Answer:
atomic watch
Explanation:
it is used for the measurement of time.
I need uses of acid-base indicators
Answer:
to indicate the presence of acid or base in a body
The diagram represents an atom of an element key
e = electron = 4
n = neutron = 5
p = proton = 4
Which symbol gives this information?
What is true about the light shown above?
A. All of the light is refracted
B. All of the light is reflected
C. Some of the light is refracted, and some of the light is reflected
D. None of the light is refracted or reflected
Answer:
The answer is D. None of the light is refracted or reflected.
Explanation:
Just trust :)
• Describe evidence that convection cycles/cells exist within the Earth's core and how they connect to
sea floor spreading and subductio zones
Explanation:
Seafloor spreading and other tectonic activity processes are the result of mantle convection .Mantle conversion is the slow churning motion of Earth’s mantle convection carry heat from the lower mantle and core to lithosphere
If, it helps you than mark me as brainlistQuestion 1 (2 points)
Which option can be classified as a pure substance?
Question 1 options:
heterogenous mixture
solution
homogenous mixture
compound
Question 2 (2 points)
Law of conservation of mass states that:
Question 2 options:
matter is destroyed
matter does not change
matter is neither created nor destroyed
matter is created
Question 3 (2 points)
What is a property of bases?
Question 3 options:
all of the above
Sour taste
Slippery touch
Ability to form hydronium ions+
Question 4 (2 points)
Which property do solutions with low pH values have?
What does it mean to have a neutral pH? - Aseptic Health
Question 4 options:
have a -OH group
feels slippery
turns litmus paper blue
tastes sour
Question 5 (2 points)
How do the products of chemical reactions compare to their reactants?
Question 5 options:
The products often have completely different properties than the reactants.
The products are usually more toxic than the reactants.
The products usuallyhave more mass than the reactants.
The products usually have more atoms than the reactants.
Question 6 (2 points)
Which of the following is an example of a physical change?
Question 6 options:
Water freezing into ice.
A piece of wood burning.
A toy car rusting.
Zinc producing hydrogen gas when mixed with water.
Question 7 (2 points)
What might happen if you mixed a strong acid with an equally strong base?
Question 7 options:
You would see an explosive chemical reaction.
The base would destroy the acid.
You'd wind up with a pH-neutral salt and water.
The acid would destroy the base.
Question 8 (2 points)
In the equation shown, what are the reactants?
2H2+O2àH2O
Question 8 options:
Hydrogen and oxygen molecules (2H2 and O2 )
Ice crystals
Hydrogen atoms (H)
Water molecules (H2O)
Question 9 (2 points)
Which phrase most accurately describes a chemical change?
Question 9 options:
A change in form
A change in taste
A change on the molecular level
A change in appearance
Question 10 (2 points)
What does it mean when there is a physical change?
Question 10 options:
A new substance has been formed.
Matter has changed from one substance into a new substance.
Matter has changed size, shape or form
Matter has changed on the molecular level.
help pls ill give 20 points!
Answer:
1) Compound
2) Matter is neither created nor destroyed
3) All of the above
4) Turns litmus paper blue
5) The products often have completely different properties than the reactants.
6) Water freezing into ice
7) You'd wind up with a pH-neutral salt and water.
8) Hydrogen and oxygen molecules (2H2 and O2 )
9) A change on the molecular level
10) Matter has changed size, shape or form
Answer:
compoundmatter is neither created nor destroyedSlippery touchtastes sourThe products often have completely different properties than the reactants. Water freezing into ice. You'd wind up with a pH-neutral salt and water. Hydrogen and oxygen molecules (2H2 and O2 ) A change on the molecular level Matter has changed size, shape or formExplanation:
Matt is conducting an experiment where he compares the properties of water and
lemonade. The first stage of the experiment is focusing only on the physical properties of?
Answer:
sitric acid from lemon
Explanation:
there
The first stage of the experiment is focusing only on the physical properties of acidic property.
What is physical property?A physical property would be any quantifiable attribute whose value describes the condition of a physical system. Changes in a system's physical attributes are able to characterize its transitions between brief states. Physical attributes are sometimes known as observables.
Physical characteristics are frequently classified as intense or extensive. An intense property is independent of the system's size or extent, as well as the amount of material in the item, whereas an extended property has an additive link. The first stage of the experiment is focusing only on the physical properties of acidic property.
Therefore, the first stage of the experiment is focusing only on the physical properties of acidic property.
To learn more about physical property, here:
https://brainly.com/question/29775585
#SPJ2
What is friction? A _______ between an object and the _______ it's moving over.
Answer:
A force between an object and the surface it's moving over.
Explanation:
hope this helps. . . <3
good luck! uωu
What happens when you drop an egg on the ground from about 6 ft high?
Answer:
Gravity causes an object to fall to Earth when dropped. When the egg hits the ground with a given force, the ground exerts the same force back on the egg. If too large a force is delivered to the egg shell, the egg will crack.
Explanation:
what happens when ice changes to water the link up of the atoms
Answer:
Removing heat causes water (a liquid) to freeze to form ice (a solid). When water changes to a solid or a gas, we say it changes to a different state of matter. ... This causes the hydrogen atoms in one water molecule to be attracted to the oxygen atom in another water molecule.
Explanation:
Convert 4.0 moles of krypton into liters of krypton.
Answer:
4.0 moles of krypton converts to 89.6L.
Explanation:
To convert moles to liters, remember that at standard temperature and pressure (STP), 1 mole is equal to 22.4 liters. Multiply your mole value - in this case, 4.0 - by the molar volume constant, 22.4L, to convert moles into liters. 4.0 x 22.4 is equal to 89.6, thus your answer is 89.6L.
We can check this by dividing 89.6 by 4.0, which will give us the molar volume constant 22.4L, proving that this answer is correct.
which of the following is most acidic oxide?
a.Na2O
b.Al2O3
c.P2O5
d.SO3
And why it is most acidic oxide?
-i effect required here
Let's see which oxide shows more -i effect
Na-Group 1 Al-Group 15P-Group 15S -Group 16P lies below Al
And -i effect increases down the group so acidity increases
P_2O_5 is more acidicWhich two statements are true for both compounds and mixtures?
A. They are made up of more than one type of atom.
B. Their particles all have the same chemical formula.
C. They can be separated into two or more elements.
D. Their particles are held together by chemical bonds.
Answer:
B and C
Explanation:
A. Their particles are held together by chemical bonds.
This option is incorrect for both compounds and mixtures. It is only true for Compounds.
B. They are made up of more than one type of atom.
This is correct. Both compounds and mixtures consists of different atoms of elements.
C. They can be separated into two or more elements.
This option is correct. Compounds are broken down into elements through chemical means.
D. Their particles all have the same chemical formula.
This is wrong. Mixtures do not have a chemical formula
Charlotte has some copper sulfate solution. She wants solid copper sulfate. Which technique should she use?
Answer:
She should use the crystalization technique
Explanation:
First, the copper sulfate solution should be filtered to clear any impurities.
By heating the solution of copper sulfate on a china dish, the excess water in the solution evaporates and leaves behind a saturated solution of copper sulfate.
Upon cooling this saturated copper sulfate solution, crystals of solid copper sulfate will be formed on the china dish.
In solid form, copper sulfate appears in triclinic-shaped crystals.
Wines are produced from fermentation of crushed grapes. What causes the either white or red color of wine
Answer:
The cause of the color "white" in wine is because the grape's skin is removed before fermentation.
The cause of the color "red" in wine is because the grape's skin is still intact while fermentation
what is solubility?
Answer:
the ability to be dissolved, especially in water.
Explanation:
Which statement best describes the difference between a substance with a pH of 2.0 versus a substance with a pH of 4.0?
a
(1 point)
O The substance with a pH of 2.0 would have 100 times as many hydrogen ions per volume of water.
o The substance with a pH of 4.0 would have 100 times as many hydrogen ions per volume of water.
O The substance with a pH of 4.0 would have twice as many hydrogen ions per volume of water.
O The substance with a pH of 2.0 would have twice as many hydrogen ions per volume of water.
Answer:
The answer is the first one.
Explanation:
The lower a pH level the higher the the number hydrogen ions present in the acid's container.
ph = - log(H)
4 = - log(H)
- 4 = log(h)
10^-4 = H+
1 * 10^-4 = H +
ph = - log(H)
ph = 2
- 2 = log(H)
10^-2 = H
1*10^-2 = h
Something the power - 2 is 100 times greater than something with the power of -4
Answer:
the guy above is correct
Explanation:
Rocks and fossils leave evidence of the conditions that were present when they formed.
true of false
Did you know that
1-7=0
Answer:
No I didn’t
Explanation:
A watch loses 0.15 sec/min, how many seconds are lost in 24 hours?
Answer:
0.15 sec/min = 9 sec/hour
9*24 = 216 seconds = 3.6 minutes
Explanation:
Answer:
216 Seconds
Explanation:
If every minute is 60 seconds than 60 multiplied by .15 is 9 Seconds Lost.
If every hour is 60 minutes compared to what we know than 24 hours multiplied by 60 is 1440 minutes.
Do the same math as before: 1440 x .15 = 216 Seconds
help<3
If a solid object is taken from Earth far into space, which of the following measurements of the object
will change the most?
A. density
B. mass
C. volume
D. weight
Answer:
D. weight
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If a solid object is taken from Earth far into space, which of the following measurements of the object will change the most?
A. density
B. mass
C. volume
D. weight
Answer:-option D. weight
Explanation:-Because the gravity of the planet/object changes, the weight of the object changes when you move it away from the earth or place it on another planet.
However, the mass of the object remains the same regardless of whether it is on Earth or outer space.
