Chemistry High School

PLEASE HELP ASAP!!!!!!????

Answers

Answer 1

Answer:

The third one!

Related Questions

1. Explain where they bury remains at the Forensic Osteological Research Center and why

Answers

Answer:

In the middle of the forest.

Explanation:

They have to bury the remains in the middle of the forest at the Forensic Osteological Research Center in order to study the decomposition of the dead person. By studying the decomposition of dead person we can get a lot of information which can be used in the study of criminal cases and solving of crimes. The middle place in the forest is a perfect place to bury the remains due to presence of huge amount of microbes as well as insect that helps in the decomposition.

most of the earth's landmasses is covered by a mixture of bits of rock and bit of once~living part of plants or animal. this material is called
and its not fossil

Answers

It is a leaf ......not a fossil

Give one example of
a) Homogeneous mixture of two elements

Answers

Answer:

honey

Coffee

blood

Explanation:

These components are uniformly distrubuted and these cannot be seperated unlike heterogeneous

Water (Hydrogen and oxygen)
Ammonia (nitrogen and hydrogen)
Methane(carbon and hydrogen)
Table salt ( sodium and chlorine)

Which statement correctly describes the relationship between air temperature and air pressure?

-Warm air rises, creating an area of low pressure.

-Cool air sinks, creating an area of low pressure.

-Warm air sinks, creating an area of low pressure.

-Cool air rises, creating an area of low pressure.

Answers

Answer:

-Warm air sinks, creating an area of low pressure.

Explanation:

Heat will weigh more, than cool air!

.
Characteristics of a Group of Elements
Do not conduct electricity
• Mostly gas, but brittle when solid
Has 7 valence electrons
.
Which of these elements is in this groun?

Answers

Answer:

Gas

Explanation:

I dunno but a lucky guess i guess

Please help will mark Brainliest!!!

How many grams of HCL (hydrochloric acid) can you make with 50 grams of Cl.

H + Cl -> HCL is the balanced equation

Answers

Answer:

Explanation:

It's 21 /

how many moles is 130g of cocl2

Answers

Answer:

1.3142 mol CoCl2

Explanation:

Well, to answer this we need to find out how many grams are in a single mole of CoCl2. Two find that we need to get the molar mass of CoCl2

Co = 28.0101 g Co per mole

Cl = 35.453 * g Cl per mole

28.0101 + 2 * 35.453 = 98.9161 g CoCl2 per mole

Now, we divide:

130/98.9161 = 1.3142 mol CoCl2

There are 1.31 moles in 130grams of cobalt chloride (CoCl2). Details about how to convert mass to moles can be found below.

How to calculate number of moles?

The number of moles of a substance can be calculated by dividing the mass of the substance by its molar mass.

According to this question, there are 130g of CoCl2.

molar mass of CoCl2 = 28 + 35.5(2) = 99g/mol

moles = 130g ÷ 99g/mol

moles = 1.31 moles

Therefore, there are 1.31 moles in 130grams of cobalt chloride (CoCl2).

Learn more about number of moles at: https://brainly.com/question/14919968

The number of protons is equal to
a the number of neutrons.
b the atomic mass.
c the number of electrons.
d the atomic number.

Answers

Answer:

c the number of electrons

Explain how a long-term environmental change can lead
to the development of a new species.( its a paragraph

Answers

Answer:

Humans are modifying the world in many ways, and not all of them for the better. The changes we cause are often severe challenges to animals, plants and microbes in nature, from the introduction of pathogens or exotic invasive species to adding toxic substance or excessive nutrients, or causing climatic change. Often several changes occur at once. Nelson Hairston's lab focuses on freshwater environments, especially lakes and ponds, where some of the species present respond to environmental change with decreases in their numbers, even to the point of extinction, while others may benefit to excess, becoming so dominant that they present problems, as in the case of harmful algal blooms stimulated by nutrient enrichment or climate warming. Hairston's lab studies how individual species, food webs, and whole ecosystems are altered when the environment changes.

One way that some freshwater organisms respond to environmental change is to evolve rapidly. A marked change in the environment favors some characteristics of plants, animals and microbes over others. These character differences are often genetically based so that favored characteristics may increase in the next generation. The shorter the generation time, the faster this evolutionary change can occur. For example, tiny but abundant plankton, eaten by fish and other larger animals, can become adapted to the changed environment within a few years because their generation time is only a few days. Hairston's lab has shown that planktonic "water fleas" (Daphnia), major consumers of suspended algae in lakes, evolved to be tolerant of harmful algae within a decade of the appearance of blooms. This rapid evolution (termed "evolutionary rescue" in conservation biology) raises many intriguing questions, for all environments, not just freshwater: To what extent can we rely on species adapting rather than going extinct when their environment changes? How does the evolution of a species that plays a critical ecological role alter the interactions it has with other species, and the functioning of the entire ecosystem?

Consider the following reaction occurring in a 1.0 L container:
H2 (g) + I2 (g) → 2 HI (g)
State 2 requirements for a successful collision between H2 and I2.

Answers

Answer:

jjjjajwhejwhswjiwiwvssvwvow9qiwgdvdbslw

Newtons law of motion

Answers

Newton's laws of motion are three laws that describe the relationship between the motion of an object and the forces acting on it. The first law states that an object either remains at rest or continues to move at a constant velocity, unless it is acted upon by an external force. The second law explains how the velocity of an object changes when it is subjected to an external force. The law defines a force to be equal to change in momentum (mass times velocity) per change in time. The third law states that for every action (force) in nature there is an equal and opposite reaction

If magnesium and nickel were used as electrodes to construct an electrochemical cell like the one shown at right, which metal would form the anode and which the cathode?

anode:

cathode:

Answers

Answer:

anode: magnesium

cathode: nickel

Explanation:

edg. 2021

Other Questions

Below are several names of companies and their founders. Explain whether the business creates and sells innovative products or uses innovative methods or both Federal and State powers are divided into three types: Concurrent, Reserved, and Delegated Powers. can you list three examples of the powers given to the Federal and State governments under the US Constitution. Please help fastThe graph below shows a company's profit f(x), in dollars, depending on the price of goods x, in dollars, being sold by thecompany:Part A: What do the x-intercepts and maximum value of the graph represent?prefent? ?Part B: What are the intervals where the function is increasing and decreasing, and what do they represent about the sale andprofit?Part C: What is an approximate average rate of change of the graph from x = 1 to x = 3, and what does this rate represent? Who took control of the "Holy land" in the 1000s? could somebody answer these questions please 50 points and Ill give brainiest - please help ASAP with WORK FOR IT please and thank you!! :)2 pages with work Which statement best evaluates how well this narrative establishes a clear focus? Solve the equation by completing the square.a2 - 14a - 32 = 0 if margrate has a basket of apples and pears. the number of apples equals three more than twice the number of pears. if there are 15 pieces ot fruite altogether how many apple and pears are there? i am so bad at english First StepsTHE LANDINGAs the lander hit, Maria drew a jagged breath, and her chest muscles clenched tight with anxiety. Captain Curran, the group leader, turned around and smiled at Maria and her five friends. All right, he said with forced joviality. Who wants to be the first of the generations born in space to set foot on a real planet?Maria waited for someone else to speak or raise their hand. Next to her, Allen just stared at the floor of the lander muttering, Not me, not me.She glanced at Lily, who Maria had always known to be fearless, but Lily bit her lip and turned away. Javier looked positively gray, and the twins buried their faces in their hands. Someone would have to be first. Maria closed her eyes and took a few meditative breaths, waiting for someone else to volunteer, but the lander was silent. FINDING COURAGEThe radio crackled to life. Lander one, this is Mothership, do you copy?Yes, Captain Curran answered. Weve landed safely and are waiting to exit the lander, but theres just a littledisagreementover which pioneer wants to be the first to set foot on our new home.Tell them theres plenty for everyone to see, and theyre going to love it out there, the voice on the radio responded. I wish it were me instead of you; I miss the feel of real air on my face.Captain Curran flipped off the microphone. You six have lived your entire lives in space, and its a great privilege to be the first of your generation to see a new planet. The others are watching; if youre afraid, theyll be afraid. Cant any of you find the courage to set an example?Maria shifted uncomfortably in her seat and thought of her parents; they had traveled across the galaxy to find their family a new home, with clean air and good soil, and she knew this planet was for them. Ill do it, Captain, she mumbled as she slipped out of her harness and rose out of her seat. Maria couldnt shake the feeling of trepidation as she stood and watched the doors of the lander slide open.A NEW WORLDA burst of air hit Maria in the face. She scrunched up her nose as an unfamiliar assortment of odors hit her nostrils. Some smelled sweet, some disgusting, and some were just strange. There were never strange smells on the ship; everything was always the same there. What was it going to be like to live where things changed? The rest of the children gathered around the opening as she climbed down the ladder, and Maria tried to smile as she met their worried eyes. Then, suddenly, something crunched underneath her boots; she was standing on the surface of the planet, and it felt nothing like the smooth metallic halls that shed known all her life.Without letting go of the ladder, she turned around to look at the world around the lander. The soil was full of shapes and textures; there were some small, grainy pieces, then larger clumps that she could break with the toe of her boot. One piece was hard and smooth, and she let go of the ladder to pick it up. Captain, she called, I think Ive found a rock!The air was moving, and long, thin, green things bowed and danced. Grasses, Maria whispered to herself, remembering the videos in her science lessons. She let go of the ladder and took soft, slow steps and realized her arms and legs felt like they were full of lead. Natural gravity, she whispered to herself. She started to walk a little more quickly, getting used to the new sensation. She was doing what others had previously thought impossibletaking steps on a new world.A creature with gossamer wings landed on her nose, and she crossed her eyes trying to get a good look at it. Something small and furry scurried across her feet as she spun in a slow circle. Inspired, she ran as fast as she could across the foreign soil; shed never seen somewhere so big, and it was thrilling. Suddenly, a deep, low sound echoed around her. Thats the call of a hornbeast, Captain Curran shouted from the bottom of the ladder. Maria glanced back and saw that he was helping her friends take tentative first steps in the new world. Walk to your left a little, and there should be a streamflowing water on the ground; they often go there to drink, the explorers say.She started to run in that direction and then paused. Hurry up! she yelled, unable to contain her enthusiasm. Our new home is extraordinary!In First Steps, which theme is developed by Marias volunteering to leave the lander?Great tasks can be accomplished by working as a team.Taking unnecessary risks is foolish.It takes courage to be the first to try something new.Some things cannot be learned in school. Out of all the towns found in the Harrapan Civilization, which was the ideal town planning? Aleksandra started studying how the number of branches on her tree grows over time. Every 1.51.51, point, 5 years, the number of branches increases by an addition of \dfrac{2}{7} 7 2 start fraction, 2, divided by, 7, end fraction of the total number of branches. The number of branches can be modeled by a function, NNN, which depends on the amount of time, ttt (in years). When Aleksandra began the study, her tree had 525252 branches. Write a function that models the number of branches ttt years since Aleksandra began studying her tree. N(t) =N(t)=N, left parenthesis, t, right parenthesis, equals Please help me figure this out Select the correct answer.Jason regularly visits cattle farms to examine and vaccinate cows. His Job also requires him to go to slaughterhouses to examine animals beforeand after slaughter. What Is Jason's profession?O A companion animal veterinarianOB. public health veterinarian.food animal veterinarianOD.food safety veterinarian Solve for the x.Assume the segments that appear to be tangent are tangent. how are rabbits different from bacteria Beryllium is an extremely lightweight metal that is used in many industries, such as aerospace and electronics. Long-term exposure to beryllium can cause people to become sensitized. Once an individual is sensitized, continued exposure can result in chronic beryllium disease, which involves scarring of the lungs. In a study of the effects of exposure to beryllium disease, which involves scarring of the lungs. In a study of the effects of exposure to beryllium, workers were categorized by their duration of exposure (in years) and by their disease status (diseased, sensitized, or normal.) The results were as follows: Duration of Exposure < 1 1 to < 5 >= 5Diseased 12 10 18Sensitized 14 18 13Normal 66 142 210Required:a. Compute the expected frequencies of diseased workers.b. Compute the expected frequencies of sensitized workers.c. How many degrees of freedom are there? The size of the coyote population at a national park increases at the rate of 4.3% per year. If the sizeof the current population is 183, find how many coyotes there should be in 6 years. Usey = yoe^0.043t and round to the nearest whole number.A) 235B) 241C) 239D) 237 A Collage is made by?