Answer:
This is a verified chemical change. On the other hand, if you add red ink to water, it will turn red. However, we would classify that as a physical change. To conclude, color change is a great indicator that change has occurred.
Explanation:
This is since there are examples of color change being an indicator for both of them. For instance, when you heat the blue copper(II) hydroxide solution, you'll eventually end up with a black copper oxide ( Cu O ) solution. This is a verified chemical change. On the other hand, if you add red ink to water, it will turn red. However, we would classify that as a physical change.
To conclude, color change is a great indicator that change has occurred. However, it does not tell you which type of change might have occurred. You will want to use better indicators - like release of heat - to guide you with that.
Hope that helped :)
The main function of the nervous system in our body is to ?
The nervous system helps all the parts of the body to communicate with each other. It also reacts to changes both outside and inside the body. The nervous system uses both electrical and chemical means to send and receive messages.
Your nervous system is your body's command center. Originating from your brain, it controls your movements, thoughts and automatic responses to the world around you. It also controls other body systems and processes, such as digestion, breathing and sexual development (puberty).
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What element am I ? Help please
_____ 1. This element has the highest electronegativity of all the elements and it has the smallest atomic radius among the halogens.
_____ 3. This element has four valence electrons and properties similar to carbon. Its atomic radius is less than tin and it is more electronegative than
_____ 5. This transition metal is in period five. It has properties similar to Dubnium and lower ionization energy than chromium.
_____ 7. This element is in the actinide series with an atomic number less than 100 and an atomic mass greater than 244. It is named for the “Golden State” in which it was discovered
_____ 8. This element has one valence electron and a larger atomic radius than Boron. It is in the same period as neon and has the lightest atomic mass among the metals.
Answer:
1.fluorine
3.carbon group element
5.yttrium
7.Ammonium
8Titanium
Explanation:
This is what I founded in my books. Sorry If it's wrong
Describe two applications of radioisotopes in medicine.
Answer:
Medicine
Explanation:
In nuclear medicine, tracer radioisotopes may be taken orally or be injected or inhaled into the body In radiotherapy, radioisotopes typically are employed to destroy diseased cells. Radiotherapy commonly is used to treat cancer and other conditions involving abnormal tissue growth, such as hyperthyroidism.
Help Please!!! HURRY!!!!! NO SPAM!!!!!!!!!!
3 Cu + 8HNO3 --> 3 Cu(NO3)2 + 2 NO + 4 H2O
In the above equation how many grams of water can be made when 8 grams of HNO3 are consumed?
Round your answer to the nearest tenth. If you answer is a whole number like 4, report the answer as 4.0
Use the following molar masses. If you do not use these masses, the computer will mark your answer incorrect.:
Element Molar Mass
Hydrogen 1
Nitrogen 14
Copper 63.5
Oxygen 16
Answer:
its for use full
Which statement best compares a battery and a galvanic cell? (1 point)
A battery’s source of power is a galvanic cell in which electrical energy produces a redox reaction.
A battery’s source of power is a galvanic cell in which a redox reaction produces electrical energy.
A galvanic cell’s source of power is a battery in which electrical energy produces a redox reaction.
A galvanic cell’s source of power is a battery in which a redox reaction produces electrical energy.
Answer:
A galvanic cell’s source of power is a battery in which electrical energy produces a redox reaction.
Explanation:
The best statement is a galvanic cell’s source of power is a battery in which
electrical energy produces a redox reaction.
A battery acts as a source of power for cells as it converts the chemical
energy to electric energy. The electric energy results in the excitation of
electrons in the cell.
The excited electrons give rise to redox reaction in which electron flows.
Electrons are lost or gained through oxidation and reduction by elements in
the galvanic cell.
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Which of the following is a disadvantage of using nonrenewable energy sources like fossil fuels?
O power can be intermittent
O generation of power on a large scale
O greenhouse gas emissions/pollution
Answer:
O greenhouse gas emissions/pollution
Explanation:
This is a very large disadvantage to using fossil fuels.
How many moles are in 2.91 X 10^22 atoms of He?
Answer:
0.048 moles
Explanation:
1. A cell can be seen by looking through a microscope. Seeing which of these organelles
would let you know that you are looking at a plant cell?
A. Mitochondria
B. Chloroplast
C. Cell membrane
D. Nucleus
According to the periodic trends,
Calcium has a greater atomic radius than magnesium
Answer:
nope but whats the question?
help refers to the position you should assume in cold water. what does help stand for?
Answer: HELP stands for - Heat Escape Lessening Posture.
How many Zn atoms are in Zn(CIO3)2?
O A. 1
O B. 3
O c. 6
O D. 2
The Zn atom in Zn(CIO3)2 will be 1.
A chemical element however is uniquely defined by its atoms, which are tiny pieces of substance. An atom is made up of a core nucleus and one or perhaps more electrons with negative charges that orbit it. The positively charged, comparatively hefty protons and neutrons that make up the nucleus may be present.
The given chemical formula is :
Zn(CIO3)2
The number of Zn = 1
The number of Cl atom = 2
The number of O = 6
Hence, it can be said that there are 1 atom of Zn present in the Zn(CIO3)2 .
Therefore, the correct answer will be option (A)
To know more about atoms
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elements in the s and p blocks of the periodic table are called
Answer:
Representative elements
Explanation:
What is the difference between ounces and fluid ounces?
Answer:
Ounce measures weight, Fluid ounce measures volume
Explanation:
16 ounces = 1 pound (weight)
16 fluid ounces = 1 pint (volume)
Remember difference between volume and weight, which is that volume is the amount of space a object takes up, while weight is how heavy a object is.
Hope this helps.
Which is an empirical formula?
1.
H202
2.
H20
3.
C₂H₂
4.
C3H6
Answer:
c2h2 is it..........
Explanation:
lol
Which worker participates in the primary sector of an economy?
O A. A factory worker
O B. A lawyer
O C. An accountant
D. A farmer
The answer is A. factory worker
Select the correct location on the image.
In which area of this volcanic site is the most iron ore likely to be found?
A,B,C, or D?
Answer:
its b because when the lava comes out it would run against the sides and since b is on the side it would run onto b
Explanation:
A wooden cube has a mass of 4.5 grams and a volume of 4 cm3. Will it sink or float in water
Answer:
The wooden cube would sink in water.
Explanation:
p = density
m = mass
V = volume
First, make a chart like such, with the mass and volume
m = 4.5/g
V= 4cm/3
Second, divide amongst the largest number
= p = 1.125 g/cm3
Finally, find the cubed root (3√)
3√V = 1.5874010519682
Now, knowing that the density of the cube is 1.58~ we can predict it will sink
1 g/cm3 = float
Above 1 g/cm3 = sink
Our output:
1.58 g/cm3
1. Water that contains hydrogen -2 atoms is called
Answer:
deuterium oxide
Not all reagents work well for all halides. Which reagents are best to identify the following elements?
Cl: a
Br:
I:
a. AgNO3
b. starch
C. NH3
d. Starch and Naoci
e. NaOCL
f. Ca(NO3)2
Answer:
Br is AgNO3 and I is Starch and NaOCI. I am not sure what CI is. I guessed NH3 and that was wrong.
Explanation:
Answer:
Cl: Starch
Br: AgNO3
I: Starch and Naoci
Explanation:
List 3 things you notice about the ingredients and recipes
Answer:
refer to attachment OK sir
¿Qué condición conduce a una tasa de envejecimiento más lenta?
rocas porosas
climas fríos
minerales duros
altas temperaturas
Answer:
Las altas temperaturas es la respuesta correcta.
Explanation:
¡Que tenga un buen día!
What bond type is expected between C & H given that their electronegativity difference is 0.4?
Answer:
Since they have an electronegativity difference of 0.4 then they will form a Covalent Bond.
Weathering notes
The breaking down of ________ into smaller_________ next to each other. Weathering forms ____________
Mechanical weather.
_____________ breaking of rock without any ____________ in the _____________ composition of the rock
Ice ___________
_______________
_______________
_____________.
(Force)
Chemical weathering
The breaking down of rock into smaller _____________ because of __________ changes within the rock
______________
_____________
__________________
_____________
(Acid)
Answer:
i have no idea this is to hard for me ;(4
Explanation:
What NaCl concentration results when 294 mL of a 0.750 M NaCl solution is mixed with 637 mL of a 0.430 M NaCl solution
Answer:
0.531 mole/L = 0.531M
Explanation:
What NaCl concentration results when 294 mL of a 0.750 M NaCl solution is mixed with 637 mL of a 0.430 M NaCl solution?
294 ml X 0.75 moles/1000ml=0,294X0.750 = 0.2205 moles
637 ml X 0.430 moles/1000ml = 0.637 X 0.430= 0.2739 moles
0.2205 + 0.2739 = 0.4944 moles
this is distributed over 294 ml + 637 ml= 931ml
with a concentration of 0.4944 moles/0.931L or 0.531 mole/L = 0.531M
The experimental apparatus represented above is used to demonstrate the rates at which gases diffuse. When the cotton balls are placed in the ends of a tube at the same time, the gases diffuse from each end and meet somewhere in between, where they react to form a white solid. Which of the following combinations will produce a solid closest to the center of the tube?
a. HCI and CH3NH2
b. HCl and NH3
c. HBr and CH3NH2
d. HBr and NH3
Use the galvanic cell reaction to answer the question.
2Cr(s) + 3Cu2+(aq) → 2Cr3+(aq) + 3Cu(s)
Which half reaction occurs at the cathode? (1 point)
3Cu2+(aq) + 6e– → 3Cu(s)
2Cr(s) → 2Cr3+(aq) + 3e–
3Cu2+(aq) + 2e– → 3Cu(s)
2Cr(s) → 2Cr3+(aq) + 6e–
Answer:
C, 3Cu2+(aq) + 2e– → 3Cu(s)
F= G = mass(1) x mass(2)
6.67 x 10x-11
Answer:
6.67 x 10 -11 N-m2/kg2
Explanation:
Gravity Formula Questions: 1) What is the gravitational force acting upon two objects of masses 15 g and 15 kg, that are 11 m apart? Answer: the gravitational constant, G, is defined as 6.67 x 10 -11 N-m2/kg2 ; m1 = 15 g = 0.015 kg; m2 = 15 kg; r = 11m.
Which of the following would have the largest atomic radius?
S2-
O
S
O2-
Answer:
S2-
Explanation:
Using the table attached, you can see that the trend shows that S has a larger atomic radius than O.
S2− has a larger radius than the neutral S atom. When an atom gains one or more electrons, forming an anion, the added electron(s) increase the shielding effect between the outermost electrons and the atomic nucleus.
ANSWER ASAP PLEASE
When it is very hot in his room, Stuart tries to make it cooler by opening both the top and the bottom of his window. Cooler air comes in the bottom and warm air goes out through the top. Heat energy was transferred by which of the following processes
Question 21 options:
radiation
convection
conduction
evaporation
Answer:
the answer is convection, convection is heat rising and the cool air sinking
Answer:
the answer is convection, convection is heat rising and the cool air sinking
Explanation:
what is the latin name of chromium??? Help please
Answer:
Latin: Chromium; Czech: Chrom; Croatian: Krom; French: Chrome; German: Chrom - r; Italian: Cromo; Norwegian: Krom; Portuguese: Crômio; Russian: Хром; Spanish: Cromo; Swedish: Krom.
Explanation:
