Answer:
Both A and B will be chemically unreactive
Explanation:
Answer:
C
Explanation:
Help me with this please don’t scam me
Answer:
A is the answer it is correct
Answer:
A
Explanation:
trust me
I need help with science pls help me!
what us energy stored in an object called
Answer:
potential energy
Explanation:
Answer:
Potential energy is the energy stored within an object, due to the object's position, arrangement or state. Potential energy is one of the two main forms of energy, along with kinetic energy.
Explanation:
To launch a rocket, liquid oxygen and liquid hydrogen are combined inside the rocket engine to react explosively. How do you think scientists take into account the law of conservation of mass when they calculate the amount of fuel needed for a rocket launch?
Answer:
Explanation:
In this chemistry lab, students investigate how to build and launch a simple rocket that uses hydrogen and oxygen gases that will be mixed to propel the rocket (large bulb plastic pipette). Students will understand the principles of combustion reactions, kinetics, stoichiometry of reactions, activation energy, explosive mixtures, rocketry, and different types of chemical reactions. Students will explore and determine the proportions of hydrogen and oxygen mixture that will achieve the best launch results. Students will compare the balanced chemical reaction of hydrogen and oxygen with their lab results; students should discover that the optimal distance occurs when the mixture of hydrogen and oxygen is two to one hydrogen, oxygen mixture ratio and this can be determined theoretically from the balanced chemical reaction equation. Students will perform the lab, collect data, and discuss, compare, and contrast their lab findings with the balanced chemical reaction equation. Students will present their structured inquiry investigations using a power-point presentation. Other groups along with the teacher will assess each group by using a provided rubric. Group assessments will be the deciding assessment for the final lab score. A follow up activity could investigate how NASA scientists launch real rockets into space and propose a procedure to investigate and collect data on a launching a heavier object at the school football field.
Why does the flow rate of a fluid with large particles increase?
NEED ANSWER ASAP!!!
Answer:
The viscosity of intestinal contents should define the mixing, diffusion and flow of nutrients and other materials in digesta (1–4). The viscosity of intestinal contents has been measured only after the removal of solid particles by centrifugation (5,6), under the assumption that particles or insoluble fibers in the diet do not affect the viscosity of gut contents (7). However, the complete removal of solid particles considerably reduced the coefficient of viscosity of pig cecal contents and changed the contents from a non-Newtonian to a Newtonian fluid in our recent study
What makes a metal and a non metal most
reactive? Where in the PT will you find the most
reactive metal and the most reactive non metal.?
Answer:
Explanation:
The reactivity of elements in the periodic table is based on the number of electrons in there outermost shell. Elements (metals) that have few electrons in there outermost shell are highly reactive because it is easier to lose fewer number of electrons (in the outermost shell during a reaction) than to lose more electrons in the outermost shell - thus metals that have one electron in there outermost shell are most reactive and are more reactive than those that have two electrons in there outermost shell. Hence, metals in group 1 are the most reactive metals because they all have one electron in there outermost shell.
Non-metals that have fewer electrons to complete there octet configuration are highly reactive because it is easier to gain fewer number of electrons (in the outermost shell during a reaction) than to gain more number of electrons - thus nonmetals that have seven electrons in there outermost shell are more reactive than nonmetals that have six electrons in there outermost shell. Hence, nonmetals in group 17 are the most reactive nonmetals because they contain seven electrons and have just one electron left to complete there octet configuration.
Help please Where does your water come from? Your tap or a bottle is not a valid answer.
where the water is actually collected, where it comes from originally, and how it actually gets
delivered to our houses in Southern California
Answer:
-water is collected from nearby water holes and put in a water tower after it's clean
Answer:
Your water comes from rivers and streams.
Explanation:
The water is collected from rivers and stream and gets delivered from the storage tank to the pipes of our house
A mixture of hydrogen and oxygen gases has a total pressure of 5.50 atm. What is the partial pressure of the hydrogen if the P(O2) = 1250 mm Hg?
Answer:
P O 2 = 5.21 atm P C O 2 = 4.79 atm
Explanation:
Hope it helps!
