The two methods of determining pH values, pH indicator versus pH meter,, should show similar pH values for those solutions. However, there are some differences between the two methods. Here's what's different:The pH meter measures the electrical potential difference between the reference electrode and the sensing electrode of the device.
It offers a more accurate reading of the pH value. pH meters are used to measure a wide variety of samples, such as groundwater, drinking water, wastewater, and other solutions that have pH values outside of the range that pH paper can measure.
PH indicator paper, on the other hand, is an easy-to-use and inexpensive method for determining pH. They work on the principle of visual color changes, which are brought about by the presence of hydrogen ions (H+) or hydroxyl ions (OH-). pH paper can be used to measure pH values in various industries, including food production, scientific research, medical diagnosis, and wastewater treatment facilities. pH paper is ideal for low-volume and small-scale pH measurements.
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If an element’s atomic number is 15, how many electrons must it have in order to be neutral?
Answer:
15
Explanation:
atomic number is the same as protons so 15 protons and 15 electrons would be neutral
who discovered silver and how?
Answer:
Silver was discovered in Greece
Answer:
En 1516 Juan Díaz de Solís descubrió en Sudamérica el mar Dulce que posteriormente Sebastián Caboto denominó Río de la Plata, creyendo que allí abundaba el precioso metal, y de donde tomará el nombre la Argentina.
Explanation:
A cube is 4 cm on each side. What is its volume?
Answer: 64cm^3
Answer:
yeah
Explanation:
Does Arsenic have a high or low ionization energy in comparison to Carbon? Explain why using the concepts of the structure of the atom
Find the number of moles of 452 g of Iodine.
Answer:
3.5617342714563267
Explanation:
How many nitrogen atoms are in the chemical formula below? C8H10(N4O2)2
Answer:
8 Nitrogen atoms
Explanation:
Step 1: Define
Chemical Formula - C₈H₁₀(N₄O₂)₂
Step 2: Multiply
(N₄)₂ = N₈
If you go from the Earth to the Moon, will your MASS change?
Answer:
No matter if you are on Earth, the moon or just chilling in space, your mass does not change. But your weight depends on the gravity force; you would weigh less on the moon than on Earth, and in space you would weigh almost nothing at all.
Answer:
Your mass doesn't change on other planets, but the gravity and size of those planets affect how much you weigh. So, your weight depends upon the gravity of the planet and your weight keeps changing based on planet gravity. Mass is both a property of a physical body and a measure of its resistance to acceleration when a net force is applied. An object's mass also determines the strength of its gravitational attraction to other bodies.
Explanation:
I am smart...Calibri is the superior font and green is the superior highlighter.
how many moles of water are in 0.340 g of water?
Answer: 0.018 recurring?
Explanation:
moles = mass/mr
H20 = 2 + 16 = 18
0.340/18 = 0.018
A car emits 8.6 kg of CO2 per gallon of unleaded gas. How much CO2 is produced if the car 2.5 burns gal of fuel?
Answer:
2.5 gallon fuel produced 21.5 kg CO₂.
Explanation:
Given data:
CO₂ produced during burning of one gallon fuel = 8.6 kg
CO₂ produced during burning of 2.5 gallon fuel = ?
Solution:
This problem is solved through simple multiplication.
If one gallon fuel produced 8.6 kg CO₂ then 2.5 gallon produced is determined by multiplying the 2.5 with 8.6 kg.
1 gallon = 8.6 kg CO₂
2.5 × 8.6 kg CO₂ = 21.5 kg
Thus 2.5 gallon fuel produced 21.5 kg CO₂ .
are milliseconds or kilo seconds larger?
Answer:
kilo seconds
Explanation:
kilo prefix means it is large and . milli as small
Explain how the type of an atom is defined?
How the type of an atom is defined is
An Atom is defined by how many Protons and Neutrons in its nucleus and electrons in its energy levels
From the question we are told that
How the type of an atom is defined
Generally
It is important to note that atoms are defined strictly by its Embodiment which are its electron protons and Neutrons
An Atom is defined by how many Protons and Neutrons in its nucleus and electrons in its energy levels
Therefore
An Atom is defined by how many Protons and Neutrons in its nucleus and electrons in its energy levels
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when a person strikes a match, potential energy in the match is transformed into which types of energy?
Answer:
the answer is thermal and radiant
Select all answers that are correct.
George Washington Carver received _____ from God during early morning walks in the woods.
guidance
inspiration
finances
solutions
Answer:
inspiration
Explanation:
During the SI Scavenger Hunt Lab, a student measured her foot length using a meter stick and recorded it as 25 cm. However, at the shoe store, the sales staff measured the length of her foot to be 23.7 cm. If the shoe store’s measurement is accepted as correct, what is the percent error of her meter stick measurement?
Answer:
Percent error in meter stick measurement is 5.5%.
Explanation:
Given data:
Measured value = 25 cm
Accepted value = 23.7 cm
percent error = ?
Solution:
Subtract the accepted value from measured value divided by accepted value multiply by 100.
Formula:
(measured value - accepted value / accepted value ) × 100
Now we will put the values.
(25 cm - 23.7 cm/23.7 cm ) × 100
1.3 cm/23.7 cm ) × 100
0.055× 100
5.5%
Percent error in meter stick measurement is 5.5%.
Which of the following best describes the interaction of matter in a suspension?
A.. Particles are spread out, taking on the appearance of a homogenous mixture.
B.. Particles are too big to dissolve in the solution.
C..The particles of a solid dissolve in a liquid.
D.. Particles are chemically combined to form a new substance.
After hearing the siren, the student runs into her house and tells her mother there must have been an accident down the street.
She just made a(n).
A inference
B hypothesis
C observation
D prediction
Answer:
A
Explanation:
she inferred that was the end result.
which of the following statement best describes metamorphosis
Answer:
Process of rock formations
Explanation:
which of the following models of the atom was supported by the gold experiment?
two substances react and the mass is recorded.The mass of the products does not equal the mass of the reactants .Which is the best explaination for the different masses?
define relative velocity with an example
Answer:
For example, you are in a bus and it goes with the velocity of 50 m/s to the east, then a truck passes you with a velocity of 60m/s to the east. ... Velocity of the moving objects with respect to other moving or stationary object is called “relative velocity” and this motion is called “relative motion”
ctto.
What is the temperature of the Sun's middle most layer the chromosphere ?
It’s temperature is 5,500 degrees celsius to 6,000 degrees celsius.
It’s temperature is 6,000 degrees celsius to 20,000 degrees celsius.
It’s temperature is 20,000 degrees celsius to 2,000,000 degrees celsius.
It’s temperature is 2,000,000 degrees celsius to 3,000,000 degrees celsius.
Answer:
It's temperature is 6,000 degrees celsius to 20,000 degrees celsius.
Explanation:
Answer:
It's temperature is 6,000 degrees Celsius to 20,000 degrees Celsius
Explanation:
3. How many meters long is a 360 inches long extension cord?
Answer:
9.144 meters.
Explanation: Formula: divide the length value by 39.37 , which yields 9.144.
The element aluminum has an atomic number of 13.
How many protons are in the nucleus of an aluminum atom?
How many electrons does an aluminun atom have?
Answer:
Aluminum has (by definition) 13 protons, 13 positively charged particles. Because aluminum is neutral (as is all matter), it therefore has 13 negatively charged particles, electrons
Which explains one reason evaporation can be used to separate a mixture?
The desired component has a higher boiling point than the other components.
The desired component has a different density from the other components.
The mixture is a solution that contains a substance that will crystallize out.
The desired component has the smallest particles in the mixture.
Answer:
its the first one
Explanation:
if only one mixture boils the other will stay as the boiling one will evaporate
Answer:
The answer would be
A. The desired component has a higher boiling point than the other components.
Explanation:
Credits to the person above
Have a great day
What action-reaction forces are involved when a rocket engine fires?
The reaction force is the hot gas pushing back on the rocket propelling it into outer space. There is no need for air to push on because the hot gases produced by the rocket allow the action and reaction forces to operate.
(hope this helps ^^)
In which of the following states of matter are the particles very far apart and
move freely?
O solids only
O solids and liquids only
O solids, liquids, and gases
O gases only
Answer:
Gas
Explanation:
In a gas, particles are in consistent straight-line movement. The motor energy of the atom is more prominent than the alluring power between them, hence they are a lot farther separated and move unreservedly of one another.
Answer: Gases only
Explanation: because there are gas all around us. You can walk though the air with slamming into it like its a brick wall. that's because the particles are far apart allowing it to move freely.
Hopefully this helps.
Two samples of matter differ in temperature by 20°C. What is the difference in temperature of these two samples using the Kelvin scale?
The difference is .......... kelvin
Hiii
Help me pls.
Answer:
The difference is 293.15 Kelvin.
Explanation:
Given data:
Temperature difference of matter = 20°C
Temperature difference of matter in kelvin = ?
Solution;
Formula:
0°C +273.15
now we will put the values instead of 0.
20°C + 273.15 = 293.15 K
Thus, the temperature difference between two sample is 293.15 K.
1.) Decide if the following equation is always true, sometimes true, or never true.
2(x + 3)=5x + 6 - 3x
A) Always True
B) Sometimes True
C) Never true
Decide if the following equation is always true, sometime true, or never true.
2.) x - 3=2x - 3 - x
A) Always True
B) Sometimes True
C) Never True
PLEASE HELP!!!!!!
Explanation:
(1) The given equation is :
2(x + 3)=5x + 6 - 3x
Solving LHS first.
2(x + 3) = 2x +6
Solving RHS
5x + 6 - 3x = 2x+6
LHS = RHS
So, it is always true.
(2) The given equation is :
x - 3=2x - 3 - x
LHS = x - 3
Solving RHS
2x - 3 - x = x-3
LHS = RHS
So, it is always true.
Does a chemical reaction in a closed or open best supports the law of conservation of matter
Answer:
Normally, it explains that matter cannot be created or destroyed. It demonstrates different chemical reactions that help show the different transformations of the matter but will never destroy it or create it.
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A truckload of plastic soda bottles was finely shredded at a recycling center. The plastic shreds were placed into 55-liter drums. What it the mass of the plastic shreds inside one of the drums in kg? Assume lowest density within the range.
Answer:
75,900 g
Explanation:
m=d×v
(1.38g/cm^3) × (55,000)
