Answer:
In West Africa, garri refers to the creamy granular flour obtained by processing the starchy tuberous roots of freshly harvested cassava. ... Flour foodstuffs mixed with cold or boiled water are a major part of the diet amongst the various ethnicities of Nigeria, Benin Republic, Togo, Ghana, Guinea, Cameroon and Liberia.
Explanation:
Why does the battery give a reading of 9V even though there are no electrons flowing around the circuit?
Answer:
because battery have it's own voltage in it's composition
which best describes nuclear energy?
A the energy that matter has due to the vibrations of its particles
B the energy an object has due to its chemical bonds
C the energy generated by a flow of electrons
D the energy stored inside the center of an atom
Answer:
The correct answer is - D. the energy stored inside the center of an atom.
Explanation:
Each atom has a small center in it called the nucleus and the energy that holds the nucleus or center of the atom together in the atom is known as nuclear energy.
It is the energy that is stored in the center of the atom and normally does not come out, however, in some radioactive atoms the sends some part of the energy as radiation.
Thus, the correct answer is - D. the energy stored inside the center of an atom.
A student wants to separate a mixture of salt and water in a laboratory (a) Describe how the student can obtain both salt and water from the salt solution
Answer:
okay so basically what you are being tested is if you know the difference between simple and fractional distillation and okay you can evaporate the mixture but you won't obtain water so you will use simple distillation to obtain both salt and water
En una carrera de atletismo un deportista se muestra agotado sin fuerzas para continuar y decide abandonar la carrera ¿Que alimentos tomo antes de la carrera ?
Answer:
Los alimentos para evitar la fatiga durante una carrera son alimentos bajos en grasas y altos en carbohidratos, así como alimentos bajos en fibra como pan, mantequilla de maní, plátano, jugo de frutas sin pulpa, y beber hasta aproximadamente 600 ml de líquido aproximadamente 3 horas. antes de la carrera
La comida para comer unos días antes de la carrera incluye carnes magras, arroz, pasta y verduras con contenido de almidón.
Los alimentos que se deben evitar incluyen carne roja, alimentos con alto contenido de grasas saturadas, alimentos fritos, pasteles y salchichas.
Explanation:
If the volume of a gas is decreased by changing the shape of the container, the number of collisions per area between the molecules and the container walls will increase. This corresponds to an increase in the gas pressure, which is the force exerted per area. What gas law is kinetic molecular theory of gases (KMT) explaining in this case
Answer:
If the volume of a gas is decreased by changing the shape of the container, the number of collisions per area between the molecules and the container walls will increase. This corresponds to an increase in the gas pressure, which is the force exerted per area.
phương trình nào sau đây không đúng
Mg(OH)2 (t°)→ MgO+H2O
Fe(OH)2 (t°,chân không)→FeO+H2O
2Fe(OH)3 (t°)→Fe2O3+3H2O
2NaOH (t°)→Na2O+H2O
Phương trình NaOH sai nha
Magnesium and Hydrochloric acid (HCl) react to form magnesium chloride (MgCl2) and hydrogen gas. If you started with 65.8 g of magnesium and 45.7 g of hydrochloric acid. What is the limiting reactant? Ensure you post calculations to prove your answer. (3 marks)
Answer:
Cl
Explanation:
n for Mg=m:Mm
=65.8:24
=2.74mol
n for Cl=m:Mm
=45.7:70
=0.65mol
According to the number of moles we can say that the limiting reagent is Cl as it has few moles.
Limiting agents are the reactant that determines the amount of the product in a reaction. In the reaction between magnesium and hydrochloric acid, the limiting reagent is HCl.
What is a limiting reagent?A limiting reagent is a substance that restricts or determines the amount of product formation in a reaction. They are the reactants with less number of moles and get consumed in the reaction before the other reactant.
The reaction between magnesium and hydrochloric acid is given by,
Mg(s) + 2HCl(aq) → MgCl₂(aq) + H2(g)
Here, 1 mole of Mg and 2 moles of HCl are required to produce 1 mole of magnesium chloride.
The moles of Mg,
= 65.8 g ÷ 24.305
= 2.707 mol
And, moles of HCl
= 45.7 g ÷ 36.458
= 1.253 mol
The stoichiometric ratio Mg : HCl = 1:2
Hence, Mg = 2.707 ÷ 1 = 2.707 and HCl = 1.253 ÷ 2 = 0.6265
Therefore, HCl is the limiting reagent.
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Aluminum hydroxide containing medicine is used for gastric why
Answer:
Aluminum Hydroxide, Magnesium Hydroxide are antacids used together to relieve heartburn, acid indigestion, and upset stomach. They may be used to treat these symptoms in patients with peptic ulcer, gastritis, esophagitis, hiatal hernia, or too much acid in the stomach (gastric hyperacidity).
Answer:
wow it's a very nice question
are these following a basic radical or acid radical?
1. Chlorate
2. Peroxide
3. Silver
4. Zinc
5. Nitrite
Answer:
chlorate=Acid
peroxide=Acid
silver=Acid
zinc= Basic
nitrite=Acid
PLZ HELP ME WITH MY WORK
How many different elements are there in the molecule C8H11NO2,?
A. 21
B. 2
c. 11
D. 4
Answer:
option C 11
is the correct answer
Classify HBr as a strong acid or a weak acid.
Strong Acid or Weak Acid?
I pls help me this is the question:
define the following terms below
Answer:
natural resources: materials or substances such as minerals, forests, water, and fertile land that occur in nature and can be used for economic gain.
renewable resources: a natural resource that is unlimited or that is naturally replenished rather quickly, such as sunlight or water
non renewable resources: (also called a finite resource) is a natural resource that cannot be readily replaced by natural means at a pace quick enough to keep up with consumption.
Did you know that before pencil erasers were added on in 1858. people got rid of pencil markings
with white breadcrumbs? Which would erase pencil markings better, an eraser or white bread
crumbs?
Make a hyphotesis plz
Answer:
I guess eraser is better than bread crumbs
Erasers would be better than white bread or crumbs to erase the pencil marks because they would not leave any food marks on the paper and using bread crumbs.
What is an eraser?An eraser is an object of stationary which is used to remove pencil marks from the paper. It is used during writing, when we write something wrong, we could erase or remove the writing from the paper. It is very useful for small children because they usually make mistakes while studying.
Erasers are made from the milk of rubber plants. The milk is collected from the plants, and then it is mixed with chemicals and set down, and then cut into pieces.
Thus, Erasers would be preferable to utilizing bread crumbs or white bread because they would not leave any food stains on the paper after erasing the pencil markings.
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Freezing point depression is:
A. When a substance freezes and then quickly drops in temperature.
B. When a substance drops in temperature until it freezes, then quickly rises in temperature but stays frozen.
C. When a substance does not need to be as cold as normal in order to freeze.
D. When a substance must be colder than normal in order to freeze.
Freezing point depression is when a substance must be colder than normal in order to freeze.
Freezing point is that temperature where a liquid substance becomes a solid i.e. freezes. Freezing point depression is the process whereby the temperature at which a substance freezes is lowered.Freezing point depression often occurs when a solute is added to a solvent. This reduces its freezing point. Since temperature is reduced, in other words, this means that the substance must become colder than normal for it to start freezing.
Hence, freezing point depression is when a substance must be colder than normal in order to freeze.
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D. When a substance must be colder than normal in order to freeze.
Explanation:
hey love, I just took the quiz on this for founder's education. I hope this helped.
What type of Nuclear decay is shown by the reaction below
Answer:
bete is your answer.
have a great day.
I think c ....is write answers
state the modern periodic law
Answer:
The modern periodic law states that the physical and chemical properties of the elements are the periodic function of the atomic numbers and electronic configurations. ... This repetition occurs if the arrangement of the elements is in order of their increasing atomic numbers.
7. In a remote area of Columbia, kids have to travel to school on a zip-line!
Would school attendance increase if all kids has to get to school on a fun
zip line?
Make a hyphotesis
Help plz!!!
Answer:
yes
Explanation:
Kids like fun things, and school is not fun , so if kids got to go to school on a zipline, attendance would be through the roof!
Think of a real life simple problem and apply scientific method to solve the problem given to the guide questions.
Scientific Approach is to identify a problem and finding solution to the problem. There are various steps in scientific approach to solve a problem,
Identify the problem
Analyze the impact
Find available solution
Evaluate different alternative solutions
Choose the best alternative
Apply the solution to the problem
Measure the results
Lets say there is a fire at some place.
There are various solution available, the fire can be slowed down by water, using fire extinguisher or sand.
The best alternative is to use fire extinguisher.
The fire is vanished after the use of fire extinguisher.
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In an electrochemical cell, equilibrium is the point at which:
A. None of these
B. both electrodes have an equal number of electrons.
C. ion concentrations are no longer changing and the voltage is 0.
D. Equilibrium cannot be reached in a voltaic cell because electrons only flow in one direction.
Answer:
C. ion concentrations are no longer changing and the voltage is 0.
Explanation:
Electrochemical cells are a device that generates current from redox reactions. In the cell, the equilibrium is reached when the voltage drops to 0. Thus, option C is correct.
What is an electrochemical cell?An electrochemical cell is a voltaic device that uses chemical energy to generate electrical energy and vice versa. It is of two types electrolytic and galvanic cells depending on the energy it produces.
The electrochemical cell comprises two electrodes namely an anode and cathode, a salt bridge or the porous barrier, and an external connection.
The connection shows the voltage that indicates the equilibrium. When the current flow stops and the voltage reaches zero, the electrochemical cell is said to be in equilibrium.
Therefore, no change in the ionic concentrations and zero voltage indicates equilibrium.
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match electrons answer help
Answer:
carbon- 4
hydrogen- 1
magnesium- 2
oxygen- 6
hope it helps!
Answer:
CARBON - 4 VALENCE ELECTRONS HYDROGEN - 1 MAGNESIUM - 2 OXYGEN - 6A reaction happens quickest during:
A. The beginning of the reaction
B. It is constant throughout the reaction
C. The end of the reaction
D. The middle of the reaction
The reaction is the formation of the product from the reactants. A reaction happens quickest during the beginning of the reaction. Thus, option A is correct.
What are the factors affecting the reaction rate?The reaction rate is the pace at which the reaction takes place and the breakdown or the combination of the reactants to produce the products. The rate of reaction depends on the concentration of the reactants.
The concentration of the reactants is in direct proportion with the rate as at the beginning of a reaction there is a higher amount of substance present than at the end.
As the reaction proceeds, the reactants get consumed and their concentration decreases. As there is a decrease in concentration the rate of the reaction converting and producing the products also decreases.
Therefore, option. the rate of reaction is fast at the beginning.
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what is plasma in chemistry
Explanation:
Plasma is an ionized gas, a distinct fourth state of matter. “Ionized” means that at least one electron is not bound to an atom or molecule, converting the atoms or molecules into positively charged ions.but plasma is present in human body too in a liquid form.
hope this helps you
have a nice day
which of the following two conditions will favor a spontaneous reaction?
a) an increase in entropy and a decrease in enthalpy
b) an increase in both entropy and in enthalpy
c) a decrease in entropy and a decrease in enthalpy
d) a decrease in entropy and an increase in enthalpy
Two metals with equal mass will absorb heat according to their heat absorbing capacity.
The increase in entropy will cause the solid substance to break into multiple pieces.
When these solute particles detach from each other they will form a solution. Entropy increase will cause the temperature to increase.
Decrease in enthalpy is an exothermic reaction which releases heat from the reaction and then desired products will be formed.
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The seeds of a dandelion are wispy and very light. A single dandelion produces many seeds. How does the structure of the seeds relate to the dandelion's method of spreading seeds?
A Dandelion seeds are spread mainly by the wind. Because they are light, the wind can carry them. The dandelion produces many seeds because not all seeds will land in a good location to sprout.
B. Dandelion seeds are spread primarily by becoming attached to animals' fur. Because they are light, the animals can cany many without noticing. The dandelion produces many seeds because not all seeds will land in a good location to sprout
C. Dandelion seeds are spread mainly by animals that eat them Because they are light the animals will eat many seeds. The dandelion produces many seeds in order to outcompete other plants for resources
D. Dandelion seeds are spread primarily by moving water. Because they are light, they will float on the water. The dandelion produces many seeds in order to outcompete other plants for resources. SIMIT
Answer:
the answer will be number...D
Answer:
The answer is A
Explanation:
Because dandelions are wispy and very light, the slightest gasp of wind helps carry the dandelions to new locations and help reproduce the seed into a new dandelion.
Experts believe that a good night sleep is vital to a success in school. Would kids that sleep 8 or
more hours a night get better grades than kids who sleep less than 7 hours a night?
Make a hyphotesis
Answer:
kids who sleep 8 or more hours a night
Explanation:
I hypothesize that kids who sleep 8 plus hours a night because your brain needs a good night's sleep to regenerate .
Convert 100 miles to inches (there are 5280 ft in one mile)
using the method of dime signal analysis
Answer:
Explanation:
100 miles * [ 5280 feet / 1 mile] * 12 inches / 1 foot]
100 * 5280 * 12 inches
6336000 inches in 100 miles
PLZ HELP what is a sign that a chemical change has happened
Answer:
Some signs of a chemical change are a change in color and the formation of bubbles. The five conditions of chemical change: color change, formation of a precipitate, formation of a gas, odor change, temperature change.
Arrange the steps in order to describe how photons and carbon dioxide (CO2) contribute to the warming of Earth.
CO2 in the atmosphere absorbs infrared
photons.
CO2 in the atmosphere emits infrared photons back toward Earth.
Photons from the Sun strike Earth and become infrared photons.
Earth radiates infrared photons into the atmosphere
The Sun radiates sunlight (visible)
photons
The Sun radiates sunlight (visible) photons
Photons from the Sun strike Earth and become infrared photons.
Earth radiates infrared photons into the atmosphere
CO2 in the atmosphere absorbs infrared photons.
CO2 in the atmosphere emits infrared photons back toward Earth.
Certain gases are known to contribute towards global warming. Such gases are called greenhouse gases. The infrared rays from the sun are absorbed by these gases as they are re-emitted from the earth and re-emitted.
The sun radiates photons to the earth which is re-radiated into outerspace from the earth's surface. CO2 and other greenhouse gases absorbs these gases and re-emit them to the earth thereby causing a gradually rise in the temperature of the earth called global warming.
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how is electrovalent bond formed ? Describe with an example .
Answer:
For example, the bond between the sodium and chlorine atoms in sodium chloride (NaCl) is formed by the transfer of an electron from sodium to chlorine, creating Na + and Cl – ions. ... The electrostatic attraction between these ions provides the bonding in NaCl.
Which statement describes a condensation reaction?
A. monomers break away when one forms a double bond monomers break away with the addition of a water molecule.
B. Two monomers combine when one adds to the double bond of another.
C. Two monomers form a new bond with the loss of a water molecule .
The statement that describes a CONDENSATION reaction is that two monomers form a new bond with the loss of a water molecule . That is option C.
CONDENSATION REACTION involves the combination of two or more molecules(monomers) of water. In reaction, a new bond is usually formed.
The characteristics of a condensation reaction includes:
formation of complex molecules (combination of two smaller monomers),water is usually given off as by product it requires a catalyst for a complete reaction to occurA reaction is called a condensation reaction because a small molecule such as water is released as a byproduct.
A typical example of a condensation reaction is the condensation of amino acids to form dipeptide. The −OH from the carboxyl group of one amino acid combines with a hydrogen atom from the amine group of the other amino acid to produce water.
Therefore, the statement that describes a CONDENSATION reaction is that two monomers form a new bond with the loss of a water molecule. That is option C
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