SUPPER EASY WILL GIVE BRAINLIEST NEED HELP ASAP


7. Which
pocess is an example of a chemical
change?

A. Salt mixes with water and
dissolves.

B. An aspirin tablet is crushed into a fine
powder.

C. Water droplets form on the outside of a
cold drink glass.

D. An antacid tablet is added to water and
bubbles are produced.

Answers

Answer 1

Answer:

Your answer will be (D).

Hope this helps!

Answer 2

Answer:

D

Explanation:

You can tell when a chemical change occurs if a gas is produced (bubbles), an odor is produced, if there is a color change, or if the surroundings get hotter or colder.


Related Questions

Which scientific law describes the observation that energy cannot be created or destroyed?

Law of universal gravitation
Law of conservation of energy
Newton's first law of motion
Newton's third law of motion

Answers

Answer:

law of conservation of energy

How many total atoms of Nitrogen are shown in the formula below?
formula in question: 4N20

awnsers for problem
A.2
B.4
C.6
D.8

includes photo
Giveing 50 brainlys to the right awnser

Answers

The number of atoms of nitrogen in 4N₂O is 8 atoms.

Atom are the basic or fundamental units of matter that defines its structure.

The atom housed the proton, neutron and electron. The atoms of nitrogen in 4 moles of the Nitrogen oxide is the number of each nitrogen present in it .

Therefore,

4N₂O → Number of atoms of Nitrogen will be 4 × 2 = 8 atoms.

Therefore, the number of atoms of nitrogen in the compound 4N₂O is 8.

read more: https://brainly.com/question/18777500?referrer=searchResults

Observe the superscript of N

It's 2

Means

There is 2 atoms of N in 1 molecule of Nitric oxide

Now as there is 4 multiplied

Total atoms=4(2)=8

identify each of the following changes of states as melting ,freezing,sublimation or deposition
a: ice sculpture start breaking down as temperature rise above 0 degree​

Answers

Answer:

Melting

Explanation:

Ice begins to melt at 0 degrees celsius

Melting is from solid to liquid

Freezing is from liquid to solid

Sublimation is from solid to gas

Deposition is from gas to solid

How do the ecological pyramid shapes compare

Answers

Answer:

it allow us to compare the amount of energy passing through each tropical level over a period of time

Consider the unbalanced chemical equation:
H2SO4 (aq) + Fe(OH)3 (S) → Fe2(SO4)3 (S) + H2O (L)
A volume of 38.0 mL of aqueous H2SO4 solution was required to
react completely with 0.685 g Fe(OH)3 (molar mass = 106.8 g/mol)
to produce Fe2(SO4)3. Calculate the molar concentration of the
H2SO4 solution.
A) 0.253 M
B) 0.344 M
C) 0.214 M
D) 0.301 M
E) 0.175 M

Answers

The answer is A. The explanation is in the image.

On the top of the image where it just says equation:, that is part of the sentence "First we need to balance the equation:"

NEED ANSWER ASAP!! will give brainlist

Which best explains why nanofiltration is an important new technology?

A. It can be used to help regions that have a short supply of usable water.
B. It can be used as an energy source to produce electricity in regions with limited coal.
C. It recycles wastewater to be reused for geothermal energy.
D. It collects solar energy to generate electrical power.

Answers

Explanation:

Our Direct Nanofiltration (dNF) membranes offer the unique combination of a low fouling hollow fiber configuration with the ability to remove organics and salinity (hardness) from water in one simple step. Other than a strainer, no further pre-treatment is required. We manufacture our membranes with a patented layer-by-layer process, where multiple nano-scale layers are deposited on a membrane support. This method enables very precise and controlled rejection and flux properties of the membrane. A unique solution for troubled water.

HELP
How can you tell if mass is being conserved

Answers

I can help say like gas is steaming from a pot like you cooking on the gas is being conserved after it evaporates and liquid if you drink water it’s going into your body so it’s being conserved and solid said like i have a brick and you throw it and it breaks it had been conserved because it’s broken

Which of the above reactions is NOT an oxidation-reduction (redox) reaction?


A.First (blue)

B.Third (white)

C.Fourth (purple)

D.Fifth (pink)

E.Second (red)

Answers

Explanation:

I think third(white) isn't a redox reaction

A student performs titration to find the concentration of acetic acid. Titrant was sodium hydroxide. He went beyond the indicator color change by adding too much titrant. How will his experimental error affect the calculated value for the concentration of unknown acetic acid

Answers

Answer:

A student performed titration to find the concentration of acetic acid. Titrant was sodium hydroxide. He went beyond the indicator color change by adding too much titrant.

