Which of the following is NOT a homogeneous mixture? *
koolaid
soda
tea
water
Answer:
water
Explanation:
Because it does not have more than one component.
The science of life or living matter in all it’s forms and phenomena? What’s it’s vocab answer?
Answer:
Biology
Explanation:
Find the average atomic mass for Cl if 75.78% of Cl atoms are Cl-35 with a mass of 34.96885271 u and 24.22% are Cl-37 with a mass of 36.96590260 u.
Answer:
35.45253819
Explanation:
(0.7578*34.96....)+(0.2422*36.96...)
Relative and average atomic mass both describe properties of an element related to its different isotopes. Out of these two Relative atomic mas is more accurate. The average atomic mass of Chlorine is 35.45g.
What is mass?Mass defines the quantity of a substance. It is measured in gram or kilogram. Average mass is the mass of atoms of an element that are isotopes. It can be calculated by multiplying mass of a isotope to natural abundance of that isotope.
Average atomic mass = (mass of first isotope× percent abundance of first isotope)+(mass of second isotope× percent abundance of second isotope)
Substituting the given values
Average atomic mass=(0.7578×34.96....)+(0.2422×36.96...)
Average atomic mass=35.45g
Therefore, the average atomic mass is 35.45g.
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Lisa's Chemistry class was performing an experiment with gas pressures. They filled a container with gas at a pressure of 101,000 Pa at room temperature. When they doubled the temperature, the pressure also doubled. What was the new pressure in scientific notation?
Answer:
2.02 × 10^5 Pa
Explanation:
According to this question, in an experiment, a container was filled with gas at pressure of 101,000 Pa, at room temperature. When this temperature was doubled, the pressure also increased by two times i.e.
The pressure changed to (101,000 Pa × 2) = 202,000 Pa
This question is asking to represent this in scientific notation. Scientific notation aims at representing a small or too large number in an easy way. It is done by making use of power of ten i.e. a × 10^b
Where; a = decimal number
b = power of ten
In the case of a large number like 202,000, the power of ten is derived by counting the decimal place backwards. If we are to count until we stop in front of the last digit, we will have 5 times.
That is; 2.02000 × 10^5
We can remove every trailing zeros
Hence, the answer is 2.02 × 10^5 Pa.
Which two terms? i will mark brainlist
Answer:
I believe it's qualitative and continuous.
Explanation:
Answer:
Continuous, and Quantitative
Hope this helps :)
What phase of matter would the above substance be at 500⁰C?
Answer:
Is 4 an answer? If so, that is correct
Explanation:
Which term names the longest geologic time frame?
Answer:
Precambrian
Explanation:
Answer:
An Eon
Explanation:
epcohs are the shortest geologic time frame, which make up periods, that make up eras, that make up eons.
A chemist prepares a solution of sodium carbonate by measuring out of sodium carbonate into a volumetric flask and filling the flask to the mark with water. Calculate the concentration in of the chemist's sodium carbonate solution. Be sure your answer has the correct number of significant digits.
Answer:
The correct answer will be "[tex]9.45\times 10^{-5} \ mol/L[/tex]".
Explanation:
We have:
Moles of solute (Na₂Co₃) = [tex]18.9 \mu \ mol[/tex]
= [tex]18.9\times 10^{-6}[/tex]
[tex]1 \mu \ mol[/tex] = [tex]10^{-6} \ mol[/tex]
Now,
The volume of the solution will be:
⇒ [tex]0.200 \ L[/tex]
∴ [tex]{1 \ mL=0.001 \ L}[/tex]
The formula to find the concentration will be:
⇒ [tex]Concentration = \frac{moles \ of \ solute \ (mol)}{Volume \ of \ solution \ (L)}[/tex]
On substituting the given values, we get
⇒ [tex]=\frac{18.9\times 10^{-6}}{0.200}[/tex]
⇒ [tex]=9.45\times 10^{-5} \ mol/L[/tex]
NEED HELP ASAP
Select all the correct answers.
Which of these are examples of mixing and separating?
removing seed casings from grains
a soda bottle bubbling when it is opened
a bright copper statue turning green from weathering
removing salt from seawater
water decomposing to oxygen and hydrogen
Answer:
the answer is
removing seed casings from grains
removing salt from seawater
Explanation:
This question is regarding mixing and separating such as a physical change.
a soda bottle bubbling is a chemical reaction
copper statue is a chemical reaction
water decomposing to oxygen and hydrogen is also a chemical reaction
this question is talking about mixing and seperating as a physical change
if the density of a bar of gold is 19.3g/cm^3and you cut it into four pieces , what is its density of each piece of gold
Considering the definition of density and intensive and extensive properties, the density of each piece of gold is 19.3 [tex]\frac{g}{cm^{3} }[/tex]
Density is defined as the property that matter, whether solid, liquid or gas, has to compress into a given space. In other words, density is a quantity that allows us to measure the amount of mass in a certain volume of a substance.
Intensive properties are those that will remain unchanged even though the amount of matter varies, while extensive properties vary depending on the amount of matter in a body.
Density is an intensive property, so it is independent of the sample size. This is because the solute will be present in a certain proportion with respect to the solvent. That ratio will not change unless more solute or more solvent is added. Consequently, the concentration remains constant (concentration is an intensive property) and density too.
Finally, the density of each piece of gold is 19.3 [tex]\frac{g}{cm^{3} }[/tex]
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The invention of the microscope allowed scientists to see and study cells. True or false
Answer:
True
Explanation:
i have a question, what does a man have to do to get the love of his life.
A man have to get their friend bond with someone they like a lot closer. Then, if the man is ready to confess his feeling, try buying his love of his life their favorite flower or favorite candy/food.
hope this help-(even though im a girl ;v;)
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:
Which of the following represent a chemical compound? a. Cr b. CO c. Au d. Mg
What is Ammonium bisulfate as a chemical formula?
Answer:
Ammonium bisulfate/Formula
(NH4)HSO4
Reason to answer:
Mark me brainliest
13. Identify the state(s) of matter described by each statement.
a. has a definite volume
b. has a definite shape
c. completely fills any container
d. flows
e. is made of particles held together in a rigid structure
f. is made of particles that are close together
Answer:
A: solid and liquid
B: solid
C: gas
D: liquid and gas
E: solid
F: solid
What is a Hypothesis?
Answer:
A hypothesis is a claim you make about what you think is going to happen in an experiment.
Hope This Helps
<3
Which of the following is a measure of the amount of matter than object contained.
Weight
Mass
Volume
density
Answer:
weight = newton
mass = kilogram
volume = cubic meter
density = kilogram per cubic meter
Answer:
weight hghhiixjdhdhbdnfnfjfjjcndndnfmckkxkx
When we discuss communication, we often first think of written and oral communication. Write one paragraph about a time when you found it easier to communicate with a graph than with text.
Answer:
There's a lot of answers.
Explanation:
Last year, I presented a paper on population growth in the United States between the years 1975 and 2015. The data involved numbers and figures. This data was difficult to present in textual format, so I turned to graphing. The graph helped me break down and simplify complex numerical data so my audience could more easily understand it.
A time when I found it easier to communicate with a graph than with text was when I wanted to make a presentation about the importance of education.
Communication simply means sending a message from one person to another person. Graphs can be used when one wants to make a visual representation of data.
I used graphs when I wanted to make a presentation about the importance of education. I wanted to show the audience how certain regions like the European countries are well developed than African countries. The graph was vital in visualizing this.
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true or false forming a hypothesis is the first strip of the scientific method
Answer:
True (probably)
Explanation:
I think it's true since creating hypothesis is the start of almost every scientific activities that we usually know. Please correct me if I'm wrong.
Which of the following substances has the highest melting point?
a. pentane b. nonane c. ethane d. butane
Nonane (b) has the highest melting point.
-----------------------------
A caveat: I'm assuming that we're dealing with the straight-chain isomers of these alkanes (specifically pentane and nonane). The straight-chain isomer of pentane (n-pentane, CH3-[CH2]3-CH3) has a melting point of -129.8 °C; the straight-chain isomer of nonane (n-nonane, CH3-[CH2]7-CH3) has a melting point of -53.5 °C. The pattern holds as you go down (or up): The more carbon atoms, the higher the melting point. So, in decreasing order of melting points here, you'd have the following: nonane > pentane > butane > ethane.
However, one structural isomer of pentane, neopentane, has a melting point of -16.4 °C, which is higher that the melting point of n-nonane despite neopentane having the same molecular formula as its straight-chain isomer. Of course, you're not to blame for coming up with this question; this is just some extra info to keep in mind.
True/False (A= True & B =False) 46. Blood is a tissue. 47. Elastic cartilage is found in the ears, nose, epiglottis and larynx. 48. If you have a neoplasm you hope it is benign. 49. All cancers are neoplasms but not all neoplasms are cancer. 50. Plasma cells produce Histamine 51. The liver is one organ that can partially regenerate because it is made of epithelial cells 52. Keratin is a waterproofing protein found in epithelial cells
Answer:
46.A 47.B 48.B 49.A.50.A.51.B.52.B
The answer of the questions serially is true, false,false ,true,true,false and false where blood is a tissue which circulated by the pumping organ that is heart.
What is heart?
Heart is a muscular organ which is present in most of the animals , it is responsible for pumping blood via the blood vessels to the entire body.The blood which is pumped carries oxygen and nutrients along with it.Along with it on it's way back to heart it carries carbon dioxide to the lungs.
Heart has an approximate size of a closed fist and is present between the lungs in the middle compartment of the chest. It is divided in to for chambers , the upper chambers called atria and lower ones called ventricles.
The wall of the heart is made up of three layers : epicardium,myocardium and endocardium. It pumps blood with a rhythm which is determined by a group of cells which are called the pacemaker cells present in the sinoatrial node.
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all smart people i need help
Answer:
its b
Explanation:
Answer: the first box
Explanation:
The electron configuration for aluminum (Al) is shown below:
1s22s22p63s23p1
Which diagram shows the correct distribution of electrons in the electron shells of an aluminum atom?
A small orange dot is surrounded by 5 concentric circles. The inner ring has green dots at the north and south positions. The second ring has green dots at east and west. The third ring has six dots, at the north, northeast, southeast, south, southwest, and northwest. The fourth ring has dots at the north and south, and the outer ring has one dot at the west position.
A small orange dot is surrounded by two concentric circles. The inner circle has 6 green dots spaced approximately evenly across the circle. The outer circle has 7 dots, also approximately evenly spaced; none are aligned with dots in the inner circle.
An orange dot has 3 concentric circles surrounding it. The innermost circle has green dots at the north and south positions. The center circle has 8 dots spaced unevenly. The outer circle has three dots, spaced so that two are closer to each other than either is to the third.
An orange dot is surrounded by a concentric circle. 13 closely spaced green dots lie on that outer circle.
Answer:
It is the third choice
Explanation:
Just did assignment
Answer:
It's C
Explanation:
what is the mass number? plz help!
Answer:
I believe it is 2?
Explanation:
;v;
Which picture shows an example of kinetic energy?
Answer:
the cheta
Explanation:
kinetic means movement
45.761 g - 42.98 = ___________
I believe your answer would be
2.781
Which element below has atoms with only two valence electrons?
Potassium
Sulfur
Magnesium
Neon
Periodic trends
PLEASE HELP ME OUTT!! I WILL GIVE BRAINLIEST!
Answer:
A. Ba
C. Cu
D. H
Explanation:
HOPE THIS HELPS
Fill in the blank. An answer would be great right now!!! I’m having trouble with science. thanks!!
Answer:
1. Richter 2. Moment
Hope this helps !!
