answers

It should be a because the molarity of the hydrochloric acid is less.

What is the pressure in a 8.00 L tank with 50.5 grams of chlorine gas at 365 K?

Answers

The pressure in a 8.00 L tank with 50.5 grams of chlorine gas at 365 K is 2.67atm.

How to calculate pressure?

The pressure of a given mass of gas can be calculated using the following formula:

PV = nRT

Where;

P = pressureV = volumeT = temperaturen = no of molesR = gas law constant

The number of moles in 50.5g of Chlorine gas is as follows:

moles = 50.5/70.91

moles = 0.71mol

P × 8 = 0.71 × 0.0821 × 365

8P = 21..34

P = 21.34/8

P = 2.67atm

Therefore, the pressure in a 8.00 L tank with 50.5 grams of chlorine gas at 365 K is 2.67atm.

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What is Solution Concentration with examples​

Answers

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Solution Concentration or the concentration of the solution.The amount of solute dissolved in a particular amount of the solvent is a crucial parameter and is called Solution Concentration

EXAMPLE →

if you add one teaspoon to two cups of water, the concentration could be reported as 1 t salt per 2 c water.

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A sample of no2 occupies 16,500 ml at stp. How many no2 molecules are in the sample?.

Answers

here it is! mL to Liters to moles to molecules

According to Avogadro's law equal volume of all gases at the same temperature and pressure contain equal number of molecules. At STP one mole of any gas behaving ideally occupies a volume of 22.414 L.

What is molar volume?

The volume occupied by one mole of a substance at a given temperature and pressure is defined as the molar volume at that temperature and pressure. The value of molar volume of an ideal gas at STP is important in stoichiometric calculations.

At STP, the number of molecules of a gas is given as:

Number of molecules of a gas (N) = V₀ in L /  22.414 × 6.022 × 10²³

Here  V₀ in L = 16500 = 16.5 L

N =  16.5 / 22.414  × 6.022 × 10²³

N = 4.433 × 10²³

Thus the number of molecules present is 4.432 × 10²³.

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1. -A mixture of aluminum metal and chlorine gas reacts to form aluminum chloride (AlCl3): 2Al(s) +
3Cl2(g) → 2AlCl3(s). How many moles of aluminum chloride will form when 5 moles of chlorine gas react
with excess aluminum metal?

Answers

Answer:

3.33 moles

Explanation:

We know that our limiting reactant is chlorine so we just have to figure out how much of the product aluminum chloride (AlCl3) would be formed from 5 moles of chlorine gas. As we can see in the balanced equation, the mole ratio of chlorine gas (Cl2) to aluminum chloride is 3:2 based on the coefficients of the species. All you have to do from here is divide the amount of moles of chlorine gas by its own coefficient and then multiply the number you receive by the coefficient of AlCl3.

5/3=1.66

1.66*2=3.33

How many grams are in 2.3 moles of N?

Answers

The amount of grams that are in 2.3 moles of N = 32.223 or 32/100
Because there are 14.01 grams per mile of nitrogen atoms.
So…
14.01 x 2.3= 32.223
Hope this helps :)

Answer:

Therefore, 40.4 grams are contained in 2 moles of Neon.

What is the molarity of NaCl when 5.0 moles of NaCl is dissolved in 2.0 L solution

Answers

Answer:

Molarity having mol/L that is moles of solute in per liters of solution.

mark as Brainliest please

Explanation:

substituted and expected value in the above education molarity equal to 0.5 mole by 2.0

Geysers are formed when groundwater is heated by nearby magma. Please select the best answer from the choices provided T F

Answers

Geysers result from the heating of groundwater by shallow bodies of magma. So this is true.
This answer would be true

1. A sulfur atom has 16 protons, 18 neutrons, and 16
electrons. A sulfide ion has a 2– charge. Which of
the following is the correct number of particles that
make up a sulfide ion?
a. 18 protons, 18 neutrons, and 16 elections
b. 16 protons, 18 neutrons, and 18 electrons
c. 18 protons, 16 neutrons, and 16 electronis
d. 14 protons, 18 neutrons, and 16 electrons
e. 15 protons, 17 neutrons, and 17 electronis

Answers

Answer:

b. 16 protons, 18 neutrons, and 18 electrons

Explanation:

Things to be remembered

Negative charge on any ionic species indicates gained the electrons

Positive charge on any ionic species indicates lost the electrons

A sulfur atom has 16 protons, 18 neutrons, and 16 electrons, A sulfide ion has a 2– charge which indicates that sulphur has gained two electron from any other atom, ion or species!

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The correct answer is B. Because the number of atoms it has is 16. We also know that it has 2- charge

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what is the ph of 1.0 times 10^-2 M HBr

Answers

Answer:

The pH of a solution with the [H + ] = 1 × 10 -2 M is 2 and the pH of a solution with the [H + ] = 1 × 10 -10 M is 10. ( I think this is correct ).

Explanation:

_______ are similar to molecular formulas but show how atoms are bonded together.

Answers

Answer

The structural formula are similar to molecular formulas but show how atoms are bonded together.

Explanation:

The structural formula for a compound gives the same information as its molecular formula (the types and numbers of atoms in the molecule) but also shows how the atoms are connected in the molecule.

9. A 2.00 L flask is filled with propane gas (CH) at a pressure of 1.00 atm and a
temperature of -15.0°C. What is the mass of the propane in the flask?

Answers

the correct amswer is 4.17g

What type of probes physically land on the surface of a planet or moon?

Answers

Answer:

Here are three types of probes that land on space physically. Interplantery, orbiters, and landers.

Explanation:

These are the ones that collect data and other stuff from space.

Which substances are contained in saliva and tears to break down pathogens?

enzymes
acids
oils
sweat

Answers

Answer:

A. Enzymes

Explanation:

Enzymes are in our saliva and tears. They help break down pathogens and the cell wall of bacteria.

I hope it helps! Have a great day!

Muffin~

Answer:

A. Enzymes.

Explanation:

Enzymes break down things and they are in both our saliva and tears.


I hope it helps! Have a great day!

.-.

The pressure of a gas sample at 60.0 °C is decreased from 3.40 atm to 2.60 atm by cooling at a constant volume. What is the temperature (in °C) of the gas at 2.60 atm?

Answers

When the pressure of a gas is decreased from 3.40 atm to 2.60 atm, the temperature of the gas will decrease from 60.0 degree celsius to 45.88 degree celsius.

What is Gay-Lussac law?

Gay -Lussac law states that the pressure and temperature is in direct proportions. Thus, pressure increases with an increase in temperature. The relation can be mathematically expressed as follows:

P/T = a constant. Hence,

P1/T1 = P2/T2

The initial pressure of the sample is given, 3.46 atm and the initial temperature is 60 °C. The final temperature of the gas when gas the expand to the lower pressure of 2.60 atm is calculated as follows:

[tex]T_{2} = \frac{P_{2}T_{1}}{P_{1}}[/tex]

    = (60 °C× 2.60 atm) / 3.40 atm

    = 45.88 °C.

Hence, the final temperature of the gas which is expanded from the pressure of 3.40 atm to 2.60 atm with an initial temperature of 60 °C is  45.88  °C.

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If a gas has a volume of 1.25 l at a temperature of 300 k, what will the volume change to if the container is cooled to 200k

Answers

The volume of the gas when the container is cooled from a temperature of 300 K to 200 K is 0.83 L

Charles' law

Charles' law states as follow:

V₁ / T₁ = V₂ / T₂

Where

V₁ is the initial volume T₁ is the initial temperature V₂ is the new volume T₂ is the new temperature

How to determine the new volume

From the question given above, the following data were obtained

Initial volume (V₁) = 1.25 LInitial temperature (T₁) = 300 KNew temperature (T₂) = 200 KNew Volume (V₂) =?

V₁ / T₁ = V₂ / T₂

1.25 / 300 = V₂ / 200

Cross multiply

300 × V₂ = 1.25 × 200

Divide both side by 300

V₂ = (1.25 × 200) / 300

V₂ = 0.83 L

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The buffer that is adjusted to control acid-base balance is ________. plasma protein hemoglobin phosphate buffer bicarbonate: carbonic acid buffer

Answers

The buffer that is adjusted to control acid-base balance is referred to as a bicarbonate buffer.

What is a Buffer?

This consists of a weak acid and its conjugate base, or vice versa and resist changes in the pH of the solution.

The bicarbonate buffer is involved in acid-base homeostasis by removing CO2 and hydrogen ions, respectively, from the body.

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I dont understand. Please help me.

Answers

Answer:

B

Explanation:

it's has more water and will go active way faster

Answer:

Beaker b

Explanation:

This is because the temperature in beaker b is higher. Hot water has more kinetic energy. Therefore, it's particles move faster and collide more frequently with the particles of antacid tablet. So, the reaction occurs faster.

Hope this helps =)

2) The coregion in the area of the Texas Panhandle. This coregion is level plates that ranges in elevation from 3000 to 4500. This is very fry dry and
the characteristics of this coon we would expect to see plenty of
A) wind ersoin
B) water ersoin
C) deposition of sediment

Answers

Answer:

the correct answer is B po sure po ako

Explanation:

Sure na sure po

Answer:

The map shows the various ecoregions of Texas. Which ecoregion is most vulnerable to wind erosion from hurricanes originating in the Gulf of Mexico? desert. A.

Explanation:

Draw the major product of the given reaction. Include minimized formal charges.

Answers

The major product of the given chemical reaction is given as drawn in the attached picture.

What is a Major Product in Chemistry?

A major product in chemistry refers to the product whose amount is the greatest after a chemical reaction has taken place.

In order to find the major product, it is required for the Markovnikov Rule to be applied.

This rule states that when hydrogen is mixed with carbon with more hydrogen, then the major product will be gotten.

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