Answers
Answer:
Au = Element
NaCl = Compound
Salad = Heterogeneous
NaCl & Water = Homogeneous
Related Questions
Question :-
who invited vaccination?
Answers
Answer:
Edward Jenner
Explanation:
In 1796, he tested a vaccine on a boy with cowpox and he became immune to smallpox.
is an example of a
formula.
A
B
molecular
structural
Answers
Answer:
Structural formula
Explanation:
Structural formulas are usually represented as such.
See image for question
Answers
Answer:
the energy produced as part of the reaction and balancing the equation accounts for the energy produced
1. Heat and pressure deep beneath Earth's surface can change any rock into
chemical rock
gemstone
metamorphic rock
sedimentary rock
Answers
i need help again...
Answers
Which of these is an example of force?
a. Watching a slice of bread in the toaster
b. Pulling a casserole out of the oven
c. Listening to your school chorus
d. Taste testing soup cooking on the stovetop
Answers
Answer:B
Explanation:
What is the mass of 4.0 moles of sodium, Na?
– previous question: “how many atoms are present in 4.0mol of sodium?” = 2.4 x 10^24 atoms of Na in 4.0 moles.
need an explanation of how to figure this out (& info on how to do this in other problems as well, thank you) <3
Answers
Answer:
91.60 grams
Explanation:
For this specific problem, you are asked to find the weight of an element, when given moles. Other problems could give you a compound. In each case, you need to find the molar mass of the element or compound, that is, the weight (in grams) of 1 mole of the element or compound. Now that you know the molar mass of the element/compound, you can multiply by the amount of moles the equation the equation gives you to find the total weight.
In this problem, you are asked to find the mass of Sodium (Na). First, we need to look on the Periodic Table to find the Atomic Mass of Sodium. If we look, we find this to be 22.990 amu. Side note - when we find molar mass, amu and grams are interchangeable - you'll see here. This 22.990 amu is also the molar mass in GRAMS of 1 mole of sodium. The equation asks us to find the mass of 4 moles of sodium, so now we simply multiply by 4. 22.990 * 4 = 91.60 grams.
In summary, find the molar mass (1 mole) of the substance, by adding the amu's of each element (keeping mind the amount of each). Then, multiply this total number by the amount of moles that is given, and put your answer in moles.
Hope this helps
Which physical property is most helpful for separating a mixture of salt dissolved in water?
A Particle density
B Boiling point
C Rate of solution
D Magnetic attraction
Answers
Answer:
B. Boiling Point
Explanation:
To separate salt from water, you need to boil it until all the water evaporates, and you will be left with salt.
Answer:
The answer is Boiling point
Explanation:
I got it right on my exam
Determine the wavelength, in meters, of a wave that has a frequency of 1.25 x 1020 Hz.
And what type of wave/ray is it?
Answers
Answer:
Frequency of wave is given 1.25 × 10²⁰ Hz
We have been asked to determine the wavelength of that wave ( in metres) .
We Know the speed of light in air/vacuum is
c = 3 × 10⁸ m/s
❍[tex]\\{\underline{\boxed{\green{\bf{f = \dfrac{c}{ \lambda} }}}}}[/tex]
Put the value we obtain
[tex]\sf \implies \: 1.25 \times {10}^{20} = \dfrac{3 \times {10}^{8} }{ \lambda} \\ \\ \sf \implies \lambda \: = \dfrac{3 \times {10}^{8} }{1.25 \times {10}^{20} } \\ \\ \sf \implies \lambda = \dfrac{3}{1.25 \times {10}^{12} } \\ \\ \sf\implies \lambda = 2.4 \times {10}^{ - 12} m [/tex]
So, the wavelength of the wave is 2.4 × 10⁻¹² m
It would be Gamma Ray .
When the brakes are applied in a moving car, the car's kinetic energy
O A. transforms back into chemical potential energy.
O B. transforms into heat due to friction in the brake pads and with the road.
O c. remains the same, but the car's potential energy increases.
OD. increases until the car comes to a stop.
