Read the list of elements given below.
F, Cl, Br, I
Which of the following about the elements is true?
A. All of them are highly reactive metals
B. All of them are highly reactive nonmetals
C. F and Cl are reactive nonmetals and Br and I are highly reactive metals
D. F and Cl are reactive metals and Br and I are highly reactive nonmetals
Why doesn’t a feather fall at the same rate as an apple?
Balance this equation: Ca(OH)2 +
HCI →
CaCl2
+
H20
Answer:
Double Displacement (Acid-Base)
Explanation:
need done ASAP HELP MEEE
Answer:
1. Heat
2. Temperature
3. convection
4. Conduction
5. Radiation
Before we can analyze the alum crystal it is
necessary to remove any impurities or
uncrystallized ions that may be present in the
sample. Alcohol must be used because alum
is water soluble.
Answer: TRUE
Explanation:
Why is there a difference in the heating rates of land and water?
Which is correct ? I’m really confused
Answer:
A. Florine has a stronger pull than Magnesium
Explanation:
Electronegativity refers to the tendency in which an tom would attract electrons to itself.
Below each element in the periodic table is their electronegativity value. Florine has the highest electronegativity value of 4.0.
Going through options;
A. Florine has a stronger pull than Magnesium
Florine = 4.0
Magnesium = 1.2
This correct
B. Hydrogen has a stronger pull than Phosphorus
Hydrogen = 2.1
Phosphorus = 2.1
This is wrong
C. Potassium has a stronger pull than Sodium
Potassium = 0.8
Sodium = 0.9
This is wrong
D. Iron has a stronger pull than Bromine
Iron = 1.8
Bromine = 2.8
This is wrong
Pls help if you’re good at science I’ll mark brainliest <3
Answer:
B. Extrusive Igneous rock
what is the molar mass of Mg(NO2)2?
Answer:
116g/mol
Explanation:
Mg=24
NO2=46
multiple 46 by 2and then add 24
The molar mass of Mg(NO₂)₂ is 116.33 g/mol.
To calculate the molar mass of Mg(NO2)2, we need to determine the atomic masses of each element in the compound and multiply them by their respective subscripts.
The atomic masses of the elements involved are:
Mg (magnesium) = 24.31 g/mol
N (nitrogen) = 14.01 g/mol
O (oxygen) = 16.00 g/mol
The compound Mg(NO₂)₂ contains one magnesium atom (Mg), two nitrate ions (NO₂), and each nitrate ion contains one nitrogen atom (N) and two oxygen atoms (O).
Molar mass of Mg(NO₂)₂ :
Mg: 1 × 24.31 g/mol = 24.31 g/mol
N: 2 × 14.01 g/mol = 28.02 g/mol
O: 4 × 16.00 g/mol = 64.00 g/mol
Now, add up the individual masses:
24.31 g/mol + 28.02 g/mol + 64.00 g/mol = 116.33 g/mol
Therefore, the molar mass of Mg(NO₂)₂ is 116.33 g/mol.
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How many grams of hydrogen gas are produced if 3.0 moles of magnesium are reacted with excess hydrochloric acid?
Answer k
Explanation: better luck
Write the chemical formula of the following:
(1) Calcium hydroxide.
(2) Magnesium hydroxide.
(3) Aluminum sulphate.
(4) Sodium carbonate.
(5) Zinc phosphate.
(6) Lithium nitrate.
(7) Copper carbonate.
(8) Potassium carbonate.
(9) Magnesium sulphate.
(10) Calcium phosphate.
Answer:
1.Ca(OH)2
2.Mg(OH)2
3.Al2SO4
4.Na2CO3
5.Zn3(PO4)2
6.LiNO3
7.CuCO3
8. K2CO3
9.MgSO4
10.Ca3(PO4)2
****I RLY NEED HELP RN!!! ITS CHEMISTRY AND I AM SOOOO LOST. CAN SOMEONE PLZ PLZ PLZ HELP A GIRL OUT??? I WILL MARK BRAINLIEST, ETC!!!!!
Balance the following chemical equations:
1) AgNO3 + KCl AgCl + KNO3
2) H2O + SO3 H2SO4
3) KI + Cl2 KCl + I2
4) NaHCO3 Na2CO3 + H2O + CO2
5) Zn + HCl ZnCl2 + H2
6) BaCl2 + Na2SO4 BaSO4 + NaCl
Answer:
Explanation:
1. AgNO3 + KCl = AgCl + KNO3
2. SO3 + H2O = H2SO4
3. 2 KI + Cl2 = 2 KCl + I2
4. 2 NaHCO3 = Na2CO3 + CO2 + H2O
5. Zn + 2 HCl = ZnCl2 + H2
6. BaCl2 + Na2SO4 = BaSO4 + 2 NaCl
Answer:
oh no
Explanation:
I would help but I have no clue!!!
I'm so sorry.
Balance the equation Ag2O ->Ag + O2
Answer:
For balancing this equation
we need to put
Ag2O. = 2
Ag = 4
O2 = 1
Hope it will help
The balanced chemical equation of decomposition of silver oxide is 2 Ag₂O -> 4 Ag + O₂.
What is chemical equation?Chemical equation is a symbolic representation of a chemical reaction which is written in the form of symbols and chemical formulas.The reactants are present on the left hand side while the products are present on the right hand side.
A plus sign is present between reactants and products if they are more than one in any case and an arrow is present pointing towards the product side which indicates the direction of the reaction .There are coefficients present next to the chemical symbols and formulas .
The first chemical equation was put forth by Jean Beguin in 1615.By making use of chemical equations the direction of reaction ,state of reactants and products can be stated. In the chemical equations even the temperature to be maintained and catalyst can be mentioned.
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The two basic types of air pollutants are _____.
liquids
invisible
particulates
gases
Answer:
particulates and gases
Explanation:
Learning Task 4: Read the instructions found on the next page. Answer the
questions. Write your answers in your answer sheet..
Answer:
1. yes because it wants to go back to its original spot.
2. the poetical energy turns into kenotic energy and then moves back to the original position
3. it will go back to the original position just different angle
4. same thing as last time goes back to the original position but different angle because of how you are holding the ruler.
Explanation:
How does real-world military CIS compare to its portrayal on television? You can either refer to the agent speaking about it in the video or draw your own conclusions from the video against things you’ve seen on television.
Answer: The video compared to things i've seen on TV seems much more stressful. On TV, they always seem pretty confident in what they are doing, but it never shows the training and how much work you have to go through to get to the end result. They always just take their time walking around and do lots of talking in TV shows when that's not the case at all in this video. It's get in and get out with as much evidence as possible. The TV show always has a successful ending when the hour ends, which is not the case in real life.
write difference between metallic and non metallic minerals
Metallic Minerals will be minerals in which metal components are available in their crude structure. Non-metallic minerals don't contain any metal substances in them. At the point when metallic minerals are dissolved another item is shaped. Non-metallic minerals are frequently discovered installed in youthful overlay mountains and sedimentary rocks.
Why LED is better option for testing the conduction of electricity?
Answer:
Led is a light-emitting diode, a semiconductor diode that glows when a voltage is applied. So, there is always a sure result of whether a substance conducts electricity or not as the light glows. That is why it is a better option for testing conduction of electricity.
Explanation:
which of the following elements has the largest first ionization energy? PLEASE HELP
Answer:
Boron
Explanation:
Hope it helps you......
Answer:
B. Nitrogen
&
D . Boron
Explanation:
both are the element has the largest first ionization energy
Which of Earth's five spheres is involved when a volcano erupts?
Answer:
[;
Explanation:
Mudflows (geosphere) and flooding may occur downstream from volcanoes and may inundate streamside communities (biosphere).
explain why it is more difficult to produce drinking water from waste water than from water in lakes
Answer:
Drinking water can be produced from waste water and from lakes but the difference is in the difficulty of producing water which we can consume.
Drinking water should be clean and toxic free so that if does not affect the human body. Waste water carry more toxic matter in comparison to lake water that's why, producing drinking water from waste water takes more time, expensive and difficult.
So, producing drinking water from waste water is more difficult as it require the removal of more toxic matter than water in lakes.
If I have 3.45 x 1024 molecules of sucrose, how many moles of sucrose do I have?
Answer:
3532.8
Explanation:
is a mirror transparent, translucent, or opaque?
well i just had a major PTSD attack how is everyone i need to think about something else
Answer:
Oh so so sorry about that. and thanks for caring for us. anyway we are good wbu
Explanation:
im good. i just ate applesauce lol :)
A worker paints a 5.2 foot wide crosswalk on a street her boss tells her to make crosswalk 1.25 foot
The question is incomplete. The complete question is :
A worker paints a 5.2 foot wide crosswalk on a street her boss tells her to make crosswalk 1.25 feet wider. How wide is the finished crossroad ?
Solution :
It is given that the worker paints a crossroad on a street whose width is = 5.2 feet.
The boss of the worker asks the worker to make the width of the cross road 1.25 feet more wider.
Thus the required width of the cross road is = 5.2 feet + 1.25 feet
= 6.45 feet.
Therefore the finished cross road is = 6.45 feet wide.
When the zinc atom breaks its bonds with chlorine to make bonds with copper, is it a chemical or physical change?
Answer: it is a chemical change
Explanation:
The 2s orbital is at n=2. *
True
False
Answer:
Try true
Explanation:
But note I'm not sure
Explanation:
it is true
hope I helped you!! :))
A skateboarder coasts a distance of 20 meters in 4 seconds. What is the person's speed?
Answer:
5
Explanation:
20/4
In what situation does water undergo a physical change?
Answer:
There are actually two.
Explanation:
When water freezes it turns to ice however it still has the molecular properties of water. Same thing when it evaporates.
7. A small stone added to boiling liquids to make them boil more evenly without sudden violent releases of
vapours are called
Answer:
A boiling chip, boiling stone, porous bit or anti-bumping granule is a tiny, unevenly shaped piece of substance added to liquids to make them boil more calmly.
These help in making the liquid boil more easily
Answer:
umm i think it's called boiling chip
