Chemistry Middle School

HELP ITS DUE TOMORROW ​

HELP ITS DUE TOMORROW

Answers

Answer 1

Would’ve been easier to find this if u put the question on title

Answer 2

Answer:

1.  2 H2O + O2

2. NaBr + CaF2 = NaF + CaBr2

3.Ag + O2 = Ag2O

Explanation:

 I hope this helps~~~

Related Questions

Most cells have a(n) in the center of the nucleus which stores materials to make ribosomes.

Answers

Answer:

nucles membrane

Explanation:

brick

The answer should be nucleus

What was one was one important impact of Supreme Court's ruling in Bush v. Gore

What was one was one important impact of Supreme Court's ruling in Bush v. Gore

Answers

Answer: the answer is b or c

Explanation:

I took it

The answer is C, i took that test before and got it right

How to work out the relative mass of potassium? What is the calculation? ( explained very easily )

Answers

Answer:

39

Explanation:

Relative mass does not need to be calculated as it is listed on the periodic table. Potassium's relative atomic mass is around 39.

Relative Atomic Mass = Mass of one atom
———————————
(1/12)th Mass of one C12 atom

Explain why stomach acid must be neutralized after it leaves the stomach.

Answers

Proper digestion in the stomach can only happen within a narrow pH range, and when we neutralize stomach acid, the domino effect is thrown off. Without adequate gastric acid, many vitamins, minerals, proteins, and amino acids cannot be absorbed.
That kay person is right I learned it in class and my teacher even said the same thing.

When the speed of the bottle is 2 m/s, the KE is kg m2/s2. When the speed of the bottle is 3 m/s, the KE is kg m2/s2. When the speed of the bottle is 4 m/s, the KE is kg m2/s2. When the speed of the bottle is 5 m/s, the KE is kg m2/s2. When the speed of the bottle is 6 m/s, the KE is kg m2/s2.
instructions
In this part of the experiment, you will be changing the speed of the bottle by dropping it from different heights. You will use the same mass, 0.250 kg, for each trial, so record this mass in Table B for each velocity. Then, calculate the expected kinetic energy (KE) at each velocity. Use the formula KE = mv2,
where m is the mass and v is the speed. Record your calculations in Table B of your Student Guide.

Answers

Answer:

Based on the given instructions, you need to calculate the expected kinetic energy (KE) at each velocity using the formula KE = mv^2, where m is the mass and v is the speed. The mass is given as 0.250 kg.

Table B: Calculation of Kinetic Energy (KE)

Table B: Calculation of Kinetic Energy (KE)

Speed (m/s)Mass (kg)KE (kg m^2/s^2)20.2500.50030.2500.75040.2501.00050.2501.25060.2501.500

To calculate the kinetic energy at each velocity, multiply the mass (0.250 kg) by the square of the velocity.

For example, when the speed of the bottle is 2 m/s: KE = (0.250 kg) * (2 m/s)^2 = 0.250 kg * 4 m^2/s^2 = 1.000 kg m^2/s^2

Perform similar calculations for the other velocities and record the results in Table B.

Answer:

Explanation:mass of the bottle in each case is M = 0.250 kg

now as per given speeds we can use the formula of kinetic energy to find it

1) when speed is 2 m/s

kinetic energy is given as

2) when speed is 3 m/s

kinetic energy is given as

3) when speed is 4 m/s

kinetic energy is given as

4) when speed is 5 m/s

kinetic energy is given as

5) when speed is 6 m/s

kinetic energy is given as

Choose the word in the sentence below that functions as the indirect object.


Sandy made dad a cake for his birthday.

plz help


no bots or ill report


30 points!!!!!!!!!!!!!!!!!!!!!

best answer gets brainlest

Answers

I believe it’s cake but. Sorry if u got it wrong

Answer:

cake

Explanation:

Explain why the change you made caused the stingwing population to decrease. Use energy storage molecules to explain your answer.

Answers

Answer:

Reprduce

Explanation:

ANSWER-

The decrease in the stingwing population was caused by the change in energy storage molecules. Stingwings rely on energy storage molecules, such as glycogen and fats, to fuel their activities and survival. If the change disrupted their ability to store and utilize these molecules, their energy levels would decrease, leading to decreased population size.

Which of the following problems would be a direct result of humans building along the ocean shore zone?


A. the erosion of the sand and soil from the shoreline


B. sand dunes and vegetation being disturbed


C. the movement of sand from one place to another


D. sand being washed away over long periods

Answers

Answer:

I think it is B.

Explanation:

The erosion of the sand and soil from the shoreline would be a direct result of humans building along the ocean shore zone. When humans build structures along the shoreline. This can lead to increased erosion of the shoreline and loss of the beach.