Answers
Answer:B
Explanation:There you go
The horses on a carousel or merry-go-round are accelerating because
Answers
Using the line spectra below and information from the previous activity, determine which subatomic particles play the biggest role in determining the color of an atom
Sample 1 (Li-1-10):
Sample 2 (C-13):
Sample 3 (C+2-18):
Sample 4 (C-1-13):
Sample 5 (Ne-2-18):
Sample 6 (Ne+3-17):
Answer to activity question:
Justification:
Answers
Answer:
1(li_2_10)
li_1-10.
1_10:9
how to convert washing soda into sodium silicate
Answers
Answer:
Hope it helps!~ (sorry if you get it wrong or I got it wrong-)
Explanation:
Solutions of sodium silicates can be produced by treating a mixture of silica (usually as quartz sand), caustic soda, and water, with hot steam in a reactor.
~The Confuzzeled homan
What is the difference between endothermic and exothermic changes?
Which type of change (exothermic or endothermic) is water freezing? Why? What type of matter is made of really hot and super excited (fast-moving) charged particles?
Answers
Answer:
An exothermic process releases heat, causing the temperature of the immediate surroundings to rise. An endothermic process absorbs heat and cools the surroundings. The frezing of water is an exothermic process because heat is being removed from the system. In gases the particles move rapidly in all directions, frequently colliding with each other and the side of the container. With an increase in temperature, the particles gain kinetic energy and move faster. Hope this helped! :)
!Please answer! Sort the chemical reactions based on whether they absorb or release energy
respiration in cells
producing electric current
photosynthesis
burning a candle
baking bread
activating a cold pack
Answers
Producing electric current, burning a candle, baking bread- release energy.
Answer:
Releases Energy; burning a candle, producing electric current, and respiration in cells.
Absorbs Energy; activating a cold pack, baking bread, and photosynthesis.
Explanation:
Burning a candle releases heat energy into the surrounding area. The respiration process in cells does not produce any energy, so it must release it. Activating a cold pack absorbs energy in order to activate. Baking bread absorbs heat when baking, it releases it when cooling. Photosynthesis absorbs energy at the beginning of the process before releasing/using it.
This is 100% Correct, I checked this by taking the test and attached the image.
Laboratory equipment is cleaned and properly stored after use primarily so that -- chemical products can be measured and recorded as data chemical products can be measured and recorded as data time is saved in setting up the next experiment time is saved in setting up the next experiment toxic materials can be kept in the laboratory toxic materials can be kept in the laboratory the possibility of contamination in the laboratory is minimized
Answers
Answer:
the possibility of contamination in the laboratory is minimized
Explanation:
When a particular laboratory equipment is used for a given purpose, it can not be used four another purpose until it has been thoroughly washed. This is done in order to avoid contamination when the equipment is subsequently used for a different purpose.
Hence, if a laboratory equipment is not properly cleaned and stored after use, they remain contaminated and give inaccurate results when subsequently used.
PLEASEE HELPPP MEEEEE
Calculate the mass of 3.7 L of CH4 at STP.
Answers
Answer:
Explanation:
Molar mass CH4 = 16g/molAt STP , 16g CH4 has volume = 22.4LMass of 3.136 L CH4 = 3.136L/22.4L * 16g = 2.24g
According to the standard temperature and pressure conditions and ideal gas equation, the mass of 3.7 L of CH₄ is 0.026 g.
What are standard temperature and pressure conditions?Standard temperature and pressure are defined as a standard set of conditions required for experimental measurements which are established to allow comparison between different sets of data.
Standards which are commonly used are those International Union of pure and applied chemistry and national institute of standards and technology.These are not universally accepted standards but are the ones which are commonly used.
Standard conditions of pressure and temperature are necessary to define standard reference conditions used to express volumes of liquids and gases.These values are important to physicists, chemists ,engineers ,pilots and navigators.
According to ideal gas equation mass= PV×molar mass/RT on substitution mass= 1×3.7×16/8.314×273=0.026 g.
Learn more about standard temperature and pressure,here:
https://brainly.com/question/29129606
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Which deduction about the element astatine can be made from its position in group 7
Answers
It forms covalent compounds with sodium.
what section do the nonmetals fill in the quantum mechanical model of the atom?
Answers
Answer:
Section P
Explanation:
What is the volume of 4.35 moles of a gas at a pressure of 85.6 kPa and 26.0°C?
Answers
Answer:
125,066 litres
Explanation:
Which environmental impact is associated with the use of nuclear power plants?.
