How many grams of NaOH would be required to make 1.0 L of a 1.5 M solution
The sound of a trumpet ECHOES off a nearby mountain. This is which type of wave interaction?
Answer:
reflection
Explanation:
wave reflection is when a sound bounces off something it cannot go through, like echoing
what is nucular decay
Answer:
Nuclear decay is also called radioactive decay, and it occurs in a series of sequential reactions until a stable nucleus is reached. Nuclear reactions release much more energy—orders of magnitude more—than exothermic chemical reactions.
Explanation:
substances that are made of particles and that move in a random motion I need this nowww!!!!
Answer:
ANY KENITIC PARTICLE
Particles in both liquids and gases collectively called fluids
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What is the pH of 0.12M HNO3
Answer:
pH= 0.92
Explanation:
HNO3-> H^+ +NO3^-
HNO3 is a strong acid, so it fully dissociates
[HNO3] = 0.12M [H^+] = 0.12M
pH= -log[H^+]
pH=-log[.12] = 0.92
pH = 0.92
(15 POINTS) arrange the conversion factors in order as displayed in the pic
Answer:
3,1,2
Explanation:
3 bc u go get liters
1 because ur going from C3H8 to CO2
2 because ur getting CO2 liters
2- How many electrons make an energy level stable (happy) ?
HELP PLEASE I NEED THE BEST RESPONSE.....
Answer:
You need 8 electrons to make a stable energy level. If you have any less, it won't make it "happy" per say, and with more it will make it happier but its probably safer to use the 8!
Explanation:
Hope this helps! Plz mark brainliest!
Which is the best example of plant tissue?
A:
B:
C:
D:
(Please look at the pictures to answer if its wrong I may have a chance to fail please be nice and help)
Explanation:
all are a good example of plant tissue but from my side I think it is B.
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7
Jacob has a bucket of ice. He covers the bucket with a lid and sets it in the sun. The ice melts into liquid water. How does the mass
of the ice compare with the mass of the water?
OA
The mass of the ice is less than the mass of the water
ОВ.
The mass of the ice is more than the mass of the water
OC.
The mass of the ice is the same as the mass of the water.
OD
There is no way to determine this from the information given.
Answer: (C) the same
Here's what I'm thinkin: Since the bucket has a lid, then no water was evaporated thus the mass wouldn't decrease. Also, Jacob didn't add any substances to the bucket of ice, so the mass wouldn't increase. You know? Sorry if this is wrong, but that's how I figured the answer.
Explanation:
Trust Milky. Milky smart.
Na2CO3 + 2HCl ---------> 2NaCl + CO2 + H2O How many moles of NaCl are produced from the reaction of 1.67 x 1022 molecules of Na2CO3 with excess HCl?
Answer:
0.0554 moles of NaCl are produced from the reaction of 1.67*10²² molecules of Na₂CO₃ with excess HCl.
Explanation:
The balanced reaction is:
Na₂CO₃ + 2 HCl → 2 NaCl + CO₂ + H₂O
By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of each compound participate in the reaction:
Na₂CO₃: 1 mole HCl: 2 moles NaCl: 2 moles CO₂: 1 mole H₂O: 1 moleOn the other hand, Avogadro's Number is called the number of particles that make up a substance (usually atoms or molecules) and that can be found in the amount of one mole of said substance. Its value is 6.023*10²³ particles per mole. Avogadro's number applies to any substance.
In this case, you can apply the following rule of three: if 6.023*10²³ molecules of Na₂CO₃ are contained in 1 mole, 1.67*10²² molecules will be contained in how many moles?
[tex]amount of moles=\frac{1.67*10^{22}molecules*1mole }{6.023*10^{23}molecules}[/tex]
amount of moles= 0.0277 moles
In this case, you can apply the following rule of three: if by stoichiometry 1 mole of Na₂CO₃ produces 2 moles of NaCl, 0.0277 moles of Na₂CO₃ will produce how many moles of NaCl?
[tex]amount of moles of NaCl=\frac{0.0277 moles of Na_{2} CO_{3}*2 moles of NaCl }{1 mole of Na_{2} CO_{3}}[/tex]
amount of moles of NaCl= 0.0554 moles
0.0554 moles of NaCl are produced from the reaction of 1.67*10²² molecules of Na₂CO₃ with excess HCl.
What is the specific heat capacity of a 70 g sample of an unknown metal that releases 6700J of heat when it cools from 90 to 25 degrees C?
1.47 J/g°C is the specific heat capacity of a 70 g sample of an unknown metal that releases 6700J of heat when it cools from 90 to 25 degrees C.
What is specific heat capacity?The specific heat capacity is defined as the quantity of heat (J) absorbed per unit mass (kg) of the material when its temperature increases by 1 K (or 1 °C), and its units are J/(kg K) or J/(kg °C).
q = mCpΔT
Solve for Cp —> Cp = q/mΔT
q = -6700 J (negative because it released heat)
m = 70 g
ΔT = Final temp - initial temp = 25 - 90 = -65°C
Cp = (-6700 J) ÷ (70 g)(-65°C)
= 1.47 J/g°C
Hence, 1.47 J/g°C is the specific heat capacity of a 70 g sample of an unknown metal that releases 6700J of heat when it cools from 90 to 25 degrees C.
Learn more about specific heat capacity here:
https://brainly.com/question/16952828
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What is the name of the compound NO₄?
Answer:
hello
Explanation:
answer is oxido nitrate please follow me
An electromagnet is different from an iron magnet because
A It will require a battery pack to charge it
B. it can also be plugged in to run a toaster
C. it is created by an electric current
D. it is always painted blue
PLEASE HELP THIS IS FOR A SERIOUS TEST
Answer:
Explanation:
B
what are the affects of increasing thermal energy B
Answer:
The molecules tend to speed up and move faster throughout the substance once thermal energy increases. This is evident whenever we heat up water as its molecules tend to move faster throughout the water as thermal energy tends to increase
Hope this helps!
If I have 38g of MgCl2, how many moles do I have?
Answer:
0.3991
Explanation:
no. of moles = mass/molar mass.so lets get the molar mass of MgCl2
(Mg=24.305 and Cl=35.453) so the molar mass of MgCl2= 24.305+(2*35.453)
molar mass of MgCl2= 95.211
now lets get the no of moles:no of moles=38g/95.211=0.3991
A researcher notices that atoms of an element x are releasing energy. Why does this happen?
Answer:
The atoms are affected by light.Please give me Brainliest it would mean a lot
What is the correct answer based on sig figs for the following 4.2787 x 2.27= 9.712649
A. 9.712649
B. 9.7126
C. 9.7
D. 9.71
Answer:
a that all you need and why you just and use a calculators and what they are for
How many moles of sodium hydroxide would have to be added to 250 mL of a 0.303 M hydrofluoric acid solution, in order to prepare a buffer with a pH of 3.630?
Answer:
0.0562 moles
Explanation:
Based on the H-H equation, for the HF buffer:
pH = pKa + log [F⁻] / [HF]
Where pH is the pH of the buffer = 3.630
pKa is pKa of HF buffer: 3.17
And [] could be taken as the moles of each reactant
3.630 = 3.17 + log [F⁻] / [HF]
0.46 = log [F⁻] / [HF]
2.884 = [F⁻] / [HF] (1)
The initial moles of HF are:
0.250L * (0.303mol / L) = 0.07575 moles
The HF reacts with NaOH as follows:
HF + NaOH → NaF + H₂O
That means the moles of HF will be the initial moles of HF - Moles NaOH
And moles NaF = F⁻ = Moles of NaOH added
That means:
0.07575 moles = [F⁻] +[HF] (2)
Replacing (2) in (1):
2.884 = [F⁻] / 0.07575 moles - [F⁻]
0.218 - 2.884[F⁻] = [F⁻]
0.218 = 3.884[F⁻]
[F⁻] = 0.0562 moles
That means the moles of NaOH that must be added are:
0.0562 moleswhat would be necessary to change a liquid to a gas
Answer:
latent heat, also called the heat of vaporization, is the amount of energy necessary to change a liquid to a vapour at constant temperature and pressure.
Explanation:
the difference between GDP and GNP
A child drops a ball from a bridge. The ball strikes the water under the bridge 2.0s later. What is the velocity of the ball when it hits the water
Answer:
20m/s
Explanation:
Given that :
Time, t = 2 seconds
Using the relation :
v = u + at
a = g is positive (downward)
V = final velocity
u = initial velocity = 0
v = u + gt
v = 0 + 10(2)
v = 20 m/s
How are the atoms of carbon different from the atoms of nitrogen
Per my research, it was said that each of the atoms of the carbon has over 6 protons, six neutrons, and 6 protons. Each atom of nitrogen has 7 protons, 7 electrons, and 7 neutrons. The atomic mass of carbon and nitrogen is 12 and 14 respectively. As the number of electrons in the atoms of the two elements is different they have different chemical properties.
Explanation:As you may know, I did my research and this is what it gave me. I would suppose it is correct since it explains that the carob has over 6 protons and so on. Correct me if I am incorrect and I hope this helped. Have a good one!
(っ＾▿＾)۶٩(˘◡˘ )What is the difference between hurricanes,typhoons,and tropical cyclones?
the one main difference between a hurricane and a typhoon is the specific location where the storm takes place!!
typhoons and hurricanes can reach sustained winds of an averaging 74 mph.
YOU ARE AMAZING AND YOU ARE SO IMPORTANT HAVE A GOOD DAY!
Answer:
Thx Have a fantastic day! :)
Explanation:
6. What type of energy is the result of water and hot matter interacting?
Boiling water on a stove is an example of thermal energy. Thermal energy is produced when the atoms and molecules in a substance vibrate faster due to a rise in temperature.
Describe the effect of cooling a gas in a container?
Answer:
By cooling the gas in the container the partial pressure of the gas will cause the gas to condense. Imagine water vapor in a bottle if you cool it down it will condense into droplets as the molecules of gas start to slow down to to lower temp
Explanation:
What is the frequency when the Energy is equal to 4.18 x 10-22 ?|
Answer:
6.31x10¹¹s⁻¹ = Frequency
Explanation:
To convert frequency to energy or vice versa we must use the equation:
e = h*f
Where e is energy in joules (4.18x10⁻²²J)
h is Planck's constant (6.626x10⁻³⁴Js)
Replacing:
4.18x10⁻²²J = 6.626x10⁻³⁴Js*f
6.31x10¹¹s⁻¹ = FrequencyHELP ASAP
0.0000000000012 s=[?]ps
Answer:
No, Micah is not correct. Since there are equal numbers of people in each group who drive and who do not drive, the relative frequency for each is 50%. Because the relative frequencies are the same, there is no association between the variables.
Explanation:
Answer:1.2 picoseconds
Explanation:
Two Places were freshwater is found on earth
Answer:
Explanation:
Over 68 percent of the fresh water on Earth is found in icecaps and glaciers, and just over 30 percent is found in ground water. Only about 0.3 percent of our fresh water is found in the surface water of lakes, rivers, and swamps. Of all the water on Earth, more than 99 percent of Earth's water is unusable by humans and many other living things!
Can somebody help please
Answer:
98 moles of H₂O.
Explanation:
We'll begin by writing the balanced equation for the reaction. This is illustrated below:
2HCl + CaCO₃ —> CaCl₂ + H₂O + CO₂
From the balanced equation above,
1 mole of CaCO₃ reacted to produce 1 mole of H₂O.
Finally, we shall determine the number of mole of H₂O produced by the reaction of 98 moles of CaCO₃. This can be obtained as follow:
From the balanced equation above,
1 mole of CaCO₃ reacted to produce 1 mole of H₂O.
Therefore, 98 moles of CaCO₃ will also react to produce 98 moles of H₂O.
Thus, 98 moles of H₂O were obtained from the reaction.