PLEASE HELP!!
Some organisms are able to carry out both cellular respiration and fermentation. Which process do you think is used more often?
at what point does the radiation start to affect satellites in the atmosphere
When light bounces we call it?
Answer:
when light bounched we call it, reflection
You will be performing many dilutions in this experiment. If John adds 17.51 mL of 6M HCl to 6.36 mL of distilled water, what is the final concentration, in M, of HCl
The molarity of the solution decreases on dilution by adding distilled water. The molarity of the solution of 17.51 ml , 6 M HCl when added to 6.36 ml is 4.4 M.
What is molarity ?Molarity is a common term used to express the concentration of a solution. The molarity of a solution is the ratio of the number of moles of solute to the volume solution in liter.
If a solution of volume V1 ml with M1 molarity is diluted to V2 ml of M2 molarity, then, the relation between the two concentrations is written as:
M1 V1 = M2 V2.
given, M1 = 6 M
V1 = 17.51
the volume after the addition of 6.36 ml water, v2 = 17.51 + 6.36 = 23.78 ml
then M2 = M1 V1/V2
M2 = 6 M × 17.51 ml/ 23.78 ml
= 4.4 M.
Therefore, the molarity of the solution after dilution is 4.4 M.
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How was this organism transported to a new ecosystem in the u.s.
Answer:
ExplaIf the organism was transported to a new ecosystem in the USA, this species will be an invasive species, which will reproduce more, and will not have a specific predator, which may bring an imbalance to the ecosystem.
What are Invasive Species?
Invasive Exotic Species or, simply, Invasive Species is defined as an exotic species that proliferates without control and starts to pose a threat to native species and to the balance of ecosystems that it occupies and transforms in its favor. It can even pose a risk to people.
With this information, we can conclude that caution is needed when introducing a new species into a new ecosystem.
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1 A pump with an 80% efficiency drives water up between two reservoirs through a piping system of total length L = 15 and circular cross -section diameter d = 7 cm. The reservoirs are open to the atmosphere at an ambient temperature of 20 C. The difference in elevation between the free surface can be accounted for by the local loss coefficients Kentrance Kexit 1.0, Kelbow 0.4. If the volumetric flow rate in the system Q = 10 Liter/s, and the surface roughness of the pipe is = 0.15 mm, calculate:
(a) The average water flow velocity in the pipe.
Which component of the steam sterilizer is the coolest?
Answer:
Thermostatic valve
Explanation:
"Is located in the drain line; the drain and the area surrounding it are the coolest areas in the sterilizer. A sensor in the chamber drain measures steam temperature and automatically controls the flow of air and condensate from the sterilizing chamber."
Hope this helps
How many significant figures are in the measured value 69.380
Answer:
4
Explanation:
Significant figures (also known as the significant digits, precision or resolution) of a number in positional notation are digits in the number that are reliable and absolutely necessary to indicate the quantity of something.
Significant numebrs: 69.38
We don't need the extra zero!
Answer:
There are 5 significant figures in 69.380.
Explanation:
The "0" in the thousandths, which is a trailing zero, is significant because it is part of the measurement value.
You need to make a 1:4 dilution of dye in water so that the total volume in test tube one is 60 ml.
From the solution you made in test tube one, you need to make a 1:5 dilution into test tube two so that the total volume is 15 ml.
Find Transfer Volume
Find Diluent
Find TDF
In the serial dilution for the preparation of the dye, the total dilution factor is 1/20
What is dilution of solution?Dilution is the process of preparing solutions of lesser concentration from a more concentrated solution.
In test tube 1:
Total volume = 60 mL
Dilution factor = 1:4
1 parts stock solution is required for every four parts diluent
Total parts = 5
volume of diluent = 4/5 × 60 mL = 48 mL
48 mL of diluent is added to 12 mL of stock solution to prepare the solution in test tube 1.
In test tube 2:
Total volume = 15 mL
Dilution factor = 1:5
1 parts stock solution is required for every five parts diluent
Total parts = 6
volume of diluent = 5/6 × 15 mL = 12.5 mL
12.5 mL of diluent is added to 2.5 mL of stock solution from tube 1 to prepare the solution in test tube 2.
Total dilution factor = 1/4 × 1/5 = 1/20
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Ionic Bonding - Problems
Which of the following could NOT form an ionic compound?
Check all that apply.
