What is the average time it took for the tablet to
dissolve in cold water?
Answers
Answer:
It might take 20-30 seconds to dissolve in water
Explanation:
Related Questions
The transition metal with the smallest atomic mass
Calculate the number of atoms in 4g of bromine molecule.(Br).(avogadro 's constant =6.02 x 10²³ mol-¹; Br=80)
The cheetah has been clocked at 112 km/Hr. What speed would this be in ft/sec?
Only smart people are allowed to answer ONLY smart people............... If you can answer this correctly then maybe you are actually yourself!!!Fill in the blanks: ______ compounds break up into ______ and ______ in solution, which can move freely and carry an _______ current.
Answers
1 mol ------ 39.948 g
mol ----- 20.0 g
mol = 20.0 * 1 / 39.948
= 0.5006 moles
1 mol --------------------- 22.4 L ( at STP )
0.5006 moles ------------- L
L = 0.5006 * 22.4
= 11.21 L
hope this helps!
B) noble gases
C) alkali earth metals
D) alkaline earth metals
Answers
The most stable because they can contain the most valence electrons in their outer shell. The correct option is B.
Thus, The group of elements on the periodic table known as noble gases, commonly referred to as inert gases, is thought to be the most stable.
They are radon (Rn), krypton (Kr), xenon (Xe), neon (Ne), helium (He), and argon (Ar). Noble gases are extremely stable and less likely to combine chemically with other elements because they contain entire valence electron shells.
Their full electron configurations, which result in low reactivity, are the cause of this stability.
Thus, The most stable because they can contain the most valence electrons in their outer shell. The correct option is B.
Learn more about Valence electrons, refer to the link:
#SPJ3
Most stable because they have the maximum number of valence electrons their outer shell can hold
Answers
Answer: 7.6 g of water are required to make 12.6 g of glucose
Explanation:
Moles is calculated by using the formula:
The balanced chemical equation is:
According to stoichiometry:
1 mole of glucose is produced by = 6 moles of water
Thus 0.07 moles of glucose is produced by = moles of water
Mass of water required =
Thus 7.6 g of water are required to make 12.6 g of glucose
Captionless Image
10.0g
22.1g
32.9g
5.6g
Answers
Answer:
22.1 g
Explanation:
The balanced reaction equation which serves as a guide in solving the problem is given as;
CaO(s) + 2NaCl(aq) ------> Na2O(s) + CaCl2(aq)
The question clearly specifies that sodium chloride is the reactant in excess. This means that calcium oxide should be used to calculate the theoretical yield of sodium oxide.
Number of moles of calcium oxide reacted = mass of calcium oxide / molar mass of calcium oxide
Molar mass of calcium oxide = 56.0774 g/mol
Mass of calcium oxide = 20.0g
Number of moles of calcium oxide = 20.0 g/ 56.0774 g/mol = 0.3566 moles
From the balanced reaction equation;
1 mole of calcium oxide produces 1 mole of sodium oxide
Therefore, 0.3566 moles of calcium oxide will produce 0.3566 moles of sodium oxide.
Mass of sodium oxide produced = number of moles × molar mass
Molar mass of sodium oxide= 61.9789 g/mol
Mass of sodium oxide = 0.3566 moles × 61.9789 g/mol
Mass of sodium oxide= 22.1 g
Answer:
22.1g
Explanation:
We'll begin by writing the balanced equation for the reaction. This is given below:
CaO + 2NaCl —> Na2O + CaCl2
Next, we shall determine the mass of CaO that reacted and the mass of Na2O produced from the balanced equation.
This is illustrated below:
Molar mass of CaO = 40 + 16 = 56g/mol
Mass of CaO from the balanced equation = 1 x 56 = 56g
Molar mass of Na2O = (23x2) + 16 = 62g/mol
Mass of Na2O from the balanced equation = 1 x 62 = 62g
From the balanced equation above,
56g of CaO reacted to produce 62g of Na2O.
Finally, we can determine the theoretical yield of Na2O as follow:
From the balanced equation above,
56g of CaO reacted to produce 62g of Na2O.
Therefore, 20g of CaO will react to produce = (20 x 62)/56 = 22.1g of Na2O.
Therefore, the theoretical yield of Na2O is 22.1g
B. marble
C. copper
D. steel
Answers
Answer: Option (B) is the correct answer.
Explanation:
Marble is also known as calcium carbonate and its chemical formula is .
When it combines with vinegar then it results in the formation of calcium acetate which is a water soluble compound along with the release of carbon dioxide which occurs in the form of bubbles and water.
The reaction is as follows.
Whereas vinegar being a weak acid will not react with glass, copper and steel.
Answer: B
Explanation: I got it right on my test
Brainliest?
Answers
Answer:
the answer is adaptations
Explanation:
A body part or behavior that helps an animal meet its need in its environment is called an adaptation. All adaptions are inherited traits. Camouflage is an animal's color or pattern that help it blend in with its surroundings.