In times of hot, dry, weather, some cities ban the use of garden sprinklers. Why is there such a rule
Answer:
These weather conditions are consistent with droughts, often characterized by hot, dry, weather. When this is the case, it is important to conserve water and use it only for necessities. Garden sprinklers are not essential, so their use can be sacrificed in order to provide more crucial services, such as drinking water. This rule has been put in place in order to avoid water shortages and energy crises, events that would be even more damaging during an emergency.
Determine the structure for a compound Z with formula C10H803.
i think it's a simple covalent structure
I need HELP ASAP PLEASE!!!!!
Answer:
All answers given in the photo
17.42 mL of 0.1M NaOH was needed to reach the endpoint in the titration. How many moles of NaOH are in 17.42 mL of 0.1M NaOH
Answer:
0.001742moles
Explanation:
1000ml of NaOH contain 0.1moles
17.42ml of NaOH contain (0.1*17.42)/1000 moles
= 0.001742moles
An electrolysis reaction is
A) spontaneous
B) exothermic
C) non-spontaneous
D) hydrophobic
Answer:
it's non-spontaneous
Explanation:
I hope it helps you
How many moles in 44.7 kg of carbon dioxide
Answer:
What is the number of moles of carbon present in 44 grams of carbon dioxide? One. 44 grams is a mole of carbon dioxide and there is one carbon atom in CO 2 so there is one mole of carbon. That’s how chemistry works.
Explanation:
What is the number of moles of carbon present in 44 grams of carbon dioxide? One. 44 grams is a mole of carbon dioxide and there is one carbon atom in CO 2 so there is one mole of carbon. That’s how chemistry works.
By titration, it is found that 73.3 mL of 0.175 M NaOH(aq) is needed to neutralize 25.0 mL of HCl(aq). Calculate the concentration of the HCl solution.
Answer:
0.5131M
Explanation:
NaOH(aq) + HCl(aq) — NaCl(aq) + H20(l)
Mole ratio of acid to base 1:1
(Ca × Va)/ (Cb × Vb) = Na/Nb
(0.175 × 73.3)/ (Cb × 25)= 1/1
12.8275= 25 × Cb
Cb= 12.8275/25
= 0.5131M
1.
Light is a(n) _______wave.
Group of answer choices
A. longitudinal
B. large
C. ocean
D. transverse
Answer: D. transverse
Explanation:
Light is a transverse wave, while sound is a longitudinal wave.
Which bond is the most polar?
Answer:
A
Explanation:
reason:
H-F is most polar
because bond is polarized negative towards F which is the more electronegative atom.
How do many types of cells, like bacteria, reproduce?
Answer:
cells like bacteria are bisexual so they split and their offspring is 100 percent like the parent and this process happens over and over
Explanation:
Consider a box divided in half. One side is filled with 1 mol Ne at 300. Kelvin, and the other is filled with 1 mol Rn at 300. Kelvin. A small hole is opened in the divider between the sides, allowing the gases to mix. Suppose it takes 4.0 minutes for the Rn pressure to equilibrate between the two sides. How long (min) will it take the Ne pressure to equilibrate? Enter your answer to 1 decimal place.
It will take the Ne gas approximately 1.2 s to equilibrate between the two sides.
We know that the time taken for a gas to diffuse is dependent on the molar mass of the gas. This is one of the interpretations of Graham's law of diffusion in gases. Thus, Let;
t1 = time taken for Rn to equilibrate = 4.0 s
t2 = time taken for Ne to equilibrate = ?
M1 = molar mass of Rn = 222g/mol
M2 = molar mass of Ne = 20 g/mol
Using
t1/t2 = √M1/M2
4/t2 = √222/20
4/t2 = 3.33
t2 = 4/3.33
t2 = 1.2 seconds
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PLZ HELP ASAP! I need this done tonight please
The importance of wearing a seatbelt while riding in the car can best be explained using:
A) Newton's First Law (Law of Inertia)
B) Newton's Second Law (F=ma)
C) Newton's Third Law (Action-Reaction)
D none of the above
Explanation:
this is a chemistry question ???
anyway, it is clearly A, as seatbelts try to counteract the inertia a moving body (our bodies riding in a car) has, when the environment (the car) of this body is suddenly coming to a stop.
this inertia would otherwise try to move the body still forward resulting in a headfirst crash into and often through the windshield. which causes much more damage to the body than the bruises caused by the pressure of the seatbelts against the body counteracting the body's inertia.
but also clearly, all 3 laws play a role.
the force with which the moving body has to deal when smashing into the windshield and potentially then other objects outside the car is described by the second law.
and for any action (crash) there are corresponding reactions (like the conversion of the crash energy into some absorbing reaction : damaged soft and hard tissue in the human body, crumbled car bodies,...).
Who did the ram caught in the thicket (Genesis 22:13) represent?
Answer:
“Rams Caught in a Thicket” as an allusion to the biblical story of Abraham. They more likely represent goats, which could often be seen standing on their hind legs, to reach leaves in the trees, as seen here.
Tyra designed an experiment to demonstrate an annular solar eclipse. The steps of the
experiment are listed below.
.
e
.
Place a light bulb on a stand.
Stick a pencil into a small styrofoam ball.
Switch on the light bulb and darken the room.
Stand facing the light bulb.
Hold the pencil with styrofoam ball very close to the eye.
Observe the light bulb without moving the eye and styrofoam ball.
Tyra's experiment has a flaw. Which of these statements best describes a method to
correct the flaw in Tyra's experiment? (3 points)
.
.
Place the light bulb behind the observer.
O Clamp the styrofoam ball behind the light bulb.
O Move eye towards the right to observe the light bulb.
Hold the styrofoam ball at arm's length from the eye.
Answer:
The answer is D.
Explanation:
Hold the styrofoam ball at arm's length from the eye.
No matter what container it is in, a liquid usually:
A.has the same volume
B.has a different volume
C.has the same shape
D.has a different color
Answer:
A
Explanation:
A liquid will will have the same color, it will not have the same shape and its volume will always be constant because you are not creating mass.
Hope this helps!
Explain what is meant by the term 'conservation of mass'.
Give your answer in terms of the atoms that take part in a chemical reaction
Answer:
Below
Explanation:
In a chemical reaction, per the law of conservation of mass, no atoms or subatomic particles will be created or destroyed; for example, H2O2 will decompose into H2 and O2, meaning no matter was created or destroyed.
When Zinc-67 is bombarded with a neutron, a gamma ray is emitted. What radioactive isotope is produced?
Answer:16/29
Explanation:
what will happen to a person who doesn't recognize authors and even citing proper sources?
it will be called verbatim plagiarism, also called direct plagiarism
Calculate the molar mass of magnesium chloride, CaCl 2.
Ca = 40.1g, Cl = 35.5g
Answer:
Ca = 40.1 g
Cl = 35.5
So CaCl240.1 + 35.5×2
40.1 + 71
111.1 g
Heart, 5 stars, Brainiest, and 40 coins if right! Answer needed ASAP
Which statement describes what happens when Bret runs up a flight of stairs?
A. His kinetic energy is destroyed.
B. His potential energy decreases.
C. His kinetic energy is converted into potential energy.
D. His potential energy is converted into kinetic energy.
Answer:
His kinetic energy is converted into potential energy.
Explanation:
Which species has 54 electrons
Answer: Neutral Xe atom
PLEASE PLEASE HELP! CHEM!
Answer:
0.963158 maybe just put 0.96
Explanation:
732mmhg to atm is 0.963158 i looket it up sorry if I am wrong
You have 58 g of calcium chloride (CaCl2) and you need to make a 5 M solution. You know that the molecular weight of Ca is 40 and that the molecular weight of Cl is 35.5. How many liters (L) of water would you need
Answer:
0.1045 L (4 s.f.)
Explanation:
The molecular weight, [tex]M_{r}[/tex], of calcium chloride is
[tex]M_{r}(\mathrm{CaCl_{2}}) \ = \ A_{r}(\mathrm{Ca}) \ + \ 2 \times A_{r}(\mathrm{Cl}) \ = \ (40 \ + \ 2 \times 35.5) \ \mathrm{g \ mol^{-1}} \ = \ 111 \ \mathrm{g \ mol^{-1}}[/tex], where [tex]A_{r}[/tex] is the atomic weight of the respective elements.
To calculate the number of moles (n) of calcium chloride present in 58g,
[tex]n_{\mathrm{CaCl_{2}}} \ = \ mass \ \div \ molecular \ weight \ (M_{r}) \\ \\ \-\hspace{1.13cm} = \ 58g \ \div \ 111 \ \mathrm{g \ mol^{-1}} \\ \\ \-\hspace{1.13cm} = \ 0.5225 \ \mathrm{mol \ of \ CaCl_{2}}[/tex]
Since molarity, M, is defined as the number of moles (n) of the solute per liters of a solution (L), hence to get the volume (V) required to make up a 5 molar solution is
[tex]n \ = \ M \times V \\ \\ V \-\hspace{0.05cm} = \ \displaystyle\frac{n}{M} \\ \\ V \-\hspace{0.05cm} = \displaystyle \frac{0.5225 \ \mathrm{mol}}{5 \ \mathrm{mol \ L^{-1}}} \\ \\ V \-\hspace{0.05cm} = \ 0.1045 \ \mathrm{L}[/tex]
How many valence electrons does the following isotope have?
Answer:
I have solution to your question
Nitrogen is 7th element in periodic table. It contains 7 electrons in which are 2 are inner electrons and 5 are outer electrons. Here N is in -3 oxidation state. Thus, it is having 8 valence electrons.
What is an isotopes?Isotopes of are atoms with same atomic number and different mass numbers. Almost every elements have isotopes but some of them are unstable in nature.
Atoms forms ions when they lose or gain electrons. Wen they lose electrons, they form positive ions called cations. When they gain electrons they form negative ions or anions.
Nitrogen is 7th element in periodic table. It has 7 electrons out which 2 are inner electrons and 5 are valence electrons. N needs 3 more electrons to attain octet. Thus it gains 3 electrons and forms its 3 - oxidation state.
Thus N in -3 oxidation state have 8 valence electrons.
To find more on nitrogen, refer here:
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-- --- .-. ... . / -.-. --- -.. . / .. ... -. .----. - / - .... .- - / ..-. ..- -. / .- -. -.. / .. .----. -- / ..- ... .. -. --. / .- / - .-. .- -. ... .-.. .- - --- .-. / - --- --- / ... --- what did I say in Morse code?
Answer:
MORSE CODE ISN'T THAT FUN AND I'M USING A TRANSLATOR TOO SO
Explanation:
That is what is says in morse code.
Answer:
MORSE CODE ISN'T THAT FUN AND I'M USING A TRANSLATOR TOO SO
Explanation:
Q5. A 1.35 m solution of NaCl in water is prepared. What is the mole fraction of
the NaOCI? 0.0237
Answer:
A solution contains 0.100 mol of NaCl dissolved in 8.60 mol of water.
Heart, 5 stars, and Brainiest to first right answer!
Which two types of air masses would likely form a subtropical jet stream?
Warm and cool air masses meeting near the North Pole
Cool and warm air masses meeting near the equator
Multiple warm air masses meeting near the equator
Two or more cool air masses meeting near the South Pole
Answer:
Give person above me brainliest
Explanation:
The diagram shows two different methods for collecting the product of a reaction. Which setup would be better for collecting a soluble gas such as ammonia?
Answer:
The setup above is used to collect hydrogen gas
Both filtration and distillation are useful ,methods to purify or separate components of a mixture. To collect soluble gas such as ammonia the best method is distillation. Thus setup 2 is better for collection of solute.
What is distillation?Distillation is the process of separation of compounds using heat and condenser. The mixture is first boiled to the boiling point of solvent. When it is heated the solvent such as water passes from the beaker on which the mixture is taken.
The steam of the solvent is then cooled in the condenser tube and then liquid is collected to a second beaker. Therefore, the solute remains in the first beaker and can be collected.
Using filtration, we can only separate solution with insoluble solutes. Using filter paper the solid from the solution can be separated out.
First set up shows the filtration method which is not applicable for collecting soluble gas like ammonia. Therefore, the second setup that is distillation is better to collect soluble gases.
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soaps do not work well in hard waters. But they can still be effected it large quantities of soap are added to water. Explain why.
The diagram below shows the reaction between iron oxide and carbon that produces iron and carbon dioxide. The reaction takes place in a closed system. What is true about the carbon atoms in the reaction? A. The mass of carbon atoms in the reactants is the same as the mass of carbon atoms in the products. B. The total mass of the carbon atoms is the same as the total mass of the iron atoms. C. The mass of the carbon atoms increases between the reactants and the products of the reaction. D. The total mass of the carbon atoms is the same as the total mass of the oxygen atoms.
Answer:
A
Explanation:
The trick here is to know what the conservation of mass means.
It means that no matter what happens and how much change there is, the mass of the carbons on the reactants = the mass of the carbons on the products.
That's exactly what A says.