Chemistry High School

PLZ HELP ME!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Answers

Answer 1

Answer:

Reactivity

Explanation:

Luster. Ductile, and Malleabillity are all physical.

Related Questions

Analyzing a blood sample usually involves which type of separation method?
screening
distillation
centrifugation
filtration

Answers

The answer would be Centrifugation! How this helps!

Answer:

the answer is b

Explanation:

i just did quizz

Select the correct answer

Which statement best supports the idea that water conservation is important for human societies?

OA Once humans use water, it cannot be reused ever again,

OB. Only about 1% of the freshwater on Earth is easily accessible.

OC Water is constantly being lost from the hydrosphere

OD. Most land animals use salt water instead of freshwater.

Answers

Answer:

Only about 1% of the freshwater on Earth is easily accessible.

Explanation:

Freshwater accounts for a minimal proportion of water resources on planet earth. About 70 percent of the world surface area is covered by water, but only about 2.5 percent of this mass of water is fresh. The remaining are marine or salt water. Amazingly, just about 1 percent of this freshwater is easily accessible. The other 1.5% is trapped in glaciers and snowfields.

This underscore the need for water conservation on the planet since fresh water is a scarce resource and people living in many areas have no access to fresh water.

The temperature at which a substance in its solid state melts into the same substance in a liquid is known as

Answers

Answer:

0 C

Explanation:

A sound wave has a frequency of 20 Hz and a wavelength of 100 m. What is speed of the wave

Answers

The speed of a wave can be calculated using this formula:

v = f x λ

Where:

v is the wave speed in metres per second, m/s

f is the frequency in hertz, Hz

λ (lambda) is the wavelength in metres, m

Calculation:

Given:

f = 20 Hz

λ = 100m

Using the equation:

v = f x λ

v = 20 x 100

v = 2000 m/s

Therfore, the speed of the wave is 2000 m/s

A sound wave has a wavelength of 100 m and a frequency of 20 Hz. The wave's speed is 2× 10^3 m/s.

assuming frequency = 20 Hz and wavelength = 100 m

utilized concept: v= = 20×100 = 2×10³ m/s

Why is frequency important?

The frequency in physics is the quantity of waves passing a fixed location in a unit of time. It also indicates how many cycles or vibrations a body in periodic motion experiences in a given unit of time.

How would you define sound?

A sort of energy created by vibrations is sound. The molecules of the air surrounding an item vibrate as a result.. These molecules vibrate because they collide with nearby molecules, which also vibrate as a result.

To know more about Frequency, visit-

https://brainly.com/question/14316711

#SPJ2

Which is the best way to determine if an object is made of pure silver?
O Determine the solubility of the object.
O Test to see if the object is chemically reactive.
Determine the density of the object and compare the known density of pure silver.
O Compare the mass of the silver object to the mass of a piece of pure silver.

Answers

Answer:

The correct option is;

Determine the density of the object and compare the known density of pure Silver

Explanation:

The density of the object is found by finding the weight of the object, and then finding the volume (of water) the object displaces when it is immersed (in water)

The density is then fond by dividing the weighed mass by the volume the object displaces when immersed

Compare the result of the measured density with that of pure silver. If the two have density, as well as other similar physical characteristics, then the object is likely to be pure silver.

a piece of metal has a mass of 1.3 g/cm and a has a volume of 24.9 cm3 what is its mass

Answers

Answer:

34.611g

Explanation:

mass of metal = ?

density of metal = 1.39/cm³

volume = 24.9 cm³

density = mass/volume

mass = density × volume

= 1.39g/cm³ × 24.9 cm³

= 34.611g

A metal sample weighs 56.8 grams. How many ounces does this sample
weigh? (1 lb = 16 oz)

Answers

Answer:

2 oz. just multiply 56.8 with 0.03527

Explanation:

Which of the following properly explains what takes place when light hits polarized film?

A) The intensity of the light is simply dimmed

B)The planes of light become scattered

C)The scattered light has either the horizontal plane or the vertical plane blocked

D)The intensity of the light is brighten

Answers

Answer:

C)The scattered light has either the horizontal plane or the vertical plane blocked

Explanation:

When light becomes plane polarized, it means that light is made to vibrate in only one plane.

Light usually vibrate in vertical and horizontal directions but when light becomes polarized, either the vertical or horizontal direction is blocked and it is made to vibrate in only one direction

In the apple activity you completed which of the following is an example of a constant

Answers

Answer: the type of apple because it is an example of a constant

Explanation:

How is the nuclear structure of an atom similar to the non-nuclear structure?

Answers

Answer:

It has shells of protons and neutrons.

Explanation:

The nuclear structure of an atom is similar to the non-nuclear structure because has shells of protons and neutrons.

What is an atom?

An atom consists of a central nucleus that is usually surrounded by one or more electrons.

The total number of neutrons plus protons in the same both before and after the nuclear process, although the total number of protons and the total number of neutrons may be different before and after.

Hence, the nuclear structure of an atom is similar to the non-nuclear structure because has shells of protons and neutrons.

Learn more about the atoms here:

https://brainly.com/question/1566330

#SPJ2

Which statement best describes insoluble substances? Insoluble substances remain the same when in water. Insoluble substances become part of the liquid substance. Water does not remain when an insoluble substance is added. Insoluble substances change from solid to liquid states.

Answers

Answer:

Insoluble substances remain the same when in water.

Explanation:

When a substance is regarded as insoluble, it means that the substance remains the same in water.

Soluble substances usually form one continuous phase with water when they are added to water (eg when salt is added to water).

However, when camphor is added to water, it does not form a single phase with water. It remains the same in the water and maintains a separate phase from the water. Hence camphor is an insoluble substance.

pls help ill mark as brainliest :)

Q9. NH4OH + HBr H2O + NH4Br

is this combustion, synthesis, single reaction, double reaction, decomposition ?

Answers

Answer:

I think its a double reaction

Explanation:

What is the product of Na +CaSO4,

Answers

Answer:

Na + CaSO4 = Na2SO4 + Ca

Explanation:

single displacement (substitution)

A substance absorbed 895 J and caused its temperature to increase by 10 ºC. If the substance has a mass of 27.9 g, what is the substance's specific heat in J/(gºC) ?

1.) 3.21

2.) 4.62

3.) 1,406.25

4.) 249,705

Answers

Answer:

i dont get the equation sorry wish i can help

4.62 is the correct answer

NEEEDDDD HELP ASAP PLZ PLZ PLZ PLZ PLZ HELP ME

Answers

Answer:

[tex]ns^2[/tex]

Explanation:

The number of shovels and cost per 1000 kg for
Ca(OH)2

Answers

Answer:500

Explanation:

500 is the answer ..........

When the first periodic table of the elements was published, the elements were arranged by atomic mass. Although
several elements seemed out of order, later discoveries showed the order to be correct.
Which event most likely helped the development of the periodic table?
O Scientists changed the atomic masses to better fit the pattern.
O Scientists refused to consider other ways to organize the elements.
O New technology was developed that modified the masses.
O New information changed the understanding of the atom's structure.

ANSWER ASAP

Answers

its. a c but im not sure. ??.?

With radiocarbon dating, scientists compare an object's carbon-14 levels with _____. the carbon-14 levels of an object from the same time period carbon-14 levels in the atmosphere the carbon-14 levels in the rock surrounding the object the object's carbon-12 levels

Answers

Answer:carbon-14 levels in the atmosphere

Explanation:

When carrying out radiocarbon dating, the level of carbon-14 in a sample is compared with the level of carbon 14 in the atmosphere because, objects exchange carbon-14 with the atmosphere.

Comparison of the activities of carbon-14 in the atmosphere and in the sample gives the age of the sample since the half-life of carbon-14 is a constant.

the amount of carbWhat is your carbon footprint?

the amount of carbon dioxide you use when recycling
the amount of oxygen put into the atmosphere due to your consumption of fossil fuels
the amount of carbon dioxide and oxygen in the atmosphere at any given time
the amount of carbon dioxide put into the atmosphere due to your consumption of fossil fuelson dioxide put into the atmosphere due to y

Answers

Answer:

Explanation:

CAN SOMEONE PLEASE HELP ME ASAP PLEASEE ANYBODY LITERALLY ANYONE OUT THERE PLEASE

Which subatomic particle can be shared between separate atoms?

Answers

Answer:

Electrons

Explanation:

Atoms can combine together and share electrons between them. Atoms that share electrons are linked to each other in a form, called a molecule that is in a lower energy state than either of the separate atoms alone.

