Answer:
Punnett squares do not provide accurate predictions on the distribution of phenotypes in offspring. ... This makes it difficult to make predictions regarding Down's syndrome since it cannot predict the prevalence of the offspring's genotypes about a population.
Explanation:
Limitations of Punnett squares as models of inheritance include the lack of information about likely variation in small samples such as individual families and the lack of information about population prevalence of parental genotypes (so no predictions can be made about population prevalence of offspring genotypes.
What is the mass of 10.5 moles of H20?
Answer:
180g
Explanation:
So, 10 mole of water will weigh (18x10) = 180g.
Which of the following is a correct statement about water?
A)Hydrogen bonding causes water to be strongly cohesive.
B)Hydrogen bonding causes water to have a low surface tension.
C)Water is a universal solvent because polar and nonpolar solutes can dissolve in it.
D) Water is less dense as a liquid than as a solid because of changes in bond structure.
Answer:
D) Water is less dense as a liquid than as a solid because of changes in bond structure.
Explanation:
I hope I was able to help!
Have a nice day :)
The correct statements about water is that hydrogen bonding causes water to be strongly cohesive and is less dense as a liquid and solid.
What is hydrogen bonding?It is bonding in between the hydrogen atom and most electronegative atoms like flourine, chlorine, oxygen atoms, etc.
In water molecule hydrogen bonding is present in the form of intermolecular as well as intramolecular force and makes it more cohesive to get attracted towards each other.Water molecule has a high surface tension, as a result of which it is able to form a drop of water.Water is not a universal solvent, else it is a polar solvent and able to dissolve only polar molecules.It is also true that water is less dense as a liquid than as a solid because of changes in bond structure.Hence water is less dense as a liquid than as a solid because of changes in bond structure and hydrogen bonding causes water to be strongly cohesive.
To know more about water, visit the below link:
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Question: What happens with the electrons between two atoms in a polar covalent bond?
a) Electrons are equally shared
b) Electrons are transferred
c) Electrons are unequally shared
d) Electrons become mobile in a ‘sea of electrons’
Answer:
c) Electrons are unequally shared
Calculate the volume of an
object with the following
dimension:
4.0 cm x 1.2 cm x 2.5 cm
[?] cm3
Answer: The volume of given object is 12.0 [tex]cm^{3}[/tex].
Explanation:
Given: Length = 4.0 cm
Width = 1.2 cm
Height = 2.5 cm
Formula to calculate the volume of such an object is as follows.
[tex]Volume = length \times width \times height[/tex]
Substitute the values into above formula as follows.
[tex]Volume = length \times width \times height\\= 4.0 cm \times 1.2 cm \times 2.5 cm\\= 12.0 cm^{3}[/tex]
Thus, we can conclude that the volume of given object is 12.0 [tex]cm^{3}[/tex].
How can you tell if an element has been reduced? A. The number of its electrons has not changed in the reaction, B. It has a positive oxidation state in the product, C. It has more electrons in the product than in the reactant, D. It has fewer electrons in the product than in the reactant.
Answer:
C. It has more electrons in the product than in the reactant
Explanation:
A type of reaction is called REDOX or oxidation-reduction reaction. In this reaction, substances (element or compounds) involved are either oxidized or reduced. To be oxidized means that a substance has lost electrons and hence, have a positive oxidation state in the product side.
On the other hand, reduction means that the substance has gained or accepted electrons, and hence has a reduced oxidation state in the product side. In other words, a reduced element will have more electrons in the product than in the reactant.
For example, in the following equation:
A + B = A- + B+
A is said to be reduced because it has more electrons (1) in the product than in the reactant (0).
help chemistry pls answer
How many silicons atoms are there in 0.0356 moles of silicon
Answer:
2.14 × 10²² atoms Si
General Formulas and Concepts:
Atomic Structure
Reading a Periodic TableMolesStoichiometry
Using Dimensional AnalysisExplanation:
Step 1: Define
Identify
[Given] 0.0356 mol Si
[Solve] atoms Si
Step 2: Identify Conversions
Avogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.
Step 3: Convert
[DA] Set up: [tex]\dipslaystyle 0.0356 \ mol \ Si(\frac{6.022 \cdot 10^{23} \ atoms \ Si}{1 \ mol \ Si})[/tex][DA] Multiply [Cancel out units]: [tex]\dipslaystyle 2.14383 \cdot 10^{22} \ atoms \ Si[/tex]Step 4: Check
Follow sig fig rules and round. We are given 3 sig figs.
2.14383 × 10²² atoms Si ≈ 2.14 × 10²² atoms Si
Consider the reaction 4FeS2 + 11O2 → 2Fe2O3 + 8SO2. If 8 moles of FeS2 react with 15 moles of O2, what is the limiting reactant? (3 points)
Select one:
a. FeS2
b. Fe2O3
c. O2
d. SO2
If 8 moles of FeS2 react with 15 moles of O2, the limiting reactant is O2.
WHAT IS LIMITING REACTANT:A limiting reactant is reactant that is totally consumed when the chemical reaction is completed.According to this question, the following reaction was given: 4FeS2 + 11O2 → 2Fe2O3 + 8SO2.4 moles of FeS₂ reacts with 11 moles of O₂
This means, 8 moles of FeS₂ will react with (8 × 11/2) = 22 moles of O₂15 moles of O₂ is available. In comparison with 22 moles, O₂ is in short supply .
Therefore, If 8 moles of FeS2 react with 15 moles of O2, O₂ is the limiting reagent.
Learn more about limiting reactant at: https://brainly.com/question/14225536
Answer:
They are right it's O2
Explanation:
I accidently rated it low but it's 100% right
How many moles of aluminum oxide are produced when 6 moles of oxygen gas react?
4Al + 3O2 → 2Al2O3
Answer:
4 moles of aluminum and 6 moles of oxygen are produced
If the change in velocity increases, what happens to the acceleration during the same time period?
Acceleration decreases.
Acceleration increases.
Acceleration becomes negative.
Acceleration becomes steady.
Answer:
Acceleration decreases
Answer:
its b
Explanation:
Please somone help me with a chemistry question brainliest to whoever answers correctly and 20 points
Answer:
289.15k is the answer buddy
Calculate the molarity of the following solution: 1.0 mole of KCl in .75 L of solution.
1.3 M
2.0 M
0.750 M
99 M
Answer:
1.3 M
Explanation:
1 mole= Concentration * Volume
1 mole=C*0.75 L
C=1.3 M
A 16.4L sample of NO2(S) has a density of 1.89 g/L. What is the mass of the sample NO2(s)?
A) 31.0 grams
B) 14.5 grams
C) 8.68 grams
D) 0.115 grams
Answer:
A. 31.0
Explanation:
Remember the formula [tex]Density = \frac{mass}{Volume}[/tex], or [tex]D=\frac{m}{V}[/tex].
The problem tells us that the density is 1.89 g/L, and that the volume is 16.4 L.(Remember that if the units are in some form of liters, it is volume, similar to how if the units are in grams, it is mass.)
Plug in the numbers for density and volume, and you will get:
[tex]1.89=\frac{m}{16.4}[/tex]
Then, multiply both sides by 16.4 to get:
m = 30.996 g ≈ 31.0 g
Hope this helps!
How do you find the number of moles of copper in copper gluconate? In my experiment I used 1.4 g of copper gluconate, and ended up with 0.1 g of copper.
Answer: 0.0016 moles of copper are present in copper gluconate
Explanation:
The number of moles is defined as the ratio of the mass of a substance to its molar mass.
The equation used is:
[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}[/tex] ......(1)
Given mass of copper = 0.1 g
Molar mass of copper = 63.55 g/mol
Plugging values in equation 1:
[tex]\text{Moles of copper}=\frac{0.1g}{63.55g/mol}=0.0016 mol[/tex]
Hence, 0.0016 moles of copper are present in copper gluconate
please help mee 11-14
Answer:
11. A)outward
12. B) inward
13. B) opaque
14. I really don't know (sorry)
Explanation:
What unit is used for atomic mass
In which classification of matter are the components chemically combined?
A metal
B compound
C mixture
D Metalloids
how many moles are in 150 grams of water
Answer:
Solution given:
H20=1+1+16=18grams
we have
1 mole of water =18grams
now
150grams of water=1/18*150=25/3 =8.33mole.
150 grams of water =8.33mole.
Note:
mole =given mass/actual mass of molecule/atom
1 mole of water is 18 grams.
Then,
150 grams of water,
→ 1/18 × 150
→ 25/3
→ 8.33333 . . .
Hence, 150 grams of water is 8.3 moles.
What is used to describe the conditions of a reaction at equilibrium?
O A. A reaction-rate constant
O B. An activation energy
O C. An ideal gas constant
O D. An equilibrium constant
SUBM
What is the IUPAC name of linkage isomer of [(NH3)3Pt(NO2)]Cl ? (remember it's linkage isomer)
triamminechloroplatinum(II) nitrite
Calculate the pressure kPa of 0.421 mole of helium gas at 254 degree celsius when it occupies a volume of 3.32 L.
What type of molecule is shown below?
A. Ether
B. Alcohol
C. Aldehyde
D. Ketone
The given molecule is an aldehyde with the formula HCHO. It is the simplest and primary aldehyde . Hence, option c is correct.
What are aldehydes ?Aldehydes are a class of organic compounds that contain a carbonyl group (a carbon double-bonded to an oxygen) at the end of a carbon chain. The general formula for an aldehyde is RCHO, where R is a substituent or side chain attached to the carbonyl group.
Aldehydes are often characterized by their distinctive odor, which can be described as pungent and irritating. Some common aldehydes include formaldehyde (used in building materials and as a disinfectant), acetaldehyde (found in alcoholic beverages), and benzaldehyde (used in food flavorings).
Aldehydes are important intermediates in many chemical reactions, and they are used in a variety of industrial and laboratory applications. They can be synthesized by the oxidation of primary alcohols or by the partial oxidation of hydrocarbons. The given compound is formaldehyde HCHO.
Find more on aldehydes:
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[tex]what \: is \: acid \: \: \: {?} [/tex]
meaning:An acid is a chemical substance, usually a liquid, which contains hydrogen and can react with other substances to form salts. Some acids burn or dissolve other substances that they come into contact with.
Answer:
Hope it help you#CarryOnLearningI need chemistry help text me at (951) 897-8325 PLEASE
The expression for the equilibrium constant for the reaction:
Ba3N2 (aq) + 6 H2O(1)-
3 Ba(OH)2 (aq) + 2 NH3 (9)
Answer:
[tex]Kc\frac{(Ba3N2)(H2O)^6}{(Ba(OH)2)^3(NH3)^2}[/tex]
Explanation:
Because kc equals products/reactants hope this helps :)
14. Ionic compound is brittle solid but break
apart when hit this property is due to...
A) Dissolved in water
B) Arrangement of similar ions
C) Ions do not move
D) Arrangement of opposite ions
Answer:
A
not sure of answer ndhfhfjfjcjfjfj
2. When we lift a stool, its ____________
A) gravitational potential energy is increased
B) gravitational potential energy is decreased
C) kinetic energy is decreased
D) gravitational potential energy remains unchanged
A.)
Standing on an elevated ledge would be more potential energy than standing on the ground. Same applies for anything else -- Including a chair!
Sketch 10 atoms of aluminum and 6 molecules of oxygen gas in the container on the left. In the right container, sketch the contents after the reaction is complete.
Answer:
Sketch 10 atoms of aluminum and 6 molecules of oxygen gas in the container on the left. In the right container, sketch the contents after the reaction is complete.
Explanation:
The balanced chemical equation of the reaction is:
[tex]4Al + 3 O_2 -> 2Al_2O_3[/tex]
Though there are 10 atoms of Al, only four atoms will react with every three molecules of oxygen.
Hence, right side the product formed is --- Al2O3.
What is the gram molecular mass of a compound if 5 moles of the compouns has a mass of 100 grams?
Answer:
20 grams.
Explanation:
5 mols of a compound has a mass of 100 grams
1 mol of the same compound has a mass of 100/5 = 20 grams
which of these elements has two valence electrons?
a. hydrogen (H)
b. barium (Ba)
c. nitrogen (N)
d. krypton (Kr)
e. bromine (Br)
