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. Remember that the density of water is about 1 g/cm3.
A reaction where heat is added is a(n)
endothermic reaction
heterogeneous reaction
reversible reaction
in endothermic reaction heat is added
Plzzzzz help me answer this question (WILL AWARD BRAINLIEST)
Modeling Nuclear changes
Answer:
can someone please do this and put the answers below !!!!
Explanation:
A student read that a block has a density of .70g/cm^3. When she tested this she got .63g/cm^3. What is her percent error
Answer:
The answer is 10 %Explanation:
The percentage error of a certain measurement can be found by using the formula
[tex]P(\%) = \frac{error}{actual \: \: number} \times 100\% \\ [/tex]
From the question
actual density = 0.7 g/cm³
error = 0.7 - 0.63 = 0.07
So we have
[tex]p(\%) = \frac{0.07}{0.7} \times 100 \\ = 10[/tex]
We have the final answer as
10%Hope this helps you
Which process occurs in a fission nuclear reactor?
Nuclei combine.
Nuclei split apart.
Neutrons combine.
Neutrons split apart.
Answer:
Nuclear fission/ split apart
Explanation:The process of splitting a nucleus is called nuclear fission and is used in nuclear power reactors. Fission is another word for splitting.
Hope this helps! brainlyeast would only be necessary if this helped you thanks! :) have a good day!
Answer:
The correct answer is B. Nuclei split apart
Explanation:
EDGE2022
Balance the following redox reaction in acidic solution.
Br (aq)+HNO2(aq)
Br2(0)+NO(9)
Answer:
2Br(aq)+2HNO2(aq)+2H(aq)------->Br2(l)+2NO(aq)+2H2O(l)
Explanation:
The given redox reaction can be balanced in acidic medium as follows:
[tex]\rm 2 Br^{-} + HNO_{2} + H^{+} \rightarrow Br_{2} +NO + H_{2}O[/tex]
What is redox reaction?A reaction involving both oxidation and reduction is called redox reaction. One species is getting oxidized here whereas another species reduces. The substance which is oxidized is called oxidant and the reduced species is called reductant.
In the given reaction of bromine gas with nitrous acid, bromine oxidizes from -1 to zero whereas nitrogen reduces from +3 to +2. The reaction can be occurred in acidic medium.
The redox reaction written in acidic medium involves H+ and water properly added to either sides. The balanced redox reaction of the given one in the acidic medium is thus as written above.
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If an object is suspended in a fluid, neither sinking nor floating, then:
A) The buoyant force is larger
B) The buoyant force is smaller
C) The Buoyant force is equal to the density
D) The buoyant force is equal to the weight
If you change a substance into a new substance
Answer:
Explanation: Chemical changes cause a substance to change into an entirely substance with a new chemical formula. And chemical changes are also known as chemical reaction.
How many atoms of each element are in 4Na3PO4?
Answer:
12 sodium 4 phosphorus 16 oxygen. makes the table below to determine the number of atoms of each element in the chemical formula 4Ca(ClO3)2.
which element has the largest atomic radii in the 3rd period of the periodic table?
Answer:
Sodium (Na)
Explanation:
What mass of NH4NO3 would you need to make 250.0mL of a 0.78M solution?
A) 0.20 g
B) 13g
C) 16g
D)2.5x102g
Answer:
a
Explanation:
Hope is testing a substance using blue litmus paper. The paper turns red. The substance is _____.
a neutral
an acid
a base
Answer:
the substance is an acid
Forecasting the weather for a specific area is relatively easy because of all the technology that is available.
A. True
B. False
Answer:
A
Explanation:
what is the difference between luster and dull
Luster means Shiny. Dull means simple and not full of detail. Hope this helps!Please Rate Brainiest!
-Aslina
after felix adds salt to the boiling water what will he have in the pot
Answer:
Salty water
Explanation:
Sorry for wasting your time.
Which of the following identifies the type of radiation that scientists most likely observed?
Radio
Infrared
Ultraviolet
Gamma Rays
Answer:gamma rays
Explanation:
How many types of rocks can form from the rock cycle?
0 1
02
O 3
04
Answer:
Sedimentary, igneous and metamorphic
Metomorphic, heat and pressure
Sedimentary erosion and weather
Igneous magma and lave
So three!
what is one beneift of using scientific notation instead of regular notation
Answer:
its shorter than a regular one
Explanation:
the only reason is simply because it is shorter
The diagram shows a balloon that was rubbed with a piece of cloth what is the change
Answer: the electric charge
Explanation:
How many valence electrons would be used in drawing the Lewis Structure CF4?
Answer:
32
Explanation:
You have 7 valance electrons in fluorine, and you have 4 of them. 7*4=28. Then, you have 4 valance electrons on carbon. So 28+4=32
What is the energy of a photon of red light having a frequency of 3.08 x 10^14 HZ?
Answer:
2.04 x 10⁻¹⁹J
Explanation:
Given parameters:
Frequency = 3.08 x 10¹⁴Hz
Unknown:
The energy of the photon = ?
Solution:
The energy of a photon is given as;
E = hf
Where h is the planck's constant
f is the frequency
Insert the parameters and solve;
E = 6.63 x 10⁻³⁴ x 3.08 x 10¹⁴
E = 20.4 x 10⁻³⁴⁺¹⁴
E = 20.4 x 10⁻²⁰ = 2.04 x 10⁻¹⁹J
Answer:
2.97*10-19 j
Explanation:
E=Energy of photon
H=Planck constant=6.626*10-34
V=Frequency of photon
we can plug what we already know E=(6.626*10-34)(4.48*10 14)
How do changes in population size relate to environmental conditions?
Answer:
No simple relationship exists between population size and environmental change. However, as global population continues to grow, limits on such global resources as arable land, potable water, forests, and fisheries have come into sharper focus.
Explanation:
Electro magnetic waves are blank waves
What’s the blank PLEASE HELP DUE IN 25 MINUTES!!!!
Answer:
Electromagnetic waves or EM waves are waves that are created as a result of vibrations between an electric field and a magnetic field. Hope it helps ;)
The scientific theory of plate tectonics states that the Earth's crust is composed of many plates, or slabs of rock. Interactions of these plates have created different landforms, or geologic features. Which of the following statements provides evidence for this theory?
A.
A large earthquake off the coast of Japan induces a wave that is over twenty feet high.
B.
An iceberg buckles the hull of the Titanic and allows water to enter between the steel plates.
C.
The city of Pompeii is perfectly preserved under volcanic ash following the eruption of Mount Vesuvius.
D.
Fossilized marine creatures can be found at the top of the Himalayan Mountains.
Answer:
study island
proof
Explanation:
Fossilized marine creatures found at the top of the Himalayan Mountains provide evidence for a scientific theory of plate tectonics. Therefore, option (D) is correct.
What is Plate tectonics?Plate tectonics can be explained as the Earth's lithosphere being made of a large number of tectonic plates that have been slowly moving since about 3.4 billion years ago.
The lithosphere is broken into 7 or 8 major plates and many minor plates or "platelets". These plates meet, and their relative motion evaluates the kind of plate boundary: convergent, transform, or divergent.
Mountain-building, Earthquakes, volcanic activity, and oceanic trench formation take place along these plate boundaries. The relative annual movement of the plates ranges from 0 to 10 cm.
Tectonic plates are comprised of the oceanic and the thicker continental lithosphere. The process of subduction which is actually one plate moving under another carries the edge of the lower plate down into the mantle along convergent boundaries.
Pebbles, Shells, and marine fossils found in the limestone beds of the tallest Himalayas Mountains give evidence of the theory of plate tectonics.
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6. Which of the following units would be MOST appropriate for measuring
the length of a car?*
1 poin
A. Millimeters
B. Centimeters
C. Meters
D. Kilometers
7. Which of the following units would be MOST appropriate for measuring
1 point
Answer:
Meter
Explanation:
As the vibration of molecules increases, the _____ of the substance increases.
temperature
internal energy
kinetic energy
all of the above
Answer:
Answer option D- all of the above
PLEASE HELP ASAP! WILL MARK YOU AS BRAINLIEST!!!
Answer:
what are the options?
Explanation:
The volume of an ideally behaving gas is 300 L at 227°C. What volume will the gas occupy at 27°C when pressure remains constant?
Answer:
[tex]V_2=35.68\ L[/tex]
Explanation:
Initial volume, V₁ = 300 L
Temperature, T₁ = 227°C
New temperature, T₂ = 27°C
We need to find the volume of gas occupied when the temperature is 27°C.
It is based on Charle's law. A/c to Charle's law,
[tex]V\propto T[/tex] (at constant pressure)
[tex]\dfrac{V_1}{V_2}=\dfrac{T_1}{T_2}\\\\V_2=\dfrac{V_1T_2}{T_1}\\\\V_2=\dfrac{300\times 27}{227}\\\\V_2=35.68\ L[/tex]
Hence, the new volume is 35.68 L.
A lead ball has a mass of 5.910 g and a diameter of 10.0 mm. What is the density of lead in grams per cubic centimeter
Answer:
Explanation:
The formula is density = mass÷volume
Values given are:
mass = 5.910g and
diameter = 10.0 mm = 1cm
so, we need to find the volume first.
Volume of a sphere is (4/3)πr³
thus, V = 4.189 cm³
Density = mass ÷ volume
density = 5.910 ÷ 4.189
= 1.411 g/cm³
are all physical reactions reversible?
A) No, while some such as freezing are, others, such as breaking glass aren't.
B) Yes, every single one of them are!
Answer: answer is A
Explanation: