Answer:
heat is added making it a chemical change
Explanation:
Answer:
With pancakes, the chemical reaction is between a leavening agent – such as baking soda & baking powder – & an acidic ingredient – such as buttermilk – producing tiny bubbles of carbon dioxide gas. These bubble form throughout the pancake, and are trapped as the batter cooks and solidifies
Explanation:
since there is a chemical reaction the pancakes cant be changed back into the ingredients after done.
which terms are used to identify pure substance
Answer:
Physical properties of a substance are characteristics that can be observed without altering the identity of the substance. Color, odor, density, melting temperature, boiling temperature, and solubility are examples of physical properties. Physical properties can be used to identify a pure substance.
Explanation:
Where is chemistry used?
A. In all areas of life
B. Only in the food industry
C. Mostly in medicine
D. Mostly in manufacturing
Answer:
A
Explanation:
chemistry is used in all areas of life
Answer: A
Explanation:
just got it right
If you know the volume and the density of an iron rod, how would you calculate the mass of that iron rod? Show a formula.
Answer: for an example
volume can easily be calculated: pi*(d^2/4)*length -> pi*[(7x10^-2)/4]*70x10–2 = volume of iron rod {VOIR}
Density = mass / volume
Therefore
Mass = density x volume
However, weight is equals to ‘mass x g (free fall acceleration’
So mass is in kg but weight is a force so simple force equation to where ‘a (acceleration)’ in ‘F=ma’ is ‘g’.
Hence,
Weight = 9.81 ms^-2 (is ‘g’) x 7870 kgm^-3 x VOIR m^3 is *insert calculated answer* N.
Explanation:
emelie is working on a science project. her task is to answer the question does rogooti a hair cream sold on tv affect the speed of hair growth in length her family is willing to volunteer for the experiment
Answer:
This question is incomplete and unclear; the complete question including the missing part is:
Emelie is working on a science project. Her task is to answer the question:
"Does Rogooti (a hair cream sold on TV) affect the speed of hair growth
(in length)". Her family is willing to volunteer for the experiment. Identify the control group (CG) and the independent and dependent variables.
ANSWER:
Independent variable: Rogooti hair cream
Dependent variable: Speed of hair growth/length
Control group: Family members that do not use the Rogooti hair cream
Explanation:
In an experiment, the independent variable is the variable that the experimenter changes or manipulates in order to bring about a measurable response. In this case, the ROGOOTI HAIR CREAM is the independent variable.
Dependent variable refers to the variable that is measured or the variable that responds to the change made to the independent variable. In this case, the dependent variable is SPEED AT WHICH HAIR GROWS (IN LENGTH).
Control group in an experiment is the group that does not receive the experimental treatment. In this case, the experimental treatment is the Rogooti hair cream, hence, the control group will be the VOLUNTEER FAMILY MEMBERS THAT DOES NOT RECEIVE THE ROGOOTI HAIR CREAM ON THEIR HAIR.
An atom has 17 protons, 18 neutrons and 17 electrons. What is the charge of its electron cloud?
Answer:
Neutral. There are equal amounts of protons or positively charged parts and electrons or negatively charged parts. The neutrons have no net charge which means this atom of chlorine is neutral.
Explanation:
9.Magnetization of iron is a physical change.
A true
B false
Answer:
This is true.
Explanation:
Magnetization of iron is a physical change and not a chemical change as there is no change of state, no change of temperature, no smell and no evolution of gas.
why plastic do not rust
Answer:
it can't rust simply because it doesn't contain any iron or any of it's alloys. In fact, not even all metals rust.
Explanation:
What is the difference between a physical and a chemical property? (please hurry)
Answer:
A physical property is a characteristic of a substance that can be observed or measured without changing the identity of the substance. ... A chemical property describes the ability of a substance to undergo a specific chemical change.
Explanation:
186000 written in scientific notation
Answer:
its 1.86 x 105
Explanation:
i learned it last year
Answer:
1.86 x 10^5
plz, mark brainliest
NEED ANSWER ASAP!! I would really aprecitate it! Please.
Explanation:
Positron..............How is particle motion related to thermal equilibrium?
Answer:
With billions of moving particles colliding into each other, an area of high energy will slowly transfer across the material until thermal equilibrium is reached (the temperature is the same across the material).
In paper chromatography, is the substance being tested the solute or the solvent?
Answer:
Explanation:
This is an awfully good question. Think carefully about which is which.
A solvent is something that will dissolve the solute.
So the solvent will carry the solute up (say) chromatography paper. It is the solute.
Explain why mixtures can be separated by physical methods, such as sieving and distillation.
which three elements have the most similar chemical properties
Answer:
K, Rb and Cs
Explanation:
Answer:
krypton, bromine, and argon
Predict which surface will melt ice faster. Wood or metal? Why?
Answer:
I believe wood wood melt it faster. Why, because of how compact it is. It would be warmer. Metal would be a cooler temperature.
Explanation:
Which of the following best describes a person doing science?
o A.
Dominick uses a computer to do his math homework.
O B. Lindsay measures the sizes of the craters on the Moon.
O C.
Isabel invents a new kind of doorknob.
o
D. Murray randomly predicts the result of a coin toss.
Answer:
B. Lindsay measures the sizes of the craters on the moon
Answer:
I think it's D but it's my (viewpoint)
In which layer of Earth's interior is the inferred temperature
6,000°C?
