Answer:
44.09562 grams
Explanation:
PLEASE HELP!!
A scientist places a pH meter in a sample of concentrated potassium hydroxide (KOH). The scientist slowly adds nitric acid (HNO3) to the KOH and monitors the pH. Describe how the pH and hydronium ion concentration will change in the solution as the acid is added.
Answer:
pH of the solution will decrease & hydronium ion concentration will increase in the solution as the acid is added.
Explanation:
What is a hot spot?
Own words
Answer: Hotspot: A hotspot is a physical location where people can access the Internet, typically using Wi-Fi, via a wireless local area network (WLAN) with a router connected to an Internet service provider. ... While many public hotspots offer free wireless access on an open network, others require payment.
A hot spot is an area on Earth over a mantle plume or an area under the rocky outer layer of Earth, called the crust, where magma is hotter than surrounding magma. The magma plume causes melting and thinning of the rocky crust and widespread volcanic activity.
Explanation: MY own word's.
What is a hot spot? {Must be in your own words} Plz hurry
Answer:
Hot spot is like someone who has data or min on there phone turn on their phone wifi so you can use it pretty much
Answer:
a hot spot is a form of wifi that u can use anywhere at anytime. it connects to near satalites or wifi towers. it allows you to use devices r games without the need for wifi.
Explanation:
if i have a bean then how many rice do i have in bean??
Answer:
What?
Explanation:
That makes no sense at all
Select the topics that a student majoring in atmospheric science would be required to study.
mathematics
political science
physics
climatology
computer programming
physical geography
remote sensing
geographic information systems
Answer:
whats the answer//
Explanation:
Answer:
A,D,G,H
Explanation:
Mathematics
Climatology
Remote sensing
Geographic information systems
How many electrons and protons does the sodium ion have 11 protons and 11 electrons
Answer:
A sodium ion Na+ contains 10 electrons, 11 protons, and 12 neutrons.
Explanation:
Which of the following is the best hypothesis?
A. If paper is burned, the products will be carbon dioxide and water.
B. At what temperature does a piece of notebook paper start to burn?
C. Some people use burning paper to help get a campfire started.
D. You should recycle paper instead of burning it.
Answer:
THE CORRECT ANSWER IS A
sorry for caps
Explain this method (Froth floatation method)..........
Answer:
froth flotation is a technique commonly used in the mining industry. In this technique, particles of interest are physically separated from a liquid phase as a result of differences in the ability of air bubbles to selectively adhere to the surface of the particles, based upon their hydrophobicity.
Explanation:
Froth floatation method is commonly used to concentrate sulphide ore such as galena (PbS), zinc blende (ZnS) etc. (ii) In this method, the metaalic ore particles which are perferentially wetted by oil can be separated from gangue. (iii) In this method, the crushed ore is suspended in water and mixed with frothing agent such as pine oil, eucalyptus oil etc. (iv) A small quantity of sodium ethyl xanthate which act as a collector is also added. (v) A froth is generated by blowing air through this mixture. (vi) The collector molecules attach to the ore particles and make them water repellent. (vii) As a result, ore parrticles, wetted by the oil, rise to the surface along with the froth. (viii) The froth is skimmed off and dried to recover the concentration ore. (ix) The gangue particles that are preferentially wetted by water settle at the bottom.
A 20 mL sample of human urine was found to have 10 mg of
urea during analysis. The molar mass of urea is 60.1 g/mol.
Calculate the molarity of urea in the given sample.
The molecular weight for the compound from the previous question is
64.07 g/mol. What is its molecular formula?
All atoms of a given element are identical in that they have the same number of
a) protons
b) neutrons
c) electrons
Answer:
A) protons
Explanation:
Protons are what give atoms their elements. If one atom has a differing number of protons from another atom, they will never be the same element.
PLEASE HELP:
iron reacts with nitrogen to form iron(III) nitride
Answer:
[tex]2Fe +N_{2} -> 2FeN[/tex]
Explanation:
Iron is Fe, nitrogen is N. Nitrogen is diatomic, which means it occurs as a molecular pair by itself. Iron III nitride has a chemical formula of FeN because nitrogen has a charge of 3-, and iron III tells us the iron has a charge of 3+ so you just need one of each to make the charges balance and the compound neutral.
When iron reacts with nitrogen to form iron(III) nitride, the balanced chemical equation of this reaction is as follows:
2 Fe + N₂ → 2FeN
What is balanced chemical equation ?The term balanced chemical equation is defined as a chemical equation in which mass is conserved and there are equal numbers of atoms of each element on both sides of the equation.
The chemical equation must be balanced in order to obey the law of conservation of mass. When the number of different atoms of elements in the reactants side equals the number of atoms in the products side, the chemical equation is balanced.
Nitrogen is diatomic, that means it occurs as a molecular pair by itself. Iron III nitride has a chemical formula of FeN because nitrogen has a charge of 3-, and iron III tells us the iron has a charge of 3+ .
Thus, iron reacts with nitrogen to form iron(III) nitride.
To learn more about the balanced chemical equation, follow the link;
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Heat transfer that occurs within or between solid objects is called
Answer:
conduction
Explanation:
The answer is Conduction
What forms an electric current?
If a mechanical wave has a frequency of 0.147 Hz and a wavelength of 12.05 m, what is the velocity of the wave? (round to the hundredths place)
Answer:
0.147 Hz because I took the test
The velocity of a wave is the product of its frequency and wavelength. The velocity of wave with 0.147 Hz and 12.05 m is 1.77 m/s.
What is frequency ?The frequency of a wave is the number of wave cycles per unit time. Frequency is the inverse of time period of the wave. It is inversely proportional to the wavelength. Unit of frequency is Hz which is equivalent to s⁻¹.
The wavelength of a wave is the distance between two consecutive crests or troughs. The wavelength λ, and frequency ν of a wave is related to the velocity v of the wave as follows:
v = νλ
Given that,
frequency = 0.147 Hz
wavelength = 12.05 m
then, velocity = 0.147 Hz × 12.05 m = 1.77 m/s.
Therefore, the velocity of the mechanical wave is 1.77 m/s.
Find more on mechanical waves:
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What type of solution would have a pOH of 7
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Answer: None of these, because it is a neutral solution
Explanation:
I hope this helped!
<!> Brainliest is appreciated! <!>
- Zack Slocum
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Answer:
none of these
Explanation:
it should have a neutral solution
When an atom is changed into an ion, the is changed
number of protons
b. number of neutrons
number of electrons
d. mass number
Answer:
the number of electrons will end up changing
Question 1 of 10
What variable represents thermal energy in the equation Q=MAT?
O A. The variable e
O B. The variable Q
O c. The variable
O D. The variablem
formation of SO3 from SO2 and O2 is favoured by
a) increase in pressure
b) decrease in pressure
c) Increase in temperature
d)decrease in temperature
Answer:
answer is A. increase in pressure
l think this correct answer
Vinegar is a solution with a 3% mass of acetic acid. How much acid is in 550 g of vinegar?
16.5 g
10.5 g
4.5g
3 g
(show work and no links please)
*answer*
your answer will be 4.5 g
Explanation:
Vinegar is a solution with a 3% mass of acetic acid. How much acid is in 150 g of vinegar? (result: 4,5 g of acetic acid) solute acetic acid solvent water solution.
There are 16.5g of acid in 550 g of vinegar with a 3% mass.
HOW TO CALCULATE MASS:
According to this question, vinegar contains a 3% mass of acetic acid. This means that acetic acid is 3 out of 100 grams of vinegar. If there are 550g of vinegar, this means that the mass of acetic acid in the vinegar is calculated as follows:3/100 × 550= 0.03 × 550= 16.5gTherefore, there are 16.5g of acid in 550 g of vinegar with a 3% mass.Learn more at: https://brainly.com/question/15948514?referrer=searchResults
According to the text, fission occurs when the nucleus
two lighter nuclei.
Answer:
Splits into
Explanation:
Because fission reaction is divided into two or more pieces.
A chemical reaction causes the chemical compositions of substances to change.
a. True
b. False
Answer:
True
Explanation:
A chemical change is otherwise known as a chemical reaction. A chemical change is characterized by the formation of new substances, evolution of heat and change in chemical composition of substances. The change in the composition of substances during a chemical change is the result of the making and breaking of chemical bonds during a chemical change.
A chemical change is not easily reversible because it involves changes in chemical composition of substances.
An example of a chemical change is the combination of sodium hydroxide and hydrochloric acid according to the reaction equation;
HCl(aq) + NaOH (aq) -----> NaCl(aq) + H2O (l)
We easily notice the change in the chemical composition of each of the substances involved in the reaction.
Exit ticket: Name the 2 factors that Terrestrial Biomes are separated by ___________ & ________
Answer:
temperature and rainfall
Explanation:
HELP ASAP WHATS THE DEFINITION I NEED JT NKW
Answer:
1.Summer solstice 2.seasons 3. winter solstice 4. Equinox
Explanation:
I hope it helps!
Have a great day!
how many grams of hcl would be produced if 54 grams of water were used
Answer:
i dont know
Explanation:
its simple i dont know
Answer:
Explanation:Red
1. Calculate the percent composition of the elements in C4H8O2.
Answer:
%C = 54.53%
%H = 9.144%
%O = 36.32%
Explanation:
Step 1: Calculate the mass of each element in 1 mole of C₄H₈O₂
We will multiply the number of atoms by the molar mass of the element.
mC: 4 × 12.01 g = 48.04 g
mH: 8 × 1.007 g = 8.056 g
MO: 2 × 16.00 g = 32.00 g
Step 2: Calculate the mass of 1 mole of C₄H₈O₂
We will sum the previously calculated masses of the elements.
mC₄H₈O₂ = mC + mH + mO = 48.04 g + 8.056 g + 32.00 g = 88.10 g
Step 3: Calculate the percent composition of each element
We will use the following expression.
%Element = mElement / mCompound × 100%
%C = 48.04 g / 88.10 g × 100% = 54.53%
%H = 8.056 g / 88.10 g × 100% = 9.144%
%O = 32.00 g / 88.10 g × 100% = 36.32%
A sample of gas has an initial volume of 30.8L AND an initial temperature of -67 degree Celcius. What will be the temperature of the gas if the volume is 21.0L?
Answer:
–132.55 °C
Explanation:
From the question given above, the following data were obtained:
Initial volume (V₁) = 30.8 L
Initial temperature (T₁) = –67 °C
Final volume (V₂) = 21.0 L
Final temperature (T₂) =?
Next, we shall convert –67 °C to Kelvin temperature. This can be obtained as follow:
T(K) = T(°C) + 273
Initial temperature (T₁) = –67 °C
Initial temperature (T₁) = –67 °C + 273
Initial temperature (T₁) = 206 K
Next, we shall determine the final temperature of the gas. This can be obtained as follow:
Initial volume (V₁) = 30.8 L
Initial temperature (T₁) = 206 K
Final volume (V₂) = 21.0 L
Final temperature (T₂) =?
V₁/T₁ = V₂/T₂
30.8 / 206 = 21 / T₂
Cross multiply
30.8 × T₂ = 206 × 21
30.8 × T₂ = 4326
Divide both side by 30.8
T₂ = 4326 / 30.8
T₂ = 140.45 K
Finally, we shall convert 140.45 K to celsius temperature. This can be obtained as follow:
T(°C) = T(K) – 273
T₂ = 140.45 K
T₂ = 140.45 K – 273
T₂ = –132.55 °C
Thus, the new temperature of the gas is –132.55 °C
Unit 4.2 quiz chemistry
Answer:
H₂SO₄ is the correct answer sorry im late
PLEASE HELP!!!
Some single displacement reactions involve one halogen replacing a less reactive halogen.
Cl2, replaces iodine in NaI, producing I2 and NaCl. Write the balanced single displacement reaction with the simplest whole number coefficients.
Do not include the states of the reactants or products.
Answer:
[tex]Cl_2+2NaI\rightarrow I_2+2NaCl[/tex]
Explanation:
Hello there!
In this case, according to the described chemical reaction, Cl2 replaces iodine in NaI in order to produce I2 and NaCl:
[tex]Cl_2+NaI\rightarrow I_2+NaCl[/tex]
It is possible to realize how chlorine replaces iodine in agreement with the single displacement reaction. Moreover, since chlorine and iodine atoms are not correctly balanced, we add a 2 in front of both NaI and NaCl in order to do so:
[tex]Cl_2+2NaI\rightarrow I_2+2NaCl[/tex]
Best regards!
The balanced single displacement reaction should be Cl2+2Nal→I2+2NaCl.
Balance single displacement reaction:The C12 should be replaced with the iodine in Nal for generating the 12 and NaCl.
Also, the chlorine should replace the iodine in the agreement along with a single displacement reaction. Also, the chlorine and the iodine atoms should not be rightly balanced.
Therefore, The balanced single displacement reaction should be Cl2+2Nal→I2+2NaCl.
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Which of the following would be defined as an exact number?
A. bronze is 12.5% by mass tin
B. 25 ml
C. 50.00 cm
D. 1.000 liters