Answer:
Such was the case with the concept of pH, introduced in 1909 by Søren Sørensen as a convenient way of expressing acidity—the negative logarithm of hydrogen ion concentration.Jan 8, 2018
Profession: Chemist
Which formula represents a compound containing three atoms? A) HNO3 B)H2O C)LIF D)ZnSO4
Answer:
c actual contains three atom
Which of the following best explains why the atomic mass on the Periodic Table is a decimal.
What is responsible for the blue sky?
Answer:
Gasses and particles in Earth's atmosphere scatter sunlight in all directions. Blue light is scattered more than other colors because it travels as shorter smaller waves. This it why we see a blue sky most of the time
Explanation:
I looked it up
Answer:
sun shine
Explanation:
A clear cloudless day-time sky is blue because molecules in the air scatter blue light from the sun more than they scatter red light. When we look towards the sun at sunset, we see red and orange colours because the blue light has been scattered out and away from the line of sight.
hhhhhhhhhhhheeeeeeeelpppppp
Answer:
Solar photons
Hope this helps :)
The mouth is a part of what organ system
Answer:
Digestive system
Explanation:
..........
A process by which softer, less weather-resistant rocks wear away and leave harder, more weather-resistant rocks behind is called a. differential weathering. c. chemical weathering. b. mechanical weathering. d. ice wedging.
Answer:
geosphere
Explanation:
Answer:
differential weathering.
Explanation:
1. True or false, phosphorus-33 is an isotope
Explanation:
it's answer is false
hope it helps you
Find the product 78.3 times 0.45
Please help :(
Answer:
35.235
Explanation:
I plugged 78.3x0.45 it into a calculator
please answer; i’ll give brain
Answer:
the answer to this question is option A mark me as brainliest
The gases in a hairspray can are at a temperature of 27 C and a pressure of 30 psi. if the gases can reach a pressure of 90 psi, the can will explode.To what Temperature must the gases be raised in order for the can to explode? You can assume volume remains constant..... please help!!!
The temperature for the can explode : 627 °C
Further explanationGay Lussac's Law
When the volume is not changed, the gas pressure is proportional to its absolute temperature
[tex]\tt \dfrac{P_1}{T_1}=\dfrac{P_2}{T_2}[/tex]
T₁=27 C+273=300 K
P₁=30 psi
P₂=90 psi
[tex]\tt T_2=\dfrac{P_2\times T_1}{P_1}\\\\T_2=\dfrac{90\times 300}{30}\\\\T_2=900~K=627^oC[/tex]
15 POINT..!!! NEED ANSWER ASAP..!!! consider the original wave. which of the four example represents the same sound just much louder?
a). wave a
b). wave b
c). wave c
d). wave d
Answer:
the answer would be wave C
Answer:
C
Explanation:
The taller the wave the louder the sound.
cellular respiration is when what energy from sugar/glucose is converted to cellular
Answer:
The correct answer is - cellular respiration is when chemical energy from sugar/glucose is converted to cellular energy in the form of ATP.
Explanation:
Cellular respiration is a set of metbolic reaction that takes place inside the cell and breaking the sugars or nutrients to convert the chemical energy present in the nutrients into the cellular energy whic is used by cells that is ATP and release water and carbon dioxide as waste.
In this process the ammount of energy store in the cellular currecncy or ATP which is the form of energy that is utilized by the to perform its sunction. The chemical energy that is present in the nutrients or sugar is come from light energy which is stored in the nutrients by photosyntheis process.
The mass of a mole of a substance can be found using the ____ of the substance.
Answer:
mass
Explanation:
Answer:
mass mass mass mass mass
1) Which diagram shows an element?
2) which diagram shows a mixture?
3) which diagram shows a compound?
4)which diagram only shows atoms chemically bonded together?
5) which diagram shows different atoms of matter physically combined together?
Answer:
r
I think 1 option okkkkkkkkkkkkk
Explanation:
mhfs4trfsetc fthcfeencfgeh,cbwjh vbytbnmdtuh3lg dl5flnfwk3t kqre,fvbt,klkkkjh
The simplest structures that can carry out all of the activities characteristic of life are
Answer:
Cells are the simplest structures that can carry out all of the characteristics activities of life.
Explanation:
All living things are made of cells and all cells come from other cells.
How many moles of sulfur trioxide are formed from 3 moles of oxygen using the given
balanced equation?
2 SO. +0,- 2 so.
Answer:
6 moles of SO₃ formed.
Explanation:
Given data:
Number of moles of SO₃ formed = ?
Number of moles of oxygen react = 3 mol
Solution:
Chemical equation;
2SO₂+ O₂ → 2SO₃
now we will compare the moles of oxygen and sulfur trioxide.
O₂ : SO₃
1 : 2
3 : 2/1×3 = 6 moles
Thus, six moles of SO₃ will formed.
(04.03 LC)
Which of the following is used up during cellular respiration?
O Carbon dioxide
O Mitochondria
O Oxygen
O Water
Answer:
Oxygen
Explanation:
Cellular respiration is the metabolic process that involves the breakdown of glucose molecule in order to synthesize energy in form of ATP. However, this cellular respiration can either be aerobic or anaerobic depending on whether oxygen is used or not.
Aerobic cellular respiration is the respiration that involves the use of OXYGEN. It occurs in the mitochondria of the cell, where oxygen is used as the final electron acceptor. Hence, according to the question, OXYGEN is used up during cellular respiration.
Answer:
Oxygen
Explanation:
got it on the test(:
please help out correct answers only
Answer:
Molecular formula = SF₆
Empirical formula is SF₆
Explanation:
Percentage of sulfur = 21.95%
Percentage of fluorine = 78.03%
Molar mass of compound = 146.1 g/mol
Empirical formula = ?
Molecular formula = ?
Solution:
Number of gram atoms of S = 21.95 / 32= 0.69
Number of gram atoms of F = 78.03 / 19 = 4.107
Atomic ratio:
S : F
0.69/0.69 : 4.107/0.69
1 : 6
S : F = 1:6
Empirical formula is SF₆
Molecular formula:
Molecular formula = n (empirical formula)
n = molar mass of compound / empirical formula mass
Empirical formula mass :
32 + 19×6 = 146
n = 146.1 / 146
n = 1
Molecular formula = n (empirical formula)
Molecular formula = 1 (SF₆)
Molecular formula = SF₆
The process of burning a fossil fuel to release energy is called
Answer:combustion
Explanation:
what mineral is least important to plant growth
a. Nitrogen
b. Phosphorus
c. Potassium
d. Sodium
Answer:
sodium
Explanation:
nitrogem, phosphorous and potassium are very important to plant growth, but sodium isnt necessary.
Answer:
the answer is sodium hope this helps
what is the mass of 1.506 x 10^24 atoms of Argon
Answer:
99.90g
Explanation:
1.506 x 10^24atoms × [tex]\frac{1mol}{6.022*10^{23}atoms}[/tex] × [tex]\frac{39.948grams}{1mol}[/tex] = 99.90grams
multiply the atom by constant and by its molar mass
1.506 x 10²⁴ atoms of argons gas is two moles. One mole of argon weighs 35.9 g. Thus mass of two moles of argon is 89.9 g.
What is argon?Argon is 18th element in periodic table. It is placed in 18 the group and it is a noble gas or inert gas with completely filled orbitals. The group members of argon are neon, krypton, xenon and radon.
One mole of every substance contains 6.022 × 10²³ atoms. This number is called Avogadro number. Therefore, one mole of every element contains Avogadro number of atoms. The atomic mass of an element is the mass of one mole of that element.
Mass of one mole of argon is 35.9 g. Thus, it contains 6.022 × 10²³ atoms. Hence, the number of moles that contains 1.506 x 10²⁴ atoms is calculated as follows:
no.of moles = 1.506 x 10²⁴ / 6.022 × 10²³
= 2.5 moles.
The mass of 2.5 moles of argon is 2.5 × 35.9 = 89.9 g. Hence, the mass of 1.506 x 10²⁴ argon atoms is 89.9 g.
To find more about argon, refer the link:
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What type of conservation tillage leaves the greatest amount of soil cover by crop residues? What are the advantages and disadvantages of this system?
Answer:
No-till conservation tillage
Explanation:
No till conservation involves the soil not being touched which gives rise to a large amount of organic matter being left on the surface.
The Advantage of this method is that it helps to prevent erosion such as that of wind and water due to the little or no exposure of the soil surface and helps to provide nutrients to the plants through the organic matter present.
The Disadvantage of this method is its heavy reliance of chemicals such as herbicides in killing the weeds in order to prevent competition for vital compounds with the main plants.
How many Cl atoms are in Zn(ClO3)2?
O A. 2
O B. 1
O c. 3
O D. 6
There are two chlorine band six oxygen atoms in Zn ( ClO₃ )₂ molecule. Therefore, option A is correct.
What is chlorine atom ?With an atomic mass of 35.45 and an atomic number of 17, chlorine has an average of 17 protons, 17 electrons, and 18 neutrons in each of its atoms. Chlorine, which belongs to the halogen family on the Periodic Table, reacts vigorously with metals to produce salts.
Numerous industrial applications exist for chlorine as well. Including the production of plastics like PVC, solvents like tetrachloromethane, chloroform, and dichloromethane, as well as bulk goods like bleached paper products. In addition, it is utilized in the production of paints, textile colors, antiseptics, and pharmaceuticals.
Chlorine is a negative ion because it has a charge of 1, 1 more than protons. Atoms acquire or lose electrons during the formation of ions until their outer energy level is reached.
Thus, option A is correct.
To learn more about chlorine atom, follow the link;
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the outer skin makes the surfboard more expensive. Suggest two reasons why an outer skin is added to the polystyerene core.
(2 marks)
Answer:
It helps it not to break or crack. It is like an outer shell to protect it.
Explanation:
The amount of resistance to a change in motion an object demonstrates is a direct function of its:
Answer:
Newton second law maybe?
How many grams are in 56 L of chlorine gas?
Answer:
Since 1 L equals to 1000 microlitres, and 1 microlitre equals to 1 gram, there are 56 * 1000 = 56000 grams of chlorine gas in 56 L of chlorine gas.
Explanation:
Hope this helped!
what are the difference between an animal cell and plant cell
Answer:
ANIMAL CELL
Animal cells are generally small in size.
They don't have a cell wall
Except the protozoan Euglena, no animal cell possesses plastids.
Vacuoles in animal cells are many, small and temporary.
Animal cells have a single highly complex and prominent Golgi apparatus.
Animal cells have centrosome and centrioles.
PLANT CELL
Plant cells are larger than animal cells.
The plasma membrane of plant cells is surrounded by a rigid cell wall of cellulose.
They have Plastids
Most mature plant cells have a permanent and large central sap vacuole.
Plant cells have many simpler units of Golgi apparatus, called dictyosomes.
Plant cells lack centrosome and centrioles.
Hope this helps!
Answer: Differences between animal and plant cells :
Animal cell :- Animal cells are generally small in size. Cell wall is absent. Except the protozoan Euglena, no animal cell possesses plastids. Vacuoles in animal cells are many, small and temporary. Animal cells have a single highly complex and prominent Golgi apparatus. Animal cells have centrosome and centrioles. Plant cell :- Plant cells are larger than animal cells. The plasma membrane of plant cells is surrounded by a rigid cell wall of cellulose. Plastids are present. Most mature plant cells have a permanent and large central sap vacuole. Plant cells have many simpler units of Golgi apparatus, called dictyosomes. Plant cells lack centrosome and centrioles.
Explanation:
When a substance is changed from a solid to liquid energy is_ _ _ _ d *81 points*
Answer:
That change is known as melting.
Explanation:
I am not sure what you are asking. I hope this helps!
3. What determines that an element is a metal?
Answer:
if it forms from positive ions and has types of metallic bonds
Explanation:
what do you understand by valency electron and valency shell?
Answer:
total no. of electron present in Valency shell is called valency electron ___________________valency shell is that in which last electron is present