Building along the ocean shore zone can have several impacts on the natural environment. One of the direct impacts is the erosion of the sand and soil from the shoreline. This occurs because construction can disrupt the natural processes that maintain the beach, such as the movement of sand and the protection provided by vegetation.

For example, building seawalls or other structures can prevent the natural movement of sand and sediment along the beach. This can lead to erosion of the shoreline, as the sand is no longer able to accumulate in areas where it is needed to protect the shoreline. These plants help to hold the sand in place and protect the beach from erosion.

To learn more about erosion please visit-
https://brainly.com/question/30587260
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What type of person studies and collects data on the weather?

Answers

The answer would be a Meteorologist
Meteorologist is a person who studies and collects data

PLEASE HELP QUICKLY!!!

PLEASE HELP QUICKLY!!!

Answers

Answer:

D

Explanation:

I think it is D please give me a Brainly

I NEED HELP ASAP!!!
A sample of ice undergoes a physical change by being melted in a beaker. The ice cube had a mass of 30 grams. What will be the mass of the liquid water? How did you determine this?

Answers

Answer:

it would still be 30 grams.

Explanation:

it would still be 30 grams because you are not adding any more water to the beaker and you are not taking any of the melted water away

What is the charge on the Cr in Cr2O72-

Answers

Answer:

+6.

Explanation:

So, a chromium atom here has an oxidation number of +6.

In the dichromate ion, the oxidation number of chromium is+6. The sum of the oxidation numbers in Cr2O72-, a polyatomic ion, is -2, the charge of the ion.

Answer asap in your own words!
What did Sir Isaac Newton conclude about color from his experiment with prisms?

Answers

Answer:Newton's crucial experiment was to refract light onto a piece of wood, into which had been drilled a small hole. In this way, he was able to obtain a beam of light with a pure color. He was able to show that blue light, for instance, when refracted through a second prism yielded again only blue light.

Explanation:

Answer:

Answer:Newton's crucial experiment was to refract light onto a piece of wood, into which had been drilled a small hole.

Explanation:

If a substance has a density of 19 g/cm3, then what is the mass of 8 cm3 of this substance?

Answers

The mass is 2.375 grams
The mass is 3.375 grams

Many of these microscopic organisms are _____, or unicellular.

many-celled

one-celled

dual-celled

triple-celled

Answers

many of these microscopic organisms are one-celled, or unicellular

is copper a renewable resource? explain your reasoning

Answers

Yes copper is a renewable resource because it is the of the few materials that can be recycled/ reused.
Yes because cooper can be recycled

help me fill this page with the right answer please (17 lines minimum please)

help me fill this page with the right answer please (17 lines minimum please)

Answers

I am water moleculeI have to first bear the heat of sun .Then the heat evaporates me into vapours I am send to the atmosphere with my brothersThen I have to form clouds Then precipitation or density of our brothers increasesWe keep increasingThen once a time comes when we are full We then condensed down to earthWe comes back in the form of rainThen either we are stored in some place or undergroundThen people collects us from different places like pond,river etc
Hey Lenny lately I’ve been having a rough time in the water cycle. It all started when I was chilling in my favorite location the “glaciars” and suddenly the sun turned me into liquid form. Next thing I know I am hurdling down a river straight into a massive lake. Personally this is my least favorite stage of the water cycle because of kids and bacteria that lurk in the water, very scary things. I didn’t stop at the lake very long, and instead sunk into the soil in a process called collection so I could become ground water. Underground reservoir’s are much more peaceful then lakes and I wanted to stay there. However I was forced up a water well pump shortly after and sent through a long tube. Me and couple of the friends I met on the way were all dispersed over a giant grass feild. Many molecules in the group were captured by the hostile plants but I escaped through the means of evaporation. Currently I have condensed into cloud form and I am roaming the skies looking for you, when you get this let me know and I’ll percipitate in your area! P.s I found this photo of us freezing over in the ice age lollll.
help me fill this page with the right answer please (17 lines minimum please)

On the periodic table, elements become more metallic as you move from left to right across a row, and top to bottom down a column.

True

False

Which groups/families are known to have low melting points?

Transition Metals

Alkaline Earth Metals

Halogens

Alkali Metals

Nobel Gases
Scale is defined as how big something is

True

False
How many chlorine atoms are in one molecule of NaCl?

A. 1

B. 0

C. 2

D. Molecules don't have atoms

Answers

Answer:

true, false, 0

Explanation:

Answer:

1. False: metallic character decreases as you move from left to right.

2. Nobel gas is your best bet since Helium has the lowest melting point.

3. False: scale can refer to small or large.

4. 1 chlorine atom

Someone please help me if right I’ll give you 5$

Someone please help me if right Ill give you 5$

Answers

Answer:DId you even read it you have to that in your lab class and  says you need other information aint no way i can answer that

Explanation:

The answer above is correct just pass it

Which example is most likely made from both metals and gemstones?

necklace
soda can
window frame
kitchen utensil

Answers

The answer is A necklace there is no other answer that would make any sense

What determines an element's emission spectrum?
O A. The size of the sample
O B. The mass of the nucleus
O C. The electron energy levels
O D. The number of protons

Answers

c the electron energy levels

An elements's emission spectrum determines the electron energy levels and the correct option is option C.

An element's emission spectrum is determined by the specific energy levels of its electrons. When an electron in an atom transitions from a higher energy level to a lower energy level, it releases energy in the form of electromagnetic radiation.

The wavelength and frequency of this emitted light correspond to specific energy differences between the electron energy levels. Each element has a unique arrangement of electron energy levels, leading to a distinct emission spectrum.

By analyzing the emitted light, scientists can identify the element and gain insights into its atomic structure. The size of the sample, mass of the nucleus, and number of protons do not directly determine an element's emission spectrum.

Thus, the ideal selection is option C.

Learn more about Emission spectrum, here:

https://brainly.com/question/31086638

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Complete each statement with the word that makes it true. The noble gases are the least of any elements on the periodic table. The form acidic compounds with hydrogen. The halogens are the most reactive among all the

Answers

Awnser                  1.reactive

2.halogens

3.nonmetals                                                                                                                                                                                                                                                                             Explanation:

1 reactive
2 halogens
3 non metals

Write the roman numeral atomic name from the chemical formula.​

Write the roman numeral atomic name from the chemical formula.

Answers

The chemical formula VI3 is composed of an unknown element with the symbol "V" and three atoms of iodine. It is not a common compound, as there is no element with the symbol "V". Therefore, it is not possible to write the Roman numeral atomic name from this formula.

The chemical formula SnO2 represents tin(IV) oxide, which is composed of one tin atom and two oxygen atoms. To write the Roman numeral atomic name from this formula, we can follow these steps:

Sn: tin

O: oxygen

The oxidation state of Sn is +4, and the oxidation state of O is -2.

To determine the Roman numeral atomic name, we need to find the charge on the cation (Sn) that balances the charge on the anion (O). Since the charge on two O atoms is -4, the charge on Sn must be +4 to balance the charge.

The Roman numeral for +4 is IV.

Therefore, the Roman numeral atomic name for SnO2 is tin(IV) oxide.

Answer:

atomic name snO2 = Tin (IV) oxide

Explanation:

What kind of rocks would you expect to see on Mars? What evidence supports your response?

Answers

Mars' surface is largely covered with basalt, a volcanic rock covering much of Earth's surface as well. Earth has large amounts of granite in its crust, which Mars appears to lack.
Based on the composition of the martian meteorites and the presence of plains and mountains that look like features produced by basaltic volcanism on Earth, geologists expected to find primarily basalts on Mars.

I need the correct answer

I need the correct answer

Answers

Answer:

d.

Explanation:

They can be spread through contaminated surfaces.

Answer:

d

Explanation:  pathogens csnnot be spread be sontaminated surfesec

I need help ASAP! 10 points!

I need help ASAP! 10 points!

Answers

Answer:

The answer to this question is ( a )

Explanation:

ionic: transfer of electrons covalent: sharing of electrons

1. Using D10W and a vial of NaCl 4 mEq/mL, how many mL of NaCl are needed to prepare 250 mL of a
D10/NS solution?
a. 4.8mL
b. 9.6ml
c. 19.6mL
d. 154mL

Answers

To prepare 250 mL of a D10/NS solution using D10W and a vial of NaCl 4 mEq/mL, you would need 9.6 mL of NaCl. Normal saline (NS) contains 154 mEq/L of sodium chloride (NaCl). To prepare 250 mL of NS, you would need 250 mL * (154 mEq/L) = 38500 mEq of NaCl. Since the vial of NaCl contains 4 mEq/mL, you would need 38500 mEq / (4 mEq/mL) = 9625 mL = 9.6 mL of NaCl. So the correct answer is b. 9.6ml.

the correct answer is A 4.8 mL

Help fill in the blanks this is for 8th-grade science btw.

Help fill in the blanks this is for 8th-grade science btw.

Answers

Answer:

i know that 10 x is .22300

I know that 10x is .22300

I just need help all I need is the answer please some one

I just need help all I need is the answer please some one

Answers

Answer: The correct fill-in-the-blank answers are:

1. through binary fission (already filled in)

2. be resistant to penicillin

3. through asexual reproduction.

4. cell replicates before

5. a simpler process

Explanation:

The correct fill-in-the-blank answers are:

1. Bacteria reproduce through binary fission (already filled in)

2. A parent bacterial cell is able to survive in the presence of antibiotic penicillin. Subsequent generations from this parent will be resistant to penicillin

3. Something that potatoes and bacteria have in common is that they both reproduce through asexual reproduction.

4. In asexual reproduction DNA from the parent cell replicates before it produces daughter cells.

5. Asexual reproduction is a simpler process than sexual reproduction.

Know more about Bacteria: https://brainly.com/question/6941760

Many systems and technologies have been designed to communicate over long distances. They all send information that has been encoded into a signal. What must a receiver be able to do to understand a signal that is being sent to them?

Answers

The person above me is a very good person hope this helps.
Other Questions
need help not sure the constitution was to be considered ratified as soon as it had been approved by nine of the states is...... An accounting information system should be designed to provide information that is useful. To be useful the information must be: Select one: a. relevant, accurate, and timely. b. qualitative rather than quantitative. c. marginal between two alternatives. d. unique and unavailable through other sources. e. historical in nature and not purport to predict the future. What does it mean to live, to feel exposed to the madnessof the vast, eternal sky. A shipment of dangerous goods that is called "excepted quantities" is one that involves: O any non-traditional quantity of the goods O an unusual quantity of the goods. For example goods that are shipped in plastic gallon jugs when they are normally shipped in one-liter glass bottles. O a very large quantity of the goods, shipped in bulk (vessel size) O a quantity of the goods that the carrier is not accustomed to handling O a very small quantity of the goods A portion of the periodic table of elements is reproduced here. Based on theirrelative positions, what conclusion can be drawn about these metallic elements?A All the elements have the same reactivity. B Potassium is much more reactive than iron. C Chromium is twice as reactive as vanadium. D Calcium is much less reactive than scandium. What role did Themistocles play during the Greco-Persian Wars?He led the Athenian navy at the Battle of Salamis.He recorded the story of the Greco-Persian Wars.He led the Persian invasion of the island of Marathon.He defended a mountain pass against the Persian army. A coil of wire (22.924 cm2 area) can generate a voltagedifference when rotated in a magnetic field. If a 501 turn coil isrotated at 81 Hz in a B field of 0.031 T, what is the voltagecreated ? You construct a portfolio containing two stocks, X and Y. You invest 50% of your funds in Stock X and the remainder in Stock Y. Stock X has an expected return of 7.6% and has a standard deviation of 14%. Stock Y has an expected return of 14.6% and has a standard deviation of 19%. The correlation between the two stocks is 0.7. What is the expected return on the portfolio? a. 11.50% b. 10.50% c. 11.10% d. 10.90% Given the below Oz program, what it will display when run? Explain why. Discuss the result of running the same program after switching Delay 10000} by Y-5*5. Does the program display the same result? declare X (Browse X) local Y in thread Delay 10000) Y-5*5 {Browse YI end X-Y 12 12 end Jericho, one of the world's oldest villages, began an impressive building program of structures to protect their grain surplus around:________ How much would you need to deposit in an account now in order to have $5000 in the account in 15 years What will you do in the following circumstances? Use your intuitive thinking in answering.1.Turning community from GCQ to MECQ.2.Cell phone is suddenly lost3.Strong typhoon4.Low grades5.Witness a crime6.Involvement in a brawl 7. Engage in a motorcycle accident 8. Friends staying away from you9. Heart broken10. Experienced depression Analyze the reflectional symmetry of the polygons labeled A, B, C, and D. ABD. Which polygons have fewer than two lines of symmetry?A and BBand CA and CC and D 5. How does the characterization of theOysters contribute to the poem's theme? "Computed on the basis of sales dollars. Since the start of development work on the Wireless Wizard, advances in technology have altered the market somewhat, and management now believes that the company can introduce only one of the two models. Consultants confirmed this fact not too long ago, with Johnson and Gomez paying $35,200 for an in-depth market study. Sales salaries (excluding commission) will be $89,000 no matter which product is sold. The marketing and advertising costs indicated for each product are incurred only if that product is sold. Other fixed overhead is expected to be the same, regardless of which product is introduced. Problem 14-46 Part 3 -a. Prepare a financial analysis and determine which of the two models should be troduced. -b. The company would be advised to select the Enhanced model or Basic model. 3-a. Prepare a financial analysis and determine which of the two models should be introduced. 3-b. The company would be advised to select the Enhanced model or Basic model. What ethical issues might an audio engineer face? 15. What do you think is the greatest threat to the future ofpollution, orthe world-war, disease, overpopulation,something else? Explain your choice. The document ____ controls the variety of fonts, colors, and other visual effects available for formatting a document. Why does the narrator run away from Doodle during the storm at the end of "The Scarlet Ibis"?OA He wants to punish Doodle for failing.OB He realizes that Doodle "lies" better than he does.OC He knows that Doodle is about to die.OD He wants to encourage Doodle to run faster.