Compare the box on the left containing the reactants in a chemical reactions. Which box on the right is the correctly represents the products according to the Law of Conservation of mass?
A) A.
B) B.
C) C.
D) D.
Answer:
d is the right answer
please mark me brainlist
Fe(s) + CuSO4(aq) —> FeSO4(aq) + Cu(s)
This chemical equation represents a __ reaction.
A. synthesis
B. decomposition
C. neutralization
D. single replacement
Answer:
D
Explanation:
single replacement....iron combined with tetraoxosulphate (VI)
Chlorine and oxygen form many different compounds, including CIO, and Cl2O3. How do the names of these compounds differentiate one chlorine oxide from another?
Answer:
We can mix two compounds and create a third that bears little resemblance to its parents. For instance, by mixing two parts of hydrogen gas with one of oxygen - liquid water is formed. We should not be misled by the fact that chlorine and chlorine dioxide share a word in common. The chemistries of the two compounds are completely different.
Chlorine and chlorine dioxide are both oxidizing agents (electron receivers). However, chlorine has the capacity to take in two electrons, whereas chlorine dioxide can absorb five. This means that mole for mole, ClO2 is 2.6 times more effective than chlorine.
If equal, if not greater importance is the fact that chlorine dioxide will not react with many organic compounds, and as a result, ClO2 does not produce environmentally dangerous chlorinated organics. For example; aromatic compounds have carbon atoms arranged in rings and they may have other atoms, such as chlorine, attached to these rings, to form a chlorinated aromatic - a highly toxic compound that persists in the environment long after it is produced.
Chlorine dioxide's behaviour as an oxidizing agent is quite dissimilar. Like ozone, the predominant oxidation reaction mechanism for chlorine dioxide proceeds through a process known as free radical electrophilic (i.e. electron-attracting) abstraction rather than by oxidative substitution or addition (as in chlorinating agents such as chlorine or hypochlorite). This means that chlorinated organic compounds such as THMs and HAAs are not produced as a result of disinfection using chlorine dioxide
Hope this helps, have a nice day! :D
The way that the names of these compounds show that the Chlorine oxides are different is by making reference to the number of individual molecules in the compound.
How are the chlorine oxides differentiated?The number of chlorine and oxygen molecules in each compound are used to name the compounds which ensures that they are differentiated.
ClO₂ is called "Chlorine Dioxide" which shows that there are two Oxygen atoms.
Cl₂O₃ is called "Dichlorine Trioxide" which shows that there are two Chlorine molecules and 3 Oxygen molecules.
Find out more on Chlorine oxides at https://brainly.com/question/25937152.
EASY QUESTION (PLEASE HELP THE INTERNET ISN'T SUCH A BIG HELP RIGHT NOW)
Things microscopes have helped scientists discover about cells.
Answer:
Again, Microscopes discovered a lot of things in biology like the prokaryotic cells, Bacteria and Archaea, aswell as parts of an organelle/cell.
do you think organisms who live in the artic would survive in the desert? Do you think organisms in the desert would survive in the artic? Why or why not?
Answer:
I'd say probably not
Explanation:
Organisms have evolved to survive and thrive in particular environmental conditions, specifically focusing on food supply, temperature, terrain, etc.. Therefore, desert animals would not be equipped with the insulation to survive in cold climates like the artic, and would freeze to death, and artic animals would most likely die from heat exhaustion in the desert. Additionally, fish, which is a main food source for articles animals, are not available in the desert, and it's the same case for desert animals in the artic. Finally, those organisms' enzymes and proteins, which make up their being and are the reason they can function, are only optimal in the temperature range in which they normally live; therefore, switching to such drastically different climate would result in their enzymes denaturing and their cell and eventual organism death.
I NEED HELP AYEEYYEYWY
how is the chemical reaction for iron (II) + carbonate
iron (III) + carbonate
and iron (III) and (II) + sulfate
Answer:FeCO3 + 2HNO3 > Fe(NO3)2 (salt) + H20 (water) + CO2(carbon dioxide)
Explanation:
Carbonate-with-acid reactions form these three things
JWhat type of evidence is gathering information through your senses or using scientific tools?
Predictions
Results
Scientific research
Observations
Una pieza cúbica de 34 mm de arista tiene una masa de 310,5 g. Determina su densidad, expresada en kg/m3
Answer:
Explanation:
What products would you expect from the reaction of ammonia and sulfuric acid in aqueous solution
Answer:
(NH4)2SO4
Explanation:
2NH3(aq) + H2SO4 (aq) ---> (NH4)2SO4(aq)
Ammonia reacts with sulfuric acid to give the fertilizer ammonium sulfate.
BALANCED WORD EQUATION Aluminium carbonate + hydrochloric acid -->
Answer: 2Al+6HCl→2AlCl3+3H22Al+6HCl → 2AlCl3 + 3H2
Explanation: