Answer:
Water+Heat
proof of physical reaction
Explanation:
Chemical reactions are reactions that can't be undone ex cooking and egg.
Physical reactions are reactions that can be undone ex boiling water.
Answer:
Egg + Heat = Chemical Change
Explanation:
This is a chemical change because it cannot be undone. Once it changed its form you could not revert it back to its original self.
I hope this helps you! :)))))
Which element has four times as many protons in its nucleus than are found in Neon?
Answer:
Zirconium, Zr, 40
Explanation:
Protons can be found by looking at the atomic number. Neon's atomic number is 10, so just multiply 10 by 4 and you get 40.
Is it true or false??. . .Help me please
Answer:
I think the answer is true
1s^ 2 2s^ 2 2p^ 6 3s^ 2 3p^ 6 4s^ 2 3d^ 10 4p^ 2 what element is this
Answer:
please use shell notation
Convert 0.0134 Liter to millimeter
Answer:
13400 millimeters.
Explanation:
Multiply the volume value by 1e+6
In an isotope, what does the 'u' stand for?
For example: Lithium isotope: Li-6 6u
The u after 6
2.18 x 10^6 ng = 2.18 x 10^? mg
Answer:
2.18 * 10^12 mg
Explanation:
1 nanogram [ng] = 10^6 milligram [mg]
2.18 * 10^6 ng/ 1 ng = X mg / 10^6 mg
X mg = 2.18 * 10^12 mg
Answer:
2.18 * 10^12 mg
Explanation
What do we call the (+) ion in an ionic bond? *
O Cation
O Anion
O Metalloid
O Covalent
Answer:
cation
Explanation:
a cation is an ion with a postitive charge. This (cat)ion (+) = cats are good , anion (onion) are not good (-)
What mass of ethanol will All
a 250.0 ml container if its
density is 0.789 g/ml?
Answer:
The answer is 197.25 gExplanation:
The mass of a substance when given the density and volume can be found by using the formula
mass = Density × volumeFrom the question
volume = 250 mL
density = 0.789 g/ml
So we have
mass = 250 × 0.789
We have the final answer as
197.25 gHope this helps you
how many molecules are in 3.40L of H2O vapor at STP?*
Answer:
9.14 x 10^22 molecules
Explanation:
helpppppppppp please
what did max planck discovery?
Answer:
Max Planck discovered the quantum of action
Explanation:
write the molecular fotmula of water
Answer:
H20
Explanation:
Answer:
hope it helped you
Explanation:
H2O (u have to write ✍️no 2 below H.
2
A train travels 25 km in 0.5 hrs. How fast is the train going?
Answer:
15
Explanation:
Answer:
50 km/h
Explanation:
Since in half an hour it has gone 25km, double that (25 x 2) and you get your answer in km/h. Therefore, the train is going 50km/h.
A sample has a PH of 4, and another sample has a PH of 9. Which sub is the base? How many times basic is it??
Answer:
the first one
Explanation:
the first one is the base because it has a lower PH
Convert the following to Celsius
16) 100°K
17) 200°K
18) 273°K
19) 350°K
Answer:
16) -173.15cel
17)-73.15cel
18)-0.15
19)76.85
Explanation:
I converted kelvins to cel
Brainly pls
Which of the following has the smallest radius?
A. Br-
B. Br
C. I-
D. I
B) Br
..................
Which element would be the least similar to magnesium (Mg)?
A. Sr
B. Na
C. Be
D. Ca
Answer:
B: NA
Explanation:
this is the apex answer
If its density is 34 g/ml, what is the mass of 120.0 ml of the liquid?
Answer:
The answer is 4080 gExplanation:
The mass of a substance when given the density and volume can be found by using the formula
mass = Density × volumeFrom the question
volume = 120 mL
density = 34 g/ml
We have
mass = 34 × 120
We have the final answer as
4080 gHope this helps you
Which formula is an ionic compound?
A.NaF
B.N2
C.NO2
D.CO2
FIRST ACCUAL ANSWER GETS BRAINLIST :)
Answer:
NaF
Explanation:
Answer: the answer is Naf
Explanation
and I love pop tart kitties OWO but i hope this helped i have a in science so i got 100% on it bye bye OWO
Hydrochloric acid and sodium hydroxide can be combined to form sodium chloride and water. Which best explains the reaction?
Answer:
Explanation:
Hydrochloric acid and sodium hydroxide can be combined in equal ratios to form sodium chloride and water. Which best explains the reaction? The total volume produced by combining hydrochloric acid and sodium hydroxide will result in the same volume of sodium chloride and water.
what is the density of an object with a mass of 100 grams and a volume of 50 cm
Answer:
2
Explanation:
because 100÷50=2m÷v=d
Jose adds five grams of a chemical to one liter of liquid and observes a reaction. If the reaction is endothermic, what will happen?
A
The liquid's mass increases; therefore, the volume of the liquid will increase
B
The liquids' mass decreases; therefore, the volume of the liquid will decrease.
С
Energy is released during the reaction; therefore, the temperature of the liquid will increase.
Energy is absorbed during the reaction; therefore, the temperature of the liquid will decrease.
D
Answer:
D. Energy is absorbed during the reaction; therefore, the temperature of the liquid will decrease
Explanation:
In a chemical reaction, the reaction is said to be ENDOTHERMIC if the reaction utilizes or uses energy instead of given it off. In this reaction, Jose adds five grams of a chemical to one liter of liquid and observes the reaction.
According to this question, the reaction is ENDOTHERMIC. This means that energy is absorbed or used up during the reaction; therefore, the temperature of the liquid will decrease i.e. the liquid used in the reaction will become COLDER.
How can charged objects interact without touching
Compare and contrast Transverse Waves and Longitudinal Wave
there, so you can have choices, though they all mean the same thing.
What determines the carrying capacity of an environment
Carrying capacity, or the maximum number of individuals that an environment can sustain over time without destroying or degrading the environment, is determined by a few key factors: food availability, water, and space
Can someone please help
Answer:
3
Explanation:
3 ampers (it says in the problem)
Which statement best describes the difference between veins and arteries? *
veins carry oxygen rich blood back to the heart while arteries carry oxygen poor blood
away from the heart
veins carry oxygen poor blood back to the heart while arteries carry oxygen rich blood
away from the heart.
brings oxygen into the lungs and releases carbon dioxide and water (waste materials)
from the body
arteries carry blood that is carbon dioxide rich to the heart,
Answer:
Veins carry oxygen poor blood back to the heart while arteries carry oxygen rich blood
Can you tell me the Valence Electron of each element?
Answer:
Lithium oxide.......................
Explanation:
6. magnicium chloride
2.Barium chloride
3. calcium nitride
4. lithium oxide
5. Aluminium sulphide
plzz mark me brainliest
The elements least likely to form bonds are found in which group? 15 16 17 18
Answer:
i think 15 but dont get mad if not (❁´◡`❁)
Explanation:
Answer:
The answer is 18
Explanation:sorry if im wrong TwT
Is carbon a metal or a nonmetal? How many valence electrons does a carbon atom have?
Answer:
Carbon is a solid non-metal element. Carbon has eight valence electrons.
Explanation:
Hope this helps!!
Apps
What do you already know about mass, weight, and gravity?
Answer:
they are the three states of matter