Chemistry Middle School

please help quick im on a test and i only got an few mins left

What Is the Reactivity Series? ...

How Do Glow Sticks Glow? ...

How Do You Get Different Coloured Fireworks? ...

What Is an Alloy? ...

Answers

Answer 1

Answer:

hey

Explanation:

Answer 2

Answer:

I'm really not sure

Explanation:

So there's the answer

Related Questions

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

The rainforest contains what percentage of all of the species in the world?
25%
50%
75%
10%

Answers

Answer:

I think 50%

Explanation:

I believe it’s about 50% :)

Which simple machines make up scissors?

A) one lever and one wedge
B) two levers and two wedges
C) one inclined plane and two pulleys
D) two inclined planes and two levers

Answers

A) one lever and one wedge
the answer is A) one lever and one wedge

Balance the following reaction CS2+Cl2. CCl4+S2Cl2

Answers

Answer:

CS₂ + 3Cl₂ ⇒ CCl₄ + S₂Cl₂

Explanation:

This one is relatively simple. When we take inventory of both sides, we see 1 Carbon, 2 Sulfurs, and 2 Chlorines on the reactant side, and 1 Carbon, 2 Sulfurs, and 6 Chlorines on the product side. Since we have Cl₂ on the left and we want 6 on the left, let's add a coefficient of 3 to Cl₂. This balances everything out! Final answer: CS₂ + 3Cl₂ ⇒ CCl₄ + S₂Cl₂. Hope this helps!

*I’m confused? Pls help, it’s due tmr*
Modeling Tool: Two Samples at the Atomic Scale
Goal: Create a model that represents a repeating group of atoms that could make up sample 2.

*Im confused? Pls help, its due tmr*Modeling Tool: Two Samples at the Atomic ScaleGoal: Create a model

Answers

Answer:

PENTANE

Explanation:

*Im confused? Pls help, its due tmr*Modeling Tool: Two Samples at the Atomic ScaleGoal: Create a model
The answer on top is correct its pentane, a quick search will show you the structure, sadly i could t find one that looks like yours on the left so id just suggest from the info from the structures put the appropriate amount of carbon in the middle and have the hydrogen surround it. Good luck with your home work

Two students mixed up a new salt solution and put in blue and red food coloring to make it purple. They weighed 35 mL of the solution and found its mass to be 41 g. Where would the purple layer form if it were used with the four solutions above? Show your math.

Answer:

The density of the purple solution is _________________________.

The purple solution would form a layer __________________________.

Answers

Answer:

1435

Explanation:

i did the math and this is what i got i think its right but i dont know

instruction
ACTIVO
Describing the Energy on a Slide
CE
A
Each sentence describes potential and kinetic energy
at various locations on a slide. Complete each
statement by selecting the position of the object on the
slide.
An object at position vhas all kinetic energy
An object at position has all potential energy
An object at position has about half potential energy
and half kinetic energy,
B
С
Intro
Done

instructionACTIVODescribing the Energy on a SlideCEAEach sentence describes potential and kinetic energyat

Answers

Answer:

An object at position A. has all potential energy

An object at position B. has about half potential and half kinetic energy

An object at position C. has all kinetic energy

Explanation:

I already did it and got all of them correct. I hope this helped!! :)

I get it! Now I know that atomic theory changed with time because...?

Answers

Answer:

Because more experiments gave more data, theories and models for atoms changed to be more accurate over time. Scientists discovered the small pieces of atoms (electrons-negatively charged and protons-positively charged) and changed their ideas of how they were put together.

Explanation:

The atomic theory changed with time because each scientist went behind another scientist and added on to their ideas and their theories. The models and everything changed as new things about the atom were being discovered. For example, some scientists saw that electrons did not have a specific placement in an atom and instead, it moves around freely in the electron cloud which changed the atomic model later on.

Have an amazing day! Remember that you are loved and that you will do big things in life:)

The image shows the gravitational effects of the moon (not shown) on the Earth (depicted here) and the resulting tides that form. Which statements are true about the gravitational force between the Earth and the moon? Select ALL that apply.
Responses
A The moon exerts equal gravitational force on all locations of the Earth
B The moon exerts a smaller gravitational force on Earth locations that are farther away
C The moon must be to the right of the Earth because gravity is an attractive force.
D The moon must be to the left of the Earth because gravity is a repulsive force.
E The moon exerts a greater gravitational force on the Earth than the sun does.

Answers

Answer: B

Explanation:

Brainliest please! (if im right)

The answer is B The moon exerts a smaller gravitational force on Earth locations that are farther away

Which produces more energy, aerobic respiration or fermentation

Answers

Answer:

Aerobic Respiration.

Explanation:

Aerobic respiration refers to the metabolic pathways by which organisms break down glucose to produce ATP. ... Fermentation produces relatively less energy than respiration, because fermentation does not result in the complete oxidation of glucose.

Please help me !!


Is mass conserved when 200 g of water undergoes a physical change? Use complete sentences to support your answer by explaining how this can be demonstrated.

Answers

Answer: Yes, the mass will remain conserved during a physical change.

Explanation: Law of conservation of mass states that mass can neither be created nor be destroyed, but it can only be transformed from one form to another form. In a reaction, total mass on the reactant side will always be equal to the total mass on the product side.

The mass will remain the same; mass is matter and it cannot be created or destroyed

Pepsi
Vinegar
Orange Juice


What property do all three of these common household substances have in common?


a

They all have a pH above 7.

b

They all taste bitter.

c

They are all acidic.

d

They all turn litmus paper blue.

Pls Helppp :(

Answers

Answer:

D they are all acidic

Explanation:

This is because they are positively charged by hydroniums

They are all acidic

atoms and molecules are made up of

Answers

Les atomes sont composés de protons, électrons et neutrons.

Please help me with this.

Please help me with this.

Answers

Answer:

A. pea

Explanation:

The answer is pea because there is a pea there

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

HEEEELP!!! THIS IS DUE TODAY
What is one of the most important forms of energy? Give two examples of how this type of energy is used in our lives.

Answers

Public transportation uses electrical energy.
Refrigeration used electrical energy.

Answer:

"There is no God but Allah, and Muhammad is his messenger." This is the basic statement of the Islamic faith: anyone who cannot recite this wholeheartedly is not a Muslim. When a Muslim recites this they proclaim: That Allah is the only God, and that Muhammad is his prophet.

I hope u find the right path

Explanation:

Oil is a powerful source of energy used for cars, machines, and many other purposes. While studying sources of energy that could replace the use of oil, a student thinks about solar power, wind power, nuclear power, and electric batteries. The students asks,"Which type of source will waste the least energy and provide the most energy in all situations?"

Which best describes why a scientist would ask a different question than this one?

O The question asks about subjective personal preferences regarding energy.
O The question focuses on the objective measurements of amounts of energy.
O The question has too wide of a focus, as though all situations can be studied at once.
O The question is focused on the future and finding new answers about changing needs.

Answers

Answer:

C

Explanation:

scientists usually focus on one specific problem, rather than a whole range. so the answer would be that it's too wide a focus.

btw this is where the crown is on the bottom of the question

Oil is a powerful source of energy used for cars, machines, and many other purposes. While studying sources

Answer:

c

Explanation:

Which components of a galaxy move in circular patterns or revolve around a star?
A . dust
B . Gas
C . Other orbiting object
D . sun

Answers

Answer:

C.

Explanation:

It's becase of the gavitational pull of a star or sun

The answer is c I hope that helps

Define reference frame in your own words. Give an example of how you could use different reference frames for the same motion.

Answers

Answer:

Reference frame can be defined as from the perspective of an individual to tell if an object is moving.

Example:

Eienstien used a reference frame in his train thought experiment.

you are in a moving car and you past a car but you check another the car you pasted to see that your moving.

Aiden has $100 in a savings account that earns 10% annually.The interest is not compounded. How much will he have in 1 year?

Answers

Answer:

Explanation:

Sorry dunno

i think it might be this

10/100 x $100 = $10
12 x 10 = $ 120

PLEASE HELP ME LIKE RIGHT NOW!!

PLEASE HELP ME LIKE RIGHT NOW!!

Answers

Answer:

Can't be answered without the lab.

Where is the lab? I can't answee without it

Which unit listed below is NOT a standard unit of measure?

inches

meters

pint

quart





its science btw

Answers

Answer:

pint

Explanation:

Answer.............

I am pretty sure it’s c.

Please do this, im posting more! ASAP.

Please do this, im posting more! ASAP.

