Answer: TRACE evidence
Explanation: Any evidence that can be transferred from one person to another or one person to a place is trace evidence. Also I took the test.
Which element has the greatest average atomic mass?
Answer:
Oganesson is the number 118 the largest
***BRAINLIEST ASNWERRR***
How many grams are in 34.2 moles of Lithium (Li)?
Mass of Li = 237.38 g
Further explanationThe mole itself is the number of particles contained in a substance amounting to 6.02.10²³
[tex]\large {\boxed {\boxed {\bold {mol = \frac {mass} {molar \: mass}}}}[/tex]
KnownMoles of Li = 34.2
Molar mass(MW) of Li = 6.941 g/mol
then mass of Lithium (Li) :
[tex]\tt mol=\dfrac{mass}{MW}\\\\mass=mol\times MW\\\\mass=34.2\times 6,941~g/mol\\\\mass=\boxed{\bold{237.38~g}}[/tex]
Which is most likely a physical change? A. cutting a substance into four pieces or B. burning a substance into ash and smoke or C. reacting a substance chemically to form a new substance or D. combining a substance with water to make rust
Answer:
A. cutting a substance into four pieces
Explanation:
The others include burning, reacting, and rust which make up a chemical change.
Cutting a substance into four pieces indicates a physical change. The correct option is A.
What is physical change?Even before to and after a physical change, the material implicated is unique architectural the same.
Physical changes include texture, shape, heat, and the beginning of a change in the state of matter. The texture of a substance influences how it feels.
A physical change is simply a change in appearance. The situation has not changed since the change.
Physical change can be seen in the use of cutting paper, melting butter, dissolving salt in water, and breaking glass.
Chemical reaction takes place when bonds among molecules or atoms are broken or formed.
This implies that one material with a specific set of properties is transformed into another substance with a different set of properties.
Thus, the correct option is A.
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Why sulfur has a smaller radius than phosphorus?
Answer:
the radius of sulfur is smaller than the radius of phosphorous. This is because atomic radius tends to decrease as you go left to right across the periodic table. Because sulfur is farther right than phosphorous is, it has a a smaller radius.
Explanation:
hope this helps :)
only question 5 plz i’m times
Answer: plasma I think
Explanation:
What are the fundamental units of mass, length, and temperature in the
metric system? *
Answer:
Kg, meters or centimeters, Celcius
How do ionic bonds differ from covalent bonds?
Protons are transferred in an ionic bond.
Protons are shared in an ionic bond.
Electrons are shared in an ionic bond.
Electrons are transferred in an ionic bond.
Answer:
Electrons are transferred in an iconic bond.
is copper metal mixed with water an:
a) element
b) compound
c) heterogeneous mixture
d) homogeneous mixture
Answer:
I believe it is c or d I'm sorry I didn't give you one but I know it is not a or b
Which substance is a strong electrolyte?
O NH3
O Ba(OH)2
O C12H22011
O CH3COOH
Answer:
Ba(OH)2 is a strong base, so it conducts electricity well
Explanation:
The dissociation of a strong electrolyte is apparent by its reaction arrow, which only points toward products. In contrast, the reaction arrow of weak electrolytes points in both directions. The general form of the strong electrolyte equation is: Strong acids, strong bases, and ionic salts that are not weak acids or bases are strong electrolytes.
X NH3 is a weak base
X C12H22011 is neutral (not an acid or a base), therefore it a nonelectrolyte
X CH3COOH is a weak acid and it also dissociates partially.
The substance which is a strong electrolyte is Ba(OH)₂.
Hence Option (B) is correct answer.
What is Strong electrolyte ?Strong electrolyte can be defined as the substance that completely dissociates in to ions.
Strong electrolyte (aq) → cation⁺ (aq) + anion⁻ (aq)
Now lets check all options one by one
Option (A): NH₃
NH₃ is a weak base. NH₃ does not completely ionize so it is a weak electrolyte.
Hence it is incorrect option.
Option (B): Ba(OH)₂
Ba(OH)₂ is a strong electrolyte because it dissociates completely in water.
Ba(OH)₂ (aq) → Ba⁺² (aq) + 2OH⁻ (aq)
Hence, it is correct option.
Option (C): C₁₂H₂₂O₁₁
C₁₂H₂₂O₁₁ is a non electrolyte that means it does not dissociate into ions.
Hence, it is incorrect option.
Option (D): CH₃COOH
CH₃COOH is a weak electrolyte due to the presence of lowest number of ions it does not dissociate. It's ionization is very less.
Hence, it is incorrect option.
Thus, from the above conclusion we can say that The substance which is a strong electrolyte is Ba(OH)₂.
Hence Option (B) is correct answer.
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Is acetaminophen conductive in water?
Answer:
Yes, acetaminophen is conductive in water.
Explanation:
Have a nice day!
Acetaminophen is conductive in water and it is electrochemically active. It is used as an antipyretic drug.
What is acetaminophen ?Acetaminophen is an organic compound containing the amine functional group. One of the most popularly prescribed analgesic and antipyretic medications, acetaminophen (AC), is thought to be both effective and safe.
AC is not poisonous or harmful when used rationally, but an overdose or continued use may cause nephrotoxicity and severe hepatotoxicity. As a result, AC monitoring is crucial for drug safety.
Various conductometric measurements reported the fair conductivity shown by acetaminophen in water. The intermolecular interaction of acetaminophen in water make it conductive.
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What are the purposes of theories in science?
b. What makes a theory a “good theory”?
please help
Answer:
Scientific theories are testable and make falsifiable predictions. They describe the causes of a particular natural phenomenon and are used to explain and predict aspects of the physical universe or specific areas of inquiry (for example, electricity, chemistry, and astronomy).
A good theory in the theoretical sense is (1) consistent with empirical observations; is (2) precise, (3) parsimonious, (4) explanatorily broad, and (5) falsifiable; and (6) promotes scientific progress (among others; Table 1.1).
Can anyone help me? :D
A force is a push or pull that makes it possible to move an object. A force can also be used to
change the direction that an object is moving. The amount of force put on an object will
determine how far and fast the object will move. Nothing moves without some kind of force!
If you pull or push something, you are the force that is creating movement. The more you
push or pull, the farther and faster an object will go. But the heavier an object is, or the
more friction working against its movement, the harder it will be to move it.
What causes objects to move?
No
Answer:Forces include gravity, friction, and applied force. Force causes changes in the speed or direction of motion.
Explanation:
Answer:
Its force, Just did it. 100%
Explanation:
No explaination needed. I got it right.
Does acid rain make new substances?
Answer:
Over the past few decades, humans have released so many different chemicals into the air that they have changed the mix of gases in the atmosphere. ... In addition, the exhaust from cars, trucks, and buses releases nitrogen oxides and sulfur dioxide into the air.
What is the source of most of our current knowledge of Mercury's appearance and geology?
Please answer quick !!
The Earth has always been a hospitable haven for life. ture or flase
Answer:
True and false at the same time
Explanation:
It is true that Earth is heaven for life but It's also hell for life because people suffer a lot and so does the Earth. Earth is a hell for life because of all the bullying, criticism, racism, sexism, and homophobic people. Life is a great thing to enjoy but with all the negative things that happened and keep happening in the world, it's a living hell for a life. The only good things are that you can explore and do things you never thought of doing before and you are ale=ways surrounded by people who love you and appreciate you for who you are but it's a 5-50 chance of you getting an opportunity like that.
I'm not a negative person it's just the ways that things are. I hope this answers your question!
Have a nice day! UwU
1 mole of CH4 contains ________molecules
1 mole contains 6.023 *10^23 molecules
Ainsley wanted to know if caffeine impacted the rate a mouse learned a maze. He tested two groups of mice and timed them as they attempted to learn the maze. Lab group A received 5 mL of caffeine with their 20 g of grain. Lab group B received 20 g of grain without caffeine. Which is Ainsley's independent variable?
Answer:
Caffeine
Explanation:
In every study, there must be an independent variable and a dependent variable. The independent variable is being manipulated and its effect on the dependent variable is evaluated.
In this study, the independent variable is the administration of caffeine. Its effect on a rat's ability to learn the maze (dependent variable) is evaluated in the study.
The atmospheric pressure on a mountain is 550 mmHg and 1 atm is equal to 760mmHg. What is the pressure in atm? Give your answer to 2 significant figures atm
A student painted one wall black and one wall white. Which color of paint will most likely appear brighter?
Answer:
white
Explanation:
if you toward the right of the periodic table is it harder or easier to remove valence electrons?
Answer:
harder
Explanation:
Answer:
The increased distance weakens the nuclear attraction to the outer-most electron, and is easier to remove
Explanation:
please help if u can ty..
Answer:
a) [tex]BaF_{2}[/tex]
b) [tex]SnCl_{4}[/tex]
c) [tex]Cr_{2}O_{3}[/tex]
d) [tex]FeO[/tex]
e) [tex]Li_{3} P[/tex]
Explanation:
The charges of the ions have to be 0, so they balance.
a) [tex]Ba^{2+}[/tex] has the charge of +2 and [tex]F^{-}[/tex] has the charge of -1. So its [tex]0=(+2)+(-1)*2[/tex]. That means you need one [tex]Ba^{2+}[/tex] and two [tex]F^{-}[/tex] to balance the equation. -> [tex]BaF_{2}[/tex]
b) [tex]Sn^{4+}[/tex] has the charge of +4 and [tex]Cl^{-}[/tex] has the charge of -1. So its [tex]0=(+4)+(-1)*4[/tex]. That means you need one [tex]Sn^{4+}[/tex] and four [tex]Cl^{-}[/tex] to balance the equation. -> [tex]SnCl_{4}[/tex]
c) [tex]Cr^{3+}[/tex] has the charge of +3 and [tex]O^{2-}[/tex] has the charge of -2. So its [tex]0=(+3)*2+(-2)*3[/tex]. That means you need two [tex]Cr^{3+}[/tex] and three [tex]O^{2-}[/tex] to balance the equation. -> [tex]Cr_{2}O_{3}[/tex]
d) [tex]Fe^{2+}[/tex] has the charge of +2 and [tex]O^{2-}[/tex]has the charge of -2. So its [tex]0=(+2)+(-2)[/tex]. That means you need one [tex]Fe^{2+}[/tex] and one [tex]O^{2-}[/tex] to balance the equation. -> [tex]FeO[/tex]
e) [tex]Li^{+}[/tex] has the charge of +1 and [tex]P^{3-}[/tex]has the charge of -3. So its [tex]0=(+1)*3+(-3)[/tex]. That means you need three [tex]Li^{+}[/tex] and one [tex]P^{3-}[/tex] to balance the equation. -> [tex]Li_{3} P[/tex]
the closeness of a measurement to its actual value is a measure of its
A. usefulness
B. reproducibility
C. precision
D. accuracy
Plz help! The best answer will be marked as brainliest!
Make a funny sentence of alloys for Magnesium
Here is an example for Mercury, it HAS to for Magnesium
“I love to travel but I do corrode aluminum so we won’t be flying off on adventures in airplanes planes anytime soon”
Answer:
Megan trailer said pass the maga mic so I can sing, I'll call the mic magnesium
Explanation:
Get it cuz a mic is made out of magnesium
What is the material being extruded by Mount Mayon? Where do you think did this material come from?
The material being extruded by Mount Mayon is "Lava".
Throughout view of such increasingly prevalent eruption occurrences, the water level of the wells drilled in nearby crater Mount Mayon, this same present volcano together in dynamic condition, is beginning to decrease.The episodes have been characterized by a resilient oozing but also welling of lava, frantic ejection of blocks as large as vehicles, and angered release of thick ashes and sedimentary sprinkles up to a few 100 kilometers over the crater lip.
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Question 1: A new fat-burning pill for men is introduced. To test for effectiveness, 50 men are given the pill and 50 men are given a placebo. After 6 months, the men's body fat percentage is calculated. Identify the control group, the manipulated variable, and the responding variable. Explain how you can identify each.
Answer:
Explanation:
In the scenario that is being described the control group would be the 50 men that have been given the placebo because they are the ones that should not have any effects from the placebo and that is by design. The manipulated variable is the new fat-burning pill because it is the one that the scientists can change and modify to try and achieve the desired results. Lastly, the responding variable are the 50 men who are given the new fat-burning pill because they are the ones that will be responding to the effects of the pill and providing the data needed by the scientists.
A carver begins work on the following block of granite that has a mass of 2700 g. What is the density of the granite? 10 cm 5 cm 20 cm What is the volume of the granite? cm3 What is the density of the granite? The piece of granite would g/cm3 (float, sink) in water because
Answer:
I would say it would float do to the density a weight is not heavy enough to sink
Explanation: ✪ ω ✪ Hope Dis Helped!
Which is it , if you are right I will give brainliest
Answer:
a
Explanation:
The leaf layer containing most of the chloroplasts is the:
O spongy layer
Owaxy layer
O palisade layer
cortex layer
I NEED HELLPPPPP PLEASEE I WILL GIVE BRAINLYYY
Answer:
O spongy layer is the right answer
to get dry ice to the triple point
PLEASE HELP !!