Answers
Answer: increase an organism's ability to survive and reproduce in an environment.
Explanation: Adaptations are inheritable characteristics that increase an organism's ability to survive and reproduce in an environment. Adaptations can help an organism find food and water, protect itself, or manage in extreme environments.
Related Questions
Which of the following distinguishing electron configurations is characteristi
of noble gases?
O nf14
Ond10
O npo
Ons2
Answers
Answer:
no.3 is your correct answer
How classrooms have become less artificial? Two facts
Answers
Classrooms have grown less artificial by deliberately arranging social activities and games that promote healthy interactions. Students can discuss critical subjects with you in a private setting during class time.
How are classrooms different today?Despite the fact that it's the freshest advancement to schools, remote learning might be trying for the two understudies and teachers. Above projectors and blackboards, previously typical in study halls, have gone in a couple of brief many years, while tablets and workstations have supplanted them as fundamental devices.In a customary training, kids find out about religion, customs, customs, and ceremonies. The students are taught about science, innovation, language capacities, maths, and so forth in the ongoing school system.Innovation based stages like wikis and find out about Docs permit understudies to cooperate on bunch tasks. As innovation offers new techniques for contemplating, imparting, and collaborating, the walls of the homerooms are at this point not an obstruction.Learn more about Modern classroom refer to :
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How many molecules are there in 0.75 mol NH3
Answers
There are 4.5165 × 10²³ molecules are there in 0.75 mol NH₃.
A molecule is a set of or more atoms held together by means of attractive forces referred to as chemical bonds; depending on the context, the term may additionally or won't encompass ions that satisfy this criterion.
1 mole of NH₃ = 6.022 × 10²³
0.75 mole = 6.022 × 10²³ × 0.75 molecule
= 4.5165 × 10²³ molecules.
A molecule is defined as the smallest unit of a compound that consists of the chemical properties of the compound. Molecules are made of agencies of atoms. Describing the shape of an atom, an atom is also subdivided into smaller devices. Protons, electrons, and neutrons are sub-debris of an atom. The smallest particle of a substance has all of the bodily and chemical homes of that substance. Molecules are made up of 1 or extra atoms.
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“surely you have gotten into a car on a cool day and noticed that the metal buckle on your seatbelt feels significantly colder than other things in your car, such as the steering wheel or the center console. Explain why this is” someone please help
Answers
Answer:
The metal buckle conducts heat away from the hand than both the steering wheel and center console.
Explanation:
Good conductors are materials that allow both heat and electricity to flow easily through them. Examples of good conductors are metals.
Poor conductors or insulators are materials which do not allow both heat and electricity to flow easily through them. Examples of insulators are most non-metals, plastics, rubber, wool, wood, etc.
On a cool day a metallic object like the buckle of a car's seatbelt will easily conduct heat away from the hand than other materials inside the car like the seat, the seatbelt, the steering wheel and the centre console as these materials are made from insulators or poor conductors.
Therefore, the metal buckle will feel colder to touch than other things in the car because it conducts heat away from the hand than both the steering wheel and center console.
SECTIONA Answer all the questions, use the answer grid provided. Which of the following branches of chemistry involves the study of chemical nature of living matter? 1 A Biochemistry B Inorganic chemistry C Organic chemistry D Physical chemistry 2. The diagram below shows the chromatogram for a dye. 30
Answers
The separation of the dye into its individual components is based on the principle of adsorption chromatography, where the stationary phase is a solid adsorbent that retains the components of the mixture based on their adsorption properties.
Answer all the questions, use the answer grid provided. The branch of chemistry that involves the study of chemical nature of living matter is Biochemistry. Biochemistry is a branch of science that deals with the study of chemical processes within and relating to living organisms. It is an interdisciplinary field that involves the application of chemistry, biology, physics, and mathematics to the study of biological systems. It focuses on the chemical and physical properties of living things and their interaction with the environment.Biochemistry can be divided into two main categories, which are structural biochemistry and functional biochemistry. Structural biochemistry deals with the study of the chemical structure of biological molecules such as proteins, carbohydrates, and lipids. It involves the analysis of the molecular structure and the physical properties of these molecules. Functional biochemistry, on the other hand, focuses on the study of the chemical reactions and processes that occur within living organisms. It involves the study of metabolic pathways, enzymology, and the regulation of cellular processes. 2. The diagram below shows the chromatogram for a dye.Chromatography is a technique used to separate mixtures into their individual components. It works on the principle that different compounds will move at different rates through a stationary phase under the influence of a mobile phase. In this case, the dye is separated into its individual components by passing it through a stationary phase of paper under the influence of a mobile phase of water.As can be seen from the chromatogram, the dye has been separated into three distinct components, which are represented by the three peaks on the graph. The first peak represents the component that moved through the paper at the fastest rate, while the third peak represents the component that moved through the paper at the slowest rate. The second peak represents the component that moved through the paper at an intermediate rate.
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If 30.0 g of carbon dioxide is consumed what mass in grams of glucose is produced? Answer with 3 significant digits
Answers
21.976g of glucose are produced from 30.0g ofcarbon dioxide.
In the equation of the photosynthesis process, carbon dioxide (CO2) reacts with water (H2O) to produce glucose (C6H12O6) and oxygen (O2):
\(6CO_2+6H_2O\text{ }\rightarrow C_6H_{12}O_6+6O_2\)1st) It is necessary to calculate the amount of carbon dioxide and glucose with the relation of moles in the photosynthesis equation. We can calculate that with the molar mass of carbon dioxide and the molar mass of glucose:
- Carbon dioxide molar mass: 44g/mol
Grams of CO2 in the equation:
6mol x 44g/mol = 246 g of CO2
- Glucose molar mass: 180.2g/mol
Grams of C6H12O6 in the equation:
1mol x 180.2g/mol = 180.2 g of C6H12O6
Now we know that 246g of CO2 are consumed to produce 180.2g of C6H12O6.
2nd) With the calculated values we can use a mathematical Rule of Three to calculate the grams of glucose that are produced from 30.0 of carbon dioxide:
\(\begin{gathered} 246gCO_2-180.2gC_6H_{12}O_6 \\ 30.0gCO_2-x=\frac{30.0gCO_2\cdot180.2gC_6H_{12}O_6}{246gCO_2} \\ \\ x=21.976gC_6H_{12}O_6 \end{gathered}\)So, 21.976g of glucose are produced from 30.0g ofcarbon dioxide.
2.70 mL of 4.00 M KOH is diluted to a final volume of 100.0 mL. What is the resulting concentration?
Answers
Answer: 0.108
Explanation:
use v1s1 = v2s2
here v1 = 2.7ml s1 = 4 M v2 = 100ml s2=?
Calculate the mass percent of KCl in a 0.35 m solution of KCl in water. Assume that the density of water is 1.00 g/mL.
Answers
Answer:
Mass percent of KCl is 2.61 %
Explanation:
Our solute is KCl
Our solvent is water
m means molality (moles of solute in 1kg of solvent)
1 kg = 1000 g
0.35 m means that 0.35 moles of KCl are contained in 1000g of solvent
We determine mass of solute: 0.35 mol . 74.55 g/mol = 26.09 g
Total mass of solution is: mass of solute + mass of solvent
26.09 g + 1000 g = 1026.09 g
Mass percent of KCl = (mass of KCl/ mass of solution) . 100
(26.09 / 1026.09) . 100 = 2.61 %
A 17.6 g sample of magnesium reacts with excess silver nitrate to produce silver metal and magnesium nitrate. The reaction is stopped before all of the magnesium metal has reacted. A total of 70.5 g of solid metal is present. Calculate the mass of each metal in the 70.5 g mixture.
Answers
So, the mass of each metal in the 70.5 g mixture is: Magnesium: 39.1 g and Silver: 31.4 g.
What is reaction?A reaction, in chemistry, refers to a process in which one or more substances are transformed into new substances with different physical and/or chemical properties. Chemical reactions involve the breaking and forming of chemical bonds between atoms or molecules, resulting in the rearrangement of atoms to create new substances. In a chemical reaction, the reactants are the starting materials that undergo the chemical change, while the products are the substances that are formed as a result of the reaction. The chemical equation represents the reactants and products of a chemical reaction and is balanced to show the conservation of mass and the law of conservation of energy.
Here,
The balanced chemical equation for the reaction between magnesium and silver nitrate is:
Mg + 2AgNO3 → 2Ag + Mg(NO3)2
From the equation, we can see that 1 mole of magnesium reacts with 2 moles of silver nitrate to produce 2 moles of silver and 1 mole of magnesium nitrate.
First, we need to calculate how much silver was produced in the reaction. From the equation, we can see that 1 mole of magnesium produces 2 moles of silver, so:
1 mol Mg = 2 mol Ag
The molar mass of magnesium is 24.31 g/mol, so the number of moles of magnesium in the sample is:
=17.6 g Mg / 24.31 g/mol
= 0.724 mol Mg
Since 1 mole of magnesium produces 2 moles of silver, the number of moles of silver produced in the reaction is:
=0.724 mol Mg × 2 mol Ag / 1 mol Mg
= 1.448 mol Ag
The molar mass of silver is 107.87 g/mol, so the mass of silver produced in the reaction is:
=1.448 mol Ag × 107.87 g/mol
= 156.0 g Ag
Now, we can calculate the mass of magnesium that reacted in the reaction:
=17.6 g Mg × (156.0 g Ag / 70.5 g total metal)
= 39.1 g Mg
Therefore, the mass of silver in the 70.5 g mixture is:
=70.5 g total metal - 39.1 g Mg
= 31.4 g Ag
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In chemical reactions, _______ always involves the release of energy during the reaction process.
a) the breaking of bonds
b) the formation of bonds
c) the addition of a catalyst
d) overcoming activation energy
Answers
Answer:
a. the breaking of bonds
Answer:
B
Explanation:
Hey, I am almost positive that the answer to this question is B. The breaking of bonds uses the energy but when they are created it releases energy. I hope this helps, Have a good day!
An atom has 11 protons, 12 neutrons, and 10 electrons. What is the charge?
Answers
Answer:
The atom is Na, sodium with a net charge of +1 because it lost an electron. it usually has 11 electrons.
Explanation:
sodium has a 11 protons with an atomic mass of 23-11=12 neutrons.
To see the number of atoms of an element in a given molecule we need to multiply stoichiometry to the number that is written on the foot of the element that is stoichiometry. Therefore, the charge on atom is +1.
What is atom?Atom is the smallest particle of any element, molecule or compound. Atom can not be further divided. Atoms contains nucleus in its center and electron that revolve around the atom in fixed orbit.
In the nucleus, proton and neutron are present. Electron has -1 charge while proton has +1 charge. Neutron is neutral that is it has no charge. So overall the charge of nucleus is due to only proton, not by neutron.
Since the number of electrons is 10. The number of protons is 11. So, there is loss of one electron, so the charge on atom is +1.
Therefore, the charge on atom is +1.
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Select the statement that best describes how energy is passed from a herbivore to a carnivore. (2 points)
Group of answer choices
Energy from the food sources that both herbivores and carnivores eat is passed directly from them to plants.
Energy from the foods carnivores eat is passed directly to an herbivore.
When an herbivore eats meat, and a carnivore eats the herbivore, energy from the eaten meat is passed indirectly to the carnivore.
When an herbivore eats plants, and a carnivore eats the herbivore, energy from the eaten plants is passed indirectly to the carnivore.
Answers
answer:when an herbivore eats meat and a carnivore eats the herbivore energy from the eatin meat is passed indirectly to the carnivore.
The composition of a compound is 28.73% K, 1.48% H, 22.76% P, and 47.03% O. The molar mass of the
compound is 136.1 g/mol.
I
Answers
The compound has an empirical formula of \(K_2H_2P_2O_8\) and a molecular formula of \(K_2HPO_4\).
The given compound has a percent composition of K = 28.73%, H = 1.48%, P = 22.76%, and O = 47.03%. Its molar mass is 136.1 g/mol. To determine its molecular formula, we need to find its empirical formula and calculate its molecular formula from its empirical formula.The empirical formula is the smallest whole number ratio of atoms in a compound. It can be determined by converting the percent composition of the elements into their respective moles and dividing each by the smallest number of moles calculated. The moles of K, H, P, and O in 100 g of the compound are: K = 28.73 g x (1 mol/39.1 g) = 0.734 molH = 1.48 g x (1 mol/1.01 g) = 1.46 molP = 22.76 g x (1 mol/30.97 g) = 0.736 molO = 47.03 g x (1 mol/16.00 g) = 2.94 molDividing each by the smallest number of moles gives the following ratios: K = 0.734/0.734 = 1H = 1.46/0.734 = 2P = 0.736/0.734 = 1.002O = 2.94/0.734 = 4. The empirical formula of the compound is \(K_2H_2P_2O_8\). To calculate the molecular formula, we need to determine the factor by which the empirical formula should be multiplied to obtain the molecular formula. This can be done by comparing the molar mass of the empirical formula to the molar mass of the compound.The molar mass of \(K_2H_2P_2O_8\) is: \(M(K_2H_2P_2O_8)\) = (2 x 39.1 g/mol) + (2 x 1.01 g/mol) + (2 x 30.97 g/mol) + (8 x 16.00 g/mol) = 276.2 g/mol. The factor by which the empirical formula should be multiplied is: M(molecular formula)/M(empirical formula) = 136.1 g/mol/276.2 g/mol = 0.4935. The molecular formula is obtained by multiplying the empirical formula by this factor: \(K_2H_2P_2O_8 * 0.4935 = K_2HPO_4\). Therefore, the molecular formula of the compound is \(K_2HPO_4\).The molecular formula of the given compound having a composition of 28.73% K, 1.48% H, 22.76% P, and 47.03% O with a molar mass of 136.1 g/mol is \(K_2HPO_4\). The empirical formula of the compound is \(K_2H_2P_2O_8\). The compound's molecular formula is calculated by determining the factor by which the empirical formula should be multiplied to obtain the molecular formula. The factor is M(molecular formula)/M(empirical formula) = 136.1 g/mol/276.2 g/mol = 0.4935. The molecular formula of the compound is obtained by multiplying the empirical formula by this factor, resulting in the molecular formula \(K_2HPO_4\).For more questions on empirical formula
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The correct question would be as
The composition of a compound is 28.73% K. 1.48% H, 22.76% P, and 47.03% O. The molar mass of the compound is 136.1 g/mol. What is the Molecular Formula of the compound?
\(KH_2PO_4\\KH_3PO_4\\K_2H_4P_20_{12}\\K_2H_3PO_6\)
PLEASE HELP 85 POINTS!
Aluminum chloride is a white compound that contains one aluminum atom and three chlorine atoms.
Which model is the best representation of aluminum chloride?
O A.
B.
Al
Cl
Al
Cl
O C.
D.
Cl
Al
Al
Cl
Answers
Answer:
Model B (in image) would the best representation of aluminum chloride.
Explanation:
It's the only model the has three chlorine atoms and one aluminum atom.
Additionally, Cl can only bond once, so it can't be bonded to multiple different atoms. Also, Al needs to have more than one bond to achieve the octet rule.
Bromine pentafluoride BrF5 is a good example of inter halogen molecule
a) What is the Lewis dot structure for bromine pentafluoride?
b) What is the formal charge on bromine?
c) What are the oxidation states on: Br F
d) What is the bond angle in this molecule?
e) What is the geometry of this molecule?
f) This molecule contains POLAR / NONPOLAR bonds. (Circle one)
g) This molecule is POLAR / NONPOLAR. (Circle one)
Answers
Answer:
a) The lewis dot structure is shown in the image attached to this answer
b) The formal charge on each of the atoms is zero
c) bromine has an oxidation state of +5 while fluorine has an oxidation state of -1
d) 90 degrees
e) Square Pyramidal
f) polar bonds
g) polar molecule
Explanation:
The molecule BrF5 has a formal charge of zero. It exhibits an sp3d2 hybridization state with a square pyramidal geometry. The bond angle in the molecule is 90 degrees. It is a molecule of the type AX5E. The oxidation state of bromine is +5 while that of fluorine is -1.
The Br-F bonds are polar. The overall molecule is polar due to asymmetric charge distribution concentrating on the central atom since the molecule is square pyramidal.
Please help with the chart
Answers
Answer:
no
Explanation:
When you add baking soda to vinegar, the mixture fizzes as carbon dioxide gas is produced. Suppose you added water to vinegar before you mixed it with the baking soda. Why will the rate of carbon dioxide production decrease?
Answers
Answer:
because the water would diloute the chemicals in the vinegar
Explanation:
Cu+2AgNO 3 Cu(NO 3 ) 2 +2Ag what are the reactants
Answers
Answer:
Cu + 2AgNo3 is the reactants
WHAT IS THE PERCENT OF HYDROGEN IN CU(C2H3O2)2?
WITH SOLUTION
Answers
Answer:
Hydrogen H 3.330% Carbon C 26.450% Oxygen O 35.234%
Explanation:
Hydrogen reacts with oxygen according to the balanced equation
2H₂ (g) + O2(g) → 2H₂O(g). If X is the number of molecules of H₂ which react,
then the number of O2 molecules reacting is
Answers
Answer:
x/2
Explanation:
X = 2 molecules of H2
For 2 molecules of H2, there's only 1 molecule of O2. Meaning, there's twice the amount of H2, so O2 = x/2 molecules.
I hope I'm understanding this question right.
What is the mass of a baby (in grams) if the babies weight is 6 lbs. 6 oz?
Answers
How many atoms of carbon and oxygen are there in 2.2 g of carbon di oxide .
Answers
Nitrogen and hydrogen react to form ammonia according to the reaction show.
3H2(g) + N2 <- -> 2NH3.
What is the percent yield if 15.68g nitrogen and 10.74 g hydrogen react to form 5.24 g of ammonia?
Answers
The percent yield of the reaction if 15.68 g of nitrogen and 10.74 g of hydrogen react to form 5.24 g of ammonia would be 82.35%.
Stoichiometric problemFrom the balanced equation of the reaction below:
\(3H_2(g) + N_2 < - - > 2NH_3.\)
The mole ratio of hydrogen to nitrogen is 3:1.
The molar mass of hydrogen is 2 g/mol
The molar mass of nitrogen is 28 g/mol
Recall that: mole = mass/molar mass
Mole of 10.74 g hydrogen = 10.74/2
= 5.37 mol
Mole of 15.68 nitrogen = 15.68/28
= 0.56 mol
This means hydrogen is in excess while nitrogen is the limiting reactant. The mole ratio of nitrogen and ammonia is 1:2. Thus, the equivalent mole of ammonia produced would be:
0.56 x 2 = 1.12 mol
Molar mass of ammonia = 17 g/mol
Mass of 1.12 mol ammonia = 1.12 x 17
= 19.04 grams
Percent yield of the reaction = 15.68/19.04 x 100
= 82.35%
In other words, the percent yield of the reaction is 82.35%.
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How could you distinguish a compound from a mixture
Answers
Answer:
Compound are substances which can be formed by chemically combining two or more elements. Mixtures are substances that are formed by physically mixing two or more substances.Identify one disadvantage to each of the following models of electron configuration
Answers
Answer:
The disadvantages or the limitations are as follows:
Dot structures: based on an empirical trend “atoms like octets”, not a rigorous description of the true nature of electrons
Arrow and line diagrams: Does not say much of the possible properties of the molecule.
Written electron configurations: no 3D representation of the molecule or the atom
Explanation:
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If a material is ductile, it is mostly likely a
nonmetal
metal
metalloid
Gas
Answers
Answer:
Explanation:
Which of the following is most likely to be ductile?
a. Metal
b. Nonmetal
c. Metalloid
d. Gas
Answer: a. MetalMetal
calculate the empirical formula of a laughing gas which is 63.62%nitrogen and 36.4% oxygen.
Answers
Answer:
Lets take a 100g sample of Laughing Gas
Since there is 63.62% Nitrogen by mass, we have 63.62 grams of Nitrogen
Since there is 36.4% Oxygen by mass, we have 36.4 grams of Oxygen
Calculating the number of moles of Nitrogen and Oxygen
Moles of N = 63.62/14 = 4.5 moles
Moles of O2 = 36.4/16 = 2.25 moles
Empirical formula = Moles of N/ Moles of O2
Empirical Formula = 4.5 / 2.25
N : O2 = 2 : 1
Therefore, the Empirical formula for Laughing Gas is N₂O
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Calculate the energy needed to increase the temperature of a Valyrian steel dagger of mass 39.0 g by 120°C if the specific heat of the Valyrian steel is 456 J/g°C. Express your answer in calories
Answers
Answer: 5.1 x 10^5 cal
Explanation:
Given that the question asks to calculate the energy needed to increase the temperature of the Valyrian steel dagger, this is a specific heat capacity problem. We can use the formula q=mCΔT to solve for q, the energy needed to create a change in temperature (ΔT) of 120°C. We are given the mass of the dagger (m=39.0 g) and the material's specific heat (456 J/g°C):
q = (39.0 g) * ( 456 J/g°C) * 120°C = 2134080 J (2 significant figures)
The units of gram and celsius cancel out, leaving us with joules. However, the question wants the energy to be expressed as calories (cal). The conversion factor is 1 cal = 4.184 J. Therefore, our final answer is:
2134080 J (1 cal/4.184 J) = 510057.3614 cal (2 significant figures).
Using significant figure rules and scientific notation, the final answer can be represented as: 5.1 x 10^5 cal.
Which statement is true about a neutral solution?
Its pH is less than 7.
Its pH is greater than 7.
It has the same concentration of hydronium and hydroxide ions.
It has a greater concentration of hydroxide ions than hydronium ions.
Answers
Answer:
C. It has the same concentration of hydronium and hydroxide ions.
Explanation:
A neutral solution means that it's a balanced substance that is neither a base nor an acid. For example, pure water is a neutral substance.
(I also did the test for this and I got it correct.)
Hope this helps any future people doing this! :)
Answer:same concentration of hydronium and hydroxide ions (C)
Explanation:
If energy is conserved will the maximum speed of the pendulum depend on the mass, the length, or both? How?
Answers
Answer:
BUDDY YO
Explanation: