Answer:
176g
Explanation:
Given :
moles = 5.5
molar mass (sulfur ) = 32u
given mass = ?
Solution:
mole = given mass/molar mass
5.5 = given mass/ 32
5.5×32=given mass
176 g = given mass
Why do a human and monkey look different? the location of the DNA in a cell the type of cells the organization of cell structures the DNA sequence
Answer:
DNA sequence
Explanation:
When we say our DNA is different , we mean the sequence, or coding, of DNA is different
Explain how friction is involved in energy transformation.
Answer:
Friction also prevents an object from starting to move, such as a shoe placed on a ramp. When friction acts between two surfaces that are moving over each other, some kinetic energy is transformed into heat energy.
Friction is involved in energy transformation considering the fact that When friction acts between two surfaces that are moving over each other, some kinetic energy is transformed into heat energy.
Friction also prevents an object from starting to move, such as a shoe placed on a ramp.
In other words, opposing force is known as friction. The type of friction that acts on an object that is not moving is static friction.
Static friction serves as a kind of friction that do occur between two object that are not moving which means the object are static in nature.
Thats why during rainy season while walking on slippery roads people wear shoes with spikes which prevents a person from slipping into mud by the action of friction.
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50 POINTS PLEASE ANSWER QUICK (bad answers will be reported)
Donna is studying phase changes. She claims that since the three phases have different amounts of energy, molecules in substances gain or lose energy only during phase transitions. What is incorrect about this claim?
Molecules gain or lose energy during any temperature change, not just phase changes.
Molecules do not have any energy changes, because they have a set amount of energy all the time.
Molecules are constantly losing energy, no matter what phase change is happening.
Energy levels are not related to phase changes.
Answer: Molecules gain or lose energy during any temperature change, not just phase changes.
Explanation:
If you think of a heating or cooling curve, even when there isn't a phase change, the kinetic energy of the particles is still changing.
During which of the following 50-year intervals has the world's population increased the most? O A. 1850-1900 O B. 1800-1850 O C. 1900-1950 O D. 1950-2000
Answer:1950-200
Explanation:
During 1950-2000 of the following 50-year intervals has the world's population increased the most. Hence, option D is correct.
What is population?The whole number of people or inhabitants in a country or region.
The world's population increased from 2.5 billion in 1950 to around 7.3 billion in 2015 and is expected to continue to rise until 2050/2100 under most UN.
During 1950-2000 of the following 50-year intervals has the world's population increased the most. Hence, option D is correct.
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Which sport is required to have both male and female competitors?
A. Water polo
B. Swimming
C. Hockey
D. Mixed doubles tennis
Answer:
D. Mixed doubles tennis
Explanation:
Mixed doubles tennis is just normal tennis but the 'mixed' means that on both teams there is both one man and one woman.
Milk in a bottle has a mass of 442grams and a volume of 425cubic centimeters. Calculate its density. Write your answer to the hundredths place. gramspercubic centimeter
Answer:1.04 grams per cubic centimeter
Explanation:
For the reaction
2 HCl + Na2CO3 → 2 NaCl + H2O + CO2
179.2 liters of CO2 is collected at STP. How
many moles of NaCl are also formed?
Answer:
16 mol NaCl.
Explanation:
Do the train track method to cancel out all the units except moles of NaCl on top. Remember one mole of any gas occupies 22.4 L at STP.
179.2 L CO2 x 1 mol CO2/22.4 L CO2 x 2 mol NaCl/1 mol CO2
= 16 mol NaCl
What is the name of the functional group that is attached to this hydrocarbon? a carbon atom is single bonded to o h to the right, and h below, left, and above. alkyl halide alcohol carbonyl ketone
The name of the functional group that is attached to the following hydrocarbon is alcohol. Details about functional group can be found below.
What is functional group?A functional group in chemistry refers to a specific grouping of elements that is characteristic of a class of compounds, and determines their chemical properties.
According to this question, a hydrocarbon was given to possess the following formula:
CH3OH
This hydrocarbon is methanol and posseses an alcohol functional group (OH).
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What is the name of the functional group that is attached to this hydrocarbon?
H
│
H ─ C ─ OH
│
H
❌ A) alkyl halide
✔️ B) alcohol❌ C) carbonyl
❌ D) ketone
I Took Question Test And Nice Day.
1. Once tissue fluid enters the lymphatic capillaries, it is called what?
Lymph
Ducts
Organs
Nodes
How would a scientist classify a centipede? 12 points!!! pls help.
A. Arthropod
B. Amphibian
C. Mammal
D. Reptile
(d) Explain the trend in the boiling points in the table above.
Answer:
The BP increases in temperature as you move down the halogen group ( group 7)
Answer:
The trend of boiling points in the the table vary according to the size of the elements atom, if an element has a larger size it will need greater intermolecular forces and heat to break the strong bonds. Therefore Bromine has a larger size followed by chlorine and later fluorine, and this has shown in their boiling points
How do hydrogen ions exist in a solution?
Which of the following, in the solid state, would be an example of a metallic crystal?
1. carbon dioxide
2. barium fluoride
3. diamond
4. iron
5. None of these
Charle's Law
At 27.00 °C a gas has a
volume of 6.00 L. What will
the volume be at 150.00 °C?
Given:
Unknown:
Formula:
Solution:
Final Answer:
Convert temperature to Kelvin
27°C=300K150°C423KApply Charles law
V1T2=V2T16(423)=27V22538=27V_2V2=94LWater is weird because in the solid-state the molecules are ________then when water is in its liquid state all other liquid to get ________when they freeze solid
Answer:
Water is weird because in solid state The molecules are combine then in liquid state they are wide apart.
The results of the gold foil experiment led to the conclusion that an atom is
[tex]\sf\large \blue{\underbrace{\red{Answer⋆}}}:[/tex]
The nucleus of an atom of the element is positively charged and atom has a hollow space inside it.
Explanation:
This experiment was conducted by Rutherford in this experiment. He placed a gold foil and surround it with a screen.
And He exposed gold foil in alpha particles rays in which he noticed that most rays passed through atom which conclude that atom has a large space, some rays get deflected and some reverse their path this show that the positive charge of nucleus of an atom.
What is the molar mass of fluorapatite (Ca5(PO4)3F)?
Answer: 504.3
Explanation: Add the respective weights of each of the elements in the compound together.
This is an impossible formula. If it were real, determine the molar mass of:
Cr4(PO4)3
Answer:
Molar Mass (Cr₄(PO₄)₃): 492.894 g/mol
Explanation:
First, collect the individual molar masses of each element. These values are found on the periodic table under each respective element.
Chromium (Cr): 51.996 g/mol
Phosphorus (P): 30.974 g/mol
Oxygen (O): 15.999 g/mol
The quantity of each element is determined by the subscript next to it. If their is a subscript directly to the right of a set of parentheses, multiply each element within the parentheses by the subscript.
Chromium (Cr): 4
Phosphorus (P): 1 x 3 = 3
Oxygen (O): 4 x 3 = 12
Finally, the total molar mass of the compound is the collective molar masses of each element times the quantity of each element.
Molar Mass (Cr₄(PO₄)₃): 4(51.996 g/mol) + 3(30.974 g/mol) + 12(15.999 g/mol)
Molar Mass (Cr₄(PO₄)₃): 492.894 g/mol
8. Which of the following is NOT true of atoms?
a. They are composed of molecules.
b. They combine to form compounds. c. They make up elements.
d. They are extremely small.
Answer:
The correct answer should be (A)
Explanation:
This is bcos its atoms ions and molecules that make up matter
Example of solvent extraction
Answer:
Liquid–liquid extraction
Explanation:
Using the Equilibrium Solubility Constant
Some carbonate compounds have limited solubility.
MCO3(s) M²+ (aq) + CO3²- (aq)
The solubility constant Ksp for a carbonate compound MCO3, Ksp = 2.5E-7.
A saturated solution of the compound MCO3, is made.
Calculate the concentration of the ions M²+ (aq) and CO32-(aq) in the saturated solution (check the stoichiometry, the
ions will have the same concentration).
Give your answer to three significant figures, using the exponential format, example enter 0.0000382 as 3.82e-5
with no gaps and the -ve e if power is -ve.
Answer:
The solubility product constant (Ksp) describes the equilibrium between a solid and its constituent ions in a solution. The value of the constant identifies the degree to which the compound can dissociate in water. The higher the Ksp, the more soluble the compound is.
Answer:
MCO3(s) M2+(aq) + CO32-(aq) The solubility constant Ksp for a carbonate compound MCO3, Ksp = 2.83E-7. A saturated solution of the compound MCO3, is made.
Explanation:
7. How many molecules are in 4.80 moles of NaCL?
Answer:
280gr of salt
Explanation:
4.80 x ( 22.99 + 35.45) = 280gr
Simple as that
Chloroquine is used to treat malaria. Studies have shown that one dose for a 12 kg child is 3.5 mg/kg of body weight and that 4 doses should be taken per day. How many milligrams of this drug should be given in one day?
Round your answer to the correct number of sig figs.
Answer: 100 milligrams per dose
10 mg per kg. The drug of ten kilos so you do
10 mg * 10 kg = 100 mg per dose
Explanation:
When the atoms that are transition elements form ions, the __ electrons are lost before the _electrons are lost.
Answer:According to the Aufbau principle, the electrons fill the 4s sublevel before beginning to fill the 3d sublevel. However, the outermost s electrons are always the first to be removed in the process of forming transition metal cations.
Explanation:hope its help
how many moles of o2 are needed to produce 34.7g of fe203
Answer:
5.09 moles of Fe is required to react with 3.82 moles of O₂.
0.326 moles of O₂ are needed to produce 34.7 grams of Fe₂O₃.
Reaction stoichiometry
In first place, the balanced reaction is:
4 Fe + 3 O₂ → 2 Fe₂O₃
By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:
Fe: 4 moles
O₂: 3 moles
Fe₂O₃: 2 moles
The molar mass of the compounds is:
Fe: 55.85 g/mole
O₂: 32 g/mole
Fe₂O₃: 159.7 g/mole
Then, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:
Fe: 4 moles ×55.85 g/mole= 223.4 grams
O₂: 3 moles ×32 g/mole= 96 grams
Fe₂O₃: 2 moles ×159.7 g/mole= 319.3 grams
Moles of Fe needed
The following rule of three can be applied: If by stoichiometry of the reaction 3 moles of O₂ react with 4 moles of Fe, 3.82 moles of O₂ react with how many moles of Fe?
moles of Fe= 5.09 moles
Finally, 5.09 moles of Fe is required to react with 3.82 moles of O₂.
Moles of O₂ needed
The following rules of three can be applied: If by reaction stoichiometry 319.3 grams of Fe₂O₃ are formed from 3 moles of O₂, 34.7 grams of Fe₂O₃ are formed from how many moles of O₂?
moles of O₂= 0.326 moles
Finally, 0.326 moles of O₂ are needed to produce 34.7 grams of Fe₂O₃.
Explanation:
Sample Response: According to the passage, a singularity is a single point of densely packed matter that sits at the center of a black hole. In other words, there's a lot of matter packed really tightly together, making it really heavy. This heavy bunch of matter is squished into the tiny space at the middle of a black hole.
Which details did you include in your explanation? You can check more than one answer.
I included text evidence that helped me to figure out what a singularity is.
I simplified the complex language using my own words.
I made a comparison or gave an example to help me explain.
I used synonyms and antonyms to help me explain.
The details included in the passage are I simplified the complex language using my own words. The correct option is B.
What is a passage?A passage is a group of paragraphs which talks about a topic. We have to read the passage and then answer the question.
The given passage talks about black hole, it is a center of powerful gravitational force
Thus, the correct option is B. I simplified the complex language using my own words.
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How old is a piece of cotton cloth if the half-life of carbon-14 is 5,730 years, and the carbon-14 composition of the cloth is 22 percent that of living plants?
Question 1 options:
A)
1,813 years
B)
1.21 × 10-4 years
C)
12,517 years
D)
1.21 × 10-4 years-1
The half-life is the time used by the concentration to get half of its initial value. The cotton cloth is 5097 years old.
What is radioactive decay?Radioactive decay is the reduction of the initial concentration to the half value. The exponential decay can be given as:
[tex]\rm N(t) = N_{0}e ^{-\lamda t}[/tex]
The decay constant is calculated as:
[tex]\begin{aligned} \lamda &= \rm \dfrac {ln (2)}{t\frac{1}{2}}\\\\&= \dfrac{\rm ln(2)} {5730}\\\\&= 0.0001209\end{aligned}[/tex]
Solving further:
[tex]\begin{aligned}0.22 &= \rm e^{-0.0001209 \times t}\\\\\rm ln 0.22 &= -0.0001209 \times t\\\\\rm t &= \rm \dfrac{log 0.22}{-0.0001209}\\\\&= 5097 \;\rm years\end{aligned}[/tex]
Therefore, the cotton cloth is 5097 years.
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At equilibrium,
a, the forward reaction rate is lower than the reverse reaction rate.
b. the forward reaction rate is higher than the reverse reaction rate.
c. the forward reaction rate is equal to the reverse reaction rate.
d. po reactions take place.
[tex]{\large{\red{\mapsto{\maltese{\underline{\green{\boxed{\blue{\underbrace{\overbrace{\pink{\pmb{\bf{Answer:}}}}}}}}}}}}}}[/tex]
C. the forward reaction rate is equal to the reverse reaction rate
Chemical equilibrium is dynamic in nature and it can be attained only if the system is a closed one. At equilibrium the forward reaction rate is equal to the reverse reaction rate. The correct option is C.
What is chemical equilibrium?The state of a system in which the measurable properties of the system do not undergo any further noticeable change under a particular set of conditions is called the state of equilibrium. The properties like pressure, concentration, etc. is constant at equilibrium and remain unchanged thereafter.
An equilibrium can be attained from either direction, i.e., from the direction of the reactants as well as from the direction of the products. At equilibrium the rate of forward reaction is equal to that of the backward direction.
In forward reaction, the reactants are converted into products and in backward reaction, the products are changed into the reactants.
Thus the correct option is C.
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Sugar (C12H22011) is a molecular substance. Which of the following properties would you expect it to
have?
a. conducts electricity in water
b. doesn't dissolve in water
c. held together by opposite charges
d. low melting point
Will the following compounds create solutions? Explain your answers.
Solvent Solution? Y/N Explain
Solute
Nal
H₂O
KBr
CH₂
CO₂
CF₁
LICI
CCI
NH₂
H₂O
CO₂
H₂O
The following compounds create solutions that are listed below
What is a solution ?A solution is a homogeneous mixture of one or more solutes dissolved in a solvent.
solvent: the substance in which a solute dissolves to produce a homogeneous mixture
solute: the substance that dissolves in a solvent to produce a homogeneous mixture
1. Nal and H₂O
It will form an ionic solution .
2. KBr and CH4
It will not form a solution
3. CO₂ and CF₄
It will not form a solution
4. LiCI and CCl₄
It will not form a solution
5. NH₃ and H₂O
It will also form a solution and liberate ions of ammonium
6.CO₂ and H₂O
It will form a solution named as carbonic acid
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