Answer:
Since surface water is more easily accessible than groundwater, it is relied on for many human uses. Monitoring the flow rate of streams is important as it helps determine the impact of human activities and climate change on the availability of surface water.
Hope this helps :)
If you evaporated 722 mL of a 7.8 M solution of NaCl, what mass of NaCl would you recover?
Answer:
0.19g NaCl
Explanation:
Multiply the volume by the concentration to get the moles. Then, convert moles to grams which gives you that.
I'm very confused on Solubility and Temperature. Please Help!
Imagine you have two beakers. Both beakers are filled with the same amount of water. The water in both beakers is the same temperature as well. You add 50 g of Substance A to the first beaker, and 50 g of Substance B to the second beaker. After stirring both beakers, there is a small pile of Substance B at the bottom of the second beaker. None of Substance A is visible in the first beaker. Which of the following statements is true?
Select one:
a. Substance B is not soluble in water
b. Substance A is not soluble in water
c. Substance A is less soluble in water than Substance B.
d. Substance A is more soluble in water than Substance B.
What is the mass of 15.7 mol of Nitrogen gas (N2)
Molar mass of N2 = 14×2=28g/mol
Moles of N2 =mass/molar mass
Mass of N2 = moles × molar mass
Mass of N2 = 15.7 × 28 = 439.6 kg
Which combination of carboxylic acid and alcohol produces this ester?
What geologic process could have formed the channel on Mars?
Answer:
How can we decide which geologic process formed the channel on Mars? Students figure out: The channel on Mars was probably formed by water. The rover Curiosity found rocks near the channel that were made up of many smaller rocks.
Explanation:
Hope it helps! Correct me if I am wrong :>
Can you please mark me as brainlest?
Answer:Water
Explanation:
Water could have formed the channel on Mars because some of the rocks that scientists studied from the earth looks similar to the rocks on Mars.
EASY SCIENCE QUESTION
Answer:
utcluclult
Explanation:
ciyiclyipc6ycpicyplciplcylpycioiycciptclyltcj"<&%(""%<(
Answer:
no WAYYYYYYY ITS SO EASY!!111!11
Explanation:
Which squirrel do you think is better suited for the environment, the gray one or the white one? and why
Answer:
The grey squirrel.
Explanation:
This is your answer because the white one would have a harder time to blend in with the tree's and the environment, whilst the grey one is better suited for its environment better due to the fact that it can blend in with the trees, and hide better.
In plant cells, how are chloroplasts and mitochondria related?
Answer:
Mitochondria are the "powerhouses" of the cell, breaking down fuel molecules and capturing energy in cellular respiration. Chloroplasts are found in plants and algae. They're responsible for capturing light energy to make sugars in photosynthesis.
A balance and a graduated cylinder are used to determine the density of a mineral sample.
The sample was measured on the balance at 15.4 g.
The graduated cylinder began with 20 mL of water and measured 22.8 mL of water after the sample was placed into the graduated cylinder.
Density = mass / volume
What is the density of the mineral sample?
What is the correct order for the seaosns of winter spring summer snd fall for the southern hemisphere
Answer:
spring summer fall(autumn) winter
Explanation
spring runs from March 1 to May 31; summer runs from June 1 to August 31; fall (autumn) runs from September 1 to November 30; and. winter runs from December 1 to February 28 (February 29 in a leap year).
Hope I be brian list and hope it helps
plz help in my other question my phone was acting up so it didn’t work but this is the same question.... again this was due yesterday and i don’t understand plzz help!!
Answer:
omg
Explanation:
omg omg omg omg omg omg omg omg omg omg I can't either ehhhhhh
Which mass is made up of 6.02x10^23 atoms? none of these 23 g sodium 42 g krypton 24 g carbon 78 g potassium
Answer:
23 g sodium
Explanation:
In chemistry, one mol (1mol) of a substance equals Avagadro's number or constant (6.02 × 10^23 atoms/particles/molecules).
According to this question in which the mass of different elements were given, the mass of the element that equals 6.02 × 10^23
Using the formula; mole = mass/molar mass
- Sodium = 23g/23g/mol = 1mol
- Krypton = 42g/84g/mol = 0.5mol
- Carbon = 24g/12g/mol = 2mol
- Pottasium = 78g/39g/mol = 2mol
Therefore, from the above illustration, it can be observed that only 23g of sodium contains 1 mol, hence, 23g sodium contains 6.02 × 10^23 atoms.
Which gas would have the fastest rate of diffusion, assuming all of the gases are at the same temperature?
-Ar
-Ne
-He
-Kr
Answer:
Its Neon
Explanation:
Why ? Because Neon is the fastest it can go to 435 m/s and thats one of the fastest element there.
Helium would have the fastest rate of diffusion. Therefore, option (C) is correct.
What is Graham's law?Graham’s law states that the rate of diffusion of a gas is inversely proportional to the square root of the molecular weight of that gas.
According to Graham’s Law, molecules of gas with lower molecular mass at constant pressure and temperature will diffuse faster than the higher molecular mass molecules. This formula is commonly utilized to compare the rates of diffusion of two different gases at the same pressures and temperatures.
[tex]\frac{Rate_1}{Rate_2} =\sqrt{\frac{M_2}{M_1} }[/tex]
Where M₁ is the molar mass of gas 1 while M₂ is the molar mass of gas 2.
The atomic mass of He, Ne, Ar, and Ke is 4, 20, 40, and 83 g/mol. The helium gas has the lowest atomic mass so it has the highest rate of diffusion while Krypton has the lowest rate of diffusion.
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How much power is necessary to do 50 joules of work in 5 seconds?
Answer:
10 watts
Explanation:
Power = Work / time
Power = 50 J / 5 s
Power = 10 watts
The power that is necessary to do 50 joules of work in 5 seconds is 10 watts
What is power?Power is the amount of transfer of energy or converted per unit of time. Power is equal to energy divided by time. The SI unit of power is the watt. The three equations of power are:
P = Et.
P = Wt.
P = V2R.
Work is the transfer of energy from one body by the application of force. Work can be calculated by dividing force into displacement. Joule is the quantity by which work is calculated. The third equation will be used to calculate power.
There are different types of power that are used in doing work. They are legitimate, expert, reward, etc.
Given, 50 joules of work
Time is 5 seconds
Power = Work / time
Power = 50 J / 5 s
Power = 10 watts
Thus, the power is 10 watts.
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A flask contains two gases. The first gas has a pressure of 0.76 atm and the second gas has a pressure of 4,500 Pa. What is the total pressure???
Answer:
2.8
Explanation:
89. What is the pressure of a fixed volume of a gas at 30.0C if it has a pressure of 1.11atm at 15C?
0.555 atm is the pressure of a fixed volume of a gas at 30.0C if it has a pressure of 1.11atm at 15C.
What is an ideal gas equation?The ideal gas equation, pV = nRT, is an equation used to calculate either the pressure, volume, temperature or number of moles of a gas.
According to Ideal Gas Equation,
PV = nRT
Therefore, P ∝ T
P₁T₂ = P₂T₁
Given :
P₁ = ?
P₂ = 1.11 atm
T₁ = 30.0 C
T₂ = 15 C
Solving :
P₁ x 30 = 1.11 x 15
P₂ = 0.555 atm
Hence, 0.555 atm is the pressure of a fixed volume of a gas at 30.0C if it has a pressure of 1.11atm at 15C.
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plz answer quick it had to be done before 12!! (What planet has the hottest average temperature? A. Venus, B. Earth, C. Neptune, D Jupiter)
Answer:
A, Venus.
Explanation:
Temperatures reach up to 460° C on a regular basis.
HELP ME ASAP!!!!!!!!!!!!!!!!!!!!!!!!!!
Answer:
Digestive
Explanation:
if you had to explain to a friend how to balance a chemical equation, what
would you say to them?
Answer:
make sure that the number of atoms on the left side of the equation equals the number of atoms on the right.
Explanation:
A chemical reaction can be balanced by multiplying each side with suitable integers such that the number of each element in the reaction must be equal number on both side.
What is a balanced chemical equation?According to the law of conservation of mass for a chemical reaction, the total mass in the reactant side is equal to the total mass in the product side. Thus, a balanced chemical equation represents the perfect stoichiometry for each reactants and products.
The number of each elements in both side have to be equal in number. If they are unequal on both side, we can balance the reaction by multiplying with suitable integers.
Lets have one example. Consider the given reaction.
[tex]\rm CH_{4} + O_{2} \rightarrow H_{2}O + CO_{2}[/tex]
Here, 4 H are in left side and only 2 in right side. Similarly number of oxygen also not balanced.
The balanced equation requires a coefficient of 2 for water and 2 for oxygen in reactant thus, it can be written as:
[tex]\rm CH_{4} + 2O_{2} \rightarrow 2H_{2}O + CO_{2}[/tex]
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Calculate the specific heat of the substance if 733 J is required to raise the temperature of a 312 gram sample by 15 Celsius?
Answer: Formula: q = mcΔT,
- q is the amount of heat transferred
- m is the mass of the substance
- c is the specific heat capacity of the substance
- ΔT is the change in temperature
q= 733 J
m= 312g
ΔT = 15 °C
Calculate this together = 733 J / 312g x 15 °C
= and then you can find your answer for c.
Explanation:
Name 3 ores for metals and which metal they yield?
how many kg of solvent would contain 130 grams of ZnBr2 if the solution was 0.950 grams
Answer:
0.00731 kg
Explanation:
Given that solution is a product of solute and solvent.
Hence, solution = solute * solvent
In this case, the solution is given as 0.950 grams = 0.00095 kilograms
solute is given as 130 grams = 0.13 kilograms
Hence to get the amount of solvent in kilograms, we have
Solution ÷ Solute => 0.00095 ÷ 0.13
= 0.0073076923
=> 0.00731 kilograms
What is the mass of an element with 3 protons and 4 neutrons? Also, how many neutrons are in the nucleus of an atom that has an atomic mass of 36 and atomic number of 25?
what phase is carbon dioxide in at 5 atm pressure and -20 C
Answer:
When a solid turns directly to a gas this is called sublimation. From the graph it can be seen if the pressure is raised to ~5 atm as the CO2 warms up, it will pass through its triple point.
Explanation:
Answer:If the pressure is raised to ~5 atm as the CO2 warms up, it will pass through its triple point.
Explanation:
How did mitochondria
become part of the cell?
Answer: The mitochondria, as bacteria, only wanted to rob the host cells of their energy and then leave them to die. But the bacteria soon realized the benefit of working together with simple cells. The simple cells provide them with antioxidants to protect them from free radicals and toxic reactive oxygen species that the mitochondria generate as a byproduct of energy production.
Hope dis helps!
:)
1. Since minerals come from non-living things, they are
A. crystals
B. solids
C. coloured
D. inorganic substances
Answer:
D. inorganic substances
Explanation:
Inorganic lacks carbon, which is usually found in living things.
What is the correct symbol equation for the reactions between propanoic acid + sodium carbonate?
Explanation:
[tex]2CH _{3}CH_{3}COOH + Na _{2}CO_{3} → 2CHCHCOONa + 2H ^{ + } + CO_{3} ^{ 2- } [/tex]
what volume is needed to make a 2.45 M solution of KCl using 0.50 mol of KCl
The molarity of a substance is simply defined as the mole of solute per unit litre of the solution. Mathematically, it is expressed as:
[tex]Molarity = \frac{mole}{volume }[/tex]
From the question given above, the following data were obtained:
Molarity of KCl = 2.45 M
Mole of KCl = 0.5 mole
Volume =?The volume of KCl needed can be obtained as follow:
[tex]Molarity = \frac{mole}{volume }\\\\2.45 = \frac{0.5}{Volume }[/tex]
Cross multiply
2.45 × Volume = 0.5
Divide both side by 2.45
[tex]Volume = \frac{0.5}{2.45}\\[/tex]
Volume = 0.20 LTherefore, 0.20 L is needed to make the solution.
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WHOEVER CAN HELP MEEEEE SAY "I" AND I WILL GIV U MANY MANY POINTS, THANKS, BRAINLIEST!!!! PLSSSSSSSSS
pls do this below:
1: Biosphere
2: Atmosphere
3: Hydrosphere
4: Atmosphere (I think?)
5: Stratosphere
6: Biosphere
7: Hydrosphere
8: Geosphere
:)
Which of the following does not describe DNA?
Answer:
D
Explanation:
can i get brainliest??