Answer:
a list of characteristics that can be used to identify a substance include color, odor, taste, density, melting point, boiling point, conductivity, and hardness.
Answer:
physical or chemical
Explanation:
A physical property is a characteristic of a substance that can be observed or measured without changing the identity of the substance while a chemical property describes the ability of a substance to undergo a specific chemical change.
If an atom contains one electron and one proton will it carry any charge or not?
Answer:
That atom will not contain any charge because one negative charge of single electron and one positive charge of single proton are neutralized by each other.
Which of the following DOES NOT belong to the group?
A.eyes
B.mouth
C.large intestine
D.stomach
Answer:
eyes
Explanation:
It is because the mouth, large intestine and stomach comes in the digestive system abd eyes doesn't.
HOPE THIS HELPS
it is also called solution
Explanation:
In chemistry, a solution is a special type of homogeneous mixture composed of two or more substances. In such a mixture, a solute is a substance dissolved in another substance, known as a solvent. ... The term "aqueous solution" is used when one of the solvents is water.
Which of the following best describes the distribution of the world’s food supply? Select all that apply.
Still unevenly distributed leaving millions starving to death.
Quickly changing to be evenly distribute based on humanitarian efforts.
Slowly changing to be slightly more evenly distributed based on humanitarian efforts.
Evenly distributed throughout the population of the world now.
Answer: It would be A and C
Explanation: I did the test and got it right. Hope this helps!
Answer:
A + C
Explanation:
ur an amazing person have a great day :3
quote for today : ~dont trust anyone to much remeber the devil was once angle
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Answer:
a
Explanation:
If N and O were to bond, the difference in electronegativity would be
and we would expect the bond to be
ionic, covalent)
Answer:
The bonds between nitrogen and oxygen are covalent bonds made from sharing electron pairs. The electronegativity of oxygen is 3.5.
What do you call a rock that cooled rapidly outside a
volcano?
Explanation:
intrusive rocks.....
.
Antarctica is a frozen land so cold and I see no changes in Wheeler scientist have discovered fossils
Answer:
The correct answer is - due to the movement of plates it is relocated.
Explanation:
Antarctica is a very cold part of the earth, it is so cold that there is no growth of trees or such vegetation. Even though there are no or less vegetation scientists found fossils of the trees.
It is relocated from the north where the conditions were warmer and easy for tree growth. It is then moved due to plate movements to the south pole. This is the reason behind the fossils scientist found.
You want to compile a list of properties of a substance , but you don't have a way to measure mass it volume. What kinds of properties can you determine without knowing the amount of matter in the sample?
Explanation:
I Would Determine Mass,Volume And Weight
PLZ HELP SCHOOL STARTS TMR AND I NEED THIS DONE BY 2NIGHT. ILL GIVE BRAINLIEST
Answer:
Filtration separates solids of different sizes.
Distillation takes advantage of differences in boiling points.
Evaporation removes a liquid from a solution to leave a solid material.
when a substance like sugar dissolves in water, the particles intermingle. This is possible because the particles of sugar
a)have spaces between them
b)have strong attractions to eachother
c)are pure
d)are vaporized
Answer:
A
Explanation:
32. A sample of potassium is composed of 23% K-39, 48% K-40 and the remainder K-41. Calculate the average mass
of the sample.
Answer:
40.06 amu.
Explanation:
From the question given above, the following data were obtained:
Isotope A (K-39)
Mass of A = 39 amu
Abundance of A = 23%
Isotope B (K-40)
Mass of B = 40 amu
Abundance of B = 48%
Isotope C (K-41)
Mass of C = 41 amu
Abundance of C = 100 – (23 + 48)
Abundance of C = 100 – 71
Abundance of C = 29%
Average mass =?
Average mass = [(Mass of A × A%)/100] + [(Mass of B × B%)/100] + [(Mass of C × C%)/100]
= [(39 × 23)/100] + [(40 × 48)/100] + [(41 × 29)/100]
= 8.97 + 19.2 + 11.89
= 40.06 amu
Thus, the average mass of potassium is 40.06 amu
What does 10% humidity in a weather report indicate?
A)the level of humidity is high.
B)the level of humidity is low.
C)the level of humidity is moderate.
D)the air can not hold anymore water.
Answer:
B
the humidity is the % of water in the air and it is out of 100% of the air. so 10/100 is low
Answer:
B
Explanation:
30%-50% is considered moderate. Anything below 30% is considered dry, anything above 50% is considered high. I hope this helps!
earth is one of the planets in the
Answer:
moon obviously
Explanation:
........
q=The+diagram+below+represents+the+building+block+of+a+DNA+molecule+which+is+a+type&rlz=1CATPIA_enUS942&sxsrf=ALeKk02q0TrtMmY64OTcRfnI6UtHtyfVwg:1614616724451&source=lnms&tbm=isch&sa=X&ved=2ahUKEwi2l7yCxI_vAhVjg-AKHXaSCVcQ_AUoAXoECBIQAw&biw=1517&bih=726#imgrc=YTAoiVTgM8UvnM
Answer:
we need to see the diagram
Explanation:
What chemicals must be cycled through a Martian environment in order for the planet to be habitable for life? Describe how scientists intend to make those resources available in such a harsh environment.
The surface currents of Earth’s oceans are most likely created by which of the following?
Answer:
global wind patterns. the rotation of the Earth. the shape of the ocean basins.
Explanation:
Metion two common types of flames and conditions under which each is produced
Answer:
natural flame,oxidising flame
What causes rocks to change and form into new types of rocks?
Answer:
The three main rock types are igneous, metamorphic and sedimentary. The three processes that change one rock to another are crystallization, metamorphism, and erosion and sedimentation. Any rock can transform into any other rock by passing through one or more of these processes. This creates the rock cycle.
Select the correct answer.
Beryllium (Be) and fluorine (F) combine to make the compound BeF2. What is the chemical name for this compound?
A.
beryllium fluoride
B.
beryllium fluorine
C.
beryllide fluoride
D.
beryllide fluorine
Answer:
A number is right I think
Answer:
A.
beryllium fluoride
I hope it is helpful...
Which of the following pairs of elements will form covalent bonds with each other? PLEASE HELP
The pair of elements which will form covalent bonds with each other are Si (Silicon) and N (Nitrogen). Hence the correct option is (B).
What is Covalent Bond ?
A covalent bond is a chemical bond that involves the sharing of electrons to form electron pairs between atoms.
These electron pairs are known as shared pairs or bonding pairs, and the stable balance of attractive and repulsive forces between atoms, when they share electrons, is known as covalent bonding.
Silicon and nitrogen forms strong covalent bond . This stable covalently bonded material does not readily sinter and cannot be heated over 1850⁰C as it dissociates into silicon and nitrogen.
Therefore, The pair of elements which will form covalent bonds with each other are Si (Silicon) and N (Nitrogen). Hence the correct option is (B).
Learn more about Covalent Bond here ;
https://brainly.com/question/19382448
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Use the drop-down menus to select the names of the labeled structures.
A:
B:
C
Answer:
A:petal
B:pistil
C:stamen
Explanation:got it right on edu 2021
Answer:
C
A
B
Explanation: on ED about Identifying Earth’s Layers
what does indicator that a chemical change has occurred?
Answer:
change in color or state of matter
Explanation:
hope i helped! ❤❤
Someone please answer this in like 40 minutes
Before it’s due. Explain the answer too
Answer:
kkkwkisa
Explanation:
wulaoaiq8qiIq8qiaik
Which of Earth's five spheres is involved when a volcano erupts?
Answer:
[;
Explanation:
Mudflows (geosphere) and flooding may occur downstream from volcanoes and may inundate streamside communities (biosphere).
Students in Ms. Brown demonstrated several chemical reactions but the data did not represent the law of conservation of matter in
any of the four experiments. Kai and Maria are about to add 3 grams of magnesium (Mg) to a test tube of 30 grams of hydrochloric
acid (HCI). They covered their container with a balloon as a seal. If the girls expect a chernical change as well as evidence of the
Law of conservation of matter, choose ALL of the predictions that are appropriate?
A)
There will be a rapid evolution of gas.
B)
The mass of the products will equal 339.
The solid magnesium metal will disappear.
D)
The balloon covering the container will expand.
E)
There will be a dramatic change in temperature,
Answer:
Answer: everything except E
Explanation: There was no dramatic change in temperature and i just took the assignment.
According to the law of conservation of matter, matter cannot be created not be destroyed. In this experiment, no matter loss will occur but there will be rapid evolution hydrogen gas and the balloon will expand.
What is conservation of matter?According to conservation of matter, matter can neither be created nor be destroyed but its state and properties can be changed. The total mass of the reactants will be equal to the total mass of the products.
Magnesium is a second group element and is a metal. Metal reacts with hydrogen halides to form metal halides and hydrogen gas as the reaction written below:
[tex]Mg +2 HCl \rightarrow MgCl_{2} +H_{2}[/tex]
The evolved hydrogen gas in this reaction tries to diffuses out the sealing and thus the balloon cover expands. And thus the solid magnesium metal disappears to form magnesium chloride.
The evolution of gases is exothermic and therefore, the temperature outside increases suddenly. There we can see bubbles of hydrogen in the reaction system.
Therefore, the changes that occur in the experiments are, rapid evolution of gases, solid metal disappears, sealing cover expands and there occur a rapid change in temperature. Thus options A,C,D,E are correct.
To learn more about of conservation of matter, refer the link below:
https://brainly.com/question/11573747
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85. Compare a mole of Ag-108 and a mole of Pt-195 using
atoms, protons, electrons, and neutrons.
Explanation:
1 mol of an atom (irregardless of the element) contains the Avogadro's number of atoms. This is given as;
1 mol = 6.022 * 10^23 atoms
For a neutral atom;
NUmber of protons = Number of electrons
The relationship between proton and neutron is given as;
Mass Number = Protons + Neutrons
Ag-108
Atoms = 6.022 * 10^23 atoms
Protons = Atomic Number = 47
Electrons = 47
Neutrons = Mass Number - Protons = 108 - 47 = 61
Pt-195
Atoms = 6.022 * 10^23 atoms
Protons = Atomic Number = 78
Electrons = 78
Neutrons = Mass Number - Protons = 195 - 78 = 117
What name is given to this type of diagram
Answer:
There's no graph attached to the question
an object that is moving will stop when
Answer:
factor
Explanation:
Answer:
something pushes or pulls it to a stop.
8
This wasp was viewed under a microscope with a 40x objective lens and a 10x
eyepiece lens.
What was the total magnification
help its for my assessment
25 points
Answer:
400x
Explanation:
magnification=magnification of objective lens*magnification of eyepiece lens
m=40*10
m=400x