Answer:
I don't think so that there is anything that can reduce negative impact of disaster.
Answer:
it damage our home,field
What is Mercury made of what can we know about mercury
Answer:
Its a rock planet and has an iron core
Explanation:
Answer:
"a rocky planet with a huge iron core"
it takes up nearly 3/4of the planets diameter
It orbits around the sun
Explain how failing to conserve water can lead to an increase in water contamination.
Answer:
Failure to conserve water during irrigation can lead to an increase in pollution that results from runoff. Natural filters are diminished by the overuse of water resources, which leads to an increase in water contamination that would have been filtered by these natural sources.
Explanation:
Answer:
a. Overirrigating fields causes an increase in pollution that results from runoff.
b. Natural water filters are depleted by the overuse of water.
c. Sewage systems are more likely to fail due to greater demand, causing higher chances of water contamination.
Which statement best describes what makes a base weak? A base is weak when it forms few ions in water. A base is weak when only a little of it is dissolved in water. A base is weak when its concentration is high. A base is weak when it totally forms ions in water.
Answer:
A base is weak when only a little of it is dissolved in water
Explanation:
Answer: B.) A base is weak when only a little of it is dissolved in water
Hope this helps :)
Write the dissociation of hydrosulfuric acid
Answer:
Explanation:
Hydrosulfuric acid (H_2S) is considered a 'weak acid." It dissociates in water according to this reaction: H_2 S(aq) + H_2O(t) HS^-(aq) + H_3O^+(aq) k_a = 9 times 10^-8 Hydroiodic acid (HI) is considered a "strong acid".
Can someone please help with these questions!! I would really appreciate it
Answer: water
Explanation: those elements all react to water , so the answer would be water . :)
True or False all non - metal elements are gassed at room temperature.
Answer:
false
Explanation:
you have bromine , its a non metal and liquid in room temperature
A glass jar is sealed, trapping air inside. The jar warms up after it is left ourside in the sun. What will happpen to the pressure inside the jar? Explain by talking about particle collisions.
Answer:
the particles start to spread out and cause it to get warmer
Explanation:
5.) If 6 moles of Oxygen Gas (O2) are produced in the reaction below, how
many grams of Potassium Chloride (KCI) are also produced? *
2 KCIO3 → 2 KCI + 3 O2
Answer:
im really sorry but i dont no☹
Los ácidos y el pH son muy importantes en la digestión de los alimentos. Pero ¿por qué se pone en riesgo la salud con lo que comes?
Answer:
Plssssssssd can you translate to English???
A magnet is a material that exerts a __________________ on (a) ___________ material.
A. magnetic force, magnetic
B. force, solid
C. magnetic force, anyother
D. force, metal type
Answer:
A
Explanation
Any material that exerts magnetic force is considered a magnet. Like all other forces, a magnetic force is a gravitational force. The area between the poles of a magnet has the strongest effect. Magnets attract wood and materials that contain iron.
MARK AS BRAINLEST!!
what is pollution?
when the tip of
a
plant is cut, it does not grow tall, why
Answer:
Explanation: the tip of a growing plant contains special rapidly diving cells called apical meristem ,these cells are responsible for increase in the length of the plant . if we cut out these cells ,length growth of the plant will be stunned as these cells are not present anyplace else.
1.How many moles of each element are in 0.0250 mol of K 2 Cr O 4? 2. How many moles of ammonium ions are in 4.50 mol of (N H 4 ) 2 CO 3 ? With all the process to see where you get the answers please
Answer:
1. 0.0500 moles K, 0.0250 moles Cr and 0.1000 moles O.
2. 9.00 moles ammonium ions are present.
Explanation:
1. In 1mol of K2CrO4 there are 2 moles of K, 1 mole of Cr and 4 moles of O.
The moles in 0.0250 moles K2CrO4 are:
0.0250mol * 2 = 0.0500 moles K
0.0250mol * 1 = 0.0250 moles Cr
0.0250mol * 4 = 0.1000 moles O
2. In 1 mole of (NH4)2CO3 there are 2 moles of ammonium ions, NH₄⁺.
In 4,50 moles are:
4.50 moles * 2 = 9.00 moles ammonium ions are present
btainliest if correct!!!
What is pair production?
A. An example of mass to energy conversion. B. Production of a neutron from an electron and a proton.
C. None of these
D. The creation of an electron and a positron from a gamma photon.
Answer:
B.
Production of a neutron from an electron and a proton.
Explanation:
Hope this helps
Answer:
D. The creation of an electron and a positron from a gamma photon.
Explanation:
Answers Via Educere/Founders Education.
A 2.0 L flask contains nitrogen and oxygen gases at 25°C. The total pressure is 0.91 atm and contains 0.050 mol of nitrogen. Calculate the partial pressure of oxygen and moles of oxygen present
Answer:
.025 ml 02
Explanation:
I made a pdf and pasted it in and etc
Water has a specific heat of 4.18 J/g°C. If 35.0 g of water at 98.8°C loses 4.94 kJ of
heat, what is the final temperature of the water?
O 57.2°C
0 65.0°C
O 47.2°C
O 32.0°C
Answer:
65°C
Explanation:
Formula for calorimetry is:
Q = C . m . ΔT
Where Q is heat, C is specific heat, m is mass and ΔT is the difference between final T° and initial.
We have all data to replace.
First of all, we convert kJ to J → 4.94 kJ . 1000 J / 1 kJ = 4940 Joules
We made this conversion because the unit of C, is in J
As heat is lost, we have to think in a negative value. Let's replace:
- 4940 J = 4.18 J/ g °C . 35 g . ( Final T° - 98.8°C)
- 4940 J / (4.18 J/ g °C . 35 g) = Final T° - 98.8°C
Final T° = - 4940 J / (4.18 J/ g °C . 35 g) + 98.8°C
Final T° = 65.03 °C
Notice, that this answer has sense because as T° decreased, heat has been lost.
What is the [OH-] in a solution that has a [H+] = 4.51 x 10^-6M?
Answer:
2.22×10⁻⁹ M
Explanation:
Applying,
[OH⁻][H⁺] = 1×10⁻¹⁴................... Equation 1
Where [OH⁻] = Hydroxyl ion concentration, [H⁺] = Hydrogen ion concentration.
make [OH⁻] the subject of the equation,
[OH⁻] = 1×10⁻¹⁴/[H⁺]............... Equation 2
From the question,
Given: [H⁺] = 4.51×10⁻⁶ M
Substitute into equation 2
[OH⁻] = 1×10⁻¹⁴/4.51×10⁻⁶
[OH⁻] = 2.22×10⁻⁹ M
45.6 grams of CH4 is placed into a 275 mL container at 55.00C. What is the pressure inside the container in atm?
Given-
Mass of CH4 - 45.6 grams
Molar mass of CH4 - 16.04 g/mol
volume - 275mL
Temperature- 55°C
Solution,
moles of methane (CH4) n = 45.6/16.04
= 2.84 moles
Using Formula,
Pv = nRT
P*275 = 2.84*8.314*55
P = 1298.64/275
P = 4.72 Atm.
Answer - The pressure inside the container in atm is 4.72.
45.6 grams of CH4 is placed into a 275 mL container at 55.00 C. The pressure is 4.72 atm.
What is partial pressure?The pressure that one of the gases in a mixture would exert if it were in the same volume on its own.
Given the mass is 45.6 grams
The volume is 275 L
Temperature is 55.00 C.
Calculate the moles
[tex]\rm Number\;of \;moles= \dfrac{mass}{molar\;mass}\\\\\rm Number\;of \;moles= \dfrac{45.6}{16.04} = 2.84 moles[/tex]
Now, calculating the pressure
PV = nRT
[tex]P\times 275 = 2.84\times 8.314\times 55 = 4.72 atm.[/tex]
Thus, the pressure inside the container in is 4.72 atm.
Learn more about pressure
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List two differences between copper and
carbon.
Answer:
Copper is a good conductor but carbon isn't
Copper has 1 valence electrons but carbon has 4 valence electrons
Explanation:
The two differences between copper and carbon is that of electronic configuration due to which copper is a metal and carbon is a non-metal.
What is electronic configuration?
Electronic configuration is defined as the distribution of electrons which are present in an atom or molecule in atomic or molecular orbitals.It describes how each electron moves independently in an orbital.
Knowledge of electronic configuration is necessary for understanding the structure of periodic table.It helps in understanding the chemical properties of elements.
Elements undergo chemical reactions in order to achieve stability. Main group elements obey the octet rule in their electronic configuration while the transition elements follow the 18 electron rule. Noble elements have valence shell complete in ground state and hence are said to be stable.
Learn more about electronic configuration,here:
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The ionization energies required to remove successive electrons from one mole of calcium atoms are 590 kJ/mol, 1145 kJ/mol, 4912 kJ/mol, and 6474 kJ/mol. The most common ion of calcium is probably
Answer:
Ca^2+
Explanation:
As we know, more energy is required to remove an electron from a positively charged ion than is required to remove an electron from a neutral atom. Hence, the second ionization energy of calcium is greater than its first ionization energy.
However, the third and fourth ionization energies of calcium are much higher than the second ionization energy because they involve removal of electrons from an inner filed shell. This process requires a lot of energy and is often not feasible.
Hence, the most common ion of calcium must be Ca^2+ where only two electrons are removed from calcium.
How many chlorine particles are in 4.5 moles in sig figs
Answer:
2.71×10²⁴ particles
Explanation:
Applying Avogadro's constant
Avogadro's constant states that, The number of specified particles contained in a mole of a substance is equal to 6.02×10²³.
From the question,
If one mole of chlorine contains a particle of 6.02×10²³,
Therefore,
4.5 moles of chlorine will contain a particle of (4.5× 6.02×10²³)
⇒ 27.09×10²³
Hence the number of particle contained in 4.5 moles of chlorine ≈ 2.71×10²⁴ particles
Please hurry Which of the following statements is true?
Protons are able to move easily in an insulator
electrons are able to move easily in a conductor
electrons are tightly held by a conductor
electrons are able to move easily in an insulator
protons are the charge carried in a conductor
The atmospheric pressure on Stevens pass was measure to be 589mmHg. What is the pressure in atm
Answer:
The pressure is equal to 0.775 atm.
Explanation:
Given that,
The atmospheric pressure on Stevens pass was measure to be 589mmHg.
We need to find the pressure in atm.
We know that,
1 standard atmosphere = 760 mm Hg
1 mm Hg = (1/760) standard atmosphere
589 mm Hg = (1/760)× 589 standard atmosphere
= 0.775 standard atmosphere
Hence, the pressure is equal to 0.775 atm.
Name the following alkyne:
Answer:
There isn't any picture for me to see
have a good day :)
Explanation:
define restivity and conductivity?
Answer:
Electrical resistivity is a property of a material that tells you how much it resists the flow of electric current, while conductivity quantifies how easily current flows.
What is AH and what type of equation is it used fo!? Why?
Answer:
I think it has to do with batteries 'n stuff
AH— Ampere Hour
2CO +0, 200, what is the mole ratio of carbon monoxide to carbon
dioxide
A 1.2
B 2.2
C 2:1
D 3:1
Answer:
B. 2.2
Explanation:
The carbon dioxide is released when limestone is heated during the
production of _____?
Carbon dioxide is released when limestone is heated during the production of [tex]\sf\purple{cement}[/tex]. ✔
[tex]\circ \: \: { \underline{ \boxed{ \sf{ \color{green}{Happy\:learning.}}}}}∘[/tex]
which of the follwing is false ? A . the mass of proton is heavier than electron . B . protons and electron are found in nucleus C . Nucleus is very small but massive D . Neutrons are neutral particles
Answer:
C
Explanation:
The nucleus is very dense
Read the following summary, which describes blood flow and heart output in space. Then, answer the question.
The heart doesn't have to do as much work to pump blood when in orbit. After only one day beyond Earth's gravity, astronauts have a lower blood volume. They can lose as much as 20 percent of their blood volume while on a space mission. Since the body has less blood to push around and the heart is pushing more blood with each beat, an astronaut's heart rate also slows down to compensate.
What process is being described?
a
Breathing
b
Excretion
c
Homeostasis
d
Respiration
The primary function of a chloroplast is to -
F . Convert food into energy a cell can use
G . Control the function of a cell and control genetic traits
H . Convert radiant energy into chemical energy through photosynthesis
J . Store water and nutrients
Please help!!!