+++TO BE ANSWERED ASAP (WILL PUT BRAINLIEST!!!)+++

What does it mean that the filtered water samples reacted with phenolphthalein?

Answers

Answer 1

Answer:

Phenolphthalein is an acid indicator, which means when we add water (pH 7) to it, it ionizes giving a pink color. We all know acid gives in solution. When we add phenolphthalein to acid due to the common ion effect concentration increases. turned the solution pink.

Explanation:


Related Questions

Please help!
Answer please!

Answers

Answer: a

Explanation: a

Which is a valid velocity reading for an object?
45 m/s
45 m/s north
0 0 m/s south
0 m/s
Save and Exit
Next
Sunt
Mark this and retum

Answers

Next is the answer to the question

WILL MARK AS BRAINLIEST IF CORRECT
The temperature of an enclosed gas at constant pressure changes from 400 K to 100 K atm. What happens to the volume of the gas?

a
The volume will increase to 4 times its original volume.
b
The volume will stay the same.
c
The volume will decrease to 1/2 of its original volume.
d
The volume will decrease to 1/4 of its original volume.
e
The volume will increase to 2 times its original volume.

Answers

Answer:

a

Explanation:

they are directly proportional. if one goes down the other goes up while pressure is constant

Phản ứng nào sau đây chuyển glucozơ và fructozơ thành một sản phẩm duy nhất?
A. Phản ứng với Cu(OH)2, t0. B. Phản ứng với dung dịch AgNO3/NH3. C. Phản ứng với H2/Ni, t0. D. Phản ứng với Na.

Answers

Answer:

Aaaaaaaaaaaaaaaassplee

A dry soil sample has a volume of 500 mL. After 400 mL of water are added to the soil, the soil becomes saturated with 150 mL of surface water left on top. What is the porosity of the soil?

Please help me

Answers

The Answer is 50. hope this helps

The overall chemical reaction for photosynthesis
is shown below:
6CO2 + 6H2O → C6H1206 + 602
What mass of glucose (C6H1206) can form from
71.89 g CO2? (Molar mass of C6H1206 = 180.18
g/mol; molar mass of CO2 = 44.01 g/mol)
71.89 g CO2 =
Ig Cg H 1206
DONE

Answers

Answer:

49.05 g

Explanation:

6co2+6h20-c6h120+602

If repeated measurements agree closely but differ widely from accepted value these measurements are?

Answers

d. precise, but not accurate

What was John Dalton's contribution to the development of the atomic theory?

A
Dalton recognized that tiny atoms combined to form complex structures.

B
Dalton recognized the presence of electrons around a nucleus.

C
Dalton recognized the presence of protons in the nucleus.

Answers

Answer:

A. Dalton recognized that tiny atoms combined to form complex structures.

Why are engineers called applied scientist?​

Answers

Answer:

Applied science is a discipline that is used to apply existing scientific knowledge to develop more practical applications, for example: technology or inventions. In natural science, basic science (or pure science) is used to develop information to explain phenomena in the natural world.

Answer:

• Because engineers apply science and its theories into practical situation

Take an example of;

A generator: When creating a generator, electromagnetic induction theorem is applied. [ self and mutual inductance ]

A plane: The wings are made in considerance of Bernoulli principle and viscous drag

[tex].[/tex]

A flagpole is an example of what type of pulley system?

A. Movable pulley
B. Fixed pulley
C. Block and tackle?​

Answers

Answer:

B

Explanation:

i learned the pulley system in school

Answer:

B. Fixed pulley 

Explanation:

Convert 9.79 kilograms (kg) to decagrams (dg).
А
0.979 dg
B 97.9 dg
C979 dg
D
9,790 dg

Answers

Answer:

C) 979 dg

Explanation:

1 Decagram = 0.01 Kilogram, and 1 kilogram = 100 Decagram.

Hope this helps :)

Answer:

fsf

Explanation:

sdfsd

what is daltons theroy

Answers

Answer:

A theory of chemical combination, first stated by John Dalton in 1803. It involves the following postulates: (1) Elements consist of indivisible small particles (atoms). (2) All atoms of the same element are identical; different elements have different types of atom. (3) Atoms can neither be created nor destroyed.

Explanation:

LIST TWO REASONS WHY WE SHARE OUR RESULTS A SCIENTIFIC INVESTIGATION​

Answers

Publishing results of research projects in peer-reviewed journals enables the scientific and medical community to evaluate the findings themselves. It also provides instructions so that other researchers can repeat the experiment or build on it to verify and confirm the results.

What are the Characteristics of handwriting?

Answers

Line quality: Examiners determine whether the letters flow in a smooth manner, or in an erratic or shaky way.

Spacing: Examiners determine whether the letters have equal spaces from each other or crowded.

Size consistency: Examiners check the consistency in terms of the ratio of the letter's height to its width.

For X + Y → XY, if [XY] is increasing at a rate 0.10 M s-1, predict the rate of depletion of both reactants.