Answer:
outer core
Explanation:
the outer core is estimeted to be 6,000 C
aluminium oxide has a very high melting point (2072 degrees C) while carbon dioxide has a very low boiling point (-57 degrees C). Explain this difference clearly.
Please help I don’t get what it’s asking!!!
Answer:
Well, Aluminum Oxide has a very high melting point. Carbon dioxide has a very low boiling point.
Explanation:
They are both talking about different things, melting and boiling. Aluminum Oxide's melting point is much higher then carbon dioxide's melting point. Hope this help, and good luck on your assignment (if one)
Which element below has atoms with only two valence electrons?
Potassium
Sulfur
Magnesium
Neon
PLZ HELPS ME! WILL GIVE BRAINLIEST!!!!
1. In the mathematical equation for transverse waves, the symbol neu represents ts the _________.
A. Energy
B. Frequency
C. Speed of sound
D. Wavelength
2. What is the frequency of a 6.43 x 10^-5 m wave?
A. 4.66 x 10 ^ 12 hz
B. 5.5 x 10 ^ 7 hz
C. 1.03 x 10 ^ 4 hz
D. 1.2 10^15 hz
3. What is the wavelength of a 1.28 x 10^17 Hz wave?
A. 4.66 x 10 ^ 12 m
B. 8.1 x 10 ^4 m
C. 6.9 x 10^-8 m
D. 4.26 x 10^8 m
4. What is the wavelength of a wave having a frequency of 5.21 x 10^14 s-1?
A. 1.26 x 10^16 m
B. 7.1 x 10 ^ 7 m
C. 5.74 x 10^-7 m
D. 2.07 x 10 ^15 m
Answer:
1) wavelength
2) 1.03 x 10 ^ 4 hz
3) 8.1 x 10 ^4 m
Explanation:
Answer:
1) wavelength
2) 1.03 x 10 ^ 4 hz
3) 8.1 x 10 ^4 m
Explanation:
An element has a shiny metallic appearance and is both ductile and malleable. In which section of the diagram would the element most likely be found?
A.
1.
B.
2.
C.
3
D.
4
Answer:
Section 2 on the diagram (Option B)
Explanation:
These metals can be shiny, ductile, malleable, and are good conductors of heat and electricity.
you find a 2cmsquared piece of pure gold with a mass of 38.6 g. what is it's density?
Answer:
First change cm in m and mass is 38.6g. Volume. =200m
Explanation:
Now,
Density =mass /volume
38.6/200
0.193 density
Water, air, buildings, food, and everything visible and invisible have mass and takes up space. What is the word used to describe anything that has mass and takes up space?
Answer:
Matter
hope this helps
Answer:
matter
Explanation:
Did the test
Help fast. If 1500 joules of energy is used to heat 50g of water with a temperature of 20°C, then what will the final temperature be? (Water’s specific heat is 4.18 j/g°c)
Answer:
27°C
Explanation:
q = 1500 J
m = 50g
c = 4.18 J/g°C
q = m·c·ΔT
ΔT = [tex]\frac{1500J}{50g*4.18\frac{J}{gC} } = 7C[/tex]
ΔT = final temperature - initial temperature
Final temp = 20 + 7 = 27°C
How many electrons are shared between one nitrogen
atom and one carbon atom
How many inches/second are in
1.73 meters/minute?
A. 68.1 in./s
B. 0.0288 in./s
C. 1.14 in./s
D. 2.64 in./s
Answer:
1.73 meters / minute = 1.14 inches / second
Explanation:
The number of inches present in 1.73 meters/minutes is equal to 1.14 inches/seconds.
What is conversion factor?Conversion factor is a quantity which is get multiplied or divided with an any other given quantity to convert the given quantity into any other quantity.
Given quantity = 1.73 m/min
We know that, 1 meter = 39.37 inches
1.73 m/min = 1.73 × 39.37 = 68.11 inches/min
Also we know that, 1 min = 60 min to convert the above quantity into sec we should divide that by 60 as:
68.11 inches/min = 68.11 / 60 = 1.135 inches/sec (1.14)
Hence the required quantity is 1.14 in./s.
To know more about conversion factor, visit the below link:
https://brainly.com/question/97386
Muscles, bones, skin, and
organs are all mainly made up of
(PICK
ONE) -> Fats Fiber Minerals | Protein.
Answer:
The answer is Protein.
Draw the electric field lines between a proton and an electron. According to Coulomb's law, how would the electrical force between these particles change if the product of their electrical charge increased?
Explanation:
An electron has a negative charge and a proton is a positively charged particle. Electric field lines are used to express the direction of the electric field. For a positive charge, it is outwards while for a negative charge it is inwards. The attached figure shows the electric field lines between a proton and an electron. The field lines emerge from proton and terminate at electron.
The electrical force between charges is given by :
[tex]F=k\dfrac{q_1q_2}{r^2}[/tex]
r is the distance between charges
The force is directly proportional to the product of charges. It means that if the product of electrical charge increased, it means that the electrical force will increase proportionally.
Which of the following substances cannot be separated?
O homogeneous mixture
heterogeneous mixture
element
O compound
Answer: Elements.
Explanation: Homogeneous and heterogeneous is just if a mixture is uniform or not. Mixtures and always be separated. Compounds are elements that combined which can be broken down again. So I say the logical answer is an element since it's pure and cannot be broken down into other elements or more of it's self.
what state of matter of a substance depends on how the particles in that substance
Answer:
Solids is the answer hope this helps