Explanation:
carbon dioxide has a percent composition of 72.7% oxygen, i.e. for every 100 g of carbon dioxide you get 72.7 g of oxygen.
What is the name of the compound with the chemical formula Br2F8?
The name of the compound with the chemical formula Br2F8 is dibromo octafluorine.
How chemical compounds are named?The chemical formula of a compound shows the type and proportion of each element that makes up the chemical compound.
According to this question, a compound with chemical formula Br2F8 is given. The compound consists of the following:
2 atoms of Bromine8 atoms of fluorineTherefore, the name of the compound with the chemical formula Br2F8 is dibromo octafluorine.
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In which section(s)/point(s) is the car not moving/at rest?
Answer:
a-b and e-f
Explanation:
At these intervals, there is no change in distance covered as time continues.
A blue fish and a yellow fish mate and have green offspring. What type of inheritance is this an example of?
The type of inheritance displayed by the illustration is incomplete dominance.
Incomplete dominanceIt is a kind of inheritance in which one of the two alleles of a gene exerts incomplete influence on the other allele.
For example, a cross of white and red flower plants yielding a plant with pink flowers. It means that the dominance of the red or pink allele is incomplete.
The same is applicable to a blue fish mating with a yellow fish to produce green offspring. A blend of the two colors occurred.
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Pls help me on this question and I will grant 100 points and brainly mark for the first 5 correct answers. Also I need it ASAP
Answer:
Explanation:
i) Red as Methyl orange shows red color in acidic medium and hyrdochloric acid is acidic.
ii) In 10cm^3 of 0.100 mole/dm^3 of hydrochloric acid, there are:
10/1000*0.1 = 1.00x10^(-3) moles of hydrochloric acid were used.
Why do you feel the force of Earth's gravity?
•Why do you feel the force of Earth's gravity?
Answer:
•Earth's gravity comes from all its mass. All its mass makes a combined gravitational pull on all the mass in your body. That's what gives you weight. And if you were on a planet with less mass than Earth, you would weigh less than you do here.
Explanation:
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What is Ivan Pavlov most known for?
Answers may vary: His experiment in which he trained dogs to salivate at the sound of a bell
Ivan Pavlov is most known for demonstrating conditioned lreflex in dogs.
what is conditioned reflex?Conditioned reflex is a reflex action which has been conditioned to occur even without the stimulus which produces the reflex.
Ivan Pavlov is known to demonstrate conditioned reflex in dogs.
In his experiment, he trained dogs to salivate at the sound of a bell even if food which is the stimulus that produces salvation was not present.
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Answer:
A conditioned reflex is a reflex action that has been trained to occur even when the stimulus that causes the reflex is not present.
Ivan Pavlov is recognized for using dogs to illustrate conditioned reflexes.
He trained dogs to salivate at the sound of a bell even when food, the stimulus that induces salvation, was not present in his experiment.
Explanation:
why is earth's atmosphere located above earth's crust? A because gases in the atmosphere are warmer. Because gases in the atmosphere have no mass. C because gases in the atmosphere are less dense. D because gases in the atmosphere take up less space?
Answer: C because gases in the atmosphere are less dense
Explanation:
If 8.25 grams of lead II nitrate reacts, how many grans of sodium nitrate is produced?
someone help me what is the difference between alchemy and chemistry
Answer:
Alchemy is based on mystic view of reality whereas chemistry is based on experiments, observations and facts.
What is a new trend in the recreational drug field?
Answer:
depressants
Explanation:
these are new to the recreational area of drugs
which of these does an open office or microsoft office wizard do?
Answer:
C. guides you through the steps to complete a complex task.
Explanation:
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Explain when the term vapor should be used to describe the gas phase.
Fission involves the _________________ of an atom into smaller particles, while fusion occurs when smaller particles _________________.
Answer:
1. Splitting
2. Combine
Explanation:
The reason an increase in substrate concentration does not increase the reaction rate indefinitely is because
Answer:
Increasing substrate concentration also increases the rate of reaction to a certain point. Once all of the enzymes have bound, any substrate increase will have no effect on the rate of reaction, as the available enzymes will be saturated and working at their maximum rate.
What is the ionization of Ba(OH)2? Please help!
The ionization potential of Ba(OH)2 was found to be 8±1 eV, with a value of 6±1 eV for the monohydroxide.
3. A 1.000 g sample of an unknown hydrate of copper chloride is gently dehydrated. The copper is isolated and weighs 0.248 g.
Develop a method for determining the empirical formula of the copper compound and for determining the percent by mass of copper in the compound.
Remark: The experimental data table obtained by the student is shown below.
Data:
Mass of crucible 20.43 g
Mass of crucible + CuxCly • zH2O. 21.43 g
Mass of crucible + CuxCly 20.976 g
Answer: not sure on actual answer, but heres a answer on a similar question with just different quantities.
Explanation: just minus the terms i got and u should be okay
Compare the location of bonding electrons in a polar covalent bond with those in a nonpolar covalent bond!!?????!????? I NEED HELPPPP
Answer:
A polar covalent bond will have the electrons shifted more towards one side or the other; a nonpolar bond will have evenly distributed electrons.
Explanation:
The basis for a polar bond is that the electrons are shared unevenly. Some elements are more electronegative than others; that is, they pull harder on the electrons and tend to have more electrons around them. Following the periodic trends, Fluorine is the most electronegative element, so it will likely have the most dense area of electrons in a molecule. All this means that in a polar molecule, the electrons will be spread out unevenly along the lengths of the bonds as some elements will pull on them more than others will.
Nonpolar molecules do not have to worry about differences in electronegativity, and so the electron density will be pretty evenly distributed along the entire molecule.
Hope this helps! :)
8. I have a mixture of iron, salt, and
water. I heat it up to a boil.
Explain what happens to each part
of my mixture.
After boiling the mixture of iron salt, water
iron, and salt it will remain and water will be evaporated
Calculate the percent composition of hydrogen in C8H9NO2.
Answer:
72.72%
Explanation:
What do all types of waves transfer from place to place? A. air B. energy C. matter D. water
Answer:
Water is the answer
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How will you separate a solution of benzene and chloroform?
Answer:
[tex]\huge\boxed{\sf Distillation}[/tex]
Explanation:
State of benzene at RTP = liquidState of chloroform at RTP = liquidBoiling point of benzene = 80.1 °CBoiling point of chloroform = 61.2 °CSince, both of the chemicals are liquids, we can separate it by the process of distillation.
Distillation:
is the process in which we separate two liquids on the basis of their difference in boiling points.How it works:
Since chloroform has less boiling point, it will evaporate and collected first and benzene will follow it after sometime.
- Apparatus of distillation is in the attached file.
[tex]\rule[225]{225}{2}[/tex]
Please help me
Calculate the percentage of nitrogen in the two important nitrogen fertilizers,ammonia, NH3 and Urea, CO(NH2)2
Answer:
Percent composition = mass of element in the compound/mass of compound × 100
In this case, the mass of the compound is its molar mass.
Percent Composition of N in CO(NH2)2 (urea)
Molar mass CO(NH2)2 = 60.056 g/mol
Mass of N = 2×14.007 g/mol = 28.014 g/mol
%N: 28.014 g/mol/60.056 g/mol × 100 = 46.646%
Percent Composition of N in NH4NO3 (ammonium nitrate)
Molar mass of NH4NO3 = 80.044g/mol
Mass of N = 2×14.007 = 28.014 g/mol
%N: 28.014 g/mol/80.044 g/mol × 100 = 34.998%
Hope this helps, please let me know If I'm wrong.
Limiting and Excess Reactant
1. Aluminum chloride, AlCl3, can be made by the reaction of aluminum with chlorine according to the following equation (must be balanced first):
2Al + 3Cl2 ------> 2AlCl3
What are the limiting and excess reactants if 20.0 grams of Al and 30.0 grams of Cl2 are used?
2. Chloroform, CHCl3, reacts with chlorine, Cl2, to form carbon tetrachloride, CCl4, and hydrogen chloride, HCl. In an experiment 25 grams of chloroform and 0.36 mol of chlorine were mixed. Which is the limiting reactant? The equation is given as
CHCl3 + Cl2 -------> CCl4 + HCl
Answer:
1. LR: Cl2, ER: Al 2. LR: CHCl3
Explanation:
1. Find g/moles of Al and Cl2
g/moles of Al: 0.74 and Cl2 is 0.42
We can find the limiting reactant by take those number divided by 2 and 3
0.74 divided by 2 = 0.37
0.42 divided by 3 = 0.14 so 0.14 is the least -> that going to be the limiting reactant. (Cl2)
Now we know Al is a excess reactant.
2. That equation is already balanced and it's already give us 0.36 mole of chlorine, now we just need to find the mole of chloroform ( CHCl3 )
To do that we need to find the molar mass of CHCl3 which is 119.0 g/moles
then take 25 grams ÷ by 119g/moles we will get: 0.21 mole of CHCl3 that's mean CHCl3 is a limiting reactant.
help!!
You see a large number of waves that are very tall. What is the appropriate wave description?
A. Small frequency; small amplitude
B. Large wavelength; large amplitude
C. Large frequency; small amplitude
D. Large frequency; large amplitude
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Find the sum of 4.5 mm and 24.4 mm.
28.9 mm >
6.9 mm
30 mm
29 mm
Answer:
28.9
Explanation:
4.5+24.4
= 28.9
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Once a hypothesis becomes a theory, is it then considered an absolute fact? Explain.
Answer:
No, a hypothesis can only become a fact if the outcome happens over and over. A theory means that it could be true but the outcome can also be false.
Explanation:
2. A scientist mixed two samples together: a colorless liquid that melts at 12°C and a yellow solid that melts at 390°C. She analyzed the results and found two ending substances. One of the ending substances was a gray solid. This ending substance is made up of the repeating group of atoms shown above. Which of the diagrams to the left shows the repeating groups of atoms that make up the samples the scientist mixed together?
Since a chemical reaction is said to have occured when two or more substances are chemically combined together, the starting materials must be sample 1 and 2 as shown in optionB.
What is a chemical reaction?A chemical reaction is said to have occured when two or more substances are chemically combined together. We must note that a chemical reaction produces new species that contain atoms that were present in the reactants.
Having said this much, considering the image of the product shown, the starting materials must be sample 1 and 2 as shown in optionB.
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If an isotope decays by the process of beta emission,
a. the number of neutrons remains the same
b. the atomic number changes
c. the mass number changes
d. protons are given off
What is respiration? Explain in your own words
Answer:
breathing
Explanation:
Your welcome lol
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Answer:
SEE BELOW
Explanation:
The act or process of breathing i.e the inhaling of oxygen and the exhaling of carbon dioxide. The process in which cells use oxygen to break down sugar and obtain energy which is used for various purposes.
9. I have a mixture of iron, salt, and water. I bring a magnet close by. What does the magnet pick up and what is left behind?
Explanation:
magnet will attract iron.
salt and water is left behind