Answer:Answer to: A function f is defined on the interval ~[0,4], and its derivative is { e^{sinx} - 2cos3x } a. on what interval is f increasing? b....
Missing
Explanation:
Scientists use the chemical and physical properties of matter to differentiate substances. Which of the following is a chemical property?
(A) A starch sample turns blue when introduced to iodine
(B) Gold's property of malleability allow it to be shaped into a ring.
(C) Salts exhibit electrical conductivity.
(D) A metal is identified by its density.
Answer:
a.) A starch sample turns blue when introduced to iodine
Explanation:
A is a chemical change whereas the other answers would be physical changes.
The chemical property has been the turning of the iodine blue with starch introduction. Thus, option A is correct.
The substance properties can be differentiated as Physical properties and chemical properties. Physical properties can be defined as the properties that do not lead to the change in the chemical composition of the compound, For example, electrical conductivity, malleability, density, etc.
The properties of the compound that have been led to the change in the chemical composition of the compound have been termed chemical properties. For example. burning, reduction, etc.
Since the starch sample has been reacted with iodine there has been a chemical change that leads to the product of blue color. Thus, the starch turning iodine blue has been the chemical property. Thus, option A is correct.
For more information about the chemical properties, refer to the link:
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3. What mass of water vapor condenses if 435 kJ of heat are released in the process? a a 10.79 b 982 g C 1.30 x 10 g d 1939
Mass of water vapor = 193 g
Further explanationGiven
435 kJ of heat are released
Required
mass of water vapor
Solution
The heat to change the phase can be formulated :
Q = mLf (melting/freezing)
Q = mLv (vaporization/condensation)
Lv for water = 2256 kJ/kg or 2256 J/g or 40.7 kJ/mol
So the mass of water vapor :
[tex]\tt m=\dfrac{Q}{Lv}\\\\m=\dfrac{435000~J}{2256~J/g}\\\\m=192.8\approx 193~g[/tex]
How do secretions of apocrine glands differ from those of the eccrine sweat glands
Which element in Group 18 of the Periodic Table has the highest lonization energy?
all the elements in group 18 are Nobel gases or inert gases . all the elements such as neon , helium, argon etc. ,their outermost shell is completely filled . The noble gases have the largest ionization energies, reflecting their chemical inertness
What is the molecule that formed between B and F?
Answer:
BF3
Explanation:
For this question, you need to use the number of valence electrons present in each element. Boron is in group 3/13 on the periodic table so you know it has 3 valence electrons while Fluorine is in group 7/17 so it has 7 valence electrons. These elements are both covalent so they will share electrons. All elements in the first three rows want to reach either have 8 valence electrons or zero valence electrons depending on whichever is easier. When B and F interact each Fluorine will only want to take one electron, but Boron wants to get rid of all 3 electrons, so it will bond with 3 Fluorine to get rid of all its valence electrons.
I hope this helps.
A 12.4 mL solution of sulfuric acid is completely neutralized by 19.8 mL of 0.0100M calcium hydroxide.
What is the concentration of the sulfuric acid solution?
Answer:
It's the number after what I mean is like its 12.4 mL right now skip ahead its 13.5 mL
Explanation:
I tried pls dont be mad I spent 3 hrs on this :((
Right answer gets brainlist
Why do commercial airliners encounter very little turbulence above 25,000 feet?
Group of answer choices
There are no clouds above 25,000 feet.
Water vapor has mostly disappeared at colder elevations and its effect on weather turbulence.
The air is so thin at altitudes above 25,000 feet that turbulence has much less effect.
The jet stream produces a much smoother flow of air.
Answer:
Water vapor has mostly disappeared at colder elevations and its effect on weather turbulence.
Explanation:
Answer:
B. Water vapor and its effect on weather turbulence has mostly disappeared at colder elevations.
Explanation:
Hope this helps
Where do most earthquakes occur? Where do most volcanoes occur? Why do they occur here?
Answer:
The Ring of Fire, also referred to as the Circum-Pacific Belt, is a path along the Pacific Ocean characterized by active volcanoes and frequent earthquakes. The majority of Earth's volcanoes and earthquakes take place along the Ring of Fire
Explanation:
Answer:
Most earthquakes occur along the edge of the oceanic and continental plates. The belt exists along boundaries of tectonic plates, where plates of mostly oceanic crust are sinking beneath another plate.
Most volcanoes are found along a belt, called the “Ring of Fire” that encircles the Pacific Ocean. As the plates move, they spread apart, collide, or slide past each other. Sixty percent of all active volcanoes occur at the boundaries between tectonic plates.
Complete the chart below for a patient that has diabetes. Use the words
Low, Normal, High, and None.
Body Part and System
Test Results
Mouth (digestive system)
Starch:
Oxygen:
Glucose:
Small intestine (digestive system)starch:
Oxygen
Glucose:
Lungs (respiratory system)
Starch:
Oxygen:
Glucose:
Cells
Starch:
Oxygen:
Glucose:
Answer:
It picked out for the best time for man to the earth for the earth and the earth in the moon to moon earth earth moon earth and moon earth moon and moon earth lord earth moon earth lord moon earth moon and earth moon earth lord lord moon earth moon lord moon earth lord moon lord
Explanation:
Can someone please help me with this???
Answer:
1)
Hg
80 protons, 80 electrons, 121 neutrons
2)
Mo
42 protons, 42 electrons, 54 neutrons
3)
Symbol is Cu, Mass is 64, 29 Protons
4)
C
Atomic number is 6, 6 protons, 6 electrons, 6 neutrons
5)
Symbol is P, 15 protons, 15 electrons, 16 neutrons
6)
Pb
Atomic number is 82, 82 electrons, 125 neutrons
7)
Na
Mass is 23, 11 protons, 11 electrons.
Hopefully this helps!
Na3(PO4) + HCl yields NaCl + H3(PO4)
Chemical Equation Balancer
23. Soluble salts can be prepared using
the following methods except by
A. action of dilute acids on
metals.
B. action of dilute acid on an
insoluble base.
C. direct combination of
constituent elements.
D. neutralization reactions.
E. precipitation from solutions,
help ple*zzzz*zzz*
Answer:
I think crystallization is a write answer for this question
Explanation:
but according to this (E is the write answer)
What is the molecular formula of sodium peroxide by criss cross method
Answer:
Na2O2
the formula of sodium peroxide
which of the following is a renewable resource a. copper b. aluminum c. peanut oil d. natural gas
Answer: c. peanut oil
Explanation:
20 POINTS PLEASE HURRY At the center, 6 unmarked red balls are interspersed with 4 blue balls marked with plus signs. A green cloud with 2 concentric white lines surrounds the center, with 2 small green balls marked with minus signs on the inner white line and 2 small green balls marked with minus signs on the outer white line.
How many neutrons does this atom have?
4
6
10
14
Answer:
6
Explanation:
because newtrons dont have a charge so the red ones in the middle count those and you get 6
Answer:
The answer is 6
Explanation:
Which of these chemical equations demonstrates the law of conservation of mass?
F. C3H8 + 4 O2 → 3 CO2 + 4 H2O
G. 2 H2 + O2 à 2 H2O
H. H + O à H2O
J. Mn(OH)2 + H3PO4 à 2Mn3(PO4)2 + 2H2O
Answer:h
Explanation:
It takes 7.21 1019 J of energy to remove an electron from an iron atom. What is the maximum wavelength of light that can do this
Answer:
2.75 × 10^-45 m
Explanation:
From;
E= hc/wavelength
h= Plank's constant= 6.6 × 10^-34 Js
c= speed of light=3× 10^8 ms-1
Wavelength = 6.6 × 10^-34 × 3× 10^8/7.21 × 10^19
Wavelength= 2.75 × 10^-45 m
An 80 gram sample of a radioisotopes decayed to 40 grams in 3 days how many grams of the original sample would remain after 9 days
Answer: 10 grams
Explanation: Original sample is 80 gram and every three days half of its composition decays so 80 down to 40 in the first 3 days, 20 in the next three days, and 10 in the last three days
The Earth's _____ provides protection from meteorite impacts by causing them to _____.
please leave a simple answer
Answer:
atmosphere, break up
Explanation:
Answer:
Atmosphere, break up
Explanation:
What type of ion would be created if magnesium lost 2 electrons?
cation
anion
neutral ion
Answer:
Explanation:
It is not neutral.
Magnesium would have a charge of plus 2. That makes it a cation. The Cathode attracts + charged ions.
Is 2CO + O2 -> 2CO2 A balanced or unbalanced equation
Answer:
It is balanced.
Explanation:
You have the same amount of atoms on both sides. 2 carbon and 4 oxygen.
Where are chlorofluorocarbons (CFCs) found? Why were they banned?
Answer:
A gaping hole in the ozone layer over Antarctica was discovered in the mid 1980s. The international community agreed the Montreal Protocol in 1987, which banned most of the offending chemicals.
Hope this helps..Please Answer ASAP!!
What happens to the velocity of an object when balanced forces act on it?
a.
There will be no change
c.
There will be negative acceleration
b.
There will be positive acceleration
d.
Velocity will change, but not acceleration
Please select the best answer from the choices provided
Answer:
C. There is a negative acceleration
Explanation:
I majored in Physics
Which of the following is the correct word equation for the reaction described below?
Calcium hydroxide and hydrogen gas are produced by the reaction of calcium hydride and water.
calcium hydride + hydrogen → calcium hydroxide + water
calcium hydride + water → calcium hydroxide + hydrogen
calcium hydroxide + hydrogen → calcium hydride + water
calcium hydroxide + water → calcium hydride + hydrogen
Explanation:
calcium hydride + water → calcium hydroxide + hydrogen
hope it helps!
Answer:
B
Explanation:
got it right on edg
What is the coordination number for Potassium Nitrate?
Answer:
The coordination number is 8
Potassium nitrate has an octahedral coordination structure
Which phrases describe sedimentary rock?
Divergent tectonic plate boundaries most commonly form one: A non-volcanic islands. B ocean trenches C continental mountains D ocean ridges
Answer:
D. ocean ridges
Explanation:
Answer:
I think A
Explanation:
Most volcanoes form at the boundaries of Earth's tectonic plates. ... The two types of plate boundaries that are most likely to produce volcanic activity are divergent plate boundaries and convergent plate boundaries
Nuclear fusion reactions release more energy than fission reactions while also generating less waste. However, nuclear fusion reactors are not currently used to generate electricity.
What is the main reason for this?
Nuclear fusion reactions release high energy and required tremendous temperature of nuclear reactors is the main reason for not used to generate electricity.
What are nuclear reactions?Nuclear reactions are those reactions which are taking place in the nucleus of any unstable atom and produces energy.
As in the question it is given that nuclear fusion reactions releases more energy and less wastage, but this energy are releases in the tremendous amount which can be proved harmful for the environment and the humans. To carry out this reaction we have to maintain the very high temperature of nuclear reactors of about 6 times greater than sun's temperature, which is not possible manually.
Hence, high temperature of nuclear reactors and high amount of energy released is the main reason.
To know more about nuclear reactions, visit the below link:
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I can be found in the 4th period on the periodic table.
Vanadium (V)
Zirconium (Zr)
Carbon (C)
Beryllium (Be)
Vanadium (V)
Vanadium is the only one in the 4th period here so