A student is trying to dissolve 20 grams of sugar in a beaker containing 250 milliliters of water at room temperature. What can the student do to make the sugar dissolve faster in the water?
Answer:
They can warm up the water. Sugar dissolves much faster in warm/hot water.
A perfect example of this is when you put sugar in your hot coffee/tea -> it will dissolve almost immediately. If you put sugar in cold water, you will have to stir it for quite some time before it dissolves.
4. If 175 undecayed nuclei remain from a sample of 2800 nuclei, how many half-
lives have passed? (Show your work.) *
Your answer
Answer:
X = 4
Explanation:
Start 2800
End 175
175 = 2800x(0.5)^X
175/2800 = 0.5^X
0.0625 = 0.5^X
log(0.5 x) = log(0.0625)
x · log(0.5) = log(0.0625)
-0.301x = -1.204
x = -1.204/-0.301
x = 4
How many grams are in 0.572 moles of glucose, C6H12O6
Answer:
103.00
Explanation:
1 mole of Glucose
6 C = 6 * 12 = 72 grams
12H = 12 * 1 = 12 grams
6O = 6 * 16 =96 grams
Total = 180 grams
0.572 moles of Glucose
1 mol of glucose = 180 grams
0.572 mols of glucose = x
x = 0.572 * 180
x = 103.00 grams
Which of the following changes depending on the strength of the gravity
field it is in?
A. None of these
B. Mass
C. Matter
D. Weight
Reset Selection
Answer:
D. Weight
Explanation:
Answer:
Weight
Explanation:
Answer via Educere/ Founder's Education
what happens to the zebra molecules once they are eaten by the cheetah?
Answer:
All living organisms need food for their body metabolism. Food helps in the provision of basic nutrients for the body’s survival and growth.
When the Cheetah eats the Zebra, enzymes acts on the Zebra molecules and converts it into smaller molecules.
The smaller molecules broken down are then readily absorbed and used by the cells of the Cheetah.
How is the human hand different from the ape hand
Answer:
in explanation
Explanation:
Human hands are distinguished from apes by possessing longer thumbs relative to fingers.
Hope this helps!!!
Answer:
The human hand and primate hand both have finger prints and palm prints, or palmar whorls, but the prints differ. Human fingerprints have a higher ride density than primate fingerprints, which means the print ridges, or lines, are closer together. While the human’s prints are denser, primates usually have more lines overall.
Explanation:
I've learned this before
In The diagram which part is negatively charged?
• solid Cu
• wire
• salt bridge
• solid Zn
Answer:
Solid Zn
Explanation:
I took the test :-)
In the diagram solid Zn is negatively charged.
When is solid Zn is negatively charged?Zinc is known as a element that acts as a negative electrode based on the fact that it has more negative potential and acts as the anode.
Based on the fact that zinc is a metal, it is known to often forms metallic compounds with other kinds of metals and based on the fact that it also has an ion charge of +2, the zinc ions are referred to as a strong reducing agents and thus do form ionic bonds.
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What might happen to global atmospheric carbon levels if the polar ice caps were to melt?
If the polar ice caps were to melt then it could lift the lid of a new carbon sink capable of soaking up carbon dioxide.
What happens if the polar ice caps melt?
If all the ice protecting Antarctica, Greenland, and mountain glaciers around the sector were to melt, sea degrees might upward push about 70 meters (230 ft). the sea might cowl all of the coastal towns. And the land place would decrease considerably. but many cities, inclusive of Denver, might live to tell the tale.
How do melting ice caps affect the ecosystem?
Melting ice reasons more warming.
because they are darker in the shade, the ocean and land take in more incoming solar radiation and then launch the warmth to the environment. This reasons more global warming. in this way, melting ice causes more warming and so extra ice melts.
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In the reaction, HCl + H2O produces H3O + Cl, what is the conjugate acid
Answer:
Conjugate acid is H3O
Explanation:
HCl + H2O = H3O + Cl
HCl = H+ and Cl- = Acid
H2O = OH- and H+ = Neutral as equal OH- and H+
H3O = H3O+ = Acid also known as Hydronium
Cl = Just free floating Chlorine = Cl-
Conjugate acid is H3O
Acid = A solution with more H+ ions than OH- ions.
please help me!!!!!!!! if the temperature of your ice is 32 percent Fahrenheit and your water is 68 Fahrenheit and you mixed the ice and the water together what temperature is your water?
Answer:
36 degrees farenheit
Using the activity series provided. Which reactants will form products? Na > Mg > Al > Mn > Zn > Cr > Fe > Cd > Co > Ni > Sn > Pb > H > Sb > Bi > Cu > Ag Ag +NaNO3 Right arrow. Fe + Al2O3 Right arrow. Ni + NaCl Right arrow. Fe + Cu(NO3)2 Right arrow.
Answer:
D
Explanation:
To solve this we must be knowing each and every concept related to activity series. Therefore, Fe + Cu(NO[tex]_3[/tex])[tex]_2[/tex] reactants will form products. The correct option is option D.
What is activity series?We refer to the metal series in the image above as the activity series. This serves as a guide so that we can identify the byproducts of a metal displacement process. For displacement to take place, a metal must be placed over the other metallic combination.
Ag is significantly lower than Na in the series so, nothing happens. Since Al is above Fe, there is no response. Ni is below Na, hence no reaction will take place. A displacing reaction will happen because Fe is a greater active metal than copper.
Therefore, Fe + Cu(NO[tex]_3[/tex])[tex]_2[/tex] reactants will form products. The correct option is option D.
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What is the converse of the conditional statement?
Ifx is even, then x + 1 is odd.
If x is not even, then x + 1 is not odd.
Ifx + 1 is odd, then x is even.
Ifx + 1 is not odd, then x is not even
Ifx is even, then x + 1 is not odd.
Answer:
Conversing the conditional statement is nothing but switching the hypothesis and conclusion. Therefore, the converse of the given conditional statement will be “If x is odd, then x+1 is even.
Explanation:
The converse of the conditional statement is if x is odd, then x+1 is even.
What is conditional statement?A conditional statement is defined as a specific kind of compound sentence that meets the "if...then" requirement. If the hypothesis is correct but the conclusion is untrue, a conditional statement is false. Programming language elements called conditional statements, expressions, or simply conditionals instruct the computer to take specific actions.
Reversing the two statements that make up a categorical or implicational statement yields its opposite. Carry on a discussion is more properly referred to as "converse." Let's say there is a conditional statement of the form "If p then q." If q, then p is the converse. In a symbolic sense, q p is the opposite of p q. The reverse of a conditional assertion is not logically comparable.
Thus, the converse of the conditional statement is if x is odd, then x+1 is even.
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Which molecule is butyne?
Answer:
The answer is B.
Explanation:
A P E X
Steel:
Propane:
Calcium chloride:
Water:
Answer:
Steel is a metallic bond
Propane is a covalent bond
Calcium Chloride is an Ionic Bond
Water is a covalent bond
Explanation:
ence a material's properties, identify each of the , ionic, covalent, or metallic bonds
Ionic Bonds are where the extra outer electron of one atom transfers to the other atom.
Covalent Bonds are where the outer electron of one atom takes the open path to the nucleus (negative valance) of a 2nd atom.
Metallic Bonds are formed from the attraction between free electrons and fixed positively charged metallic atoms. Metallic bonds extend over the entire molecular structure.
Substance Properties
Steel Conducts electricity as solid and liquid
Propane Low melting point
Calcium Chloride Conducts electricity when dissolved in water
Water Solid form is brittle, melts at 0C
Steel is an alloy of carbon, iron and other things
Propane = C3H8 C4- H+
Calcium Chloride = CaCl2 = Ca2+ Cl-
Water = H2O = OH- and H+
Can someone please show me how to solve this?
Answer:
4.38 Grams of C
Explanation:
How many grams of C are required to react with 52.6grams of Fe2O2?
Fe2O2 + C = 2Fe + CO2
Ratio 1:1
Fe2O2 = 144 Molar Mass
Fe2O2 52.6/144 = 0.365Moles of Fe2O2
Fe =56grams/mole = Charge 2+, 3+
O = 16grams/mole = Charge 2-
C = 12grams/mole = Charge 4+
So Ratio is 1:1 so we only need 0.365Moles of C so 4.38grams
What is the value of log 43? Use the calculator. Round your answer to the nearest tenth.
Answer:
1.6
Explanation:
log 43 = 1.6335
B, 1.6
Explanation: E21
Any moving object has _______________ energy A.kinetic B.potential C.gravitational potential
Answer:
Kinetic
Explanation:
potential means it has the POTENTIAL to move, gravitational potential energy is when an object isn't moving but the it turns into gravitational kinetic energy since gravity causes it to move. since the object in question is already in motion it proves kinetic energy as the answer.
How do cold temperatures extend the amount of time an organ can be
detached from the body before a transplant?
A. Cold temperatures provide the organ
with
oxygen.
B. Cold temperatures increase cell replication in the organ.
C. Cold temperatures slow the rate at which cells die.
D. Cold temperatures increase the amount of oxygen the organ
needs.
Answer:
cold temperatures slow the rate at which the cells die.
Explanation:
the answer is c
The correct answer is option C. Cold temperatures slow the rate at which cells die.
At what temperature do cells die cold?Temperatures between 46 ° C and 60 ° C are associated with irreversible cell damage proportional to exposure time (8, 9). Protein coagulation occurs quickly between 60 ° C and 100 ° C, causing irreversible damage to important cytosol and mitochondrial enzyme-nucleic acid-histone complexes.
Cold temperatures can also slow down cell growth by preventing cell hypertrophy. In extreme situations, Prolonged exposure to freezing temperatures can cause intracellular fluids to begin to freeze, forming crystals that penetrate the membrane and eventually kill the cells.
Perhaps by reducing elasticity and preventing the uptake of lipid substances into the expanding membrane. Tissue swelling at low temperatures causes lesions in the cell membrane and can cause cold wounds.
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Will Mark Brainly thing please help
Balance this equation. If a coefficient of "1" is required, choose "blank" for that box.
CO + O ₂ → CO ₂
Answer:
2CO + O ₂ → 2CO ₂
Explanation:
CO + O ₂ → CO ₂
Left Side
C = 1
O = 3
Right Side
C = 1
O = 2
So we'll balance the oxygen first
2CO + O ₂ → 2CO ₂
Left Side
C = 2
O = 4
Right Side
C = 2
O = 4
Ok so balancing the O has also balanced the C
What volume of 10,0 M H2SO4 is required to prepare 4.0 L of 0.50 M H2SO4?
A) 0.20 L
B) 0.40 L
C) 0.50 L
D) 1.0L
E) 4.0L
Answer: A) 0.20 L
Explanation:
Molarity of a solution is defined as the number of moles of solute dissolved per Liter of the solution.
According to the neutralization law,
[tex]M_1V_1=M_2V_2[/tex]
where,
[tex]M_1[/tex] = molarity of stock [tex]H_2SO_4[/tex] solution = 10.0 M
[tex]V_1[/tex] = volume of stock [tex]H_2SO_4[/tex] solution = ?
[tex]M_2[/tex] = molarity of dilute [tex]H_2SO_4[/tex] solution = 0.50 M
[tex]V_2[/tex] = volume of dilute [tex]H_2SO_4[/tex] solution = 4.0 L
[tex]10.0\times V_1=0.50\times 4.0[/tex]
[tex]V_1=0.20L[/tex]
Therefore, the volume of 10.0 M [tex]H_2SO_4[/tex] solution needed to prepare 4.0 L of 0.50 M [tex]H_2SO_4[/tex] is 0.20 L
What is it called when Earth’s magnetic poles change places?
a.
a strike-slip fault
c.
sea-floor spreading
b.
magnetic reversal
d.
continental drift
Answer:
Its b. Magnetic reversal
Explanation:
Answer:
B
Explanation:
i just did it
2
3
4
5
6
What did Virchow observe that led him to determine one of the main components of cell theory?
Answer:
In the year 1850, Rudolf Virchow was studying cells under a microscope, when he observed that cells were dividing and forming new cells. Realizing what he had observed, he understood that living cells reproduce new cells through division
Label each element in the chemical reaction below with the correct oxidation state
NH3 (aq) + 3 HOCl (ax)
NCI () + 3 H20 (1)
Answer:
N = -3
H = +1
O = -2
Cl = +1
Explanation:
The balanced Equation of the reaction above is:
NH3 + 3HOCl ----> NCl3 + 3H2O
Where NH3 is ammonia;
HOCl is Oxochlorate (I) acid
NCl3 is nitrogen trichloride
H2O is water
Nitrogen in both Ammonia and Nitrogen trichloride has an oxidation state of -3. It shares three electrons with each of the three atoms of hydrogen and chlorine
Hydrogen in both Oxochlorate (I) acid and in water has an oxidation state of +1. Each atom shares an election with oxyen in both compounds.
Oxygen in both Oxochlorate (I) acid and water has an oxidation state of -2. Each atom shares two electrons with neighboring atoms; in HOCl, it shares with chlorine and hydrogen, while in H2O, it shares with two atoms of hydrogen.
Chlorine in both Oxochlorate (i) acid and Nitrogen trichloride has an oxidation state of +1. It shares an electron with each of it's neighboring bonded atoms.
Ammonia (NH3) Is base.
How best do you describe Ammonia when dissolved in water
B. Ammonia forms a neutral solution.
C. Ammonia forms a buffered solution.
d. Ammonia acts as base because has OH- and makes water accepts hydrogen.
Answer:
Ammonia accepts a proton from water
Explanation:
Let us quickly remind ourselves of the Brownstead-Lowry definition of an acid. According to Brownstd-Lowry, an acid is any substance that donates hydrogen ions while a base is any substance that accepts hydrogen ions. The hydrogen ion is also known as a proton.
If we look at the behaviour of ammonia in water;
NH3(g) + H2O(l) ----> NH4^+(aq) + OH^-(aq)
We can easily see that ammonia accepts a proton from water (this makes it a Brownstd-Lowry base) and the hydroxide ion is formed in the process. Water functions as the proton donor here.
In the photoelectric effect, what happens when light hits the metal?
A. Electrons are knocked off atoms, causing electricity to flow.
B. Electricity is produced in the metal, causing light to be emitted.
C. Light is reflected off the metal, causing electrons to form.
D. Electrons are pumped into the metal, causing electricity to flow.
Answer: A. Electrons are knocked off atoms, causing electricity to flow.
Explanation:
Photoelectric effect is defined as emission or ejection of electrons from the surface of a metal when a light of certain frequency falls on the surface of the metal. Electrons emitted in this effect can be called photoelectrons.
The light which falls on the surface of the metal must be of sufficiently high frequency called as threshold frequency.
Thus light knocks off the electrons and thus the flow of electrons will result in the production of electricity.
Thus the correct option is Electrons are knocked off atoms, causing electricity to flow.
How many grams of aluminum oxide would be produced from the reaction of 0.25 grams of aluminum with excess oxygen gas?
Answer:
0.472 grams of aluminum oxide would be produced from the reaction of 0.25 grams of aluminum with excess oxygen gas.
Explanation:
First of all, you should know that the balanced reaction that occurs:
4 Al + 3 O₂ → 2 Al₂O₃
Then, by stoichiometry of the reaction (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts are produced in moles:
Al: 4 molesO₂: 3 molesAl₂O₃: 2 molesBeing:
Al: 27 g/moleO: 16 g/moleThe molar mass of the compounds participating in the reaction is:
Al: 27 g/moleO₂: 2*16 g/mole= 32 g/moleAl₂O₃: 2*27 g/mole + 3*16 g/mole= 102 g/moleThen, by stoichiometry of the reaction, the following amounts of mass react and are produced:
Al: 4 moles*27 g/mole= 108 gO₂: 3 moles*32 g/mole= 96 gAl₂O₃: 2 moles*102 g/mole= 204 g
Now it is possible to apply the following rule of three: if 108 grams of Al produce 204 grams of Al₂O₃, 0.25 grams of aluminum how much mass of Al₂O₃ will it produce?
[tex]mass of Al_{2} O_{3} =\frac{0.25 grams of Al*204 grams of Al_{2} O_{3} }{108 grams of Al}[/tex]
mass of Al₂O₃=0.472 grams
0.472 grams of aluminum oxide would be produced from the reaction of 0.25 grams of aluminum with excess oxygen gas.
Answer:
D
Explanation:
Why is rusted iron an example of an oxidation reduction reaction A. Electrons are exchanged B. Heat is generated C. Iron combines with oxygen D. Iron becomes molten E. Oxygen is used
Answer:
C
Explanation:
Oxygen & water form rust
Use the balanced equation below to answer the question that follows
6 CO2 + 6H2O - CH206 +60,
How many moles of water are needed to produce 4 moles of CH420?-
a.4
b. 6
c. 10
d. 24
Which statement best describes the process that the diagrams show?
A solid loses kinetic energy to become a liquid and then becomes a gas
A solid gains kinetic energy to become a liquid and then becomes a gas,
Agas loses kinetic energy to become a liquid and then becomes a solid
Agas gains kinetic energy to become a liquid and then becomes a solid
Answer:Agas loses kinetic energy to become a liquid and then becomes a solid
i believe i had this before but where is the graph
Explanation:
please mark this answer as brainlest
B. A solid gains kinetic energy to become a liquid and then becomes a gas
what is the formula for S5O3
