Answers
Answer:
It's b
Explanation:
I had the same exact question
Related Questions
write down the uses of periodic table।
Answers
Answer:
the uses of periodic table is we can classify the elements in different groups.I think.
Answer:
the list is endless so those are some of them but I am sure there are more.
Explanation:
everyone feel free to add
True or false..
(A) Burning of magnesium ribbon is physical change
Answers
Answer:
False because it is chemical change
hii pls help me to balance the equation and state the symbols thankss
Answers
Answer:
H2 + CuO======Cu + H2O
Explanation:
Cu is copper
H is hydrogen
H2O is water
O is oxygen
CuO is copper 11 oxide
Answer:
[tex]{ \bf{H _{2(g)} + CuO _{(s)} → Cu _{(s)} + H _{2} O _{(g)} }}[/tex]
It's balancing, hope it helps
which of the following statements is true about alkali?
A) bases that soluble in water
B) shows a pH value less than 7
C) Ionises in water to form hydroxonium ions
D) Reacts with carbonate salt to release carbon dioxide gas
Answers
Answer:
it should be letter c
Explanation:
I hope this help
why mixture of stone pebbles And water is concerned considered suspension you are provided with a mixture of sand salt and camphor how would you separate these particles explain in detail
Answers
Answer:
camphor sublimates salt is soluble in water while sand does not sublime and does not dissolve in water you first heat the mixture in a beaker covered with a watch glass camphor will then accumulate on the watch glass then you dissolve the remaining mixture of sand and salt salt will dissolve forming a salt solution then you filter using a filter paper and a beaker the residue on the filter paper is sand while the filtrate is salt solution you then heat the salt solution so that it can evaporate leaving salt particles thus you will have obtained salt sand and camphor
Aluminum hydroxide containing medicine is used for gastric why
Answers
Answer:
Aluminum Hydroxide, Magnesium Hydroxide are antacids used together to relieve heartburn, acid indigestion, and upset stomach. They may be used to treat these symptoms in patients with peptic ulcer, gastritis, esophagitis, hiatal hernia, or too much acid in the stomach (gastric hyperacidity).
Answer:
wow it's a very nice question
Which of the following elements will most likely not form an ion at all?
Br
Na
O
Ar
Mg
Answers
Answer:
О
because it has the fewest number of electrons
Three Balanced equations for Ammonium salt+Alkali=Salt+water+carbon dioxide
Answers
Answer:
NH₄Cl (aq) + NaOH (aq) -> NaCl (aq) + H₂O (l) + NH₃ (g)
(NH₄)₂CO₃ (aq) + 2KOH (aq) -> K₂CO₃ (aq) + 2H₂O (l) + 2NH₃(g)
NH₄NO₃ (aq) + LiOH (aq) -> LiNO₃ (aq) + H₂O (l) + NH₃ (g)
Explanation:
The gas liberated when an alkali reacts with an ammonium salt is NH₃ (ammonia), not CO₂.
What is the mass of the block of iron that has 10 cm 5 cm and 2 centimeters
Answers
Answer:
787.4g
Explanation:
The dimensions of the iron block is given as follows;
L = 10cm, B = 5cm, H = 2cm
Volume = L × B × H
Volume = 10 × 5 × 2
Volume = 100cm³
Density of iron metal = 7.874 g/cm³
Using the formula;
Density = mass/volume
Mass = density × volume
Mass = 7.874 × 100
Mass of iron = 787.4g
Is it possible to prepare chlorine in lab without application of heat?
Answers
Answer:
i think it will explode
Give reasons. a. Troposphere is affected maximum by human activities.
Answers
Answer:
it is where the ozone layer is locate which is affected by human activities
What is the aim of cleaning of the iron nails before doing the experiment?
Answers
A bedroom that measures 11 ft by 12 ft by 8.0 ft contains 35.41 kg of air at 25 C. What is the pressure of the air in the room? You may assume that the molar mass of air is 29.0 g/mole.
