Answer:
do you have a picture of the choices?
The oldest known flower lived 120, million years ago. Is that a measured or exact number?
Answer:
measured
Explanation:
no way can they pin point exactly when something lived when its in the millions
If a wave is traveling at 36 m/s and has a frequency of 6 Hz, what is its wavelength?
Answer:
wave length=speed*frequency
=36*6
=216 m
Select the correct balanced equation for the single displacement reaction of bromine and potassium iodine.
Br + Kl -> KBr +1
Answer:
D
D...............DDDDDDD
Answer: D
Explanation:
The answer is D as it is the only correctly balanced equation.
Which is an example of a chemical reaction?
A) Tearing up your last science test.
B) Eating a antacid to calm your upset stomach. C) Rubbing your hands together to warm them. D) Pouring water on a cut to wash off the germs.
Answer:
B) Eating a antacid to calm your upset stomach.
Explanation:
Compounds
are the same as molecules
have the same properties as the elements they are made from
have different properties from the elements they are made from
can only exist as solids or liquids
Answer:
have different properties from the elements they are made from
Explanation:
Compounds have different properties from the elements they are made from. Compounds are substances composed of two or more kinds of atoms/elements joined together in a definite grouping.
The properties of a compound are distinct and different from those of the individual elements that are combined in its make-up. There are several millions of compounds that are known. These are derived from elements.Answer:
Que?
Explanation:
I’ll mark brainliest!!! Please solve and say what reaction type.
Answer:
2Al + 6HCl -----> 2AlCl3 + 3H2
Reaction of acid with metals
Cu(OH)2. -----> H2O. + CuO
Dissociation of coper hydroxide / dissociation of base
Explanation:
What chemicals need to make liquid bakelite ?
How can a chemical reaction speed up? Pack in more of the reactant to increase the
A. catalyst B. concentration
C. surface area
D. temperature
Answer:
A. catalyst.
Explanation:
Catalyst is something that causes things to decay. I think catalyst is the right answer from what i know from Miraculous Ladybug... Did you know the show was originally going to be an anime?
If you put an iron nail into a beaker of copper chloride, you will begin to see a reddish precipitate forming on the nail. In this reaction, iron replaces copper in the solution and copper falls out of the solution as a metal.
The balanced equation is Fe+CuCl -> FeCl2+Cu
If you start out with one mole of your limiting reactant (Fe), how many grams of copper can you expect to produce through this reaction?
Answer:
63.6g
Explanation:
The reaction expression is given as:
Fe + CuCl₂ → FeCl₂ + Cu
Given:
Number of moles of Fe = 1 mole
Unknown:
Mass of copper that would be produced;
Solution:
From the balanced reaction expression:
1 mole of Fe will produce 1 mole of Cu;
So;
Mass of Cu produced = number of moles x molar mass
Mass of Cu = 1 mole x 63.6g/mol = 63.6g
FUСR THE WORLD SAY AND TO 4142-414=? HELPPPPPPPPPPPPP
Answer:
UMMMMMMMMMMM
Explanation:
Answer:
3729
Explanation:
How many grams of Fe3+ are present in 2.56 grams of iron(III) iodide?
Answer:
436.55841 grams.
Explanation:
The molecular formula for Iron(III) Iodide is FeI3. The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles Iron(III) Iodide, or 436.55841 grams.
You use the 1 / 436.55841 conversion rate. This is different for each element, according to the stoichiometry tables. Iron(II) oxide would be 2/3 of the 1/436.55841 conversion rate, that is, multiplying the fraction to denominator.
At what step of glycolysis one NADH+ H+ is formed?
Answer:
During Glycolysis, there is one step where NADH + H+ is formed from NAD+ O F-6-P - F- 1,6-BP O PGAL – 1,3-BPGA O 2-PGA - PEP O 3-PGA → 2-PGA.
I WILL GIVE 50 POINTS AND BRAINLIEST TO WHO EVER ANSWERS THIS RIGHT AND FAST!!! PLS!!!!
The diagram below shows a beaker with two compartments separated by a semipermeable membrane.
The membrane does not allow salt particles to pass through.
What will most likely be observed in the beaker?
Water level will rise in compartment X.
Water level will rise in compartment Y.
Water level remains same as water cannot pass through.
Water level remains same as there is no difference in the concentration gradient.
Answer: D
Explanation: I took the quiz! Module 04.06! Have a good day!
Answer: Water level remains same as there is no difference in concentration gradient.
Explanation: When concentration inside and outside of the cell membrane is the same, no transport takes place and the levels will remain the same.
is a planar carbon "backbone" possible for propane? Explain.
Is a planar carbon "backbone" possible for cyclopropane? Explain.
Answer:
Cyclopropane has a planar carbon back bone while propane does not
Explanation:
We have to recognize that in straight chain saturated organic compounds, carbon atoms have a tetrahedral geometry. Each carbon atom is bonded to four other atoms.
However, carbon atoms in cyclic compounds are also sp3 hybridized with each carbon bonded to only four other atoms but the ring system is highly strained.
Cyclopropane is a necessarily planar molecule with a bond angle that is far less than the expected tetrahedral bond angle due to strain in the molecule. Hence, the carbon atoms may have have a "planar backbone".
Analysis of an unknown substance indicates that it is a brittle solid. It acts as an electrical insulator (does not conduct) as a solid but conducts electricity when melted. Which of the following substances would have these characteristics?
a. HCl
b. Al
c. KBr
d. SiF4
e. I2
Answer:
KBr
Explanation:
A metal has a very high melting point. Aluminum is a metal.
Ionic solids do not conduct electricity in the solid state. However, when the solids are melted, they conduct electricity.
KBr is an ionic substance, it can only conduct electricity in molten form because the ions are locked up in the solid.
I need help on these questions!
Answer:
See explanation
Explanation:
Given that;
E = hc/λ
h = 6.63 * 10^-34 Js
c = 3 * 10^8 ms-1
λ = ?
E = 3.978 * 10^-19 J
λ = hc/E
λ = 6.63 * 10^-34 * 3 * 10^8 /3.978 * 10^-19
λ = 19.89 * 10^-26/3.978 * 10^-19
λ = 5 * 10^-7 m The colour is green
2. E = hc/λ
E= 6.63 * 10^-34 * 3 * 10^8 /1000 * 10^-9
E = 1.989 * 10^-19 J
But
E = hf
f = E/h
f = 1.989 * 10^-19/6.63 * 10^-34
f = 3 * 10^14 Hz The radiation is infrared
3. E = hc/λ
λ= hc/E
λ= 6.63 * 10^-34 * 3 * 10^8 /2.0 * 10^-14
λ= 995 * 10^-14 m This is gamma radiation
4. E = hc/λ
E=6.63 * 10^-34 * 3 * 10^8 /620 * 10^-9
E = 3.2 * 10^-19 J
5. E = hf
E= 6.63 * 10^-34 * 2 * 10^17
E = 1326 * 10^-19 J
E = hc/λ
λ= hc/E
λ= 6.63 * 10^-34 * 3 * 10^8 /1326 * 10^-19 = 15 * 10^-9
This is ultraviolet radiation
Describe briefly how you will determine the relative density of kerosene
Explanation:
First determine the weight of the density bottle(A1) when it's empty.
Then fill it with the liquid you want to determine the density.
Then determine the weight of the bottle with the liquid(A2).
Then the weight of the liquid is equal to (A2 - A1)
You already know the volume of the bottle.
Apply them to density = weight/volume
Make sure to mention the temperature you measured it because density varies from one temperature to another.
write few lines about luis braille
Answer:
Louis braille was a french educator and inventor of a sytem of reading and writing for use use by the blind or visually impaired . his system remains virtually unchanged to this day and is know worldwide simply as braille
Does a ticking clock involves energy?
Answer:
yes
Explanation:
Which of the statements about liquids and gases are true?
Both liquids and gases have a definite volume.
O The particles in liquids and gases can move past one another
freely
Both liquids and gases have a definite shape.
Neither liquids nor gases have a definite shape.
Which of the statements about liquids and gases are true?
Answer:The particles in liquids and gases can move past one another freely.
#CARRYONLEARNING #STUDYWELLWhich of the statements about liquids and gases are true?
Choosing:Both liquids and gases have a definite volume.
The particles in liquids and gases can move past one another freely
Both liquids and gases have a definite shape.
Neither liquids nor gases have a definite shape.
Answer:The particles in liquids and gases can move past one another freely.
#READINGHELPSWITHLEARNING #CARRYONLEARNING #STUDYWELL1. What are the two effects of the continental plate/continental plate convergent boundary?
2. Where can you find an example of this type of divergent boundary? Which country, continent or ocean?
Answer:
Answer 1: The correct answer is b. convergent continental-continental boundary.
A convergent continental-continental boundary refers to a convergent plate boundary where two continental plates meet or come together. When this happens, a forceful collision occurs, and structures like mountains start to form. The Himalaya mountain range is formed as a result of the convergence of the Indian and Eurasian continental plates.
Answer 2: The correct answer is d. convergent oceanic-oceanic boundary.
Volcanic island arcs refers to a curved line of volcanoes formed from the subduction (sinking) of one oceanic plate below another plate. Examples of volcanic island arcs include Japanese Islands and Alaskan Islands
What is the mass, in grams, of a pure iron cube that has a volume of 3.80 cm?
Answer:
2.66 g of Fe, can be obtained from the reaction
Explanation:
Let's think the reaction:
2Fe₂O₃ + 6CO → 4Fe + 6CO₂
Ratio is 2:4, so If i have x moles of iron (III) oxide, I will produce the double of moles of Fe.
Mass / Molar mass = Mol
3.80 g / 159.7 g/m = 0.0237 moles
0.0237 moles . 2 = 0.0475 moles
Molar mass Fe = 55.85 g/m
Mol . Molar mass = Mass → 0.0475 m . 55.85 g/m = 2.66 grams
Explanation:
Explain how the biogeochemical cycle are essential for life.
Answer: Explain how the biogeochemical cycles are essential for life
Biogeochemical cycles are critical to the existence of life, transforming energy and matter into usable forms to support the functioning of ecosystems, as noted previously. ... Carbon is an essential element in the bodies of all living organisms and an essential source of energy for many organisms.
Construct an explanation using Newton's Laws of Motion to describe the effects of balanced and unbalanced forces on the motion of an object.
Answer:
The manner in which objects will move is determined by the answer to this question. Unbalanced forces will cause objects to change their state of motion
Explanation:
Since these two forces are of equal magnitude and in opposite directions, they balance each other.
Answer:
balance force are those force whose resultant force is zero and unbalanced force are those whose resultant are non zero
Which of the following is an internal adaptation that enables birds to fly?
A. Feathers
B. Hollow bones
C. Sharp beaks
D. Sharp claws
What was the unknown metal?
Answer:
is there a picture or something?
Explanation:
Explanation:
Your question is incomplete please update it.
What do scientists think is the
reason the mollusks have been so
successful through time?
B
Answer: Body plans change as new challenges arise.
Explanation:
The mollusks are the invertebrate animals. They live marine environment. They live in shallow waters. They have been found in variety of marine habitats so this indicates their adaptiveness to different conditions. They have body plan that comprises of shell, mantle, radula and muscular foot that helps in survival and adaptation in different conditions. The shell and mantle are hard structures which protect these animals from predators and also help them to camouflage. Also the muscular foot helps in locomotion. Radula helps in feeding. Oysters, snails are some examples of mollusks.
what is the mole fraction of cation in 1M of aluminium sulphate
The mole fraction of cation (Al)=0.4
Further explanationGiven
1 M of Aluminium sulphate
Required
The mole fraction of cation
Solution
Ionization of the Aluminum sulfate solution( assume 1 L solution ) :
mol Al₂(SO₄)₃ = M x V = 1 M x 1 L = 1 mol
Al₂(SO₄)₃⇒2Al³⁺ + 3SO₄²⁻
1 mol 2 mol 3 mol
From this equation, total mol in solution = 2+3 = 5 moles
Mol fraction Al(as a cation) :
= 2/5=0.4
A dolphin travels a distance 20 miles up the coastline in 153 minutes. If 1 mile is equal to
1609 meters, then what is the dolphin's average speed in meters/second rounded to the
nearest tenth?
+/-
HELP ME PLEASE
Answer:
3.51m/s
Explanation:
Given parameters:
Distance = 20miles
Miles to meters:
1 mile = 1609m
20miles = 20 x 1609 = 32180m
Time = 153minutes
1 min = 60s
153min = 60 x 153 = 9180s
Unknown:
Average speed = ?
Solution:
To solve this problem;
Average speed = [tex]\frac{distance }{time taken}[/tex]
Average speed = [tex]\frac{32180}{9180}[/tex] = 3.51m/s
Sodium chlorite decomposes into salt and oxygen gas. What is the correct balanced decomposition reaction.
NaClO3 -> NaCl + O2
Answer:
i think it would be c
Explanation:
sorry if it is wrong
Answer:
2NaClO₃ -> 2NaCl + 3O₂
Explanation:
The number of atoms in the reactants has to equal the number of atoms in the products.
Hope that helps.