Answer:
B.fin position
C.colour of stripes
An envelope could be a source of DNA evidence.
True
False
Answer:
True
Explanation:
DNA can be extracted from bite marks, cigarette buds, postage stamps on envelopes, and envelope flaps for DNA analysis.
Answer:
false. a envelope is what the DNA evidence goes in
Explanation:
Why is carbon dioxide a necessary part of the atmosphere.
Answer:
it gives plants life and plants give us oxygen
The parmo is a dish made from breaded meat and cheese sauce that originated in which english town?.
Answer:
Middlesbrough, North Yorkshire
,,Explanation:
This type of intermolecular force relates to the
big difference in the electronegativities. It exists
when N, O or F atom attracts with hydrogen
atom. Medium strength of attraction is
exhibited
The type of intermolecular force relates to the big difference in the electronegativities and is known as hydrogen bonding.
What are intermolecular forces?Intermolecular forces may be defined as the mechanism that mediates the interaction between the atoms of the molecules. It significantly includes the electromagnetic forces of attraction and repulsion between the atoms.
Some examples of intermolecular forces include London-dispersion force, dipole-dipole interaction, van der Waals interaction, hydrogen bonds, etc. Each one of them possesses a different set of characteristic properties distinctly. Some types of forces are also present in the body of living organisms.
Hydrogen bonding is a characteristic kind of interaction that remarkably includes dipole-dipole attraction between the most electronegative elements like Nitrogen, Oxygen, fluorine, etc., and the hydrogen atom.
Therefore, hydrogen bonding is a type of intermolecular force relates to the big difference in the electronegativities.
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A buffer solution is prepared by adding NH4Cl to a solution of NH3 (ammonia).
NH3(aq) + H2O(I) = NH4+(aq) +OH-(aq0
What happens if Ca(NO3)2 is added?
Shifts to reactants, remain the same, shifts to products.
Please HELP!
I watched the video, but I still don't get it!
I don't know how this works
Answer:
Remains the same
Explanation:
I just got it right on Acellus!
If 40mL of 2.50M HCl neutralizes 500ml. of KOH, what is the molarity of the KOH?
The molarity of the 500 mL KOH solution needed to neutralize the 40 mL of 2.50 M HCl is 0.2 M
Balanced equationHCl + KOH —> KCl + H₂O
From the balanced equation above,
The mole ratio of the acid, HCl (nA) = 1
The mole ratio of the base, KOH (nB) = 1
How to determine the molarity of KOH Volume of acid, HCl (Va) = 40 mLMolarity of acid, HCl (Ma) = 2.5 MVolume of base, KOH (Vb) = 500 mL Molarity of base, KOH (Mb) =?MaVa / MbVb = nA / nB
(2.5 × 40) / (0.15 × Vb) = 1
100 / (Mb × 500) = 1
Cross multiply
Mb × 500 = 100
Divide both side by 500
Mb = 100 / 500
Mb = 0.2 M
Thus, the molarity of the KOH solution needed is 0.2 M
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Pregnant women are often cautioned against cleaning cat litter boxes. This is because Toxoplasma, an intestinal parasite of cats, can be transmitted from infected feces to the expectant mother and ultimately to the fetus. For these reasons, Toxoplasma is considered
....
a noninfectious disease.
a communicable disease.
an addictive disease.
a nosocomial disease.
a zoonotic disease.
a necrotizing disease..
Answer:
A communicable disease
Explanation:
Diseases that can be transferred are known as communicable diseases.
complete and balance the following equation b. na2 co3
the question isnt clear where are the products ir the reactants like __ = ___ + ___
The Scotch broom is an invasive species in California, Oregon and Washington. These shrubs grow quickly after areas that have been cleared of
trees and inhibit reforestation by out-competing native seedling trees. These plants developed a mutation that causes their seed to burst from
their shell when touched by passing animals. As animals brush past these plants, the black dried pods of the Scotch broom explode with a sharp
pop, scattering seeds away from the parent plant.
Which statement below best explains why the Scotch broom is able to out-compete the native plants in that area?
A. Relying on animals to disperse the seeds always results in better reproductive success than other methods of seed dispersion.
B. Specialized seed pods allow seeds to be dispersed farther and into less crowded areas promoting reproductive success.
C. The crackling sound of seed pods exploding promotes reproductive success by attracting the animals that are responsible for scattering
seeds.
D. Genetic mutations have caused the plant to be more resistant to cold temperatures allowing them to survive and reproduce all year
long.
Based on the illustration, the statement that best explains why the Scotch broom is able to outcompete the native plants in the area would be the specialized seed pods that allow seeds to be dispersed farther and into the less crowded areas.
Reproductive successDifferent organisms have different ways of behaving to ensure the survival of their propagules or offsprings.
In the case of the Scotch broom, the ability of the pods holding the seeds to burst open and catapult the seeds far away from the parent plant is a reproductive strategy to ensure that their seeds are well dispersed.
By doing so, the propagules of the plant will reach new areas where they do not exist before and as such, able to spread quite quicker than the native plants.
More on reproductive success of plants can be found here: https://brainly.com/question/811305
what are the products for the following equation?
LiBr + F ->
[tex]\qquad\qquad\huge\underline{{\sf Answer}}♨[/tex]
Here's the balanced chemical equation for above reaction ~
[tex]\qquad \sf \:LiBr + F \rightarrow Li F + Br[/tex]
Here, fluorine is more more more reactive than Bromine, therefore it replaces Bromine from its compound and forms Lithium floride.
How many atoms in total are present in sucrose C12H2011 weighs 1.4 mg
Answer:
2.46×10²¹atoms
Explanation:
[tex]molar \: mass \: of \: the \: sucrose = 12(12) + 22(1) + 11(16) \\ = 144 + 22 + 176 \\ = 342g {mol}^{ - 1} \\ mole = \frac{1.4 \times {10}^{ - 3} }{342} \\ = 4.09 \times {10}^{ - 6} \\ number \: of \: atoms = 4.09 \times {10}^{ - 6} \times 6.022 \times {10}^{23} \\ = 2.46 \times {10}^{21} atoms[/tex]
3. Which of the following statements is true?
a. A lithium ion has a 1+charge because it gained
one electron.
b. A magnesium ion has a 2-charge because it
lost two electrons.
c. A sulfide ion has a 2-charge because it gained
two electrons.
d. A chloride ion has a 1+ charge because it gained
one electron.
e. An aluminum ion has a 3-charge because it lost
three electrons.
c. A sulfide ion has 2- charge because it gaines two electrons
thia statement is true.
which molecule can't be exist?
A)NCl3 B)OF6 C)ONF3 D)PCl3
Answer:
OF6
Explanation:
Oxygen and fluorine have almost the same electronegativity, so oxygen isn't able to donate enough electron density to fluorine to form OF6. Atomic size. There isn't enough room around an oxygen atom for six fluorine atoms.
:-befrank
ANSWER FAST PLS ILL GIVE BRAINLY 5. What are animals called that make their homes underground?
grazers
reptiles
burrowers
meat-eaters
Answer:
burrowers
Explanation:
1. -A mixture of aluminum metal and chlorine gas reacts to form aluminum chloride (AlCl3): 2Al(s) +
3Cl2(g) → 2AlCl3(s). How many moles of aluminum chloride will form when 5 moles of chlorine gas react
with excess aluminum metal?
Answer:
3.33 moles
Explanation:
We know that our limiting reactant is chlorine so we just have to figure out how much of the product aluminum chloride (AlCl3) would be formed from 5 moles of chlorine gas. As we can see in the balanced equation, the mole ratio of chlorine gas (Cl2) to aluminum chloride is 3:2 based on the coefficients of the species. All you have to do from here is divide the amount of moles of chlorine gas by its own coefficient and then multiply the number you receive by the coefficient of AlCl3.
5/3=1.66
1.66*2=3.33
What is the pH of a 4.5 x 10^-3M HI solution?
A) 0.1
B) 4.8
C) 3.2
D) 2.4
ID: A
8. Gold is reacted with chlorine gas according to the reaction 2 Au + 3Cl2 → 2 AuClz. Use the data in the table
to determine the percent yield of gold chloride.
Mass of Gold
Mass of Chlorine Theoretical Yield Actual Yield
39.4 g
?
35.2 g
21.3 g
a. 60.7%
b. 54.1 %
c. 58.1 %
d. 51.4 %
9. How many moles of Al would be produced from 20 moles of AlO3?
A. The percentage yield of gold chloride is 58%
B. The number of mole of Al produced is 40 moles
A. How to determine the percentage of gold2Au + 3Cl₂ → 2AuCl₃
Molar mass of Au = 197 g/mol
Mass of Au from the balanced equation = 2 × 197 = 394 g
Molar mass of Cl₂ = 2 × 35.5 = 71 g/mol
Mass of Cl₂ from the balanced equation = 3 × 71 = 213 g
Molar mass of AuCl₃ = 197 + (3×35.5) = 303.5 g/mol
Mass of AuCl₃ from the balanced equation = 2 × 303.5 = 607 g
We'll begin by determining the limiting reactant
From the balanced equation above,
394 g of Au reacted with 213 g of Cl₂
Therefore,
39.4 g of Au will react with = (39.4 × 213) / 394 = 21.3 g of Cl₂
From the above, both Au and Cl₂ are limiting reactant.
Next, we shall determine the theoretical yield.
From the balanced equation above,
394 g of Au reacted to produce 607 g of AuCl₃
Therefore,
39.4 g of Au will react to produce = (39.4 × 607) / 394 = 60.7 g of AuCl₃
Thus, the theoretical yield of AuCl₃ is 60.7 g
Finally, we shall determine the percentage yield.
Actual yield = 35.2 g
Theoretical yield = 60.7 g
Percentage yield =?
Percentage yield = (Actual / Theoretical) × 100
Percentage yield = (35.2 / 60.7) × 100
Percentage yield = 57.99%
Percentage yield ≈ 58%
B. How to determine the mole of Al producedBalanced equation
2Al₂O₃ → 4Al + 3O₂
From the balanced equation above,
2 moles of Al₂O₃ produced 4 moles of Al
Therefore,
20 moles of Al₂O₃ will produce = (20 × 4) / 2 = 40 moles of Al
Thus, 40 moles of Al were obtained from the reaction.
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If one 330 mL Coca-Cola contains 170 grams of dissolved C*O_{2} how many H^ + ions are made if 70% of the dissolved C*O_{2} reacts completely with water until it is a simple carbonate ion (CO 3 ^ 2- ) ?
Please help me!!!
Answer:
bu bir kimya sorusu sanırim
Which is older? Dinosaurs or Grasshoppers?
Answer:
i think grass hopper
Explanation:
answer my question i am am brainiest
If 162.35 g aluminum hydroxide are dissolved in 6750 mL of solution, what is the concentration of the solution?
If 162.35 g aluminum hydroxide are dissolved in 6750 mL of solution, the concentration of the solution is 0.308M
How to calculate concentration?The concentration of a solution can be calculated using the following formula:
Molarity = no of moles ÷ volume (L)
However, the number of moles in 162.35g of Al(OH)3 must be calculated as follows:
Molar mass of Al(OH)3 = 78g/mol
no of moles = 162.35g ÷ 78mol
no of moles = 2.08mol
Molarity = 2.08mol ÷ 6.75L
Molarity = 0.308M
Therefore, if 162.35 g aluminum hydroxide are dissolved in 6750 mL of solution, the concentration of the solution is 0.308M.
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A solution was made using NaOH, the pH of the solution was found to be 11.452. What is the concentration of the hydroxide ion, OH^- in this solution
Answer:
i think it is 0.002831392
Explanation:
pOH = 14 - 11.452 = 2.548
pOH = -log(OH)
2.548 = -log(OH)
10^(-2548) = 0.002831392
Anyone know this? Cuz I don’t this one is
Answer:
its legislative.
What is the most significant solute in determining the distribution of water among fluid compartments
Answer:
Sodium (Na+)
Explanation:
Volume status is regulated through the monitoring of systemic solute per unit volume, or osmolarity. Sodium, the most prominent electrolyte 'solute' in extracellular fluid, is used to monitor extracellular osmolarity. A disproportionate loss of water relative to sodium results in a concentrating osmolar effect.
What type of probes physically land on the surface of a planet or moon?
Answer:
Here are three types of probes that land on space physically. Interplantery, orbiters, and landers.
Explanation:
These are the ones that collect data and other stuff from space.
help please giving brainliest!
Answer:
a reaction that can occur in both forward and reverse directions at the same time.
Explanation:
This is because ↓
A reversible reaction is a reaction in which the conversion of reactants to products and the conversion of products to reactants occur simultaneously. A and B can react to form C and D or, in the reverse reaction, C and D can react to form A and B.
Hope this helps =)
what are the basic elements of environment
Answer:
the basic elements of environment are lithosphere, hydrosphere, atmosphere and biosphere.
Explanation:
HELP ANYONE PLEASE ASAP TYY!!!
What amount of heat is required to increase the temperature of 75.0 g of water from 22.3˚C to 36.1˚C?
Answer:
4332.5 j
Explanation:
Specific heat of water is 4.186 j /g-C
4.186 j / g-C * 75 g * (36.1-22.3 C) =
The interstitial fluid is generally poor, while the plasma is generally rich in ---------. A. Protein B. Sodium and chloride ions C. Hydrogen ions D. Carbohydrates
Answer:
B Hydrogen Ions is answer
How does pathogen infection result in the occurrence of fevers in a host?
Edema caused by the pathogen raises the body temperature..
The pathogens break down the host's hypothalmus..
Pyrogens produced by the pathogen alter the host thermostat.
The interaction between PAMPs and PRPs causes a respiratory burst.
Answer:
The answer is Edema caused by the pathogen raises the body temperature. :)
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