Answer:
Because a glass window is harder than a fingernail, a glass window would have a higher number on Mohs hardness scale
Explanation:
Explain the term oxidising and reducing agent with examples of each.
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Give proper answer!
Required Answer:-
★Oxidization Reaction :It is a reaction in which a substance gains Oxygen and looses Hydrogen.
★Reduction Reaction :It is a reaction in which a substance loses Oxygen and gains Hydrogen.
_____________________
Oxidizing agent gains electrons whereas Reducing agent loses electrons in a given reaction.
----------------------------------
Example :
In this reaction,
MnO4 + SO3 ----> Mn + SO4
→S is the reducing agent
Mn is the oxidizing agent.
------------------------------------
Oxidising - When you combine oxygen with another element.
Reducing agent - When an element loses electrons in a redox chemical reaction.
Explanation:
Example - Tina combined iron with oxygen and it rusted.
Reducing agent - alkali as an example
Best of Luck!
How many total atoms are in 4K2CO3?
Answer:
there are 8 total atoms: two hydrogen (H) atoms, two sulfur atoms (S), and four oxygen (O) atoms.
Explanation:
Happy Holidays
The number of atoms of any element in the given chemical formula is the number that is written on the foot of the symbol of that element. Thus the total number of atoms in given compound is 18.
What is atom?Atom is the smallest particle of any matter. Atom combines to form element and element combine to form molecule or compound.
Atom consists of electron, proton and neutron. The total mass of atom is inside the nucleus. Inside the nucleus proton and neutron is there. So calculate mass of an atom, total mass of all protons is added to the total mass of neutron. Electrons revolve around the nucleus.
In the nucleus, proton and neutron are present. Electron has -1 charge while proton has +1 charge. Neutron is neutral that is it has no charge. So overall the charge of nucleus is due to only proton, not by neutron
There are 18 total atoms in given compound: four carbon (C) atoms, eight potassium atoms (K), and six oxygen (O) atoms.
Thus the total number of atoms in given compound is 18.
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rannnnnnnnndy are u there
Answer:
i-um yes. i'm randy, totally not an imposter.
Explanation:
(BrainPop Will give brainliest)
Based on the information from the movie, what can you conclude about the most common chemical compound on earth?
A) It's oxygen incorrect answer
B) It's hydrogen gas incorrect answer
C) It's carbon dioxide incorrect answer
D) It's water
Answer: What movie? The one where i ate chicken. (I eat chicken at all times)
Explanation: Its oxygen anyway
Two or more than two atoms with different physical or chemical properties can not combine together to form an element. Oxygen is the most common chemical compound on earth. The correct option is option A.
What is element?Element generally consist of atoms or we can atoms combine to form element. Atoms of an element is always same, means all the properties of all atoms of one type of element is same.
Oxygen and water are the most abundant on earth. Carbon dioxide and hydrogen gas are the rarest. Out of Oxygen and water, oxygen is the most abundant gas on the earth. Carbon dioxide are mostly released on combustion. two third of earth surface is covered by water.
Therefore, oxygen is the most common chemical compound on earth. The correct option is option A.
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A _______ is developed through the scientific method and it can be modified or improved upo.it may be represented by a model. As seen here three different models were used to represent atomic structure as ideas changed over time.
A)Hypothesis
B)Law
C)Prediction
D)Theory
PLEASE HELPPPP!!!!!!! (for science)
Nora notices water droplets on the grass in the morning. It did not rain during the night. Which statement is true about this change of state?
1. Mass was added to the water particles, resulting in a deposition.
2. Energy was added to the water particles, resulting in evaporation.
3. Mass was removed from the water particles, resulting in sublimation.
4. Energy was removed from the water particles, resulting in condensation.
Answer:
4
Explanation:
because morning dew is condensation
is this right ?? if not please tell me so I can change
Answer:
That is correct you smart boi :)
Explanation:
Make an observation about the average height of the beanbag for each mass dropped. How does it compare with your calculated kinetic energies for each mass? When the bottle has more mass, does the beanbag seem to travel to greater heights? Record your general observations in Table A.
