Answer:
A
Explanation:
Benedict's test is the ideal standard test to distinguished between reducing(glucose) and Non reducing(diasaccharides,sucrose).
Benedict's tests gives a positive test for the presence of reducing sugar,with the initial mixture of the sugar solution changing from the initials green and orange color and brick red precipate of copper (ii) ,which would not dissolve in solution.
However, with non reducing the Benedict's gives a negative test.Because no color change occurs.
In either case,the chemical reaction that occurs as the solution gained heat is exothermic and this may lead to boiling of the solution and spilling onto the burner,which may lead to explosion.
A student wants to see how temperature affects the
production of gases when yeast and water are mixed. She
mixes them at different temperatures in clean soda
bottles. She then places a balloon over the top of each
bottle.
Which statement best describes the use of the balloons in this experiment?
Answer:
To monitor Pressure increase
Explanation:
the more pressure, the higher the production of the gas, which can be recorded, more pressure meaning higher production. Then vary the temperature.
Answer: Logical, Because it allows the student to catch any invisible gases given off. I hope this helps
Explanation:
Is one unlit match an example of a physical or chemical change, or a physical or chemical property?
I believe it’s physical property because there is no chemical reaction to an unlit match♀️
Red dye can be made from a mixture of yellow dye and magenta (a deep purplish red) dye. How could you determine if a particular red dye is made from a single dye or from a mixture of yellow and magenta dyes?
Answer:
When preforming the experiment the red dye will separate if it had other dyes included in it
Explanation:
Paper chromatography is a good way of separating coloured substances mixed together in a solution. During chromatography, the solvent soaks up the paper past the spot of the mixture and the different substances move upwards too. They move different distances depending on what kind of substance they are, what the solvent is and how far the solvent itself travels.
Currents shape rivers over long periods of time.
Please select the best answer from the choices provided
True
False
Answer:
True
Explanation:
Most rivers begins life as a tiny stream running down a mountain slope..... small streams meet and join together, growing larger and larger until the flow can be called river. On its way down, the water shapes the landscape by wearing away rocks and carving out a network of valley.
What is the solution for x in the equation? -3x + 7x − 8 = 34 + 9x − 2
Answer:-8
Explanation:
edmentum
The solution for the given linear equation can be solved by simplifying the equation. The value of x is obtained as - 8.
What is linear equations?Linear equations are the equations which shows a linearity with a second expression which is similar to the first but having different mathematical operations and signs.
By solving linear equations we can solve for the unknown value of x. The value of x can be obtained by taking the whole expression to one side and which is having a constant value.
Given, - 3x + 7x - 8 = 34 + 9x -2.
= 4x - 8 = 32 + 9x
= 4x - 8 - 9x = 32
-5x = 40
x = - 40/5 = - 8.
Hence, solution of the given equation is -8.
To find more on linear equations, refer here:
https://brainly.com/question/29739212
#SPJ2
Which of the following are examples of plasmas?
Answer:
i will tell some examples of plasmas they are:
1.lightning
2.solar wind
3.welding arcs
4.stars(including the sun)
5.the earths's ionosphere
Answer: which of the following are examples of plasmas?
Choices: 1. Ice cubes 2. Tails of comets 3. A gas fire 4. The ionosphere 5. A neon sign 6. A flashlight
Explanation:
The Answer: is 2. Tails of comets 4. The ionosphere 5. A neon sign
Write the number in scientific nation form
Answer:
its already in scientific notation form however its ordinary or real form is -0.005682
Explanation:
scientific notation
when a number is expressed with some power of 10 multiplied by a number between 1 to 10 is called scientific notation
Is Coca Cola a homogeneous mixture
Answer:
Yes
Explanation:
Coca Cola is a homogenous mixture, just like sugar, salt, and more. Hope this helps!
Answer: Yes
Explanation: Coca cola is a homogeneous mixture because the syrup and water are mixed evenly throughout the solution. For example, an unopened soda in a bottle has a uniform composition and is a homogeneous mixture. Once you open the bottle, bubbles appear in the liquid. The bubbles from carbonation are gasses, while the majority of the soda is liquid. An opened can of soda is an example of a heterogeneous mixture.
Hope this helps^^
HELP!!! What two volume units have the same value?
Answer:
1milliliter=1cubic centimeter
Answer:
volume and density I'm pretty sure
Which of the following are common behaviors of scientists? a.doing background research b. testing ideas with experiments c. analyzing data from tests d. reporting results to others e. all of the above
Answer:
Explanation: It is B. all above
You want to place a piece of glass tubing into a ruber stopper after the tubing has been fire polished and cooled. This is best done by
Answer:
All of the above
Explanation:
This is correct
Which of the following is a compound?
Select the correct answer below:
Water
Sodium
Chlorine
Oxygen
water
explanation:
water consists one oxygen atoms and two hidrogen of atom.
compound: have two or more atom
Hope this helps :)
2. Briefly describe how the law of conservation of mass was developed.
Answer:
History of the Law of the Conservation of Mass
The ancient Greeks first proposed the idea that the total amount of matter in the universe is constant.This law states that, despite chemical reactions or physical transformations, mass is conserved that is, it cannot be created or destroyed within an isolated system.
Explanation:
A neutral atom has an equal number of positive and negative charges. If a neutral fluorine atom has 9 protons and 10 neutrons, how many electrons will it have?
Answer:
9 electrons.
Explanation:
Number of electrons = number of protons
= 9.
PLZ HELP!!! ILL MARK BRAINLIEST!!! Would you consider the practice of "ghost hunting” to be closer to science or pseudoscience, based on the information provided in the article? Provide two examples to support your answer.
Answer:
I would consider the practice of "ghost hunting” to be closer to pseudoscience than science because the work described in the article mostly lacks process and is subjective. In the article, people looking for evidence of ghosts do not set up controlled experiments with repeated trials. Instead, they take several measurements and make guesses about what might be causing the results they see. The people in the article also base conclusions on observations such as feeling a "heavy presence” or a "sudden chill.” These are subjective observations.
Explanation:
Answer:I would consider the practice of "ghost hunting” to be closer to pseudoscience than science because the work described in the article mostly lacks process and is subjective. In the article, people looking for evidence of ghosts do not set up controlled experiments with repeated trials. Instead, they take several measurements and make guesses about what might be causing the results they see. The people in the article also base conclusions on observations such as feeling a "heavy presence” or a "sudden chill.” These are subjective observations.
Explanation:
What is the mass number of an atom with 17 protons, 17 electrons, and 20 neutrons?
Plz answer these questions :
Answer: 2) see below
3) 2AgCl → 2Ag + Cl₂
Explanation:
2)
Step 1: Crushing & Grinding CuFeS₂(s)→ CuFeS₂(s)
Step 2: Froth Flotation CuFeS₂(s)----> CuFeS₂ (l)
Step 3: Roasting 2CuFeS₂(l) + 3O₂(g) → 2FeO(s) + 2CuS(s) + 2SO₂(g)
Step 4: Converting matte to blister Cu₂S(l) + O₂(g) → 2Cu(l) + SO₂(g)
Step 5: Anode Casting Cu(l) → Cu(s)
Step 6: Electrolytic Refining Cu(s) → Cu(s)
Anode: Cu(s) → Cu₂ + (aq) + 2e-
Cathode: Cu2 + (aq) + 2e- → Cu(s)
see diagram below for illustration of steps
3) When silver chloride (solid) is exposed to sunlight, it decomposes into silver (solid) and chlorine (gas).
The equation is written as: [tex]2AgCl_{(s)}\xrightarrow{\text{sunlight}}}2Ag_{(s)}+Cl_{2(g)}[/tex]
The sodium atom loses an electron to form a sodium Ion (Na+). Which statement is correct with respect to its atomic radius?
O A. The sodium ion has a larger radius than the atom.
OB.
The sodium lon has a smaller radius than the atom.
OC.
The sodium ion and the sodium atom radil are the same size.
OD
The sodium ion has twice the radius of the sodium atom.
Answer:
sodium ion has smaller radius than a atom.
Explanation:
which should I choose?
Answer:
liquid
Explanation:
thank me
Consider the development of atomic theory. The last piece of the atomic puzzle was the discovery of
A)
electrons in orbitals.
B)
the neutron in the nucleus.
C)
a dense, centrally located nucleus.
D)
the location of the electron cannot be determined.
Answer:
The answer will be B
Explanation:
Answer:
B.the neutron in the nucleus
Explanation:
HELP ASAP!! 15 PTS!! Match each of the unknown ions to its appropriate description.
1. B+
2. A−
3. D2+
4. C2−
a. A nonmetal that gained one electron
b. A metal that lost one electron
c. A nonmetal that gained two electrons
d. A metal that lost two electrons
Answer:
1 and a
2 and b
3 and c
4 and d
Explanation:
+ = gained
- = lost
when there is a two it has two electrons
I also had a high school friend check my accuracy
HOPE THIS HELPS!!!! :)
<3333333333
Answer:
The answer above is wrong. Under explanation it is correct.
Explanation:
1. c
2. b
3. a
4. d
I took my test and got it wrong using above answers, but these are correct! ; /
PLZ HELP!! ILL MARK BRAINLIEST!! What claim do ghost hunters make about energy-detecting devices? They can determine how many spirits are in one location. They can produce sounds that may be confused with ghosts. They can sense the presence of spiritual energy. They can distinguish good spirits from evil spirits.
Answer:
[See Below]
Explanation:
I mean they say all those things , but if it has to do with just the device I'm guessing it'd most likely be They can sense the presence of spiritual energy since they claim it's the device they are using to tell them if there is something there they can't see.
Answer:
The Awnser is C (pls give me brainliest if this awnser is correct)
Explanation:
What is the connection between Archimedes and the Mass-Volume lab
Answer:
Explanation:
This question is not very clear, however, going by the key words in the question, Archimedes' principle shows a relationship between mass and volume.
Archemedes' principle states that when a body is fully or partially immersed in fluid, it is acted upon by an upward force which is equal to the weight of the fluid displaced by the body.
The volume displaced here can be determined using the formula
Density of liquid = mass displaced ÷ volume
Hence, volume = mass displaced ÷ density of liquid
If the pressure of a 2.00 L sample of gas is 50.0 kPa, what pressure does the gas exert if its volume is
decreased to 20.0 mL?
Which equation should you use?
V1 V2
T1 T2
P1V1 = P2V2
V1 V₂
N1 N2
Answer: P1V1 + P2V2
Explanation:
10g sugar is dissolved in 90g water.The density of the solution is 1.09g/ml.Calculate mass/volume percentage concentration of the solution.
Is the following statement a fact,, opinion, or theory? Why?
Scrambled eggs are better for breakfast than cereal. I can stay full longer if I eat eggs.
Answer:
i think opinion cause you could be saying in my opinion, scrambled eggs are better for breakfast than cereal.
HIFT|d/c/ 113 r 12
a b/c 9.416666667
ard Deviation SD (MODE 2
Data: 20X5, 30X4, 40, 10X6
ALPHA SC SC1
20 ALPHA 5 DATA 3
[1] 6][ALPHA
SHIFT
3 a b/d 40
9r5r 12
10 aim
160 mt at
and
helium
5. sample 07
25 degree
occupies
volume
volume of
it occupy 17
the
IS
will
dear
pressure
degree celsius. What
eased
to
8 atm
at
constant
temperature?
Answer:
hey guys are doing. . I have been in business for a new job and I will be a great time , and I will be a good timeExplanation:
for me, but the best. . the first one. . the first one
What is the formula for 2-methylnonane
Answer:
C10H22
sorry if im wrong
PLEASE HELP
You have four water samples at different temperatures. In which sample are the molecules vibrating at the fastest speed?
O A. water at 37°C
O
B. water at 99°C
C. water at 99°F
OD. water at 299K
a. 165 lbs = ?? g
b. 12.01 cm = ?? m
Answer:
a) 74842.7 g
b) 0.1201 m
Explanation:
1 pound is 453.592 g
165 pound = 74842.7 g
12.01 / 100 = 0.1201 m