Answer:
Both switches must be closed in order for the circuit to be complete and for the bulb to light. (This would indicate the 'armed' status of this burglar alarm.) Magnetic switches come in 2 varieties - "Normally Closed" and "Normally Open". These 2 terms describe the state of the switch when it is NOT being controlled by the magnet.
Explanation:
Fat is a ____________ (Body Buiding / Energy Giving / Protective ) food.
Fat is a energy giving , protective food
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I give my best answer almost
Tính axit giảm dần của các chất C6H5 OH (1) ,p – CH3 OC6H4 OH (2), p-NO2C6H4OH (3) pCH3COC6H4OH (4), p-CH3C6H4 OH (5) là:
Answer:
di ko po Alam sorry
Explanation:
sorry sorry sorry sorry sorry
Which characteristic do valence electrons indicate about reactions between atoms? (1 point)
o electronegativity difference
o absolute electronegativity
o bond type
o bond number
The characteristic of reactions that depends on valence electrons is the bond type.
In chemistry, a chemical bond could be;
IonicCovalentThe type of bond formed depends on the number of valence electrons present. When there are few valence electrons on an atom, it mostly forms ionic bonds.
When there are more electrons on an atoms, it mostly forms covalent bonds and the electrons between the atoms are shared.
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Answer:
D: bond number
introduced in the 13th-16th? century from sabah in the reign of the sultanate of sulu, and became extinct on maguindanao or were transported back to sabah. Bone fragments are the only proof left behind of their existence ...ill mark u as brainliest
The Elephant Maximus is the species that was introduced and later became extinct on Maguindanao.
Extinction occurs as all members of a species die, and therefore the species disappears. This includes complete extinction or extinction of the species in a specific zone.
In the case of the Elephant Maximus, which is known as the Asian Elephant, this species became extinct in a region known as Maguindanao in the Philippines.
This partial extinction occurred as the elephants from this zone were taken to Sabah in Malaysia from the 13th century to the 16th century. This occurred because the Sultans of this region considered this elephant to be a valuable and even sacred animal.
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EXPLAIN BRIEFLY WHY CHEMISTRY IS CONSIDERED AS MAJOR BRANCH OF SCIENCE
Answer:
Chemistry is sometimes called “the central science,” because it bridges physics with other natural sciences, such as geology and biology. Chemistry is the study of matter and its properties.
Explanation:
~found it~
What is the controlled variable of your experiment?
Your answer
Answer:
The controlled variable of an experiment is the one thing that stays the same in an experiment.
Explanation:
An example would be : if I have two pennies, both dunked in water, but than I change one to be dunked in vinegar, the one dunked in water still is the constant or the controlled variable.
I'll mark you the brainiest if you answer this question first!!!
Read the CDC's recommendations for frequency of handwashing. Do you agree with these recommendations? Explain your answer using the results from the experiment as evidence.
Link down below:
https://www.cdc.gov/handwashing/when-how-handwashing.html
Answer:
Yes, Because the dishes that are unwashed have the most bacteria while the soap & water dish has the least bacteria.
Explanation:
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How do we find the atomic size of an atom?
Answer:
The size of an atom can be estimated by measuring the distance between adjacent atoms in a covalent compound. The covalent radius of a chlorine atom, for example, is half the distance between the nuclei of the atoms in a Cl2 molecule.
Explain the process of ionization in at least 1 paragraph.
Brainliest goes to best explanation!
Explanation:
Ionization is the process by which ions are formed by gain or loss of an electron from an atom or molecule. If an atom or molecule gains an electron, it becomes negatively charged (an anion), and if it loses an electron, it becomes positively charged (a cation). Energy may be lost or gained in the formation of an ion.
Marcos thought that energy drinks would increase students' productivty. Before he set his
hypothesis, he read newspaper and magazine articles on the effects of energy drinks, he
also conducted a few searches on the internet. What part of the scientific method did
Marcos just complete?
Answer:
Researching maybe? That's a scientific method lol
What is the density of the marble?
0.22 g/mL
1.67 g/mL
60 g/mL.
460 g/mL
Explanation:
option B is the correct answer, 1.67g/mL.
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What is surface tension and why is it important?
Answer:
What is surface tension?
Explanation:
Surface tension and droplets: Surface tension is responsible for the shape of liquid droplets. Although easily deformed, droplets of water tend to be pulled into a spherical shape by the cohesive forces of the surface layer.
Surface tension forces between mucosal surfaces play an important role in the pathogenesis of the disease. The obstruction of upper airway elicit the activation of autonomic nervous system, hypoxemia, and arousal from sleep.
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What mineral is composed of sodium chloride (NaCl)?
Answer:
Salt
Explanation:
The mineral form halite , or rock salt is sometimes called common salt
On vacation, Aria went scuba diving in the Pacific Ocean for the very first time. She rose toward the surface of the water at a steady speed for 4 minutes. She rose 36 meters in that time. What was her speed? HELP ME ASAP!!!!!!!!!!!!!
Aria speed during scuba diving was 0.15 m/s.
Speed is the ratio of the distance travelled to the time taken. Speed is given by:
Speed = distance / time
Given that the distance travelled was 36 meters and the time was 4 minutes, hence:
Time = 4 minutes × 60 seconds per minute = 240 seconds
Speed = 36 m / 240 s
Speed = 0.15 m/s
Therefore Aria speed during scuba diving was 0.15 m/s.
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chemical formula of vinegar + cream of tartar
Which of the following molecules is nonpolar?
Ο Α. CO2
Ο Β. SO,
Ο Ο Ο Ο
O C. CO
D. NO
Answer:
CO2
Explanation:
There are two types of moleculesPolarNon polarNon polar molecules are insoluble in water .
Option A
[tex]\sf \longmapsto co_{2}[/tex]
[tex]\sf Co_{2}[/tex] is a non polar molecule.[tex]\sf \longmapsto\sf Co_{2}[/tex]
Lewis Structure =
[tex]\sf \longmapsto\sf \: o \: = c = o[/tex]
[tex]\sf \longmapsto4 + 6(2)[/tex]
[tex]\sf \longmapsto16[/tex]
Non polar molecules are non-soluble in water.According to the law of conservation of matter, which statement about chemical reactions is true? A. Atoms cannot be created or destroyed by chemical reactions. B. Atoms are created by some reactions and destroyed by others. C. Energy is created as atoms are destroyed in chemical reactions. D. Every atom destroyed in a chemical reaction must be replaced.
Is
M
For the following reaction, 43.1 grams of iron are allowed to react with 86.8 grams of chlorine gas.
ts
M
iron (s) + chlorine (g)
iron(III) chloride (s)
ts
M
What is the maximum amount of iron(III) chloride that can be formed?
grams
ots
M
What is the FORMULA for the limiting reagent?
ots
M
ots
What amount of the excess reagent remains after the reaction is complete?
grams
Ots2req
O
Submit Answer
Retry Entire Group
9 more group attempts remaining
Answer:
here is your answer
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A student creates a sports drink by dissolving 5.0 g of powder in 250 mL of water. The green colour of the drink is due to the presence Green Dye X, which has a lambdamax of 630 nm. A calibration curve (absorbance versus concentration) at lambdamax is created for varying concentrations (mM) of Green Dye X which has the equation y = 26.4x. If 1.0 mL of the sports drink is diluted to 10. mL with water, then the absorbance is measured to be 0.450, what is the mass percent of Green Dye X in the drink powder if the molecular weight is 418.4 g mol-1?
The mass percent of Green Dye X in the drink powder if the molecular weight is 418.4 g/mol is 0.355%
Beer's law explains the relation between the concentration of a solution to its absorbance (A) by using the equation.
A = ∈×C×Lhere:
∈ = molar absorptivityL = path lengthNow from the calibration curve in the question, the plot between the absorbance and the concentration gives a straight line of y = mx.
Here
y = absorbance x = concentrationThe equation of the calibration curve is given as:
y = 26.4xi.e.
0.450 = 26.4x[tex]\mathbf{x = \dfrac{0.450}{26.4}}[/tex]x = 0.017 mMIf the sports drink was 10 times diluted while taking the absorption measurement. Then, the actual concentration of green dye in the sports drink is:
= 0.017 mM × 10
= 0.17 mM
The number of moles of green dye in 250 mL (i.e. 0.25 L) sports drink is estimated as:
= 0.17 mmol/L × 0.25 L
= 0.0425 mmol
However, the mass of the green dye present in the sports drink is
= 0.0425 mmol ×418.4 g/mol
= 17.782 mg
Finally, the mass percent of green dye in the drink powder is:
[tex]\mathbf{ = \dfrac{mass (dye)}{mass (powder)} \times 100\%}[/tex]
[tex]\mathbf{ = \dfrac{17.782 \ mg }{5.0 \ g} \times 100\%}[/tex]
[tex]\mathbf{ = \dfrac{17.782 \ mg }{5000 \ mg} \times 100\%}[/tex]
= 0.355 %
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How many grams of pure aluminum could be produced from 999 g of aluminum oxide?
Answer:
Explanation:
First, calculate the molar mass of Aluminum Oxide (Al2O3), by multiplying the number of the constituent atoms, by their relative atomic abundances . Inserting the atomic masses into the equation gives you . Then find the percent of Aluminum by mass, in Aluminum Oxide. Finally, set up an equality, where 53.02% of the mass of Aluminum Oxide, is 999 grams of Aluminum
What is this answer to this problem
Answer:
gdhjvdhihfhddjcuh
dhsgbeyfgjgjjkk
tjfhh
gjgu
. The atomic number of a newly discovered element is found to be 128, and its mass number is 279.
How many protons, neutrons, and electrons are found in an ion of this element bearing a charge of
5−?
A blank is formed or separated by physical processes.
Carbon has three isotopes: carbon-12, carbon 13, and carbon-14. If the average atomic mass on the
periodic table for carbon is 12.011 amu, which isotope is most abundant? Explain your answer using a complete sentence.
Answer
The most abundant carbon isotope is carbon-12
Explanation:
The relative atomic mass of carbon is 12.011, which is extremely close to 12.0. This means that the masses C-13, and C-14 are practically negligible when contributing to the relative atomic mass of carbon.
In fact, the C-12 isotope makes up 98.9% of carbon atoms, C-13 makes up 1.1% of carbon atoms, and C-14 makes up just a trace of carbon atoms as they are found in nature.
Please tell me an example of a protein structure that would give positive test with Molisch’s Reagent?
Answer:
positive reaction for Molisch's test is given by almost all carbohydrates (exceptions include tetroses & trioses). It can be noted that even some glycoproteins and nucleic acids give positive results for this test (since they tend to undergo hydrolysis when exposed to strong mineral acids and form monosaccharides).
Answer:
glycoproteins
Explanation:
A positive reaction for Molisch's test is given by almost all carbohydrates (exceptions include tetroses & trioses). It can be noted that even some glycoproteins and nucleic acids give positive results for this test (since they tend to undergo hydrolysis when exposed to strong mineral acids and form monosaccharides).
define the term chemotherapy.
I'm not able to understand that what is written in the pic.. As I can't understand this language..
Treatment that uses drugs to stop the growth of cancer cells, either by killing the cells or by stopping them from dividing. Chemotherapy may be given by mouth, injection, or infusion, or on the skin, depending on the type and stage of the cancer being treated.
Identify the labeled structures. A: B: B C: < A D: ✓ > E: D AVIS Det E с
please I need your help and fast so as soon as you seen this answer please I will list brainlyist
Answer:
ahhh i d kkkkk im so so so so sorry
Explanation:
Rock salt is a mixture of salt (sodium chloride) and sand. Describe how you would separate rock salt to obtain salt crystals and pure dry sand. In this question you get marks for how well your answer is written. You will get marks for: spelling, grammar, organising your ideas and information clearly and using key scientific words.
Answer:
pour the rock salt mixture throught a filter made from paper and allow the liquid to filtrate .
Explanation:
Separating Sand and Salt
Probably the easiest method to separate the two substances is to dissolve salt in water, pour the liquid away from the sand, and then evaporate the water to recover the salt.
Pour the liquid through a paper filter made of rock salt mixture and let it filter, after complete filtration we obtain crystals of salt.
What is filtration?Filtration is defined as the technique of removing solid particles from a liquid or gaseous fluid by passing the fluid through a filter media while keeping the solid particles behind.
It can also be defined as a physical method that uses a filter media with a complicated structure that only allows fluid to pass through to separate solid matter and liquid from a combination.
There are six types of filtration.
Vacuum filtrationCentrifugal filtrationGravity filtrationCold filtrationHot filtrationMultilayer filtrationMixture is defined as a substance that is composed of two more chemical compounds or substances that do not chemically mix.
There are two types of mixture.
Homogenous mixtureHeterogenous mixtureThus, pour the liquid through a paper filter made of rock salt mixture and let it filter, after complete filtration we obtain crystals of salt.
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Which of the following is based on facts and/ or evidence?
Select the correct answer. Which statement best describes how chemical equations demonstrate conservation of mass? O A. The number of reactants is the same as the number of products. O B. The compounds are the same on each side of the reaction. O c. The number of atoms of each element is the same on each side of the equation. OD. The state of matter is the same on each side of the equation.
Note:
No need to explain.
Answer:
Option C )The number of atoms of each element is the same on each side of the equation.
Answer:
Option D
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