Answer:
Nucleic acids
Answer:
Nucleic acids is the correct answer hope it helps
8. What is involved in building and running the mine
Answer:
Explanation:
minimizing environmental effects.
ensuring public health and safety.
preserving water quality.
establishing new landforms and vegetation.
removing waste and hazardous material.
stabilizing land to protect against erosion.
help please
If you have 100 grams of a radioactive isotope with a half-life of 10 years:
part a: How much of the isotope will you have left after 10 years?
part b: How much of the isotope will you have left after 20 years?
part c: How many half-lives will occur in 40 years?
Answer:
part a: How much of the isotope will you have left after 10 years?
100/2 = 50 gpart b: How much of the isotope will you have left after 20 years?
50/2 = 25 gpart c: How many half-lives will occur in 40 years?
40/10 = 4Balance the following reaction _ Al + _ Cl, → _ AICI,
Answer:
1 Al + 1 Cl -> 1 AlCl
Explanation:
It is already balanced.
A 2.25 mol sample of oxygen occupies 1.80 L at 25.0°C. What volume will
it occupy with 3.7 moles?
Answer:
2.96 L
Explanation:
We apply the Ideal Gases Law to determine this:
P . V = n . R . T
Firstly we need to know the pressure for the 2.25 moles
P . 1.80L = 2.25 mol . 0.082 L.atm/mol.K . 298K
(We convert T°C to T°K, 25°C + 273 = 298K)
P = (2.25 mol . 0.082 L.atm/mol.K . 298K) / 1.80L
P = 30.5 atm
So now, we apply the pressure value for the new conditions:
30.5 atm . V = 3.7 mol . 0.082 . 298K
V = (3.7 mol . 0.082 . 298K) / 30.5atm = 2.96 L
The nucleus in the center of an atom contains ___ and __ ?
Answer:
protons and neutrons
Explanation:
The nucleus (center) of the atom contains the protons (positively charged) and the neutrons (no charge). The outermost regions of the atom are called electron shells and contain the electrons (negatively charged).
What is the pH of a solution that is 100x more acidic than a solution with a pH of 5?
Answer:3
Explanation:
PLEASE HELP!!!! Assuming a lacrosse ball weighs 5.5 ounces and is made of mainly rubber which has a mass of 82.2 g/mol, how many particles are in a lacrosse ball?
PLeaseee ITS Timedddd + BrainlIESTT
A 6.50 gram piece of aluminum reacts with an excess of oxygen. use the balanced equation below to determine how many grams of aluminum oxide is formed during this reaction.
4 Al + 3 O2 --> 2 Al2O3
a. 662.7 grams of Al2O3
b. 6.1 grams of Al2O3
c. 24.6 grams of Al2O3
d. 12..3 grams of Al2O3
Answer:
d. 12.3 grams of Al2O3
Explanation:
Based on the reaction:
4Al + 3O2 → 2Al2O3
Where 4 moles of Al reacts in excess of oxygen to produce 2 moles of aluminium oxide.
To solve this question we must find the moles of Aluminium. With these moles we can find the moles of aluminium oxide using the reaction:
Moles Al -Molar mass: 26.9815g/mol-
6.50g * (1mol / 26.9815g) = 0.241 moles Al
Mass Al₂O₃ -Molar mass: 101.96g/mol-
0.241 moles Al * (2 mol Al2O3 / 4 mol Al) = 0.120 moles Al2O3
0.120 moles Al2O3 * (101.96g / mol) =
12.3g of Al2O3 are produced.
Right answer is:
d. 12.3 grams of Al2O3Foods that are basic can be identified by what taste
Explanation:
sweet,sour,salty, savoury
Answer: bitter
Explanation:
What is the concentration of a solution with a volume of .45 L that contains .9 moles of Iron (II) chloride?
Answer:
the concentration of the solution is 2 mol/L.
Explanation:
Molarity is defined as the concentration of a solution expressed in terms number of moles of solute per liter of solution.
Mathematically Molarity is expressed as follow;
[tex]Molarity = \frac{Moles \ of \ solute}{Liters \ of \ solution} \\\\[/tex]
Given;
Volume of the solution, V = 0.45 L
Moles of the solute, n = 0.9 moles
The concentration of the solution [tex]= \frac{0.9}{0.45} = 2 \ mol/L[/tex]
Therefore, the concentration of the solution is 2 mol/L.
6. Too much rainwater can cause a slope or hillside to collapse through a process called a
(6 Points)
mudslide
snowslide
o avalanche
storm
Answer:
mudslide
Explanation:
a mass of mud and other earthy material that is falling or has fallen down a hillside or other slope
K,Co, is added to a volume of distilled water. Which of the following statements is correct? (1) The freezing and boiling points increase. (2) The freezing and boiling points decrease. (3) The freezing point increases and the boiling point decreases. (4) The freezing point decreases and the boiling point increases
as- The salt left in the evaporating
basin is often a little dirty
suggest what you could do to
get cleaner salt
Answer:
Pour the filtrate into an evaporating basin. Heat the salt solution gently until it starts to decrepitate .keep eye protection on and do not get too close. Turn off the Bunsen burner and let the damp salt dry in the dish
In evaporation particles of water take energy in the form of sunlight from the surrounding and then convert into vapor phase. Therefore heating is the only technique for getting pure salt.
What is evaporation?Evaporation is a physical process in which the water in liquid state converts to gaseous state at the temperature below its boiling point. Evaporation happens before the boiling process.
Evaporation causes cooling effect in the surrounding. During summer when water is kept in earthen pot water cools, this is because of the evaporation process.
Evaporation is affected by temperature. As the temperature increases the rate of evaporation increases and hence in summer there is more evaporation and hence there is lot more water in air.
Pour the filtrate into an evaporating basin. Heat the salt solution gently until it starts to decrepitate .Turn off the Bunsen burner and let the damp salt dry in the dish.
Therefore heating is the only technique for getting pure salt.
To know more about evaporation, here:
https://brainly.com/question/8169606
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What is the relationship between the streams velocity and the rate of erosion?
Earth science
Answer:
If the water velocity decreases, the rate of erosion increases
Explanation:
What is the name of this hydrocarbon
Answer:
the IUPAC name of the following compound is 2,3 dimethyl pentane!
Science there’s a picture
Answer:
D)
Explanation:
seems like the most logical option out of all listed.
Do anyone kno the answer?
Answer:
I think it's c
Explanation:
because matter and energy come from water I think
GAS LAW:
If 2.2 liter of hydrogen are heated from 0 degrees celsius to 95 degrees celsius at the constant pressure what is the new volume?
Answer:
bh yftd5xsdcfvgbhnjm
Explanation:
How many moles of CO2 gas will be produced in the reaction between baking soda (sodium hydrogen carbonate) and vinegar (acetic acid) if 6 mol of baking soda is reacted in excess vinegar?
Answer:
[tex]6molCO_2[/tex]
Explanation:
Hello there!
In this case, according to the described reaction, we can set up the chemical equation as shown below:
[tex]NaHCO_3+CH_3COOH\rightarrow CO_2+H_2O+CH_3COONa[/tex]
We can evidence the 1:1 mole ratio of baking soda (NaHCO3) to CO2 and therefore the produced moles of latter are calculated as shown below:
[tex]6molNaHCO_3*\frac{1molCO_2}{1molNaHCO_3} \\\\6molCO_2[/tex]
Best regards!
Which statement describes particles of an ideal gas, based on the kinetic molecular theory?
A) Gas particles are separated by distances smaller than the size of the gas particles.
B) Gas particles do not transfer energy to each other when they collide.
C) Gas particles have no attractive forces between them.
D) Gas particles move in predictable, circular motion.
Answer:
The answer is C. Gas particles have no attractive forces between them.
Explanation:
Answer:
I also think the answer is C
"Reduce, reuse, recycle." Give examples of how one or more of
these ideas can be applied to the issues and practices of hydraulic
fracturing for the acquisition of shale gas.
Answer:
Examples of how the ideas can be applied to the issues and practices of hydraulic fracturing for the acquisition of shale gas are;
Reuse; The produced water in obtained from oil and gas well production are reused for fracking, drilling, and if the water is good enough, it can be used for farming
Reduce; The use of recycled brine and water in drilling and fracking process reduces the application of freshwater in the those processes and reduces pollution of natural water sources
Recycle; Recycling involves creating products from waste. In the hydraulic fracturing process approximately 13 percent of the water produced and the flowback water are recycled to be used more than once thereby reducing the net consumption of freshwater
Explanation:
In hydraulic fracturing, also known informally as fracking, is the drilling method used in oil and gas well development process that makes use of water sand and chemical injection through the well bore to open and widen cracks in the bedrock formations in the areas around the wellbore.
A truck can carry a maximum load of 8000 kg.
The truck is loaded with packages each with a mass of 35 kg
correct to two significant figures.
Calculate the maximum number of packages
that the truck can carry.
did any one tell me the answer it's from lower and upper bound chapter
which of the following has the most NaCl (MM=58.44)
a. 50 mL of 4.1 M solution
b. 10 mL of a 1.8 M solution
c. 1 mole
d. 9.35 grams
Answer:
Option C - 1 mole
Explanationa) no of moles of solute = 4.1×0.05
moles = O.205
so the mass of of sodium chloride present is 0.205×58.44
Mass of NaCl = 11.98 g
b) no of moles of solute = 1.8×0.01= 0.018
so the mass of of sodium chloride present is 0.018×58.44
Mass of NaCl = 1.05g
C) number of moles of solute is 1 mole
mass of solute is =58.44g
d) mass =9.35g
So the conclusion is that 1 mole is the correct answer!!!!
1 point
Calculate the [H+] in a solution with a pH of 3.71, and identify the solution
as acidic, basic or neutral. *
1.9x10^-4 M ; acidic
5.12x10^-10; acidic
02.4x10^-3 M ; basic
Answer:
I don't have any idea of this question
A 0.582 mol sample of an ideal gas is at 15°C and 18.8 atm. Calculate the volume for this gas.
Answer: The volume for this gas is 0.732 L.
Explanation:
Given : No. of moles = 0.582 mol
Temperature = [tex]15^{o}C = (15 + 273) K = 288 K[/tex]
Pressure = 18.8 atm
Using the ideal gas equation, volume for the given gas is calculated as follows.
PV = nRT
where,
P = pressure
V = volume
n = number of moles
R = gas constant = 0.0821 L atm/mol K
T = temperature
Substitute the values into above formula.
[tex]PV = nRT\\18.8 atm \times V = 0.582 mol \times 0.0821 L atm/mol K \times 288 K\\V = \frac{0.582 mol \times 0.0821 L atm/mol K \times 288 K}{18.8}\\= \frac{13.761}{18.8}\\= 0.732 L[/tex]
Therefore, it can be concluded that the volume for this gas is 0.732 L.
Which of the following solution(s) would be a buffer? Select all that apply.
a. 100.0 mL of a solution that contains 0.100 M benzoic acid and 0.100 M potassium benzoate
b. 100.0 mL of a 0.100 M propanoic acid to which 50.0 mL of 0.100 M sodium hydroxide has been added
c. 100.0 mL of a 0.100 M formic acid solution
d. 100.0 mL of a solution that contains 0.100 M hydrochloric acid and 0.100 M sodium chloride
e. 100.0 mL of a 0.100 M solution of acetic acid in which 0.100 g of sodium acetate is dissolved
As a buffer is defined as the aqueous mixture of a weak acid and its conjugate base. Or a weak base and its conjugate acid. Thus:
a, b and e would be a buffer.The benzoic acid is a weak acid, its conjugate base is the benzoate ion that comes from potassium benzoate. Thus: a is a buffer.
Propanoic acid (weak acid) reacts with a strong base as sodium hydroxide producing its conjugate base (propanoate ion). Thus, b is a buffer.
Formic acid is a weak acid but its conjugate base, formate ion is not present in the solution. Thus, c is not a buffer.
Hydrochloric acid is a strong acid and sodium chloride a salt. Thus, d is not a buffer.
Acetic acid is a weak acid, and its conjugate base, acetate ion (That comes from sodium acetate) is present in the solution. Thus, e is a buffer.
List the following elements from increasing electronegativity: boron, magnesium, calcium, chlorine, argon
Answer:
The list of elements from increasing electronegativity: Calcium < magnesium < chlorine < argon < boron.
Explanation:
In the periodic table if you move from left to right there would be an increase in the electronegativity of the elements. If you move from the bottom to the top of the groups in the periodic table the electronegativity increases and if u move to the bottom from down its decreases.
Calcium is in the 2nd group below magnesium so calcium is the least electronegative among given elements then magnesium and then chlorine as it is top of magnesium then argon, as it is right to the chlorine, and boron has the most electronegativity as it is above rest of the elements.
Students place paper clips on a desk and then hold a magnet under the desk. What evidence would BEST show that the
magnetic field was able to pass through the desk?
O A The top of the desk is made of a kind of plastic.
OB. The paper clips move when the magnet is moved under the desk.
OC. The magnet they are using is the largest one in the classroom.
OD. The students were able to pick up these paper clips with a magnet.
Answer:
B
Explanation:
got it right on test
Answer:
Yes the correct answer is B
Explanation:
Have a good day!!!
250J of heat was added to a 2 g block of metal. The temperature of the metal was increased by 139.4K. What is the specific heat capacity of the metal?
Use the below equation to calculate specific heat capacity.
Include three decimal places and do not use units in your answer.
cmetal = Q/mΔT
Answer:
0.897
Explanation:
HELP!! ASSIGNMENT DUE TODAY! PLEASE HELP!!! I'LL GIVE 21 POINTS!!!!
Respiration occurs in the cytoplasm and _________ of cells.
mitochondria
im not 100% sure but it makes sense