Lit and CI-
F- and O2-
Ba2+ and Ag
Mg2+ and S2
Answer:
F- and O2-
Mg2+ and S2
Explanation:
Ionic compounds compose of a metal and a nonmetal. They also compose of a cation(positively charged) and anion(negatively charged). Fluorine and Oxygen are both nonmetals and negatively charged. Barium and silver are both positively charged metals.
A reaction between
a
base and an ammonium salt
Answer:
here's your answer..
Explanation:
mark me brainliest
Based on the observations of how the different forms of salt start mixing with the
water, which type of salt particle do you expect to fully dissolve at the end of the 45
minutes?
Fine
Coarse
Pellet
can ubguys help me to answer it
Which of the following does NOT influences climate change?
Which of the following does NOT influences climate change?
All of these have an effect on climate change
Planting trees
Burning greenhouse gases
driving cars
Answer:
Driving cars
Explanation:
Because driving cars won't effect climate change
A secondary step in the process to produce ultra-pure silicon is to combine silicon tetrachloride with magnesium. How many grams of Si could be produced by reacting 2.00 kg of SiCl4 with excess Mg
The mass of silicon, Si produced from the reaction is 329.41 g
Balanced equationSiCl₄ + 2Mg —> 2MgCl₂ + Si
Molar mass of SiCl₄ = 28 + (35.5×4) = 170 g/mol
Mass of SiCl₄ from the balanced equation = 1 × 170 = 170 g
Molar mass of Si = 28 g/mol
Mass of Si from the balanced equation = 1 × 28 = 28 g
From the balanced equation above,
170 g of SiCl₄ reacted to produce 28 g of Si.
How to determine the mass of Si producedFrom the balanced equation above,
170 g of SiCl₄ reacted to produce 28 g of Si.
Therefore,
2 Kg (i.e 2000 g) of SiCl₄ will react to produce = (2000 × 28) / 170 = 329.41 g of Si
Thus, 329.41 g of Si were obtained from the reaction
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How many moles of nitrogen gas would be produced if 3.40 moles of copper(II) oxide were reacted with excess ammonia in the following chemical reaction? 2 NH₃(g) + 3 CuO (s) → 3 Cu(s) + N₂(g) + 3 H₂O(g)
Explanation
Step 1: balance the equation
Step 2: Place the given mass (mole) above the correspond formula and X above the formula sub whose m B to be determined
Step3: Write the total molar mass of the the substance beliw the formula of each substance.
3.40 X
2NH3 + 3CuO -> 3CuO +N2 +3H2O
3 mol 1 mol
3.40 = X
3mol 1mol
X(3)=3.40 *1mol
3 mol
X= 3.40 *1 mol
3 mol
X=1.3333
This is because i am asked only the mole but if it asks what mass(what gram) we will find the mass
What is cartination in terms of Chemistry
Answer:
did you mean catenation? catenation is the process of bonding of the atoms of same element into a ring of series called a chain.
How are compounds and mixtures different from one another?
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.
Explanation:
brainliest?
Answer:
the things they are made out of
yup thas ittkew efjejkejg ghioen
An ideal gas sample occupies 1.50 L at 25.0 o C and 741 mm Hg. How many moles are there in the sample
Ideal gas law is valid only for ideal gas not for vanderwaal gas. There are so many laws that are deduced from ideal gas equation. There are 0.05mole in the sample occupies 1.50 L at 25.0 o C and 741 mm Hg.
What is ideal gas equation?Ideal gas equation is the mathematical expression that relates pressure volume and temperature.
Mathematically the relation between Pressure, volume and temperature can be given as
P×V=n×R×T
where,
P = pressure of ideal gas= 741 mm Hg= 0.97 atm
V= volume of ideal gas =1.50 L
n =number of moles of ideal gas
T =temperature of ideal gas =25°C =298K
R = Gas constant = 0.0821 L.atm/K.mol
substituting the values
P×V=n×R×T
0.97 atm ×1.50 L=n×0.0821 ×298
number of moles of ideal gas =0.05mole
Therefore, there are 0.05mole in the sample occupies 1.50 L at 25.0 o C and 741 mm Hg.
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Which of the following represents the raw materials of photosynthesis?
a. water and glucose
b. carbon dioxide and water
c. carbon dioxide and oxygen
d. glucose and oxygen
Answer:
B.
Explanation:
B. Carbon dioxide(CO2)and water(H2O)
they represent the raw material of photosynthesis.
hope this helps you
Fill in the coefficients to balance the equation for the chemical reaction that occurs:
_NaCl(aq) + _AgNO3(aq) --> _AgCl(s) + _NaNO3
Answer:
The equation is balanced
Explanation:
NaCl (aq) + AgNO3(aq) ––> AgCl (s) + NaNO3 (aq)
NaCl (aq) + AgNO3 (aq)
Na = 1 , Cl=1 , Ag = 1 , No3= 1
AgCl (s) + NaNO3 (aq)
Ag = 1 , Cl=1 , Na = 1 , No3= 1
Length (miles)
1
1.3
2.
3.2
3
0.9
4
1.8
What is the shortest measurement you made, in SI units? 1 mi = 1.61 km.
A. 3.2 km
B. 7.2 km
C. 1.4 km
D. 5.2 km
Answer:
The answer is 1.4 km
Explanation:
Suzie made the following observations while spending the weekend at her
grandmother's home.
1.
II.
Red beans swell when soaked in water
Cucumber springs water when salt is added to it
She can tell when her sister is around from the scent of her perfume
II.
a. State TWO general deductions which can be made from all these
observations about the nature of matter. (4 marks)
b. Use your deductions in (a) above to explain observation III. (3 marks
Answer:
...
Explanation:
i lowkey dont know what to put, i just need my points srry;(
Which phenomenon best explains the miscibility of heptane (CH3CH2CH2CH2CH2CH2CH3) in pentane (CH3CH2CH2CH2CH3)
The phenomenon that best explains the miscibility of heptane in pentane is that both are non-polar compounds.
Solubility of compoundsSolubility is defined as the ability of a solute or substance to dissolve in a given solvent and at a particular temperature.
Heptane is a straight-chain alkane hydrocarbon that contains 7 carbon atoms. It is a non polar solvent.
Pentane is also a straight-chain alkane hydrocarbon that contains 5 carbon atoms. It is also a non- polar solvent.
Both pentane and heptane are non-polar because the atoms in their molecules share electrons equally. They are able to dissolve each other because they are alike.
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Is it an acid or alkaline that is added to a metal to make it oxide
please answer it is Urgent
Answer:
i am not sure but is it hydrogen oxide
Explanation:
what are the latest e-waste treatment techniques and what are the new innovative methods to recover gold from electrical wastes? Please be thorough
Answer:
Gold is present in electronic wastes like smart phones,TV sets and computers etc.It is necessary to recover gold effectively.Recovering precious metal from electronic waste could help to reduce the environmental impact and cut carbon dioxide emissions
Simply one who think about the target metal without disturbing the other major impurities will be the idea solution for the industrial scale gold recovery from E-waste... In our lab we have developed the process which was patented in India... hope soon it will publish into the public domain.... PROCESS FOR THE RECOVERY OF GOLD FROM MANUALLY DISMANTLED GOLD COATED E-WASTE
Use of both physical and biological processes may help in a better recovery of Gold. Several microorganisms have been discovered which are efficient in solubilising gold from the e-wastes.
Explanation:
hope it helps
An electrochemical cell is based on these two half-reactions and their given standard reduction potential values:
Ox: Sn(s)→Sn2+(aq,1.60molL−1)+2e−E∘anode=−0.14(V)
Red: ClO2(g,0.220bar)+e−→ClO−2(aq,1.60molL−1)E∘cathode=0.95(V)
Compute the cell potential at 25 ∘C .
The potential of the electrochemical cell is 0.03 V.
What is an electrochemical cell?An electrochemical cell is a cell that produces chemical energy from a spontaneous chemical process. Let us recall that cell potential can be obtained from; Ecell = 0.0592/n log K
The cell equation is;
Sn(s) + ClO2(g) ----> Sn^2+(aq) + ClO^2-(aq)
Hence;
K = (1.60) (1.60)/(0.220)
K = 11.6
Therefore;
Ecell = 0.0592/2 log (11.6)
= 0.03 V
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PLEASE HELP ASAP!
What is the volume of 0.4 MH2SO4 is required to neutralize 29 mL od 0.26 M NaOH?
H2SO4(aq)+2NaOH(aq) --> Na2So4(aq)+2H2O(l)
Only answers:
54 ml
29ml
16ml
2.1ml
8.0ml
V1M1c1 = V2M2c2
29 x 0.26 x 1 = V2 x 0.4 x 2
V2 = 9.425
Calculate Density:
Volume=13cm3, Mass=147.55g
Someone please help
Answer:
11.35 g/cm³
Explanation:
If your rounding then 11.4. hope this helps :)