Answers

A warm front is also defined as the transition zone where a warmer air mass is replacing a cooler air mass
Dew point: The point at which air saturated with water vapor produces condensation which forms dew.
Humidity is the state or quality of being humid

Please help, I don't get what does this means

3. Name the compound sodium makes with the following elements.
(a) Calcium carbonate: ​

Answers

Answer: hydrogen-carbonate.

Explanation:Because when carbon dioxide is passed in excess it leads to a formation of hydrogen-carbonate.

I hope everyone finds this helpful

the reaction of sodium and calcium carbonate gives sodium carbonate

How can temperature lead to weathering of rocks? (1 point)How can temperature lead to weathering of rocks? (1 point)

a. Rocks become ice when they get cold, which can later melt and wash away.

b. Rocks can melt when they become hot, which can lead to pieces breaking off.

c. Rocks expand and contract when they are heated and cooled which cause them to break.

d. Rocks move faster when they are heated, which can cause the pieces to eventually
Which part of Earth experiences physical weathering? (1 point)
a crust
b inner core
c mantle
d outer core
Which is the last stage of physical weathering in rocks? (1 point)
a boulder
b pebble
c sand
d rock
What must be present on a rock that undergoes frost wedging?(1 point)
a sharp edges
b round shape
c holes around it
d crack

Answers

Rocks expand and contract when they are heated and cooled which cause them to break. Physical weathering is experienced to the crust of earth. The last state of physical weathering is sand. Rocks that have some cracks are undergoing frost wedging.

What is weathering?

Weathering is a geographical process of deterioration of rocks and minerals into parts and eventually into dust and sand. Thermal stress, a phenomenon caused by temperature variations, can also contribute to mechanical weathering.

The expansion and contraction of rock is influenced by temperature changes. The rock's structure deteriorates as this occurs repeatedly. Physical weathering and mechanical weathering disintegrates rocks without any chemical changes and  it happens to the earth's crust.

Erosion of rocks eventually results in formation of sand. Frost wedging is a process by which ice erodes the rocks having cracks. It is also called ice wedging.

To find more on rock weathering, refer here:

https://brainly.com/question/28755105

#SPJ2

Answer: How can temperature lead to weathering of rocks= Rocks expand and contract when they are heated and cooled which cause them to break.

Which part of Earth experiences physical weathering= crust

Which is the last stage of physical weathering in rocks= sand

What must be present on a rock that undergoes frost wedging= a crack

Explanation: I took the test

Which choice describes an organism found in the understory of a rainforest? Responses

A. Palms and other small trees

B. Very tall trees

C. Bacteria

D. Thick, woody vines

Answers

Answer:  Palms and other small trees

Explanation:

Answer:

A. Palms and other small trees

Explanation:

Understory Layer

Located several meters below the canopy, the understory is an even darker, stiller, and more humid environment. Plants here, such as palms and philodendrons, are much shorter and have larger leaves than plants that dominate the canopy. Understory plants’ large leaves catch the minimal sunlight reaching beyond the dense canopy.

https://brainly.com/question/21423132

What is the main way viruses cause disease in the body
A. By feeding directly on your body parts
B. By using your body's cells to make new viruses
C. By absorbing nutrients from your bloodstream
D. By breaking down your body's cells for nutrients

What is the main way viruses cause disease in the bodyA. By feeding directly on your body partsB. By

Answers

I think the answer is B

Answer:

the answer is B

Explanation:

this is because viruses need to enter a host cell to start reproduce. they usually use your cell to create "virus making factories".

hope it helps

no problems

Science questions answer to get 20 points

Science questions answer to get 20 points

Answers

Answer: (Q1) B.      (Q2)  D.    (Q3) B. I believe   (Q4) C.

Explanation: (Q3) B the medulla isn't playing a physical part in digestion as much as it controls the process this is a educated guess  

Question3 because he said so i don’t know how many words to right



help me on this question please need answer today.


How do you think plants would grow in space? Which tropism(s) would be affected and why?

Answers

Answer: Mainly gravitropism because of the lack of gravity. The other two tropisms depend on the circumstance that it is in.

Explanation:

Answer: Plants use other environmental factors, such as light, to orient and guide growth

Explanation: In the absence of gravity, plants use other environmental factors, such as light, to orient and guide growth. A bank of light-emitting diodes (LEDs) above the plants produces a spectrum of light suited for the plants' growth.

Which element is represented by this model?


Be; Beryllium
N; Nitrogen
C; Carbon
F: Fluorine

Which element is represented by this model?Be; BerylliumN; NitrogenC; CarbonF: Fluorine

Answers

Answer: C; Carbon

Explanation: The model is showing it has 6 electrons, 6 protons, and 6 neutrons. Therefore the element, carbon.

Answer:

Carbon

Ok it needs more characters

Which element is represented by this model?Be; BerylliumN; NitrogenC; CarbonF: Fluorine
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Integral proteins are located 21-2022The map below shows the total number of people on death row in the United States as of 2012MT2NOOR37MENVTOID14SDWYWY14MXVSON11NH1NYYMOn.oRIOCT-11NJODE 19MDSUT9CACO4KS10AZNM0OK1930 ILIN OH014151MO47ARTN-5840MSAL GAA562029989AK0TX312OFZ102FEDERAL-60HI.Source: Adapted from the Death Penalty Information CenterWhich constitutional relationship does the map illustrate?O enumerated powersconcurrent powerso delegated powersreserved powers a nurse is providing care to several clients who have undergone surgery. when reviewing their electronic health records, which information would the nurse identify as reflecting a nursing diagnosis? select all that apply. a. Using the expressions for efficiency units, (y=Y/EL, k=k/EL, l=I/EL), derive the production function in efficiency units.b. Derive the fundamental equation of capital in efficiency units. (Hint: The equation should not include output or investment.)Consider an economy where both objects and ideas are produced. In particular, the production function of objects is 1-a K [(1 u)EL] and the production function of ideas is where Y is output, K is capital, L is labor, E is efficiency level, u is the fraction of labor employed in the idea production sector, and g(u) 0 is the growth rate of efficiency level. Capital accumulates with investment and investment is a fraction of output: AK I sY where I is investment, is the depreciation rate of capital, and s is the savings rate. Assume that labor is fixed in this economy. 5. The perimeter of a rectangular outdoor patio is 54feet. The length is 3 feet greater than its width. Whatare the dimensions of the patio? Note: Label the partsof a rectangle. The map key shows that a map distance of 1/4 in. represents an actual distance of 5/8 mi. The actual distance from Portland to Beaverton is 8 miles how far is it on the map? Which of the following is true about the way World War I ended with the Treaty of Versailles? 3. If your teacher uses domain-specific vocabulary in a book report assignment, which words might the assignment include?divide and conquershow and tellcalculate and solvesummarize and describe To be fluent in computer language you must learn 8000 __________? (9 letter word) Divide 5/8 by 3/4 Simplify your answer and write it as a mixed number. What primary argument is Wilberforce making for the abolition of the slave trade in this passage? A red purse contains $7, and a black purse contains $10. Each package contains X red purses and Y black purses. If there are N packages (N 2) and the total value of them is $2021 and if each of X, Y, and N are positive integers, what is X+Y+N? Find an equation for the tangent plane to the surface z = 2y - 2 at the point P(ro, yo, zo) on this surface if zo=yo = 1. You are the HR manager of a professional services firm with 300 employees. Your company uses annual reviews along with frequent check-in meetings throughout the year as part of the performance management. Employees are evaluated on a number of questions assessing customer service quality and sales volume (results of a customer satisfaction survey and actual sales metrics, weighted at 60%) and demonstrating corporate values in day-to-day activities (mentoring others, driving change, and creativity, weighted at 40%).The annual reviews have just been completed, and you heard from Orlando Nicholson, an employee who has been with the firm for 2 years. Orlando has a cordial but distant relationship with his manager. He asked for a meeting with you and revealed that he believe the most recent performance review here received is unfair. Orlando feels that his customer satisfaction scores are modest, but this is due to being assigned some of the most difficult clients the company has. In addition, the manager rated him as average in mentoring others, discounting the fact the he was heavily involved in the onboarding of two new employees 8 months ago. Orlando also believes that his relatively quietly and shy personality is being held against him. He thinks that he heavily influences organizations change, but this happens informally and not in big meetings. In fact, there have been several times when he perceives that other people took credit for his ideas.1. What would you advise Orlando to do in this meeting? Why2. Are there any system changes you could think of that may help prevent instances like these from happening in the future? What are they? Rewrite in simplest terms: 5(-C - c - 1) - 4c A new Outdoor Recreation Center is being built in Hadleyville. The perimeter of the rectangular playing field is 318 yards. The length of the field is 5 yards less thantriple the width. What are the dimensions of the playing field?yards.