Answer:
its called either a physical change or chemical change
Explanation:
In this reaction, how many moles of ethane (C2H6) would react with 35 moles of 02? 2C2H6 + 702 + 6H20 + 4CO2 O
A. 30 O
B.2 O
c. 10
D. 20
Answer:
C = 10
Explanation:
Given data:
Moles of O₂ = 35 mol
Moles of C₂H₆ react = ?
Solution:
Chemical equation:
2C₂H₆ + 7O₂ → 6H₂O + 4CO₂
Now we will compare the moles of O₂ with C₂H₆.
O₂ : C₂H₆
7 : 2
35 : 2/7×35 = 10 mol
Option C is correct.
Answer:
c. 10
Explanation:
a p e x , just took the quiz
If Chicago had experienced its average highest temperature
in August, which month would have had the longest day? Explain your
reasoning.
If Chicago had experienced its average highest temperature in August, the longest day remains the same and that is the 21st of June.
What is the effect of temperature on the length of the day?The effect of temperature induces the combination of more direct rays of the sunlight as the result of the tilting of the earth's hemisphere towards the sun to receive more solar energy and possess a warmer temperature.
But the temperature of a particular region also depends on the humidity and other abiotic parameters. So, if Chicago had experienced its average highest temperature in August, it does not mean that the longest day is in the month of August. It will remain, as usual, i.e 21 June.
Therefore, if Chicago experienced its average highest temperature in August, the longest day remains the same and that is the 21st of June.
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what did the Copernican revolution demonstrate?
Answer:
The Copernican Revolution was the paradigm shift from the Ptolemaic model of the heavens, which described the cosmos as having Earth stationary at the center of the universe, to the heliocentric model with the Sun at the center of the Solar System.
Explanation:
From Google
The diagram shows JJ Thomson’s experiment with a cathode ray tube.
positively charged metal plate. negatively charge metal plate
Which of the following conclusions about the particles in the cathode ray is most consistent with JJ Thomson’s experiment and observations?
The particles are positively charged.
No assumptions can be made from the experiment.
The particles are negatively charged.
The particles are neutral.
Answer:
The particles are negatively charged.
Explanation:
Electron 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.
The measurement of an object's mass is a ____.
helppp ASAP....The overall charge of a formula unit for an ionic compound ____.
Group of answer choices
A.is always zero (neutral)
B.it is always positive
C.is always negative
D. it may have any value
Answer:
onic compounds contain positively and negatively charged ions in a ratio that results in an overall charge of zero
Explanation:
Thats what I found when I looked it up but I didnt know what answer choice to pick out of that so Ill let you do it
Answer:
A. is always zero
Explanation:
In all cases the charge on the sum of the anions is equal to the charge on the sum of the cations, to give a neutral salt
What is S for ClO3, the
chlorate ion?
Answer:
The chlorate anion has the formula ClO⁻ ₃. In this case, the chlorine atom is in the +5 oxidation state. "Chlorate" can also refer to chemical compounds containing this anion; chlorates are the salts of chloric acid.
"S" typically represents the oxidation state or oxidation number of an element in a chemical compound. For the chlorate ion (ClO₃⁻), the oxidation state of chlorine (Cl) is +5.
The oxidation number, also known as the oxidation state, of an element in a chemical compound is a numerical value that indicates the electron distribution and the degree of electron loss or gain by an atom in a chemical reaction. It helps to identify the type of chemical bonding and the role of each element in the compound.
The chlorate ion (ClO₃⁻) has a chemical formula of ClO₃⁻ where:
Cl: Chlorine has an oxidation state of +5 since oxygen (O) is known to have an oxidation state of -2 and the overall charge of the ion is -1.
O: Oxygen has an oxidation state of -2.
So, the oxidation state of chlorine in the chlorate ion is +5.
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Which happens during crossing over?
Two sex cells join together and combine DNA.
Genes are exchanged between two alleles.
Genes are exchanged between two egg cells.
Chromosomes line up randomly during metaphase I.
Answer:
Chromosones line up randomly during Metaphase |
Explanation:
Answer:
answer is d
Explanation:for all you edge 2020 people :)
Ava observes that a certain species of bird follows behind a herd of cattle. The bird species primarily eats insects. The birds stay with the herd of cattle as they graze. What is a scientific hypothesis that Ava could formulate based on her observations?
Answer:
There are insects associated with the cattle herd that serve as food for Ava.
Explanation:
The most logical hypothesis to deduce from the observation would be that the cattle herd has a kind of association with insects that happen to serve as food for the birds.
Usually, the body of cattle is plagued with different species of parasitic insects which obtain their foods and shelters from the animal. These parasitic insects will definitely be a food source for insect-predating birds. Hence, it follows logically that the Ava birds lurk behind the herd of cattle scouting for insects on the body of the cattle.
Which biome would be nearest to the equator
Calculate the density of an object with a mass of 20 grams and a volume of
1000 cm3
Answer:
20/1000=0.02 denity+mass divided by volume
Which of these correctly describes a change in the state of water. a. Liquid water - melts - solid water b. Liquid water - boils - water vapor c. Solid water - condenses - liquid d. Water vapor - evaporates - liquid water
Answer:
b. Liquid water - boils - water vapor
Explanation:
a. Liquid water - melts - solid water
This is wrong; Water to Solid is freezing
b. Liquid water - boils - water vapor
This is the correct option!
c. Solid water - condenses - liquid
This is wrong; solid to liquid is melting
d. Water vapor - evaporates - liquid water
This is wrong; vapor to liquid is condensation
This toy looks like a dog and can move, but it is a robot. What characteristics are missing to make it alive?
Answer: a beating heart,emotions,pain
Explanation:
Marie notices that the current cleaner she is using on her shower is not cutting through the hard water build-up that has accumulated. She decides to purchase 3 other cleaners to see if one of them will do a better job of cutting through the stains. Marie places masking tape in the dry shower to create 5 sections for her experiment. She sprays one cleaner per section and leaves the remaining section untouched to compare her results. After 30 minutes, and without scrubbing any of the cleaner in, she records her observations. In this example, what is the dependent variable?
Answer:
CUT through the hardwater stains
Explanation:
The dependent variable in an experiment is the variable that the experimenter measures. It is the variable that responds to changes made to the independent variable.
In this experiment, Marie conducted an experiment to test which cleaner will do a better job of cutting through the stains (hard water buildup). She measures the cut through the stain, hence, the CUT is the dependent variable, which is dependent on the cleaner used.
-
Rocks found in streams can have rough edges and sharp grooves. What is the process that roughened the edges and caused the grooves
Answer:
Metamorphism
Explanation:
Rocks found in streams can have rough edges and sharp grooves. Metamorphism roughened the edges and caused the grooves.
What is rock?Rock is a naturally occurring mineral aggregate that is cohesive and composed of one or even more minerals. These aggregates often take the shape of recognisable and mappable volumes and are the fundamental building block of the solid Earth.
Igneous rocks are the ones that develop from magma, a liquid mixture of minerals that form rocks as well as frequently volatile substances like gases and steam. Igneous rocks are created at high temperatures because the minerals that make up its components are crystallized form molten material. Rocks found in streams can have rough edges and sharp grooves. Metamorphism roughened the edges and caused the grooves.
Therefore, metamorphism roughened the edges and caused the grooves.
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What particle is emitted during the following transmutation:
6729Cu→6730Zn+
____?
A.beta particle,
0−1e
B.
positron,
01e
C.alpha particle,
42He
D.gamma particle,
00γ
Answer:
A = ₋₁⁰e
Explanation:
Alpha beta and gamma radiations are the examples of ionizing radiations. When an atom is an excited state and having high energy, the atom is in unstable state. The excess of energy is released by the atom to get the stability. The released energy is in the form of radiations which may include alpha, beta, gamma, X-ray etc.
Beta radiations:
Beta radiations are result from the beta decay in which electron is ejected. The neutron inside of the nucleus converted into the proton an thus emit the electron which is called β particle.
The mass of beta particle is smaller than the alpha particles.
They can travel in air in few meter distance.
These radiations can penetrate into the human skin.
The sheet of aluminum is used to block the beta radiation
⁶⁷₂₉Cu → ⁶⁷₃₀Zn + ⁰₋₁e
The beta radiations are emitted in this reaction. The one electron is ejected and neutron is converted into proton.
Answer:
A. beta particle,
0−1e
Explanation:
i just finished mine and it was correct
Identify arrows pointing to structures containing pi bonds.
The arrows pointing to the structures containing pi bonds can be seen in the image attached below. From the assumed example Butan-1,3-diene , there are two pi bonds.
A bond is an attractive force designated by a dash (---) that holds atoms or ions mutually in a chemical bonding.
Covalent bonds exist in organic chemistry and they are of two types:
sigma bond σ -bondpi bond π-bondThe sigma bond (σ) exists as a single bond that occurs by the overlapping of an s-s atomic orbital or s-p atomic orbital. They can be seen in unsaturated straight chains such as alkane.
The pi bond (π) exists as a double bond or a triple bond that occurs by the overlapping of two unhybridized p-orbitals.
Since the diagram is not given, we use Butan-1,3-diene as an example of the required structure.
From the structure which is attached in the diagram below, we can see that there are two double bonds indicating the presence of pi-bonds.
Therefore, we can conclude that from the assumed example Butan-1,3-diene, there are two pi bonds.
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a wave has a frequency of 50Hz and a speed of 25m/s. What is the wavelength??
Answer:500m/s
Explanation:
A hot air balloon traveled 3.5 at 15 m/hr. What is its distance traveled
Answer:
52.2
Explanation:
The formula for distance is speed * time. Just multiply the time and speed together...
3.5 * 15 = 52.2
Therefore, went 52.2. I'm sorry but I don't know what the units will be (probably miles), I hope this helps, and I apologize if it's wrong.
Answer: 52.5
Explanation:
True or false. The human ear drum transfers sound waves into vibrations and into the inner ear.
The human ear drum transfers sound waves into vibrations and into the inner ear. This statement is true.
What is sound wave ?A sound wave is the pattern of disturbance caused by the movement of energy as it propagates away from the source of the sound through a medium. Sound waves are produced by object vibrations and pressure waves, such as a ringing cellphone.
It gathers sound waves and directs them to the ear canal (external auditory meatus), where they are amplified. The sound waves then travel to the eardrum, also known as the tympanic membrane, which is a flexible, oval membrane at the end of the ear canal. The eardrum vibrates as a result of sound waves.
These vibrations are transmitted by the ear drum to the three tiny bones in the middle ear known as the malleus, incus, and stapes. The middle ear bones amplify, or increase, the sound.
Thus,The human ear drum transfers sound waves into vibrations and into the inner ear.
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What is the formula for beryllium cyanide?
BeCN2
Be(CN)2
BeCN
Be2CN
Answer:
B
Explanation:
I think tha one is more used because it's more reasonable
How many molecules are in 25.08 grams of NH3?
how many total electrons can the D orbitals hold
Answer:
10 electrons
Explanation:
The d sublevel has 5 orbitals, so can contain 10 electrons max. And the 4 sublevel has 7 orbitals, so can contain 14 electrons max. In the picture below, the orbitals are represented by the boxes. You can put two electrons in each box.
Hope it helps!
Answer:
10
Explanation:
Yes
Q: water is boiled and steam is produced. this is a physical change because the water particles A: a. have turned into something new b. are still water particles c. have reacted with each other d. have been destroyed
Explanation:
The appearance of the water has changed because it has gone from a liquid state to a gas state. This is a physical change because the water particles are still water particles and have not changed their identity.
please answer I will give brainiest to who helps. On the morning of a birthday party, a balloon is filled with 8.5 L of helium (He) when the temperature is 294 kelvin. The party starts at 4:00 p.m., at which time, the temperature has risen to 305 kelvin. What is the new volume of the balloon?
Answer:
V₂ = 8.8 L
Explanation:
Given data:
Initial volume = 8.5 L
Initial temperature = 294 K
Final temperature = 305 K
Final volume = ?
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 = 8.5 L × 305 K / 294 k
V₂ = 2592.5 L.K / 294 K
V₂ = 8.8 L
Areas of Earth that are covered with copious amounts of water are part of
this sphere?
Biosphere
Geosphere
Hydrosphere
Monosphere
Answer:
Hydrosphere
Explanation:
Hydro meaning water
3. How is the transfer of energy different in electromagnetic waves
compared to mechanical waves?
Answer:
Electromagnetic waves are produced by the vibration of charged particles. ... A mechanical wave is a wave that is not capable of transmitting its energy through a vacuum. Mechanical waves require a medium in order to transport their energy from one location to another. A sound wave is an example of a mechanical wave.
Explanation:
what is The mass of an object if it's density is 12.00 g/mL and it's volume is 3.0 mL
Answer:
36
Explanation:
The formula for density is p=m/v. So we have to rearrange the formula.
It would look like this:
12.00 = m/3.0
From we would just solve by bringing the 3.0 to the other side and multiplying that to 12.00. Which gives us 36
Biodiversity/having lots of
different plants and animals in
a food web is important
because
Biodiversity is really important, because different species support each other in an ecosystem, and this maintains a healthy ecosystem.
Hope this helps! :)
and have a good day :)
Explain, in terms of electrons, energy, and energy levels, how the bright-line spectrum of an element is produced