Pls Brainliest! It would mean a lot! ;)

PE = mgh, solve for m

Answers

Answer:

P.E. = mgh, where m is the mass in kilograms,

Answer:

[tex]m = \frac{PE}{gh} [/tex]

Explanation:

[tex]if \: PE = mgh \\ then \to \\ m = \frac{PE}{gh} [/tex]

♨Rage♨

1. True or False? The scientific method is defined as a method of research
in which a problem is identified, data is gathered, and a hypothesis is
created based off the data, then the hypothesis is tested.

Answers

Answer:

true

Explanation:

please mark BRAINLIEST

what is the concept of the doppler effect?

Answers

Doppler Effect refers to the change in wave frequency during the relative motion between a wave source and its observer. ... For instance, when a sound object moves towards you, the frequency of the sound waves increases, leading to a higher pitch.

how this is helpful!!!!

what does MA 2 means?

Answers

Answer:

Explanation:

Is this correct?
If the temperature is below the melting point the substance is a solid
If the temperature is above the boiling point the substance is a gas
If the temperature is in between the boiling and melting points the substances a liquid.

Answers

If the normal melting point of a substance is below room temperature, the substance is a liquid at room temperature.

If both the normal melting point and the normal boiling point are above room temperature, the substance is a solid.

Differences in states of matter are determined by

particle type
particle arrangement
particle color
distance between particles

Answers

Answer:

particle distance

solids are tightly packed

liquids are a little farther apart

and gases are very far

Does changing the number of neutrons affect the atomic number?

Answers

Answer:

awsdxcvawsd

Explanation:

Answer:If you change the number of neutrons in an atom, you get an isotope of the same element. The addition of a neutron can make an atom radioactive. When you change the number of protons in an atom, you will change the atom from one element to a different element.

Explanation:

Line M passes through the points (-5, 9) and (-1,9).
12
10-
8
6
2
-12-10-8-6-4-22
2
6 8 10 12 X
6
-10
-12-
Which is true of line M?

Answers

Answer:

line m is vertical line with an undefined slopel line correct answer is 6 8 10 12 x

Which option is an example of a chemical property?
A. boiling point
B. ability to react with oxygen
C. color
D. density

Answers

Answer:

boiling point

Explanation:

Option B

Protons have about the same mass as:

A. plasma particles
B. neutrons
C. electrons

Answers

the answer is B. neutrons

Other Questions

Delphi Company uses job-order costing. It applies overhead to jobs using a predetermined overhead rate based on machine-hours. At the beginning of the year, Delphi estimated that it would work 37,000 machine-hours and incur $222,000 in manufacturing overhead cost. The following transactions were recorded for the year: a. Raw materials were issued for use in production, $367,000 ($345,000 direct and $22,000 indirect). b. Employee costs were incurred: direct labor, $309,000; indirect labor, $44,000; and administrative salaries, $155,000. c. Factory depreciation, $175,000. d. Selling costs, $140,000. e. Manufacture overhead was applied to jobs. The actual machine hours for the year were 35,000 hours. a. Compute the total manufacturing overhead cost applied to jobs during the year. There are 12 students in the gym class. If 4 students can sit on 1 bench, how many benches are needed for all students ? 2x2 3x -9= (Factor completely.) Which 2 main body systems work alongside the digestive system? A 4-pack of museum tickets costs $30.28. What is the unit price? What was a NEGATIVE consequence of the Columbian Exchange? athe Spanish discovered new foods in America and shared many foods with Americans bthe Spanish brought over horses and cows to America cmillions of Native Americans died from diseases brought by the Europeans dthe Spanish built roads and aqueducts and other architectural creations HURRY PLEASE!!The particles of solids are packed together tightly, so sound waves travel faster through solids than through liquids or gases. How do light waves differ from sound waves?A. Light waves require a medium and travel fastest through liquidsB. Light waves require a medium, but travel fastest through a vacuumC. Light waves do not require a medium, but travel fastest through solidsD.Light waves do not require a medium and travel fastest when in a vacuum A gallon of gas costs an average of two dollars is Betty spends $144 a month on gas determine how many gallons of gas she uses a month After the First National Bank's charter expired,the government never chartered another national bank.a Second National Bank was chartered immediately,a Second National Bank was chartered a few years later,the government created the Federal Reserve the next year. Idk how to do this?!! Molly wants to buy a dress that costs $20. She has a coupon for 40% off, and there is a 10%sales tax. How much will she pay altogether? Answer the questions to find out. 3.How much is the 10% tax on the sale price? Explain how you found your answer. SPENCER, North Carolina (Achieve3000, May 17, 2019). Don't ever let anyone tell you that young people can't do great things. Take it from Mrs. Fleming's 7th-grade class at North Rowan Middle School in North Carolina. This compassionate classroom crew is proof-positive that young people can make a difference in the lives of others. And activism can begin with four little words: How can we help?So how do you go from sitting in a classroom to tackling the problems of the world? For Mrs. Fleming's class, it all started with learning about horrible global events that devastate individuals, families, and communities."We planned a trip to Washington, D.C., so that we could immerse ourselves in learning about the Holocaust and refugees," said Mrs. Fleming. "We [also] had the opportunity to participate in a Doctors Without Borders interactive refugee exhibit. We read Achieve3000 articles and novels about refugees, and we watched documentaries and news clips."Then, the students had yet another extraordinary experience: the chance to speak via video teleconference to a refugee named Lubo, one of the estimated 20,000 Lost Boys who found themselves displaced or orphaned during a deadly civil war that began in Sudan in the 1980s. The students were very moved by Lubo's story as he told them about what he witnessed before he fled Sudan."The enemy from the North attacked, people were caught, houses burned, nothing [was] left," student Katie P. remembered him saying. "[It was] really sad because all he had and everything he lived for was no longer there, no one to count on, nothing.""[We realized that] we usually took everything for granted," said Katie's classmate, Jennifer G. "We never appreciated what we had."It's one thing to read about history, and quite another to hear from someone who lived it, and who made it clear that Sudan is still affected by life-threatening issues like poverty and lack of access to clean water. The students knew they had to do something, and that's when they asked: "How can we help?"Soon, they found their answer.The class was invited by the nonprofit group Mothering Across Continents to host a Walk for Wisdom walkathon to raise money and awareness for impoverished schools in South Sudan. It was a great ideabut the students wanted to take it further."We said 'yes,' but asked if we could involve our whole community," Mrs. Fleming said. She joined forces with Karen Puckett, a media specialist at Isenberg Elementary School in Salisbury, North Carolina, which had participated in a school-based Walk for Wisdom for several years.Meanwhile, the students in Mrs. Fleming's class leaped into action, working in teams to design t-shirts and flyers for the April 2019 walkathon. They also created an iMovie, a website, and a GoFundMe page to help raise money.Even after all that, the students were just getting started! They planned a Refugee Awareness Community Night at their local bookstore, where they spoke to Ngor Kur Mayolanother Sudanese refugee. The event featured their presentations, art, and writing, as well as a marketplace to raise money for a source of clean water for the students at Nyarweng Primary School in South Sudan.Mrs. Fleming and her students hope they will eventually be able to exchange messages and photos with the Nyarweng Primary School pupils.All this might be just the beginning of an ongoing effort. "Our hope is that these events will turn into yearly global events for our county, and that our community will unite for a global cause to help youth in another country," Mrs. Fleming explained.Needless to say, Mrs. Fleming is extremely proud of how her class has stepped up to helpnot that she's surprised."Our students have incredible ideas," she said. "All we need to do is listen and encourage. I love seeing where my students' voices and actions can lead us."And if you want to make a difference in the lives of others, student Kimberly F. has some advice."You may think that starting a project to change the world would be difficult," she said. "But if you really put your mind into it, you can achieve amazing things. It can start with a simple act in your community, but you'll see that it will grow and grow."Most importantly, the students say, don't ever feel like you're too young to make a mark on the world."There are many things we are limited to do because we are kids," Katie said. "A lot of people may underestimate [us], but that is what drives us to stand out and help other people."The best alternate headline for this Article would be __________.A.Mothering Across Continents Arranges Walk for Wisdom WalkathonsB.Middle School Class Creates GoFundMe Page To Raise MoneyC.Students Use Achieve3000 Articles To Learn About Tragic World EventsD.Students Tackle Global Problems One "Step" at a Time A relationship between living things that depend on the sameresources at the same place and at the same time is called what happens to the wave length and frequency of a wave as it crosses a different medium and speeds Which reason for European colonization did John Cotton identify in this sermon? How does the Ten Commandments differ from the Code of Hammurabi? which note last longer two quater notes or a half note estimate the answer for 1 2/3 x 5 1/10 (type a whole number What is the equation of this line What seas make up the Atlantic Ocean