Jose’s lab partner gives him a solution of sodium phosphate that is buffered to a ph 4. Because of an error that he made while calibrating the ph meter, Jose’s measurements of the ph of the sodium phosphate solution are 5.4,5.4, and 5.4
Which statement best describes his results
A they are accurate but not precise
B they are precise but not accurate
C they are both precise and accurate
D they are neither precise or accurate

Answer:

H2

Explanation:

on edge

Answer:

the answer is 18 atoms [your welcome]

Given :

Chlorine's 3p sub level has 5 electrons in it.

To Find :

How many electron(s) more in the 3p sub-level to make it stable.

Solution :

Electronic configuration of Chlorine is :

[Ne] 3s² 3p⁵.

We know, p-orbit is stable with 6 electronic.

Therefore, to stable p-orbit 1 more electron is required in 3p sub-level.

Hence, this is the required solution.

Answer:

104.969 amu.

Explanation:

From the question given above, the following data were obtained:

Isotope A:

Mass of A = 107.977 amu

Abundance (A%) = 0.1620%

Isotope B:

Mass of B = 106.976 amu

Abundance (B%) = 1.568%

Isotope C:

Mass of C = 105.974 amu

Abundance (C%) = 47.14%

Isotope D:

Mass of D = 103.973 amu

Abundance (D%) = 51.13%

Average atomic mass =?

The average atomic mass of the element can be obtained as follow:

Average atomic mass = [(Mass of A × A%) /100] + [(Mass of B × B%) /100] + [(Mass of C × C%) /100] + [(Mass of D × D%) /100]

Average atomic mass = [(107.977 × 0.1620)/100] + [(106.976 × 1.568)/100] + [(105.974 × 47.14)/100] + [(103.973 × 51.13)/100]

= 0.175 + 1.677 + 49.956 + 53.161

= 104.969 amu

Therefore, the average atomic mass of the element is 104.969 amu.

Answer:

if an object weighs more than an equal volume of water, it is more dense and will sink, and if it weighs less than an equal volume of water, it is less dense and will float.

Explanation:

Hope that helps

Answer:

Of the solution, 30g of it is sugar.

Explanation:

15% = 0.15

200 * 0.15 = 30

Best of Luck!

Explanation:

Color. The changing of color of a substance is not necessarily an indicator of a chemical change. For example, changing the color of a metal does not change its physical properties. However, in a chemical reaction, a color change is usually an indicator that a reaction is occurring.

Answer:

Difference between a heterogeneous mixture and a solution ( homogenous mixture) is that a homogenous mixture has uniform composition throughout the mixture, whereas heterogeneous mixture has varying composition throughout the mixture.

Answer:

Phenotype is the term used in genetics for the composite observable characteristics or traits of an organism. The term covers the organism's morphology or physical form and structure, its developmental processes, its biochemical and physiological properties, its behavior, and the products of behavior.

Explanation:

I HOPE IT HELPED

Answer:

Explanation:

Just for future reference here's an easy way to remember it PHenotype is the PHysical characteristics

and here's the actual definition: the set of observable characteristics of an individual resulting from the interaction of its genotype with the environment.

Explanation:

Copper does not react with HCl to give H2 gas.

Answer:

Nuclear reactions involve a change in an atom's nucleus, usually producing a different element. Chemical reactions, on the other hand, involve only a rearrangement of electrons and do not involve changes in the nuclei.

Answer:

the answer is C

Explanation:

Answer:

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Polar molecules occur when there is an electronegativity difference between the bonded atoms. Nonpolar molecules occur when electrons are shared equal between atoms of a diatomic molecule or when polar bonds in a larger molecule cancel each other out.

Explanation:

hope it helps u mate

Answer:

b. the mass of an electron.

Explanation:

Answer:

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Because water is polar and oil is nonpolar, their molecules are not attracted to each other. ... Because water molecules are polar, they interact with the sodium and chloride ions. In general, polar solvents dissolve polar solutes, and nonpolar solvents dissolve nonpolar solutes.

Explanation:

hope i helps u

Answer: hope it helps

no you would not be able see the rock in the room because if you close the lights its going to be dark unless you have a glow in the dark light.

Explanation:

Answer:

B

Explanation:

Graphs are tools that help in performing calculations as they reduce the source of errors which is done in long mathematical calculations.

Errors in chemical analysis result when there is a difference between observed value and the true value.If the magnitude of errors is large , it results in decrease in accuracy, reproducibility, and precision.

There are three types of errors:1) random error 2) systematic error 3) human error.The cause of random errors are difficult to quantify while the human errors can be minimized by taking a range of readings to reduce the error.

Errors while measuring boiling point may be human errors while noting down the boiling temperature or instrumental or systematic error if there is a fault in the thermometer.

Learn more about errors,here:

https://brainly.com/question/15810279

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Answer:

the first answer is correct don't forget you can use quizzlet app to

Since hardness measurement involves only surface of the material, bulk density of the material does not have any explicit relation with the hardness. Materials are usually subjected to microstructural and/or chemical changes in the surface by carbiding, nitriding and other processes, many times by cold working.

The structure of the surface of the material is almost always different from the structure inside the bulk, it would be a very complicated and complex relationship, if anyone ever tries to establish it and may not prove that beneficial also

Answer:

Those in lightning are charged and those in water are not charged.

Explanation:

The particles in lightning differs from those in a water in that water molecules are neutral and those of lightning are charged.

Lightning is made up of charged ions or particles that have either lost or gained electrons.

Lightning is produced as a burst or discharge of charged particles that are imbalanced withing the clouds.

Water molecules are made up of hydrogen and oxygen atoms which forms molecules held together by strong intermolecular and interatomic bonds.

Due to the sharing of electrons that has made this bonding possible, there is a net charge balance which leads to a neutrality.

Water is electrostatically neutral and not charged.

Answer:

Those in lightning are charged and those in water are not charged. Hope this helps! Brainliest plz! If you want :)

Explanation:

Answer:

It's denser

Explanation:

When something is denser than another substance, it sinks into the substance.

Answer:heart

Explanation:

Answer:

A dense substance that is hard and in compressible

Explanation:

I just took the unit review on edge

Answer:

B

Explanation:

For Edge:)

Answer: D.) Carbon

Explanation: Carbon is an organic compound, any of a large class of chemical compounds in which one or more atoms of carbon are contently linked to atoms of other elements, most commonly hydrogen, oxygen, or nitrogen.

Answer: generic material and protein coat. Have a great day

Explanation:

Answer:

The temperature will drop 4°C.

Explanation:

Note that this question is describing temperature change in response to the time of the day. Ideally, mornings to afternoons are usually hotter while evenings are colder.

According to this question, the temperature rises by 4°C from 10:00 a.m. to 12:00 p.m. it also rises another 3°C from 2:00 p.m. to 4:00 p.m but starts dropping by 2°C from 2:00pm to 4:00pm. This shows that between the hours of 10:00am - 2:00pm, the temperature increases as a result of the heat from sun. However, towards the evening period, the temperature reduces because the sun is getting shadowed by the moon.

Hence, based on this analogy, the most reasonable prediction about how the temperature will change from. 4:00am to 6:00am is that The temperature will drop 4°C.

The best discription of a computer virus is that it is a program that can damage a computer.

A computer virus is a sort of computer software that repeats itself by altering other computer programs and injecting its own code when it is run.

So it is a type of program which can damage a computer.

Hence virus is a program that can damage a computer.

To know more about computer virus, visit the below link:

https://brainly.com/question/20407534

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Answer: It's A: a program that can damage a computer

Explanation:

Answer:

Thermal energy is transferred from the cup to the cold water until they are at the same temperature

Explanation:

The second law of thermodynamics states that the entropy of an isolated system can only remain constant or increase, and  will have a decreased potential energy than its initial state and also indicating that heat, or thermal energy, can only spontaneously flow from a hotter body to a colder body so as to attain thermal equilibrium

Therefore since the cup and the water form a thermodynamic system, with water being the colder body and the cup being the relatively hotter body, thermal energy can only be transferred from the cup to the cold water until they both reach thermal equilibrium or until they are at the same temperature.

Answer:

The answer is

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

From the question

volume = 225 mL

density = 3.2 g/mL

The mass is

mass = 3.2 × 225

We have the final answer as

Hope this helps you