Answer: yes they are
Explanation:
because its so hot and the heat just stays at the bottom
Maria wants to determine which type of disinfectant kills the most bacteria.
Which of the following is the best way for Maria to determine this?
A.
Interview ten different people to determine which type of disinfectant they prefer.
B.
Put the same amount and species of bacteria on ten identical plates, and add ten different kinds of disinfectant to each plate.
C.
Ask ten different companies that make disinfectants which type is best.
D.
Put the same amount and species of bacteria on ten identical plates, and add a different disinfectant to each plate.
A I think thats what I would put
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
How can charged objects interact without touching
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.
Is it true or false??. . .Help me please
Answer:
I think the answer is true
Electron Dot Structures
Draw the electron dot structures for the following elements:
Magnesium (Mg)
Lithium (Li)
Argon (Ar)
Carbon (C)
Sulfur (S)
Helium (He)
Aluminum (Al)
Nitrogen (N)
Silicon (Si)
Hydrogen (H)
Calcium (Ca)
Neon (Ne)
Potassium (K)
Boron (B)
Chlorine (Cl)
Answer:
surf (S)
tide (T)
champion (C)
Explanation:
wag mo nlng pansinin
Crystallisation is a separation technique used to separate____ solids from a liquid solvent.
Answer:
separate soluble solids from liquid
Explanation:
A in Chemistry
Crystallization is a separation technique used to separate solute solids from a liquid solvent.
What is Crystallization?Crystallization is the process of disuniting or separating two substances or molecules that are mixed, and are of different forms of matter. Such as solid and liquid. The process separates mixtures by three processes. These processes are freezing, precipitation, and deposition.
It is the main process of separating solid from liquid. In this process, the solute came above the liquid in crystal form and this is called precipitation.
Freezing separates the substance that has a different freezing point. By deposition, the substance that is solid and called solute is deposited below the liquid in the container.
Thus, crystallization separates the solute solids from a liquid solvent.
To learn more about Crystallization, refer to the link:
https://brainly.com/question/17053072
#SPJ2
Can someone please help
Answer:
3
Explanation:
3 ampers (it says in the problem)
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.
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
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
Compare and contrast Transverse Waves and Longitudinal Wave
there, so you can have choices, though they all mean the same thing.
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 (-)
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
write the molecular fotmula of water
Answer:
H20
Explanation:
Answer:
hope it helped you
Explanation:
H2O (u have to write ✍️no 2 below H.
Apps
What do you already know about mass, weight, and gravity?
Answer:
they are the three states of matter
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.
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
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
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
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
A car travels at 35.0 mi/hr. How far has it gone in 2455 seconds?
Answer:
The answer is 23.8 milesExplanation:
The distance covered by an object given it's velocity and time taken can be found by using the formula
distance = velocity × timeFrom the question
velocity = 35.0 mi/hr
time = 2455 s = 0.68 hr
We have
distance = 35 × 0.68
We have the final answer as
23.8 milesHope this helps you
Calculate the entropy change when 4.31 g of H2 reacts with O2 according to the reaction
2 H2(g) + O2(g) → 2 H2O(l)
at 298 K and 1 atm pressure. The standard molar enthalpy of formation of H2O(l) at 298 K is −285.8 kJ/mol. The corresponding free energy of formation is −237.2 kJ/mol.
Answer in units of J/K.
Answer:
Explanation:
ΔG = Δ H - T ΔS
Given , ΔG = -237.2 kJ / mol
Δ H = - 285.8 kJ / mol
T = 298
Putting the values in the equation
-237.2 = - 285.8 - 298 x ΔS
ΔS = .163 kJ / mole K
moles of water formed = 4.31 / 2 = 2.155
entropy change required = 2.155 x .163 kJ / K
= 351.26 J / K .
how many molecules are in 3.40L of H2O vapor at STP?*
Answer:
9.14 x 10^22 molecules
Explanation:
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.
Convert 0.0134 Liter to millimeter
Answer:
13400 millimeters.
Explanation:
Multiply the volume value by 1e+6
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
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What volume of O2 would be required to react with 4.6 grams of Na
Volume of O₂ = 1.12 L
Further explanationThe reaction equation is the chemical formula of reagents and product substances
A reaction coefficient is a number in the chemical formula of a substance involved in the reaction equation. The reaction coefficient is useful for equalizing reagents and products
Reaction
4Na+O₂ ⇒ 2Na₂O
Ar Na = 23 g/mol
mol Na :[tex]\tt mol=\dfrac{4.6}{23}=0.2[/tex]
mol O₂ :[tex]\tt \dfrac{1}{4}\times 0.2=0.05[/tex]
Assume at STP (0 C, 1 atm), 22.4 L for 1 mol , then volume of O₂ :
[tex]\tt 0.05\times 22.4=1.12~L[/tex]
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