Answers
Answer:
9.97×10⁻⁴ atm
Explanation:
Applying,
PV = nRT............... Equation 1
Where P = pressure, V = volume, n = number of moles of air, R = molar gas constant, T = Temperature.
make P the subject of the equation
P = nRT/V............ Equation 2
From the question,
Given: V = (11×12×8) ft³ = 1056 ft³ = (1056×28.3168) = 29902.5 L, T = 25°C = (25+273) = 298 K, n = 35.41/29 = 1.22 mole
Constant: R = 0.082 atm.L/K.mol
Substitute these values into equation 2
P = 1.22×0.082×298/29902.5
P = 9.97×10⁻⁴ atm
why is the Dna molecule able to open up and close?
Answers
Answer:
The breaking of the hydrogen bonds due to the force relieves the torsional stress stored in a double helix. As a result, the nucleotide strands rotate more freely about the axis of a helix and start unwinding. ... The DNA unzipping and the DNA unwinding result in a structural transformation from dsDNA to ssDNA.
Oxide of nitrogen that is acidic
Answers
Answer:
Nitrogen oxides are used in the production of nitric acid, lacquers, dyes, and other chemicals. Nitrogen oxides are used in rocket fuels, in the nitrification of organic chemicals, and in the manufacture of explosives.
Explanation:
Determinar el volumen de 20 kg de benceno si su densidad es de 0,88g/cm3
Answers
Answer:
volume = mass/ densidad
0.88g/cm3 = 880kg/m3
v=20kg/880kg/m3
v=0.02272727272
o puede ser 0.0227
o tambien puede ser 0.023
What word chemical equation describes Cavendish’s experiment with zinc?
WILL GIVE BRANLIEST !!!!!!!!!!!!!!!!!!
Answers
Answer:
The reaction between zinc and HCl is given by the symbolic equation
Zn + HCl → ZnCl2 + H2.
30 POINTS!! Will mark brainliest if correct answer and all work is shown! What mass in grams of tin would be required to completely react with 1.30 L of 0.750 M HBr in the following chemical reaction? Sn(s) + 4 HBr(aq) → SnBr₄ (aq) + 2 H₂ (g)
Answers
Answer:
mSn=0.24375*59=14.38125
Explanation:
nHBr=1.3*0.75=0.975
nSn=1/4nHBR=0.975/4=0.24375
mSn=0.24375*59=14.38125
which statement best describes a chemical property of a mineral
Answers
Answer:
The mineral forms gas bubbles when a sample is stored in water
The volume of a 76.52 g sample of methane gas is 32.7 L at 26.9 °C and 4.45 atm. What will its volume be at 95.4 °C and 1.7 atm?
Answers
Answer:
The volume of a 76.52 g sample of methane gas is
32.7 L at 26.9 °C and 4.45 atm. What will its volume be at 95.4 °C and 1.7 atm?
2HNO3+ Cu O -> Cu (NO3)2 + H₂O
Answers
Answer:
it is already balanced bro
How many electrons are in an ion of sulfur (82)?
The Periodic Table
O A. 2
B. 16
O
C. 8
D. 18
Answers
Answer:
B 16
Explanation:
the atomicnumber =protons of the atom =electrons do keep in mind that they are charged negatief
Which of the following is an example of applied research?
a. Developing a way to remove dangerous chemicals from water.
b. Looking for life on distance planets
C. Studying how radiation effects humans.
d. Studying how listening to music affects your mood.
Answers
.A.
Explanation:
The example of applied research to developing a way to remove dangerous to chemical resources from chemical water
Mass of A = 320 g
Volume of A= 64 cm3
A
Density of B = 3 g/cm3
Volume of B = 27 cm3
(Not drawn to scale)
11
22. What is the density of cube A?
A) 0.2 g/cm3 B) 5.0 g/cm3
C) 12.8 g/cm D) 64.0 g/cm3
Answers
Answer:
Mass of A=320g
Volume of A=64cm3
Density of B =3g/cm3
Volume of B = 27 cm3
(Not drawn to scale)
and the density of cube A =5.0g/cm3
Please mark me a brainlist
The density of the object that has been labelled as A from the calculation is 5.0 g/ [tex]cm^3[/tex]. Option B
What is the density?
Density is a physical property of matter that measures how much mass is contained within a given volume.
Density is a fundamental property of matter that describes how mass is distributed within a given volume. It is a useful parameter in various scientific, engineering, and everyday applications.
We know that;
Density = Mass/Volume
= 320 g/64 [tex]cm^3[/tex]
= 5.0 g/ [tex]cm^3[/tex] as seen here
Learn more about density:https://brainly.com/question/29775886
#SPJ3
Which of the following is an example of a molecule?
A. A sodium atom forms a metallic bond with another sodium atom.
B. A hydrogen atom forms a covalent bond with a chlorine atom.
C. A sodium atom forms an ionic bond with a chlorine atom.
D. A sodium atom forms a metallic bond with another sodium atom.
Answers
Answer:
The answer is B. A hydrogen atom forms a convalent bond.........
Explain whether changing the ratio of baking soda and vinegar changes the amount of carbon dioxide produced. Include the evidence you used to reach your conclusion.
Answers
On changing the ratio of baking soda and vinegar changes the amount of carbon dioxide produced is true, because each species will depends on both reactants.
What is chemical reaction?Chemical reactions are those reactions in which reactants are mixed with each other for the formation of new product.
Chemical reaction between baking soda and vinegar is shown below in the attached image in which the formation of carbon dioxide, water and sodium acetate takes place. So the formation of carbon dioxide depends on the baking soda and baking soda reacts with vinegar to form sodium acetate so change in the ratio will changes the amount of carbon dioxide.
Hence on changing the ratio of reactants and vinegar changes the amount of carbon dioxide.
To know more about chemical reactions, visit the below link:
https://brainly.com/question/26018275
Answer:
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
Answers
Explanation:
i dont know 8th and i am not sure baout carbonic acid in 10 th but they are balanced
Which of the following oxides is amphoteric oxide?
A)Na2O
B)Al2O3
C)MgO
D)SO2
Answers
Answer:
absolutely B because Al2O3 could react with axit and bazo
Explanation:
Answer:
"Aluminum oxide, beryllium oxide, tin oxide, zinc oxide all are amphoteric. They have reactions as both a base and an acid."
Explanation:
6c.Calculate the maximum volume, in dm3, of chlorine gas at Stp that can be obtained from 23.4 tonnes of molten sodium chloride. 1 tonne= 10^6 Mr of NaCl=58.5 molar volume of chlorine at stp= 24dm3 Give your answer in standard format.
Answers
Answer:
4.48×10⁶ dm³
Explanation:
We'll begin by converting 23.4 tonnes to grams (g). This can be obtained as follow:
1 tonne = 10⁶ g
Therefore,
23.4 tonnes = 23.4 × 10⁶
23.4 tonnes = 2.34×10⁷ g
Thus, 23.4 tonnes is equivalent to 2.34×10⁷ g
Next, we shall determine the number of mole in 2.34×10⁷ g of NaCl. This can be obtained as follow:
Mass NaCl = 2.34×10⁷ g
Molar mass of NaCl = 58.5 g/mol
Mole of NaCl =?
Mole = mass / molar mass
Mole of NaCl = 2.34×10⁷ / 58.5
Mole of NaCl = 4×10⁵ moles
Next, we shall determine the number of mole of chlorine, Cl₂ produced from the reaction. This can be obtained as follow:
2NaCl —> 2Na + Cl₂
From the balanced equation above,
2 moles of NaCl reacted to produce 1 mole of Cl₂.
Therefore, 4×10⁵ moles of NaCl will react to produce = (4×10⁵ × 1)/2 = 2×10⁵ moles of Cl₂.
Thus, 2×10⁵ moles of Cl₂ were obtained from the reaction.
Finally, we shall determine the volume of Cl₂ produced. This can be obtained as follow:
1 mole of Cl₂ at stp = 22.4 dm³
Therefore,
2×10⁵ moles of Cl₂ at stp = 2×10⁵ 22.4
2×10⁵ moles of Cl₂ at stp = 4.48×10⁶ dm³
Thus, the volume of chlorine obtained from the reaction is 4.48×10⁶ dm³
help pls I really need the answer I will brainlest
Answers
Answer:
Latitude: the angular distance of a place north or south of the earth's equator, or of a celestial object north or south of the celestial equator, usually expressed in degrees and minutes. (Left to right)
Longitude: the angular distance of a place east or west of the meridian at Greenwich, England, or west of the standard meridian of a celestial object, usually expressed in degrees and minutes. (Up and down)