Explanation:

hope it helps you

Identify three ways you could increase the rate of an aspirin tablet dissolving in a glass of water.

Answers

Answer:

If you are trying to dissolve a substance, you have three primary avenues to increase the dissolution rate: decreasing the particle size of the solid, increasing the temperature and/or increasing the mixing or stirring rate.

Explanation:

If 48 grams of carbon are burned in the presence of 128 grams of oxygen, the amount of carbon dioxide that forms will be ______.

A. 48 grams
B. 128 grams
C. 176 grams
D. 224 grams

Answers

Answer:

C. 176 grams

Explanation:

48g / (12g/mol) = 4.0mol. Moles of Oxygen used. = 128g / (32g/mol) = 4.0mol. C + O2 => CO2. Therefore ...

C. 176 grams of carbon dioxide

Elements that form diatomic molecules include
a oxygen
b hydrogen
C sodium
d two of the above

Answers

Answer:

D, two of the above, oxygen and hydrogen.

Explanation:

To solve this problem we can either use orbital stuff or common knowledge. Oxygen and hydrogen are known to form O2 and H2, while sodium forms metallic bonds between the atoms.

What is the mass of sulphate ions 96.06 in 25.0ml of a 0.125 solution

Answers

Answer:

12.34

Explanation:

because this is how we do this

What other inventions came because of the microscope? (These are inventions that are related to the microscope in some way.)

Answers

Answer:

Explanation:Leeuwenhoek observed animal and plant tissue, human sperm and blood cells, minerals, fossils, and many other things that had never been seen before on a microscopic scale. He presented his findings to the Royal Society in London, where Robert Hooke was also making remarkable discoveries with a microscope.

I need this done soon!
What is a saturated solution?

A. A solution with as much dissolved solute as it can hold at a given temperature.
B. A heated solution with more dissolved solute can hold at a lower temperature.
C. A solution that holds less dissolved solute than is possible at a given temperature.
D. A solution that holds as much solvent as possible at all temperatures.

Answers

Answer: A

Explanation:

A saturated solution is a chemical solution that contains the highest bound solvent level. In a saturated solution, the extra solution will not dissolve. Depending on a multitude of variables, the quantity of fluid that can we can add in a solvent to create a saturated solution.

Usain Bolt went from 0.0 to
11.0m/s in 3.4s. What was his
acceleration?

Answers

Answer:

Answer: Change in speed = 11 m/sTime taken = 3.4sHence, acceleration = (11/3.4) m/s² = 3.235 m/s²

Explanation:

(winks and runs off)

Acceleration is 3.235 m/s² when Usain Bolt went from 0.0 to 11.0 m/s in 3.4 seconds.

What is acceleration?

Acceleration is defined as a rate at which the velocity changes with time with respect to both speed and direction.An object is said to be accelerated if it's speeds up r slows down.

Motion along a circle is always accelerated even when speed is constant it's direction is continuously changing.Acceleration is a vector quantity as it has both magnitude as well as direction.The magnitude of acceleration is described by Newton's second law of motion.

Formula of acceleration is change in speed /time.Substituting the given values in the given formula,(11.0-0.0)/3.4=3.235 m/s².

Thus, the acceleration  is 3.235 m/s² when Usain Bolt went from 0.0 to 11.0 m/s in 3.4 seconds.

Learn more about acceleration,here:

https://brainly.com/question/12550364

#SPJ2

Why do some hockey players go flying when they are checked?​

Answers

Be a they are dramatic

If an HPLC procedure is running at a pressure of 5.48×10^8 Pa what is it’s running pressure in torr

Answers

4.11x10^6 torr , 1 pa=0.0075 torr

Can someone tell me how to calculate the percentage of purity of a sample in a compound and the percentage of the compound in the sample​

Answers

Answer:

Percentage purity of a substance can be calculated by dividing the mass of the pure chemical by the total mass of the sample, and then multiplying this number by 100.

Explanation:

mark me as brainlist

two reactants are placed into a flask a single displacement reaction occurs, with general reaction of scheme of:

Answers

Given that a single-displacement reaction occurred between two (2) reactants which were placed into a flask,  the potential identities of A, B, and X are: D. A = Mg, B = O, X = Cl.

A single-displacement reaction is also referred to as a single-replacement reaction and it can be defined as a type of chemical reaction wherein a single (one) chemical element of the reacting chemical compound is displaced (replaced) by a similar chemical element.

This ultimately implies that, a single-displacement reaction typically involves a single element displacing another chemical element within a chemical compound.

Note: A potential identity reveals the chemical symbol or name of a chemical element in a particular chemical reaction.

Given the following general reaction of scheme of:

                                     [tex]2AB+2X_2\rightarrow 2AX_2+B_2[/tex]

We would proceed to replace the variables with chemical elements as follows:

                                    [tex]2MgO+2Cl_2\rightarrow 2MgCl_2+O_2[/tex]

Therefore, the potential identities of A, B, and X are:

[tex]A = Mg\\\\B = O\\\\X = Cl[/tex]

Read more: https://brainly.com/question/25670663

PS: Your question is lacking the necessary information, but I have provided them in the image attached.

Suppose you are performing a precipitation titration to study the K sp of zinc(II) iodate, Z n ( I O 3 ) 2 . The literature value of K sp is 3.9 × 10 − 6 . If you use 0.200 M K I O 3 as the titrant, what concentration of I O 3 − (in M) do you predict will be needed to start precipitation in a 0.229 M solution of Z n ( N O 3 ) 2 ?

Answers

The predicted concentration of IO₃⁻ needed to start the precipitation titration is 1.703 × 10⁻⁷ M

The dissociation of zinc (II) iodate can be expressed as:

[tex]\mathbf{Zn (IO_3)_2 \to Zn^{2+} + 2IO_3^-}[/tex]

Given that the solubility product constant Ksp value = 3.9 × 10⁻⁶

For the above dissociation,

[tex]\mathbf{Ksp = [Zn^{2+ }] [IO_3^-]^2}[/tex]

Since [tex]\mathbf{ [Zn^{2+ }] = [Zn(NO_3)_2] = 0.229 \ M}[/tex]

[tex]\mathbf{3.9\times 10^{-8} =(0.229) \times [IO_3^-]^2}[/tex]

[tex]\mathbf{ [IO_3^-]^2 = \dfrac{3.9\times 10^{-8} }{(0.229)}}[/tex]

[tex]\mathbf{ [IO_3^-]^2 = 1.703 \times 10^{-7} \ M}[/tex]

Therefore, we can conclude that the initial predicted concentration of IO₃⁻ needed to start the precipitation titration is 1.703 × 10⁻⁷ M

Learn more about solubility product constant here:

https://brainly.com/question/17274813?referrer=searchResults

14. What type of materials are spun together to make yarns?

Answers

Answer:

cotton

Explanation:

which is typically spun into fine yarn for mechanical weaving or knitting into cloth.

please answer, the question is attached below/above

Answers

Answer: No

Explanation: O is a recessive trait so at least there is a mutation, then no.

Explain how signals are processed and stored by the brain.

Answers

[tex] \: \: \: \: [/tex]

Neurons communicate with each other by sending chemical and electrical signals. Each neuron is connected with other neurons across tiny junctions called “synapses”. Impulses rush along tiny fibres, like electrical wires, from one neuron to the next. Electrical impulses travel through neurons

hope it helps

[tex] \: \: \: \: \: \: \: [/tex]

An atom contains 32 protons and 48 neutrons.
(a) What is its atomic number?
(b) How many electrons does it have?
(c) What is the mass of the atom?

Answers

Answer:

The answer to these are:

(A) 32

(B) If it is balanced 32

(C) 80

Explanation:

Photosynthesis is an endothermic chemical reaction that forms sugars from carbon
dioxide, water, and the sun's energy. Which of the following must be true of
photosynthesis?

The reaction can take place only if energy is added.

The reactants are oxidized.

The photosynthesis reaction produces ions.

The molecular bonds in carbon dioxide are very weak.

Answers

Answer:

The reaction can take place only if energy is added.

Determine the amount in grams of KCl that exists in 20.3 g of a solution that contains 1.14 % KCl by mass 1.14 g KCl

Answers

The mass of KCl that exists in 20.3 g of solution containing 1.14% by mass of KCl is 0.23 g

From the question given above, the following data were obtained:

Mass of solution = 20.3 g

Percentage of KCl = 1.14% = 1.14 / 100 = 0.0114

Mass of KCl =?

[tex]Percentage = \frac{mass of solute}{mass of solution} * 100\\\\0.0114 = \frac{mass of KCl}{20.3} \\\\[/tex]

Cross multiply

Mass of KCl = 0.0114 × 20.3

Mass of KCl = 0.23 g

Therefore, the mass of KCl in the solution is 0.23 g

Learn more: https://brainly.com/question/14876861

Ana was setting up a circuit to make a buzzer buzz. She didn’t have any wires, so she needed to find
something that had the same properties as wires. Which of the following would work for Ana’s circuit?
A. A steel knife
B. A wood chopstick
C. A plastic straw
D. A glass tube

Answers

Answer:

should be a or d, though im leaning towards d more. sadly can't narrow it down 100%. b nor c are correct since they are made out of wood and plastic which cannot allow electricity to pass by. copper and metal are effective conductors of electricity, which a steel knife and a glass tube is made out of.

need help with this pleaseeeee

Answers

Answer:

1) 1, 1

3)1, 1

4) 1, 2

5) 2, 1

6) 1, 5

7) 2, 5

HELP QUICK carbon dioxide makes up less than 1 percent of earths atmosphere, and oxygen makes about about 20 % These percentages are maintained most directly by what

Answers

Answer:

respiration and photosynthesis

Explanation:

The percentages of carbon dioxide and oxygen in Earth's atmosphere are maintained most directly by cellular respiration and photosynthesis.

What is photosynthesis?

Photosynthesis simply refers to a biological and chemical process through which green plants convert light energy derived from the Sun into chemical energy, so as to make their food while using carbon dioxide (CO₂) and releasing oxygen.

On the other hand, cellular respiration is a series of metabolic reactions that occur in living cells and it involves the use of oxygen that are typically produced by green plants (autotrophs) during photosynthesis.

This ultimately implies that, the percentages of carbon dioxide (1%) and oxygen (20%) that are contained in Earth's atmosphere are maintained most directly by cellular respiration and photosynthesis.

Read more on photosynthesis here: brainly.com/question/3529377

Other Questions
SIMPLIFY THESE!! I WILL MARK U BRAINLIEST!! -10-11x+24=3x how can i solve this type of thing and i need to solve for x Who can answer this question? ( I will ask questions every Thursday!! 3.1.10 Project:Complete yourAssignmentEnglish 9 Sem 1 NameDaProjectYour ASSIGNMENTCreate a presentation that illustrates some of the important themes and metaphorsfrom one of the poems in the lesson in your presentation, make a single overall pointabout the poem and back it up with images you find online that illustrate specificparts of the poemYour images should be appropriate to the themes and metaphors you'redemonstrating. They should also be presented in a way that's easy for the audienceto understand. Make yourself clear through the visual layout of your presentation andthrough written explanations. Finally, organize your presentation using an outline,Your presentation should include the following elements: A main point about the themes and metaphors in one of the poems from thelesson At least four images that support your main point by illustrating some part of thepoem A written explanation to accompany each image An outline to organize your presentationplease helppppppp ASAP !! Dan bought 1/8 of a pound of iellybeans and 7/8pound Of gummy bears. How much candy did he buy? PLS HELP ASAP ILL GIVE BRAINLKEST THANKS ella ______ en el colegio What is the product of the square of 3 and cube of 5? which u.s. president earned the nickname ""the last cocked hat""? change the sentences that direct and indirect speech he said I am waiting for you Does it appear that true average HAZ depth is larger for the high current condition than for the nonhigh current condition Lines r and s are perpendicular and intersect at point k ray kt is drawn forming angles 1 and 2 if angle 1 is 4x-12 and angle 2 equals 3x -8 what is angle 1 to nearest 10th If it takes you 2 1/2 hours to assemble one unit, how many units will you complete in 15 hours? (Change 2 1/2 to improper fraction first) Have a good day and remember to smile! Altamira & Lascaux CavesDiscuss anything in the caves or about the caves that surprised or especially interested you. Memory of your familiar old e-mail password may block the recall of your new password. This illustrates please i will give 50 points and mark brainly please help sson in which mission did the us first land a man on the moon? 5(4 - 1) The Second person to answer gets Brainliest 1. Which of the following is a commonality found in the ancient art of different societies? (1 pointArtists were generally highly elevated in the status of the society.Architecture was limited to houses.Animals were often depicted in ancient art.all of the above