Answers

It’s 819. UWu Jan thanks s whhakswn shoaakb

What is the resultant force of a motorcycle travelling at 500 N with an air resistance of 50 N

Answers

[tex]▪▪▪▪▪▪▪▪▪▪▪▪▪  {\huge\mathfrak{Answer}}▪▪▪▪▪▪▪▪▪▪▪▪▪▪[/tex]

The resultant force is equal to :

[tex]500 - 50[/tex]

[tex]450 \: \: N[/tex]

The types of projection that are useful for making maps of the United States are called __________. (Choose 2)

Answers

Answer:

Mercator projection, geologic projection

what is the scientific notation of (41 e 23) (8.0 e 3)

Answers

Answer:b

Explanation:

What mass of glucose would you need (in g) to have 0.8 mol, given that the molar mass of glucose is 180 g mol-1?

Answers

Answer: 144 g

Explanation:

  Mass of glucose = moles × molar mass

∴ Mass of glucose = 0.8 mol × 180 g mol⁻¹

                               =  144 g

∴ the mass of glucose you need to have 0.8 mol of glucose = 144 g

helppppppppppppppppppppppppp

Answers

Answer:

lose 1 2+

Explanation:

I honestly don't know

8. Explain why fluorine has a smaller atomic radius than chlorine.

Answers

Answer:

Explanation: Fluorine has a smaller atomic radius than oxygen because fluorine has a larger nuclear charge. Fluorine has a smaller radius than chlorine because it has eight fewer electrons.

There are various kind of elements that are present in periodic table. Some elements are harmful,  some are noble gases. The size difference between chlorine and fluorine can be explained on the basis of number of shells.

What is periodic table?

Periodic table is a table in which we find elements with properties like metals, non metals, metalloids and radioactive element arranges in increasing atomic number.

As we go down along the periodic table the number of shells increases.

Atomic number of F= 9

Electronic configuration of F=2, 7

Atomic number of Cl= 17

Electronic configuration of chlorine = 2,8,7

So, there are total 2 shells in Fluorine while chlorine has 3 shells. The distance of shells increases with increase in number of shells. This makes the size of chlorine more bigger than fluorine.

Therefore, the size difference between chlorine and fluorine can be explained on the basis of number of shells.

Learn more about periodic table, here:

https://brainly.com/question/11155928

#SPJ2

Velocity has both speed and direction, so it is a what

Answers

Answer: Velocity is a mathematical vector. That means it has both a magnitude (speed) and a direction. Scientists need to consider an object’s velocity to calculate its momentum — its velocity multiplied by its mass. Scientists use measures of velocity in everything from figuring out how much rain is falling to sending a rocket to space.

Explanation: Hope this help:)

The trend towards smaller atomic radii as one moves to the right in a period is _____. A) faulty, as atomic radii in a period are nearly uniform in size. B) because of electron pair repulsion causing the expansion of the orbitals. C) wrong. Atomic radii increase across a period left to right as the larger d and p orbitals are occupied after the s orbital. D) due to the effective nuclear charge decreasing. E) due to the effective nuclear charge increasing.

Answers

Answer:

It’s E. Nuclear charge increasing

Explanation: it just is

There are various kind of elements that are present in periodic table. Some elements are harmful, some are radioactive, some are noble gases. Option E is correct option.

What is periodic table?

Periodic table is a table in which we find elements with properties like metals, non metals, metalloids and radioactive element arranges in increasing atomic number.

As we go from left to right in periodic table the atomic radii decreases because of increase in effective nuclear charge . There is no increase in number of shells only the number of electrons increases which increase the number of protons in the nucleus and hence the effective nuclear charge of the atom which makes the size of atom contract.

Therefore, the trend towards smaller atomic radii as one moves to the right in a period is due to the effective nuclear charge increasing. The correct option is option E.

Learn more about periodic table, here:

https://brainly.com/question/11155928

#SPJ2

Does someone know the combustion in a jacket potato???

Answers

Answer:

Some varieties of potato, such as Russet and King Edward, are more suitable for baking than others, owing to their size and consistency. Despite the popular misconception that potatoes are fattening, baked potatoes can be part of a healthy diet.[2]

BaCO3(s) → BaO(s) + CO2(g)

(a) A student heated a 10.0 g sample of barium carbonate until it was fully decomposed.

(i) Calculate the number of moles of barium carbonate the student used.

moles of barium carbonate =

Answers

number of moles = mass

molar mass

BaCO3 molar mass = 197.34 g/mol

mass = 10g

n = 10/197.34

n = 0.05moles.

The number of moles of barium carbonate used are 0.05moles.

If 12.2 kg of Al2O3(s), 57.4 kg of NaOH(l), and 57.4 kg of HF(g) react completely, how many kilograms of cryolite will be produced?

Answers

Answer:  kilograms of cryolite ≈ 50.23 kg

Explanation:

Write the balanced equation

Let's start off by writing the reaction for the formation of cryolite:

Al₂O₃  +  6NaOH  +  12HF    →    2Na₃AlF₆  +  9H₂O

Determine the limiting factor

moles = mass ÷ molar mass

moles of Al₂O₃ = 12200 g ÷ 101.96 g/mol = 119.65 mol

moles of NaOH = 57400 g ÷  39.997 g/mol = 1435.11 mol

moles of HF = 57400 g ÷ 20.01 g/mol = 2868.57 mol

Since Al₂O₃ has the smallest number of moles in the reaction, it is the limiting factor. As such we will have to use the moles of Al₂O₃ to determine the moles of cryolite that will be produced.

Find the mole ratio between the limiting factor and the cryolite

The mole ratio of Al₂O₃ : Na₃AlF₆ based on the balanced equation is 1 : 2

∴ since the moles of Al₂O₃ = 119.65 mol

        the moles of Na₃AlF₆ = 119.65 mol × 2 = 239.3 mol

Calculate the mass of the Cryolite

Mass cryolite = moles × molar mass

                      = 239.3 mol × 209.9 g/mol

                      =  50229.07 g

      ∴ kilograms of cryolite ≈ 50.23 kg

In a varve, summer is represented by _____.

sediment from melting glaciers being deposited in lakes

clay from wind-blown dust

ash from nearby volcanoes

None of these

Answers

Answer:

answer b

Explanation:

i took the test

Answer:

Hey let's talk here if you want

Can someone help please?

Copper occurs naturally as a mix of two isotopes: Copper-63 with a mass of 62.930 amu and copper-65 with a mass of 64.928 amu. The percent abundance of copper-63 is 69.09%.
Calculate the atomic mass of copper.

Answers

Take the weighted average of the individual isotopes.Explanation:63Cu has 69.2% abundance.65Cu has 30.8% abundance.So, the weighted average is 62.93×69.2% + 64.93×30.8% = 63.55 amu .If we look at the Periodic Table, copper metal (a mixture of isotopes but 63Cu and 65Cu predominate) has an approximate atomic mass of 63.55 g⋅mol−1 , so we know we are right.

Answer: 63.55

Explanation:

The attached chart shows the calculation.  The orange line points to the % abundance of Cu-65, which is the difference of 100% less the % Abundance of Cu-65 (since there are only 2 isotopes).

The weighted average contribution of each istope is calculated (blue arrow) and then summed to find the atomic mass of copper.

once an enzymatic reaction is completed, the enzyme releases what?

Answers

Answer:

Once an enzymatic reaction is completed, the enzyme releases substrates.

Explanation:

The enzyme will always return to its original state at the completion of the reaction. One of the important properties of enzymes is that they remain ultimately unchanged by the reactions they catalyze. After an enzyme is done catalyzing a reaction, it releases its products (substrates).

if the reactants of a reaction have an initial mass of 25g what should the mass of the products be

Answers

Answer:

It remains the same

Explanation:

The law of conservation of mass states that, during a chemical reaction, the total mass of the products must be equal to the total mass of the reactants.

Other Questions
How do the rooms of the house seem changed after the strangers visit This is balanced. True or false? Can someone plss help me with this !!!!QUESTION In what ways do the military practices described by Marco Polo reflect the influence of the steppe environment on the Mongols? Help me pls!!!!!Cmt now pls What force of attraction pulls everything towards Earth's center? This question as the simplest form pls helpppp Which situation has a result of 0? A) Tim walks 2.3 miles due east and turns around and walks 2.3 miles due west. How far did Tim walk?B) Mike is 7 years younger than his brother. In 7 years, what will be the age difference between Mike and his brother?C) Dion opens a checking account and deposits $24.75. He then withdraws $24.75. How much money is left in the checking account?D) Art is in a hot -air balloon 230 feet off the ground. The balloon climbs another 230 feet. How high off the ground is the hot-air balloon? identify each of other following statement if it is true or not put/ if is true and X if it's not if it is X underline the word or phrase that makes it wrong In the compound nitric oxide (NO), for every 14 grams of nitrogen (N),there are how many grams of oxygen (O)?a. 16b. 8C.14 A has two pennies; B has one. They match pennies until one of them has all three. Let X denote the number of trials required to end the game. (a) What is the density function of X? (b) Find the mean and variance of X. (c) What is the probability that B wins the game? Simplify each expression 1/2+(-1/4)=-10.28+ (-5.34)=-6/10 + 3/4=56.27+-13.16=4/5+3.5+12.4 [20 marks] You should spend about 25 minutes in this part. he message from your friend, Emily Hi, The school holidays are just around the corner. I really want to do some part- time job to earn some extra money. I'm thinking of finding work somewhere nearby or I could ask my parents for some allowance for helping out around the house. What should I do? Emily 223kilgrams to centigrams Noah enlarged a photograph by a scale factor of 6. Thehow many times as large as the area of the original? How would we know the gcf of 4xy+8x^2y-24x^4y^5 Choose the best asnwer The hospital building is divided________four sections. A.intoB.inC.aboutD.to Anthony borrows $6.50 from a friend to pay for a sandwich and drink at lunch,Then he borrows $3.75 from his sister to pay a library fine,Choose an equation to express Anthony's total debt that day.What is the answer. If it's correct I will give a heart, many points, 5 review stars, and brainliest ok. Don't remember how to do this. Please help! What is a scientist who studies weather called?astrologistmeteorologistweatherologistgeologist ankle sprain first add needed