Explain an example of how energy is transferred from one form to another
Answer:
Energy can be converted from one form to another. Examples: Gasoline (chemical) is put into our cars, and with the help of electrical energy from a battery, provides mechanical (kinetic) energy. Similarly, purchased electricity goes into an electric bulb and is converted to visible light and heat energy.
Answer:
Energy is transferred from one this to another in multiple forms, but mostly kinetic.
Explanation:
Which is not an indicator for a chemical change?
A. Dissolving sugar
B. Unexpected temperature change
C. Unexpected color change
D. Combustion
Answer:
A
Explanation:
Because it does not change entirely.
Determine the number of atoms of 25 g iron(II) chloride
Answer:
3.56x10²³ atoms
Explanation:
To solve this question we need first to determine the moles of iron (II) chloride, FeCl₂, using its molar mass. Then, using Avogadro's number we can solve for the number of atoms:
Moles FeCl₂ - Molar mass: 126.751g/mol-
25g FeCl₂ * (1mol / 126.751g) = 0.1972 moles
Number of atoms:
1 mole of FeCl₂ are 6.022x10²³ molecules of FeCl₂, that means 0.1972moles are:
0.1972mol * (6.022x10²³ molecules / 1mol) = 1.188x10²³ molecules of FeCl₂
In 1 molecule of FeCl₂ there are 3 atoms (1 of Fe and 2 of Cl), in 1.188x10²³ molecules of FeCl₂ there are:
1.188x10²³ molecules of FeCl₂ * (3atoms / molecule) =
3.56x10²³ atomsWhich is the soft stone??
Answer:
Various soft stones were employed, the most popular being lime- stone basalt.
Explanation:
explain
diffusion in solids
have a great day
Answer: Well,diffusion does not happen in solids because the particles are not free to move around and so they cannot inter-mix.
What are some facts about light?
Answer:
A neon lamp was switched on during the Great Depression and continued to burn until it was discovered some 77 years later. The electricity bill came up to a whopping $17 000!
Explanation:
Is boiling point and melting point are physical properties? (Answer quicklyyyyy)
A physical property is a characteristic of matter that is not associated with a change in its chemical composition. Familiar examples of physical properties include density, color, hardness, melting and boiling points, and electrical conductivity.
magsulat sa iyong sailing lyrics na kanta the tune of meron leron sinta
Answer:
I am sailing
I am sailing
Home again
'Cross the sea
I am sailing
Stormy waters
To be near you
To be free
I am flying
I am flying
Like a bird
'Cross the sky
I am flying
Passing high clouds
To be with you
To be free
Can you hear me, can you hear me
Through the dark night, far away
I am dying, forever crying
To be with you, who can say
Can you hear me, can you hear me
Through the dark night far away
I am dying, forever crying
To be with you, who can say
We are sailing, we are sailing
Home again
'Cross the sea
We are sailing
Stormy waters
To be near you
To be free
Oh Lord, to be near you, to be free
Oh Lord, to be near you, to be free
Oh Lord, to be near you, to be free
Oh Lord
Explanation:
I hope this is the right one
Pls pls pls help me!!! I would appreciate it so much. I failed this test and this is my make up test and if I fail this I’m grounded
Answer:
Bulb C
Explanation:
Bulb C because it is closes to the battery and because it's closest to the battery it means that, that specific bulb will be powered more defiantly and carry more electricity.
Answer:
C
Explanation
Bulb C because it is closes to the battery
What kind of reaction is this?
Answer:
Single replacement
Explanation:
Chemical equation:
2Al(NO₃)₃ + 3Ca → 3Ca(NO₃)₂ + 2Al
Single replacement:
It is the reaction in which one elements replace the other element in compound.
AB + C → AC + B
All other options are incorrect because,
Double replacement:
It is the reaction in which two compound exchange their ions and form new compounds.
AB + CD → AD +CB
Synthesis reaction:
It is the reaction in which two or more simple substance react to give one or more complex product.
Decomposition reaction:
It is the reaction in which one reactant is break down into two or more product.
AB → A + B
Combustion reaction:
Reaction in substance react with oxygen and form carbon dioxide and water.
Need help with pt 3 of Density worksheet
formula p=m/V
Explanation:
0.79
6.35
1.79
To find the density you have to divide the mass by volume
hope it helps!
2 points
Identify the basic law on the behavior of matter: States that mass is
neither created nor destroyed in a chemical reaction or physical changes.
Law of conservation of mass
Law of definite proportions
Law of multiple proportions
Identify the scientist that contributed to the atomic theory: He conducted 2 points
d the nucleus has a nositive charge.
Answer:
Law of conservation of mass
Ernest Rutherford
Explanation:
The basic law of behavior of matter that states that "mass is neither created nor destroyed in a chemical reaction or physical change".
This is the law of conservation of mass. It is very essential in understanding most chemical reaction. Also, in quantitative analysis, this law is pivotal.
Ernest Rutherford was the scientist that stated that the nucleus is made up of positive charge. It was not until James Chadwick in 1932 discovered the neutron that we had an understanding of this nuclear component.
Rutherford surmised from his experiment that because most the alpha particles passed through the thin Gold foil and just a tiny fraction was deflected back, the atom is made is made up of small nucleus that is positively charged.
*CHEMISTRY*
*WILL GIVE BRAINEST*
A 5-liter sample of gas initially at 50°C is observed to expand to 5.5 liters when the temperature is raised to 100°C. After further increase in temperature, the volume is 6 liters. What is the approximate temperature (within 50 degrees) of the final state of the gas?
O 50°C
O 100°C
O 150°C
O 200°C
Answer:
150
Explanation:
.5 liter increase every temperature 50°C.
5 liter= 50 C
5.5 liter= 100 C
6 liter= 150 C
Which of the following statements about the elements in group 2 of the periodic table is true?
They all tend to become positive ions when they bond with other elements.
They all have similar chemical and physical properties.
They all have two electrons in their outermost shell.
They are all metals.
Answer:
they all have two electrons in their outermost shell
The elements of group 2 are alkaline earth metals that have two electrons in their outermost shell. So they have similar chemical and physical properties and tend to become positive ions in bond formation.
What are the properties of the elements of group 2?The elements present in group 2 include Beryllium, Magnesium, Calcium, Strontium, Barium, and Radium.
The elements of group 2 are similar in their physical and chemical properties as all the elements have the same number of valence electrons. All alkaline earth metals are silvery-white-colored solids under normal conditions. They are also shiny and quite reactive.
The general electronic configuration of group 2 elements is ns². The alkaline earth metals have fully filled s-orbital in their valence shells, they tend to lose two electrons to produce cations with +2 charge.
Therefore, the elements of group 2 are electropositive in nature. Therefore, all the given statements about group 2 of the periodic table are true.
Learn more about elements of group 2, here:
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Can someone please help me
Answer:
A
Explanation:
This is the answer because:
Rainfall highly helps the trees on the mountains grow. The location of a tree also matters a lot because it has to be in a spot where it can reach sunlight and lots of rain.
Therefore, the answer is A.
Hope this helps! :D
Help please!
1. L
2. M
3. X
4. Z
how does the periodic table tell me if a element is solid, liquid, gas, or man made?
Answer:
if you search up the periodic table and go to any website it will let you press on the element and it will say if it is a gas,solid or liquid and it might say if it is man made!
Explanation:
i really hope this helps:)
please help again I'm timed again
Answer:
melting evaporation
Explanation:
melting decreases because its melting out of form
Answer:the answer should be A E and F
Explanation:
They all use decreased energy
when does a double replacement reaction occur
Answer:
u should call me justin bc I was just in your mom
Answer:
he periodic table or an activity series can help predict whether single-replacement reactions occur. A double-replacement reaction exchanges the cations (or the anions) of two ionic compounds. A precipitation reaction is a double-replacement reaction in which one
Explanation:
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Answer:
Ridges
Explanation:
Ridges separate watersheds
Hope this helped!
If an atom has an atomic number of 17 and a mass of 35, how many neutron does it have?
Will give brainliest
Answer:
18
Explanation:
(atomic number = protons) mass minus protons= neutrons.
PLEASE HELP I CAN NOT FAIL THIS TEST I REALLY NEED HELP ASAP
Which of the body's systems directly tells the heart when to beat?
OA. the circulatory system
OB. the nervous system
OC. the respiratory system
OD. the digestive system
Answer:
OB. the nervous system
Explanation:
The Medulla Oblongata helps to regulate important functions such as heartbeat and breathing.