Answers
Answer:
A major environmental concern related to nuclear power is the creation of radioactive wastes such as uranium mill tailings, spent (used) reactor fuel, and other radioactive wastes. These materials can remain radioactive and dangerous to human health for thousands of years.
3. A reaction produces 14.2 grams of a product. The theoretical yield of that product
is 17.1 grams. Which of the statements are true? Select 2 that apply. (1 mark)
A. The percent yield of the product is 14.2%.
B. The percent yield of the product is 17.1%.
C. The percent yield of the product is 83.0%.
D. The percent yield of the product is 120.0%.
E. The actual yield of the product is 14.2 grams.
F. The actual yield of the product is 17.1 grams.
Answers
A reaction that produces 14.2 grams of a product and the theoretical yield of that product is 17.1 grams is true for the following statements :
The percent yield of the product is 83.0%
The actual yield of the product is 14.2 grams.
Percentage Yield:Percent yield is the percent ratio of actual yield to the theoretical yield.
Mathematically,
percent yield = actual yield / theoretical yield x 100%
actual yield = 14.2 grams
theoretical yield = 17.1 grams
percentage yield = 14.2 / 17.1 × 100%
percentage yield = 83.0409356725 %
percentage yield = 83.0 %
Therefore,
The percent yield of the product is 83.0%
The actual yield of the product is 14.2 grams.
learn more on percentage yield here; https://brainly.com/question/4180677
For long-term storage of microbes that will be may be revived and grown later, what temperatures are best?
above 70 °C
between -2 and 4 °C
between -10 to -20 °C
below -70 °C
Answers
What’s the answer?????
Answers
potential energy
kinetic energy
kinetic energy
idk last sorry =(
Why is the boiling point of 2 M NaCl solution higher than the boiling point of 1 M of NaCI solution?
Answers
Answer:
The fist option is correct
Explanation:
2 molecules of water have relatively large intermolecular force than a single molecule
5 x 10^4 ÷ 2.5 x 10^2 =
a
2 x 10^2
b
12.5 x 10^2
c
.5 x 10^6
d
5 x 10^6
Answers
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[tex] \frac{5 \times {10}^{4} }{2.5 \times {10}^{2} } = 2 \times {10}^{2} \\ [/tex]
So the correct answer is (( a )) .
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The answer is 2.5 x 10^2
10. What illnesses or other damage to humans can be caused by UV light?
Answers
how does a lone pair contribute to molecular shape
Answers
Answer:
It takes up space like an "invisible" atom.
Explanation:
It's just right dawg.
Plz help! I don't want internet answers plz :D
1. What determines weight?
2. What does Homogeneous mean?
Answers
Answer:
Explanation:
number 2 = A mixture that cannot be easily distinguished between the different parts. Distillation is one of the only ways to remove the parts from each other. For example, in a fruit salad you can easily pick things out, but in jello you cannot take the sugar out.
please give me brainilest
number 1. = The density of the bone structure and weight are essentially determined in order to determine the person's bone structure. The bone density measurement involves the size of the wrist. Determining the body frame allows an individual to estimate the best weight.
Which reaction displays an example of an arrhenius base? naoh(s) right arrow. na (aq) oh–(aq) hcl(g) h2o(l) right arrow. h3o (aq) cl–(aq) ch3cooh(aq) h2o(l) right arrow. h3o (aq) ch3coo–(aq) nh3(aq) hc2h3o2(aq) right arrow. nh4 (aq) c2h3o2–(aq)
Answers
The reaction which displays an example of an arrhenius base is
NaOH(s) → Na⁺(aq) + OH⁻(aq).
What is Arrhenius base?According to the Arrhenius theory, those substance which gives H⁺ ion to the aqueous solution is acid and which gives OH⁻ ion to the aqueous solution is known as base.
All given chemical reactions will display an arrhenius acid, but only one reaction display as a arrhenius base as they gives OH⁻ ion to the aqueous solution and that reaction will be:
NaOH(s) → Na⁺(aq) + OH⁻(aq)
Hence option (1) is correct.
To know more about arrhenius base, visit the below link:
https://brainly.com/question/1321386
Answer:
A: NaOH(s) ---> Na+(aq) + OH–(aq)
Explanation: