Answer:
Covalent
Explanation:
Covalent Bonds. Another type of strong chemical bond between two or more atoms is a covalent bond. These bonds form when an electron is shared between two elements and are the strongest and most common form of chemical bond in living organisms.
is an example of a
formula.
A
B
molecular
structural
Answer:
Structural formula
Explanation:
Structural formulas are usually represented as such.
What is the volume of 4.35 moles of a gas at a pressure of 85.6 kPa and 26.0°C?
Answer:
125,066 litres
Explanation:
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
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
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.
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
!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
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.
The horses on a carousel or merry-go-round are accelerating because
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
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
1. Heat and pressure deep beneath Earth's surface can change any rock into
chemical rock
gemstone
metamorphic rock
sedimentary rock
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)
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:
i need help again...
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?
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 .
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:
Answer:
1(li_2_10)
li_1-10.
1_10:9
Question :-
who invited vaccination?
Answer:
Edward Jenner
Explanation:
In 1796, he tested a vaccine on a boy with cowpox and he became immune to smallpox.
How can knowing that something is
“matter" help you to identify a substance?
Answer:
knowing that something is a matter help you identify whether a substance is either solid, liquid or gas
Explanation:
knowing that a certain substance falls under the three groups is important. solid has a fixed volume, shape and mass, but cannot be compressed and cannot flow, liquid has a fixed volume but no fixed shape, cannot be compressed but can glow, gas has no fixed shape, no fixed volume, can be compressed and can flow
Which environmental impact is associated with the use of nuclear power plants?.
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.
Which deduction about the element astatine can be made from its position in group 7
It forms covalent compounds with sodium.
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
♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️
[tex] \frac{5 \times {10}^{4} }{2.5 \times {10}^{2} } = 2 \times {10}^{2} \\ [/tex]
So the correct answer is (( a )) .
♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️
See image for question
Answer:
the energy produced as part of the reaction and balancing the equation accounts for the energy produced
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
PLEASEE HELPPP MEEEEE
Calculate the mass of 3.7 L of CH4 at STP.
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:
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#SPJ7
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?
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! :)
What’s the answer?????
potential energy
kinetic energy
kinetic energy
idk last sorry =(
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.
Answer:B
Explanation:There you go
10. What illnesses or other damage to humans can be caused by UV light?
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
Answer:B
Explanation:
Plz help! I don't want internet answers plz :D
1. What determines weight?
2. What does Homogeneous mean?
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.
how to convert washing soda into sodium silicate
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
how does a lone pair contribute to molecular shape
Answer:
It takes up space like an "invisible" atom.
Explanation:
It's just right dawg.
WILL MARK BRAINLIEST Which statement describes the influence of latitude on temperature?
Latitude determines the duration of daylight.
Latitude prevents extreme heat and cold in coastal regions.
Latitude causes areas to experience cooler air at high elevations.
Latitude influences the movement of warm and cool air over land.
Answer:
The Answer is A!
Explanation:
Took the test and got a 90%
Latitude influences temperature by determining the duration of daylight.
What is Latitude?This is defined as the measurement on a globe or map of location north or south of the Equator.
It helps to determine the duration of daylight which is usually warmer hence influencing the temperature thereby making option A the most appropriate choice.
Read more about Latitude here https://brainly.com/question/437347
Why is the boiling point of 2 M NaCl solution higher than the boiling point of 1 M of NaCI solution?
Answer:
The fist option is correct
Explanation:
2 molecules of water have relatively large intermolecular force than a single molecule