Answer:
electrons get transfered from metals to non metals in the formation of ionic bond.
metals have the tendency to lose electrons whereas non metals tend to stabilize by gaining electrons.
Answer the questions about the characteristics of the elements in group 1 (the alkali metals). What happens when the elements in group 1 react with bromine? No reaction a salt is formed with the general formula MBr2 a salt is formed with the general formula MBr What happens when the elements in group 1 react with water? Hydrogen gas is released no reaction What happens when the elements in group 1 react with oxygen? No reaction an oxide is formed with the general formula MO an oxide is formed with the general formula M2O Which group 1 element reacts the most vigorously? Na Rb Li K Cs Which group 1 element exhibits slightly different chemistry from the others? Li Na Cs K Rb
Answer:
See explanation
Explanation:
The elements in group form univalent positive ions and element in group 17 form univalent negative ions. Hence, when a group 1 element reacts with a group 17 element, a compound of the sort MX is formed. Hence, when a group 1 element reacts with bromine, a salt is formed with the general formula MBr.
Elements of group 1 are highly electro positive metals. They react with water to form the metal hydroxide and release hydrogen gas. Hence, when group 1 elements react with water, hydrogen gas is released.
A group 1 element forms a univalent positive ion while a group 16 element forms a divalent negative ion. Hence, when a groups 1 element reacts with oxygen, the compound formed must have the general formula M2O.
The reactivity of group 1 metal increases down the group hence Cs is the most reactive group 1 element.
Lithium displays a slightly different chemistry from other group 1 elements because of its small size.
What is Rin the ideal gas law equation?
A. The kinetic energy of the gas
B. The molar mass of the gas
C. The number of moles of the gas
D. The ideal gas constant
Answer:
R is the ideal gas constant
Identify the principle of separation.
i. raw rice and lentils
ii. sulphur and iron filings
ii. sand and sawdust
iv. oil and water
v. ammonium chloride, salt and sand
Explanation:
I. husking
ii. use magnet
III. husking
iv. floatation
v. Fractional distillation
How many liters of Cl2 gas will you have if you are using 63 g of Na?
Answer:
You will have 19.9L of Cl2
Explanation:
We can solve this question using:
PV = nRT; V = nRT/P
Where V is the volume of the gas
n the moles of Cl2
R is gas constant = 0.082atmL/molK
T is 273.15K assuming STP conditions
P is 1atm at STP
The moles of 63g of Cl2 gas are -molar mass: 70.906g/mol:
63g * (1mol / 70.906g) = 0.8885 moles
Replacing:
V = 0.8885mol*0.082atmL/molK*273.15K/1atm
V = You will have 19.9L of Cl2
Which substances are the products in the equation below?
Answer:
CO2 AND H2O are the products of the following reaction
Check all that indicate a chemical change. Check all that apply. Group of answer choices aqueous solutions of silver nitrate and sodium chloride turn cloudy after mixing aqueous solutions of hydrochloric acid and sodium hydrogen carbonate produces bubbles on mixing Sodium hydroxide is mixed with water and the container feels warmer Water is added to orange juice is the color becomes lighter. No answer text provided. ice melts on a bench top at room temperature
Answer:
aqueous solutions of silver nitrate and sodium chloride turn cloudy after mixing aqueous solutions of hydrochloric acid and sodium hydrogen carbonate produces bubbles on mixing Sodium hydroxide is mixed with water and the container feels warmer
Explanation:
A chemical change involves the formation of new substances. Also heat is absorbed or released in a chemical change. Another name for a chemical change is a chemical reaction.
In the first case, a reaction of the sort;
AgNO3(aq) + NaCl(aq) ---> AgCl(s) + NaNO3(aq)
The cloudy solution is due to the formation of AgCl precipitate.
In the second case, a reaction of the sort;
HCl(aq) + NaHCO3(aq) ---> NaCl(aq) + CO2(g) + H2O(l)
The gas evolved is due to the formation of CO2 in the process. Heat is also evolved showing that it is a chemical change.
Copper sulfate is a soluble salt that can be made from copper oxide and which acid?
Answer:
Sulfuric acid
Explanation:
what happens when two of the atoms get close together in javalab ionic bond simulation? (I've been messing with this thing for a hour and I still dont get what's happening)
WHAT IS AN Ionic bond
[tex] {\orange { \mathbb{ \huge{QUESTION}}}}[/tex]
WHAT IS AN IONIC BOND
[tex]\huge\boxed{\fcolorbox{red}{blue}{ ANSWER }}[/tex]
[tex] \orange{\underline{\huge{\bold{\textit{\green{\bf{Ionic \:Bond}}}}}}}[/tex]
kossel explained that inert gases r inert due to the electronic configuration which contains 8 electrons in their outermost shell
And other elements loss and gain electrons to form ions and to have electronic configuration same as Noble gas and to get stable
[tex]Hope\: it \:is\: helpful[/tex]
[tex]Mark \:as\: the\: brainlist\: ans\: with \:thanks... [/tex]
#SARDAR JI.
Answer:
An ionic bond is a chemical bond that results from electrostatic attraction between positive and negative ions.
Explanation:
It occurs between a metal and a non-metal, and the electronegativity will always be greater than 1.7 (which are both expedient ways of identifying this type of reaction). I hope this helps!
Why might having mud in an ecosystem be important?
Mud can replace producers in an ecosystem.
Pigs love to wallow in mud.
Mud can replace consumers in an ecosystem.
An insect needs mud wallows to breed; that insect pollinates several flowers in that ecosystem.
plsssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssss answer with one of the options
An insect needs mud wallows to breed; that insect pollinates several flowers in that ecosystem.
Having mud in an ecosystem is important because Insects are very important as primary or secondary decomposers in the ecosystem. These insects need mud wallows to breed. That insect pollinates several flowers in that ecosystem.
Why do insects like mud?Muddy sediments recycle organic matter back into nutrients for plant photosynthesis. Butterflies and other insects search for moisture, salt, and other nutrients. It's not just damp patches of soil that draw butterflies. Some are attracted by wet sand and dung.An insect needs mud wallows to breed.How do insects play an important role in the ecosystem?Insects like Bees are some of the most important pollinators in the ecosystem.Without bees, most of the plants we rely on would not be able to produce most of the food we eat.Therefore, the mud in an ecosystem is most important as it provides a place for insects to breed and these insects play a major role in the ecosystem like pollination.
Learn more about insect pollination here:
https://brainly.com/question/11204416
#SPJ2
Blank moles of carbon dioxide are required to make 7.2 moles of glucose. A plant using 618 grams of carbon dioxide and plenty of water can make
Answer:
43.2 moles of carbon dioxide are required and 421g of glucose could be produced
Explanation:
Based on the reaction:
6CO2 + 6H2O → C6H12O6 + 6O2
1 mole of glucose, C6H12O6, requires 6 moles of carbon dioxide. 7.2moles of glucose requires:
7.2mol C6H12O6 * (6mol CO2 / 1mol C6H12O6) =
43.2 moles of carbon dioxide are required618g of CO2 -Molar mass: 44.01g/mol- are:
618g * (1mol / 44.01g) = 14.04moles CO2
Moles C6H12O6:
14.04moles CO2 * (1mol C6H12O6 / 6mol CO2) = 2.34moles C6H12O6
Mass glucose -Molar mass: 180.156g/mol-
2.34moles C6H12O6 * (180.156g / mol) =
421g of glucose could be producedIf 18.5 grams of CuCl2 react with 22.8 grams of NaNO3, what mass of NaCl can be formed?
CuCl2 + NaNO3 → Cu(NO3)2 + NaCl
12.4 g NaCl
15.7 g NaCl
16.2 g NaCl
28.4 g NaCl
Answer:
From above calculations, gives the limited amount of NaCl. So, 15.7 g of NaCl would form from given amounts of reactants.
Explanation:
thank me later
Name the fundamental unit involved in the derived unit joule?
Answer:
Energy
Explanation:
Question 5 of 5
Which item is not important to have in order to be prepared for an
earthquake?
A. First aid kit
B. Fresh vegetables
C. Flashlight
D. Blankets
PLEASE ANSWER ASAP!!!
Answer:
probably fresh vegetables
Explanation:
cause it consumes off the ground
Se tiene una solución acuosa 2M de carbonato de potasio. Expresar su concentración en %p/v y Normalidad.
Answer:
Normalidad = 4N
%p/V = 27.6%
Explanation:
La solución 2M de carbonato de potasio contiene 2moles de carbonato por litro de solución. La normalidad son los equivalente de carbonato de potasio (2eq/mol) por litro de solución:
2moles * (2eq/mol) = 4eq / 1L = 4N
El porcentaje peso volumen es el peso de carbonato en gramos dividido en el volumen en mL por 100:
%p/V:
Masa K2CO3 -Masa molar: 138.205g/mol-
2moles * (138.205g/mol) = 276g K2CO3
Volumen:
1L * (1000mL/1L) = 1000mL
%p/V:
276g K2CO3 / 1000mL * 100
%p/V = 27.6%What is the limiting reactant when 19.9 g CuO react with 2.02 g H2?
Answer:
Explanation:
use the equation
moles = mass/mr
=19.9/79.5
=0.250moles of CuO
then do the same for
H = 2.02/1
=2.02
so CuO is the limiting reagent because there is less amount of it.
Hope this helps :)
What is the product of the unbalanced combustion reaction below?
C4H10(g) + O2(g) →
A. C(s) + H2O(9)
B. C6H1206(s)
C. CO2(g) + H20(9)
D. CO2(g) + H2(9)
Answer:
C
Explanation:
because it is complete combustion so it will produced CO2 +H2O :)
how many moles of hydrogen ions are present in a 2L solution with a pH of 2.75
We are given:
Volume = 2 L
pH = 2.75
Finding the concentration required:
we know that pH is just the negative log of the hydrogen ion concentration
pH = -log[H⁺]
we are given that the pH is 2.75
2.75 = -log[H⁺]
log[H⁺] = -2.75 [multiplying both sides by -1]
[tex]10^{log[H]} = 10^{-2.75}[/tex]
[H⁺] = 1.78 * 10⁻³ Molar
Number of moles of Hydrogen ions:
[H⁺] = 1.78 * 10⁻³ Molar
which means that there are 1.78 * 10⁻³ moles of hydrogen ions in 1 liter solution
1.78 * 10⁻³ moles / L
multiplying and dividing by 2, we get:
3.56 * 10⁻³ moles / 2 L
Hence we need 3.56 * 10⁻³ moles of hydrogen ions
Answer:
3.556x 10^-3mol
Explanation:
Using pH =-log [ H+], we can calculate the concentration of the hydrogen Ions.
pH =-log [ H+], pH = 2.75
2.75 = -log[H+], taking antilog of both sides
10^ — 2.75 = [H+]
[H+] =1. 778 x 10^-3M
Now that we have the concentration and also knows the volume, we can use the relation
Moles = concentration X volume
= 1. 778 x 10^-3M x 2L = 3.56x 10^-3mol
The moles of the hydrogen Ions is 3.56x 10^-3mol
How many kilograms of oseltamivir would be needed to treat all the people in a city with a population of 400000 people if each person consumes two oseltamivir capsules a day for 5 days? Express your answer to one significant figures and include the appropriate units.
Oseltamivir, C16H28N2O4, is a drug that is used to treat influenza. The preparation of oseltamivir begins with the extraction of shikimic acid from the seedpods of star anise. From 2.6 g of star anise, 0.13 g of shikimic acid can be obtained and used to produce one capsule containing 75 mg of oseltamivir. The usual adult dosage for treatment of influenza is two capsules of oseltamivir daily for 5 days.
Answer:
300 kg
Explanation:
The number of people in the city, p = 400,000
The number of capsules of oseltamivir each person consumes per day, n = 2 capsules
The number of days each person consumes the oseltamivir capsules, t = 5 days
The mass of oseltamivir in each capsule, m = 75 mg
The mass of oseltamivir needed to treat all the people in the city, M, is given as follows;
M = n·t·m·p
∴ M (in milligrams) = (2 × 5 × 75 × 400,000) mg = 300,000,000 mg
1,000,000 mg = 1 kg
∴ 300,000,000 mg = 300 kg
The mass of oseltamivir needed to treat all the people in the city, M = 300 kg
what would be the formula for ethane?
Answer:
C₂H₆
Explanation:
The formula for ethane is C₂H₆
Which of the following is True about nitrogen -14 and nitrogen -16
A, They are completely different Atoms
B, they are the exact same atom
C, they are the same except that carbon -14 has 2 extra electrons
D, they are isotopes of the same atom
Question 27
How many molecules are in 28 g of CO2?
O 3.5 x 10-21
O 7.42 x 1026
3.83 x 1023
O 3.8 x 1044
Answer:
3.83x10^23
Explanation:
number of moles of co2 is 0.636364
but number of molecules = number of moles times 6.02x10^23
How many grams of Potassium are in 10 moles of potassium?
Answer:
You can view more details on each measurement unit: molecular weight of Potassium or grams The molecular formula for Potassium is K. The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles Potassium, or 39.0983 grams.
Explanation:
Help pleaseeee
you wish to make a potassium carbonate solution with a molar concentration of 0.25mol/dm³,but you only have 11.7g of potassium carbonate. what is the maximum volume of solution you can make?
Answer:
0.337 dm³
Explanation:
M(K2CO3) = 138.2 g/mol
1) 11.7 g * (1 mol/138.2 g) =0.08466 mol
2) 0.08466 mol * (1 dm³/0.25 mol) = 0.3386 dm³ ≈ 0.337 dm³
A sample of carbon tetrachloride (CCI) contains 3 moles of the substance. How many atoms are there in the sample?
O 1.806 x 1024
05
0 15
O 9.03 x 1024
Answer:
Number of atoms =1.806×10²⁴
Explanation:
You have the number of moles of Carbon tetrachloride which is n=3
And you are looking for number of atoms that are in the sample, which are represented by the letter "N"
The formula that has both number of moles(n) and number of atoms(N) is written as n=N/Na
Na is called the Avogadros number and it is equal to 6.08×10²³, it never changes(it is a constant)
So you will substitute the number of moles and the avogadros number to you formula, and the only unknown will be the number of atoms which you are looking for
n=N/Na3=N(6.02×10²³)N=1.806×10²⁴ atoms of CClNB: N does not represent the number of atoms only. It may also represent the number of particles or molecules...
What is a gas’s temperature in Celsius when it has a volume of 25 L, 203 mol, 143.5 atm?
To Find :
Gas’s temperature in Celsius when it has a volume of 25 L, 203 mol, 143.5 atm .
Solution :
We know, by ideal gas equation :
[tex]PV =nRT\\\\T = \dfrac{PV}{nR}[/tex]
Here, R is universal gas constant and [tex]R = 0.082 \ L \ atm \ mol^{-1} \ K^{1}[/tex]
Putting all given values and R in above equation, we get :
[tex]T = \dfrac{PV}{nR}\\\\T = \dfrac{143.5\times 25}{203 \times 0.082}\ K\\\\T = 215.52\ K[/tex]
Hence, this is the required solution.
Answer quickly please
How much voltage is required to run 0.5 A of current through a 50-ohm resistor? Use V = IR
Answer:
The answer is 10
For the reaction, Cl2 + 2KBr --> 2KCl + Br2, how many moles of potassium chloride, KCl, are produced from 102g of potassium bromide, KBr (MM: 119.002 g/mol)?(answer has 3 decimal places)
Solution :
From the balanced chemical equation, we can say that 1 moles of KBr will produce 1 moles of KCl .
Moles of KBr in 102 g of potassium bromide.
n = 102/119.002
n = 0.86 mole.
So, number of miles of KCl produced are also 0.86 mole.
Mass of KCl produced :
[tex]m = 0.86 \times Molar \ mass \ of \ KCl\\\\m = 0.86 \times 74.5 \ gram \\\\m = 64.07\ gram[/tex]
Hence, this is the required solution.
current electricity occurs naturally(true or false)
Answer:
True
Explanation:
An experiment requires a solution of 60 % ethanol by volume. What volume of alcohol should be added to make a 200 mL of this solution?
Answer: 120 mL of ethanol must be added.
Explanation:
We are given:
60% ethanol by volume
This means that 60 mL of ethanol is present in 100 mL of solution
Given volume of solution = 200 mL
Applying unitary method:
If 100 mL of solution contains 60 mL of ethanol
So, 200 mL of solution will contain = [tex]\frac{60}{100}\times 200=120mL[/tex] of ethanol
Hence, 120 mL of ethanol must be added.