Answer:
An Atom
Explanation:
This is the smallest unit which still has the properties of an element.
Which of the following is the correct path of light through a reflecting telescope?
eyepiece → primary mirror → secondary mirror → eye
primary mirror → eyepiece → secondary mirror → eye
primary mirror → secondary mirror → eyepiece → eye
secondary mirror → primary mirror → eye → eyepiece
口
10. Which describes an element?
O They can combine with other elements to form atoms.
They were created in the Earth's core.
O They cannot be broken down any further.
O They were all discovered at the same time.
Someone just help me fr UWU
Answer:
They were created in the Earth's core.
The rest make no sense
Erosion and weathering _____.
are usually slow processes
can only happen in dry climates
do not change landforms
do not significantly change Earth's surface
My atomic mass is 35.453
Answer:
Chlorine Cl atomic # 17, atomic mass 35.453
Explanation:
My atomic mass is 35.453
Dmitri Mendeleev discovered the Periodic Table using atomic mass
look at your periodic table
only ONE element has an atomic mass of 35.453
Chlorine Cl atomic # 17, atomic mass 35.453
answer asap please!!!!!!!!!!!!!!!!!!!!!
Answer: c.
Explanation: Because it will increase temperature on thermometer y will decease.
12. Gavin is having a difficult time
moving his sofa across the living
room. He decides to place wheels on the legs of the sofa to make it easier, Which of the following forces is Gavin overcoming?
A Gravity
B Friction
C Buoyant force
D Unbalanced force
Answer:
Friction
Explanation:
the resistance that one surface or object encounters when moving over another.
Explain the different types of chemicals?
Gay-Lussac's Law explains how the temperature of a gas is related to its' .
Answer:
volume
Explanation:
How does the equation below support the idea that matter is not created or destroyed?
6H20 + 6CO2 -----> C6H12O6+ 602
Answer:
The reaction 6CO2 + 6H2O ---> C6H12O6 + 6O2 is the chemical equation for photosynthesis. In this reaction, carbon dioxide and water
Explanation:
give me brainlest please
What does the molecular structure of Y show?
Answer:
the molecular structure of y shows that it is solid
Explanation:
because in solid state atoms are tightly packed and they are attached to them closely
Rutherford concluded from his calculations that the volume of an atom Multiple Choice is filled with protons, neutrons and electrons. is mostly protons, with electrons revolving around the outside. is filled with electrons. is mostly empty space.
Answer: D is mostly empty space
Explanation: Rutherford's model shows that an atom is mostly empty space, with electrons orbiting a fixed, positively charged nucleus in set, predictable paths. Found this with his gold foil experiment
Calculate how many moles of potassium (K) are present in a sample of 8.12x10^23 atoms of K
Answer:
1.35 moles
Explanation:
Calculate how many
of potassium (K) are present in a sample of 8.12x10^23 atoms of K
6.02 X 10^23 atoms are 1 mole. how many 6.02 X 10^23 are in
8.12 X 10^23
divide 8.12 X 10^23 into sets of 6.02 X 10^23
(8.12 X 10^23)/(6.02 X 10^23) =1.35 moles
High temperature refrigeration is that produced by:
Answer:
. an air-conditioning system
what products or services are un demand in your community
CBD oils and products (profitable products) ...
Eco-friendly products (top trending products) ...
Natural skincare and cosmetics (popular beauty products) ...
Specialty teas (fast-selling items) ...
Diet fad-products (ideal for target audiences)
What is true about wind?(1 point)
Wind can only be warm.
Wind can only be warm.
Wind cannot cause things to move.
Wind cannot cause things to move.
Wind can be still.
Wind can be still.
Wind is always safe.
Wind is always safe.
Answer:
safe? I guess it to me
Answer:
I think c.
Explanation:
I am not sure tho
how does an indicator work
Answer: Indicators are substances whose solutions change color due to changes in pH
Explanation:
Answer:
EXPLANATION
Explanation:
[not sure exactly what you mean by indicator but here's my very basic answer lol] They are substances that change color due to changes in pH levels.
when 25 ml of 0.12 m aqueous ammonia is titrated with 0.12 m hydrobromic acid, what is the ph at the equivalence point?
The pH value will be equal to 3.29 at the equivalence point.
What is titration?Titration is the laboratory method that is performed to determine the concentration of the analyte. An indicator is used to know the equivalence point.
Given the concentration of HBr = 0.12 M
The concentration of ammonia = 0.12 M
The value of Kb for ammonia = 1.8 ×10⁻⁵
The chemical reaction is :[tex]NH_3 + HCl \longrightarrow NH^+_4 + Cl^-[/tex]
For the ammonia: NH₃ NH₄⁺ H⁺
Initial conc.: 0.12 M ---- -----
Change: - x + x +x
At equilibrium: 0.12-x x x
The acid dissociation constant :[tex]K_a =\frac{[NH_4][H^+]}{[NH_4^+]}[/tex]
[tex]\frac{K_w}{K_b} =\frac{[NH_4][H^+]}{[NH_4^+]}[/tex]
[tex]\frac{1\times 10^{-14}}{1.8\times 10^{-5}} =\frac{(x)(x)}{(0.12-x)}[/tex]
[tex]5.56\times 10^{-10}=\frac{x^2}{0.12-x}[/tex]
x² + 5.56× 10⁻⁵ x- 46.33 × 10⁻¹⁰ = 0
x = 4.57 × 10⁻⁵
The concentration of hydrogen ions = 4.57 × 10⁻⁵
The pH value = - log [H⁺]
pH = -log [4.57 × 10⁻⁵]
pH = 3.29
Learn more about titration, here:
https://brainly.com/question/2728613
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A gas has a volume of 0.215 L and a temperature of -20.0 oC. The gas is heated to 60.0 oC at constant pressure. What will happen to the volume of the gas
Answer:
V1/T1 = V2/T2
we must convert temperature from °c to kelvin
so T1= -20+273.15=253.15
and T2 = 60 +273.15= 333.15
0.215/253.15= V2/333.15
V2= 0.28L
hence, volume increases a little bit
On what two days would the UK, Chile, South Africa, and Japan have an equal amount of day and night? O Winter Solstice and Summer Solstice 0 Spring Equinox and Fall Equinox 0 Fall Equinox and Summer Solstice O Winter Solstice and Spring Equinox
Through which of the following room-temperature substances would sound travel the slowest? a water b rubbing alcohol c oxygen d glass
Answer:
id say oxigan
Explanation:
i dont realy know but if im rong correct me
Answer:
Oxygen
Explanation:
Sound energy vibrates atoms andecause of this phenomenon, sound moves at a higher speed through solids than through liquids. Sound moves at its slowest speeds through gases. molecules of matter as it travels through a medium. The more tightly packed the particles of a medium, the faster sound energy will transfer through it.
True or false Cell division in Prokaryotes that form two genetically identical cells is know as fission.
What is the Molarity of a Ca(OH)2 solution if 30.0mL of the solution is neutralized by 26.4mL of 0.25M HCI
solution?
Answer:
0.11M
Explanation:
What is the Molarity of a Ca(OH)2 solution if 30.0mL of
the solution is neutralized by 26.4mL of 0.25M HCI solution?
1L (1000 ml) of the HCl contains 0.25 moles of H ion
26.4 ml contains ( 26.4 X0.25/1000) moles of H ion ion
=0.0066 moles H ion
2HCl +Ca (OH)2-----> 2H2O +CaCl2
SO 2 H IONS NEUTRALIZE 1 Ca(OH)2 MOLECULE
00066 moles H ion neutralize 0.0033 moles Ca(OH)2
the 0.0033 moles are distributed over 30 ml, so the concentration of the
Ca(OH)2 IS 0,0033/(30/1000) =0.11 moles/liter or 0.11M
a student places iron metal over a flame, and begins to react with oxygen gas in the air. A red, powdery solid begins to form on the iron. What is the name of the red solid?
Answer:
Iron, as well as iron alloys, rusts because of a chemical reaction known as oxidation. When iron is exposed to moisture or oxygen, oxidation occurs. During this chemical reaction, iron is converted into iron oxide
In a circus, a 50 kg clown is shot out of a cannon at 20 m/s. What is his momentum?
Answer: 1000 kg * m / s
Explanation:
momentum is equal to mass times velocity!
50 times 20 is
1000
so momentum is 1000 kg * m/s
Ice waters melt to form liquid water The water spreads out to match the shape of its container after heating on the stove the water begins to boil and change into steam which statement is true about this process
Answer:the water starts to boil and creates steam
Explanation:
How do you determine the name of an element using protons, neutrons, and electrons?
Answer:How do you determine the name of an element using protons, neutrons, and electrons?
By knowing the number of protons, you know the atomic number. If you know the atomic number you know which element it is in the Periodic Chart. A good Periodic chart should give you enough information to determine the name of the element.
Explanation:
please mark me as brainliest
Muscle Activity
A
B
с
8. The flow of energy through an ecosystem
Sun Food ATP
involves many energy transfers. The diagram
below summarizes the transfer of energy that
eventually powers muscle activity. The process of cellular respiration is
represented by
a. arrow A, only
c. arrow B, only
b. arrow C, only
d. arrows A. B. and C
Group 8A (noble gases) don’t react with other elements because
a
they can have either a positive or a negative charge.
b
their outermost energy level is missing one electron.
c
their outermost energy level is full.
d
they readily form positive ions.
Identify which level of organization is shown in the pictures. choose from the box. some words may be used more than once
Words in box: Organism, Cell, Tissue, Organ, Organ System
Answer:
1) Organ
2) Organism
3) Organ System
4) Tissue
5) Cell or Tissue (im not sure)
6) Organism
7) Organ
8) Organism
9) Organism
PLEASE HELP ASAP
Question 2 of 10
Which is required for karst topography to form?
A. Limestone
B. Basalt
C. Quartz
O D. Granite
Answer:
Limestone
Explanation:
Limestone is required , hope it helps :)
A is the answer
Answer: Karst is a topography formed from the dissolution of soluble rocks such as limestone, dolomite, and gypsum. It is characterized by underground drainage systems with sinkholes and caves