Answer:
the other person is correct
Explanation:
The kinetic energy of an object is directly proportional to the mass and velocity of the object. As the mass of the bottle increases, its kinetic energy increases results in greater speed and displacement.
What is kinetic energy?Kinetic energy of an object is the energy formed by virtue of its motion. Kinetic energy is related to the mass, m and speed, v of the object as follows:
Ke = 1/2 mv²
As per this relation, the kinetic energy of an object is directly proportional to the mass and speed of the object. Thus, when an object is having higher kinetic energy it can travel more distance.
If the mass of the bottle is increased, then the kinetic energy of the bean bag increases, results in more speed which in turn increases the height that it can go ahead.
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Students are asked to correctly identify the reactants and products of this chemical reaction. Which of the following explanations is correct? A. Sam says that nitrous acid and nitric acid are the reactants; water and nitrogen dioxide are the products. B. George says that nitrogen dioxide and water are the reactants; nitrous acid and nitric acid are the products. C. Jan says that nitrogen, hydrogen and water are the reactants; oxygen and acid are the products. D. Erin says that nitrogen dioxide and water are the reactants; nitrogen is the product.
Answer:b
Explanation:
He is correct
Answer:
B. George says that nitrogen dioxide and water are the reactants; nitrous acid and nitric acid are the products.
all minerals on the mohs hardness scale are hard enough to scratch a piece of glass is it true or false
PLEASE I NEED HELP
science
The force of gravity on Planet Y is 5.3 m/s2. The force of gravity on Planet Z is 6.2 m/s2. A 10 kg object would: weigh more on Planet Y than on Planet Z weigh less on Planet Y than on Planet Z weigh the same on Planet Y as on Planet Z
Answer:
every thing would weigh less on planet y because weight = m(mass)g(gravity) and planet y is 5.3x10=53 and planet z is 6.2x10=62. 62 is greater than 53 so everything on planet y would weigh less than everything on planet z so the answer is b
Explanation:
What units would you use to measure a virus?
1.Nanometers
2.micrometers
3.millimeters
Answer:
(B Nanometers
Explanation:
Most viruses vary in diameter from 20 nanometres (nm; 0.0000008 inch) to 250–400 nm; the largest, however, measure about 500 nm in diameter and are about 700–1,000 nm in length. Only the largest and most complex viruses can be seen under the light microscope at the highest resolution.
Animals respond to threats in their environment by attacking or escaping. Either response is the result, mostly, of interactions between -
Answer:
escaping
Explanation:
List the three subatomic particles. Give the relative masses and charges of each.Identify the type of bond(s) present in each of the following substances:
NaCl
C2H6
MgO
Ag6
N2O4
F2
Fe5
CO2
Answer:
The electron is subatomic particle that revolve around outside the nucleus and has negligible mass. It has a negative charge.
relative charge = -1
Relative mass = 1.1836
It was discovered by j. j. Thomson in 1897 during the study of cathode ray properties.
He constructed the glass tube and create vacuum in it. He applied electric current between electrodes. He noticed that a ray of particles coming from cathode to wards positively charged anode. This ray was cathode ray.
Properties of cathode ray:
The ray is travel in straight line.
The cathode ray is independent of composition of cathode.
When electric field is applied cathode ray is deflected towards the positively charged plate.
Hence it was consist of negatively charged particles.
While neutron and proton are present inside the nucleus. Proton has positive charge while neutron is electrically neutral. Proton is discovered by Rutherford while neutron is discovered by James Chadwick in 1932.
Relative mass of proton= 1
Relative mass of neutron = 1
Relative mass of proton = +1
Relative charge of neutron = 0
The number of electron or number of protons are called atomic number while mass number of an atom is sum of protons and neutrons. The umber of protons and electrons are always equal to make the atom electrically neutral.
Explanation:
The state of matter in which particles are arranged in either a crystalline or an amorphous form is ,
Answer:
a solid in which state of matter are particles packed tightly together in fixed positions.
Explanation:
hope this helps
The state of matter in which particles are arranged in either a crystalline or an amorphous form is solid. In solid state, particles are closely packed with stronger intermolecular forces.
What are solids?There are three states for matter namely solids, liquid and gas. In solid state, particles are closely packed and have strong intermolecular force. In liquid state, particles have small space to move apart and they are free to flow.
In gaseous state particles are far apart with least intermolecular forces and they are free to move everywhere. There are are two types of solids namely crystalline and amorphous solids.
Crystalline solids have perfect ordered structure with definite composition and sharp edges. Amorphous solids have disordered structure with isotropic features.
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A latex balloon will adjust to maintain the same pressure. If the balloon is filled with 19.4 L of helium initially at 25.2 degrees Celcius, what would the volume be if the temperature adjusted to 5.4 degrees Celcius?
Answer:
V₂ =18.11 L
Explanation:
Given data:
Initial volume = 19.4 L
Initial temperature = 25.2°C (25.2+273 =298.2 K)
Final volume = ?
Final temperature = 5.4°C ( 5.4+273 =278.4K)
Solution:
The given problem will be solve through the Charles Law.
According to this law, The volume of given amount of a gas is directly proportional to its temperature at constant number of moles and pressure.
Mathematical expression:
V₁/T₁ = V₂/T₂
V₁ = Initial volume
T₁ = Initial temperature
V₂ = Final volume
T₂ = Final temperature
Now we will put the values in formula.
V₁/T₁ = V₂/T₂
V₂ = V₁T₂/T₁
V₂ = 19.4 L × 278.4 K / 298.2 k
V₂ = 5400.96 L.K / 298.2 K
V₂ =18.11 L
hi, I'm lyo, a brazilian chemistry teacher ...
step by step :
The exercise can be solved using Charles' Law, which says: "that the amount of a gas in its volume provides the maximum number of moles in the pressure acquired"
The volume (mathematically speaking), is the amount of space occupies some type of body, in exercise it asks for the volume of the temperature adjusted to 5.4 ° C, so we have to:
V₁ / T₁ = V₂ / T₂ → the initial volume divided by the initial temperature, is equal to the final volume raised to (2), divided by the final temperature raised to (2) ...
Agora calculamos:
[tex]V_{2} = \frac{ V_{1}T_{2}}{T_{1} } \\V_{2} = \frac{19,4 L * 278,4\; K }{298,2\; k} \\V_{2} = \frac{5400,96\; L\:K}{ 298,2\: K}\\ V_{2} = 18\: L[/tex]
the volume will then be 18 liters
[tex]BRAINLY\; WE\; STUDY \;TOGETHER[/tex]
Two internal sources of energy for Earth are
A.rotational energy.
B.solar energy
C.geothermal energy
What is it called when a girl is romantically and sexually attracted to women but find men attractive?
(what is the name of the sexuality?)
Answer:
i think is biromantic, homosexual woman is romantically attracted to people of multiple genders, but is only sexually attracted to women. A biromantic, homosexual man is romantically attracted to people of multiple genders, but is only sexually attracted to men.
Explanation:
i hope this help :/
Answer:
bisexual, or leaning towards fully homosexual
Explanation:
if a girl has zero romantic nor sexual attraction toward men, then that would be phrased as homosexual. but if there is some sort of attraction at all, i i️ would consider that as bisexual. whatever term you feel most comfortable using, you should be confident in!! you are valid, hope this helps :)
Which of these minerals would most likely be valued as a gem and used in jewelry?
olivine, a green or gray mineral with a hardness rating of 6.5
gypsum, a pink or white mineral with a hardness rating of 2
galena, a metallic silver mineral with a hardness rating of 2.5
science
Answer:
b? I hope this helps! Let me know :)
Explanation:
How will the concentration of H+ and OH− ions change when a substance with a pH 11.4 is added to water?
A) Both H+ and OH− will increase
B) Both H+ and OH− will decrease
C) H+ will increase and OH− will decrease
D) H+ will decrease and OH− will increase
Answer:
option d is the answer
hope it helps
Answer:
The answer would be D.
:D
What is the softest mineral on the Mohs Hardness Scale?
quartz
apatite
talc
science
The softest mineral on the Mohs Hardness Scale would C.talc
What is talc ?It has a hardness of 1 on the Mohs scale, which means that it can be scratched by a fingernail. Talc is a soft, white mineral that is often used in cosmetics and other products.
The Mohs Hardness Scale is a scale used to measure the hardness of minerals. It is a qualitative scale, meaning that it does not give a precise measure of hardness. However, it is a useful way to compare the hardness of different minerals.
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What do climatologist study about fossil seashells in rock sediments to learn about climate
Answer:
What information can climatologists learn from fossils? Fossils of plants and animals can show adaptations that organisms had for a particular type of climate that existed millions of years ago. Climatologists look at many pieces of evidence to study climate change. These pieces of evidence can support each other.
Explanation:
,.,
One type of bacteria reproduces once every 60 minutes. If there are 2 bacterial cells to begin with, then after 4 hours there will be a total of _____ bacterial cells.
Answer:
96
Explanation:
A crest is created when the genes that work to produce feather growth around the neck cause
A.the normal feathers to fail to grow creating a blank area that fails in with downy feathers.
B.the feathers to twist as they grow creating the fluffy crest.
C.the feathers to grow under the skin producing a lumpy ridge called a crest.
D.the feathers to grow backwards pushing upward instead of smoothly lying down.
PLEASE HELP ME!!!!!!!!
Answereather diversity is striking in many aspects. Although the development of feather has been studied for decades, genetic and genomic studies of feather diversity have begun only recently. Many questions remain to be answered by multidisciplinary approaches. In this review, we discuss three levels of feather diversity: Feather morphotypes, intraspecific variations, and interspecific variations. We summarize recent studies of feather evolution in terms of genetics, genomics, and developmental biology and provide perspectives for future research. Specifically, this review includes the following topics: 1) Diversity of feather morphotype; 2) feather diversity among different breeds of domesticated birds, including variations in pigmentation pattern, in feather length or regional identity, in feather orientation, in feather distribution, and in feather structure; and 3) diversity of feathers among avian species, including plumage color and morph differences between species and the regulatory differences in downy feather development between altricial and precocial birds. Finally, we discussed future research directions.
Keywords: feather, skin appendage, genetics, genomics, development, evolution
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Explanation:
What are the two main types of luster?
4 points
metallic and nonmetallic
glassy and transparent
shiny and opaque
science
Compounds and mixtures are both types of substances that contain different types of atoms. Alena is given a sample of material that she knows contains both Calcium and Iodine atoms. How will Alena be able to determine if this material is a compound or a mixture?
pls hurry!
does temperature stay the same when heat energy increases?
Answer:
More energy is required to raise its temperature. Therefore, temperature does not stay the same when heat energy increases.
Help me with this science
Answer:
1. Rain
2.frozen rain
3.clouds
4.when its at its freezing point which is 32 degrees Fahrenheit
5.a form of precipitation with little ice pellets
6.hail is formed when rain is carried up into cold part of the air
7.a thunderstorm
8.its basically just ice
9.It can cause bad dents in a car
10.he was a meteorologist and a photographer
Explanation:
Yvette conducted an experiment investigating the effects of temperature on chemical reaction time. She dropped an Alka Seltzer tablet in water of different temperatures and measured the time it took for the reaction to complete. She hypothesized that the Alka Seltzer tablet would react faster in warmer water. The Effect of Temperature on Chemical Reaction Rate: Water Temperature (°C), Trial 1, Trial 2, Trial 3, Trial 4:
10°C , 44, 46, 43, 44
20°C, 37, 39, 37, 37
30°C, 29, 29, 27, 28
40°C, 19, 21, 20, 20
50°C, 11, 9, 10, 27
60°C, 4, 7, 5, 7
Was Yvette’s hypothesis correct? Explain your answer. A. Which reaction time is not consistent with the rest of the data table? B. What should its value be? C. What could have caused this inconsistency? Explain your answer. Please help this is for a grade and I don't understand. If you answer all the questions, I'll give you Brainliest.
Answer:
y=mx+b 8087 78=78
Explanation:
Answer:
read it and it will tell you
Explanation:
I need it done assap
Answer:
I know the answer to the first one.
Explanation:
I believe animals need oxygen, water, and glucose.
Answer:
the first one I believe is Carbon Dioxide and the second one im unsure
Explanation: