Answers
Related Questions
copper sulphate solution turns the colour of litmus into red but litmus changes into blue with baking soda solution although both are salts. Give reason why?
Answers
Answer:
Copper sulphate is an acidic salt: It is the product of the reaction between a weak copper base and a strong acid , H2SO4
Litmus has a red colour in acidic solutions:
Conclusion: Acidic copper sulphate solution turns blue litmus to red
Baking soda is a basic salt : It is the reaction product of a weak acid , CO2 and a strong base , NaOH
Litmus has a blue colour in basic solutions:
Conclusion: basic baking soda solution turns red litmus to blue
What volume of ammonia (NH3) will react completely with 25.0 liters of O2? 4 NH3 + 3 O2 ---> 2 N2 + 6 H2O
Answers
Answer:
18,75 litres
Explanation:
4 NH3 + 3 O2 ---> 2 N2 + 6 H2O
n (NH3) : n (O2) = 4 : 3
<=>
V (NH3) : V (O2) = 4 : 3
Hence, V(O2) = 3 × V (NH3) ÷ 4 litres
V(O2) = 3 × 25.0 ÷ 4 litres
V(O2) = 75 ÷ 4 litres
V(O2) = 18,75 litres
If you have any questions, feel free to ask :)
Changes in thermal energy provide evidence that a chemical reaction
has occurred. Which of the following BEST describes a chemical reaction
in which energy is released?
Select one:
Exothermic reaction.
Reversible reaction
Physical reaction
Endothermic reaction.
Answers
Answer:
Exothermic reaction
Explanation:
Exothermic reaction is a reaction in which energy is evolved from the reaction to the surroundings
5. What is the charge on a single proton?
Answers
Answer:
it may be +1 or -1 hope this help
An atom is a kind of stuff that cannot be further decomposed chemically. Therefore, the charge on a single proton is +1.
What is atom?
The building block of an element is an atom. An atom is a kind of stuff that cannot be further decomposed chemically. The three main components of an atom are protons, neutrons, plus electrons.
Some substances are either bigger or smaller than atoms. Instances of chemical species that aren't commonly regarded as atoms include protons, neutrons, and electrons, which are atom-related particles. Atoms make up molecules and compounds, however they are not actual atoms. Salt is an example of a molecule and a compound (NaCl). The charge on a single proton is +1.
Therefore, the charge on a single proton is +1.
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A chemist determined by measurements that 0.0400 moles of potassium iodide participate in a chemical reaction. Calculate the mass of potassium iodide that participates. Be sure your answer has the correct number of significant digits.
Answers
Answer:
#############################
Answer:
j
Explanation:
Riddle
Why did the rock collector like his
collection of metamorphic rocks so much?
Answers
Answer:
Because they would keep changing? Or Because they were the hottest?
Please please help me!!!! I WILL GIVE BRAINLIEST
Answers
Answer:
20.0 sec
you can use ln (2)=k* t1/2 then ln N2/N1=-k(t2-t1)
or just divide 100 by 2 then 50 by 2 then 25 by 2 then 12.5 by 2 and that is 4 half lifes at 5 secs each
Explanation:
Which of the following is the ground state electrons configuration of the F ion
Answers
Answer:
That leaves us with: 1s2 2s2 2p6 And that is the electron configuration for F- , the Fluoride ion.
Explanation:
plz give brainliest
A mole of carbon has the same number of atoms as a mole of beryllium.
O True
False
Answers
Answer:
False.
Explanation:
Carbon = 12
Beryllium = 9
good luck, i hope this helps :)
if a sample of 4.50 moles of hydrogen gas was reacted with excess nitrogen, how many moles of ammonia gas would be produced?
Answers
Answer: 3.00
Explanation: got the answer from my teachers notes
According to stoichiometry, if a sample of 4.50 moles of hydrogen gas was reacted with excess nitrogen, 3 moles of ammonia gas would be produced.
What is stoichiometry?Stoichiometry is the determination of proportions of elements or compounds in a chemical reaction. The related relations are based on law of conservation of mass and law of combining weights and volumes.
Stoichiometry is used in quantitative analysis for measuring concentrations of substances present in the sample.It is useful in balancing chemical reactions.In the given reaction 3 moles hydrogen gives 2 moles ammonia, thus, 4.5 moles of hydrogen will give, 4.5×2/3=3 moles.
Thus, if a sample of 4.50 moles of hydrogen gas was reacted with excess nitrogen, 3 moles of ammonia gas would be produced.
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How much does a 130 kg object weigh on Earth?
Answers
1 kilogram mass exert about 9.8 Newtons of force.
So 130x9.8=1,274 Newtons
A 130 kg object weighs approximately, 1274 Newtons on Earth.
The weight of an object on Earth can be calculated using the formula:
Weight = mass × acceleration due to gravity
Weight is calculated by multiplying the mass of an object by the acceleration due to gravity. On Earth, the acceleration due to gravity is approximately 9.8 meters per second squared (9.8 m/s²).
In this case, we have a 130 kg object. To find its weight on Earth, we can use the formula:
Weight = mass × acceleration due to gravity
Weight = 130 kg × 9.8 m/s²
Weight = 1274 Newtons (N)
So, the weight of a 130 kg object on Earth is approximately 1274 Newtons.
Therefore, a 130 kg object weighs approximately, 1274 Newtons on Earth.
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Two different gases are stored inseparate closed containers. If both gases have a temperature of 50°C, which
statement is true?
Answers
Answer:
Explanation:
there should be more showing than telling
the particle that move around the nucleus is are
Answers
Answer:
electrons
The nucleus contains two types of subatomic particles, protons and neutrons. The protons have a positive electrical charge and the neutrons have no electrical charge. A third type of subatomic particle, electrons, move around the nucleus. The electrons have a negative electrical charge
Explanation:
HOPE ITS HELPFUL FOR U IF YES PLZ MARK ME AS BRILLIANT
Look at the periodic table below. Which of the following lists of elements forms a group on the periodic table?
periodic table
Group of answer choices
Sc, Ti, V, C
Answers
Answer:
I'm not totally sure but I think that it is C-carbon
Explanation:
because its in the area of +1+2+3 4 -3 -2 -1
Select the correct answer.
What is the chemical formula of calcium chloride?
A.
CaCl
B.
Ca2Cl2
C.
Ca2Cl
D.
CaCl2
Answers
Answer:
D.CaCl2
Explanation:
Answer:
ans is D because the velency of calcium is 2 and clorine is 1 if we do cross multyply then it is option dThe two basic types of air pollutants are _____.
liquids
invisible
particulates
gases
Answers
Answer:
particulates and gases
Explanation:
What is the most common oxidation number for group 3 on the periodic table?
Answers
Answer:
español
Un elemento del grupo 3 es un elemento situado dentro de la tabla periódica en el grupo 3. Los átomos de estos elementos tienen gran tendencia a oxidarse y son muy reactivos, predominando el estado de oxidación +3. Presentan propiedades muy similares al aluminio. Dan lugar a iones incoloros.
ingles
An element of group 3 is an element located within the periodic table in group 3. The atoms of these elements have a great tendency to oxidize and are very reactive, with the +3 oxidation state predominant. They have properties very similar to aluminum. They give rise to colorless ions.
Explanation:
ingles
Group -> 3
Group -> 3Period
Group -> 3Period4 21
Group -> 3Period4 21Sc
Group -> 3Period4 21Sc5 39
Group -> 3Period4 21Sc5 39Y
Group -> 3Period4 21Sc5 39Y6 57
Group -> 3Period4 21Sc5 39Y6 57The
Group -> 3Period4 21Sc5 39Y6 57The7 89
Group -> 3Period4 21Sc5 39Y6 57The7 89Ac
español
Grupo -> 3
Grupo -> 3Periodo
Grupo -> 3Periodo4 21
Grupo -> 3Periodo4 21Sc
Grupo -> 3Periodo4 21Sc5 39
Grupo -> 3Periodo4 21Sc5 39Y
Grupo -> 3Periodo4 21Sc5 39Y6 57
Grupo -> 3Periodo4 21Sc5 39Y6 57La
Grupo -> 3Periodo4 21Sc5 39Y6 57La7 89
Grupo -> 3Periodo4 21Sc5 39Y6 57La7 89Ac
Why aren't acid-base reactions considered redox reactions, even though they involve the transfer of hydrogen atoms?
Answers
Answer: Acid/base and precipitation reactions almost always are NOT redox reactions. For redox to have happened, the number of electrons that an element has must change (i.e. its oxidation state must change). ... But the hydrogen ion never "has" any electron throughout the process and remains in a +1 oxidation state.
Explanation:
let me know if that helped...(☞ﾟヮﾟ)☞
Acid-base reaction is not a redox reaction, since the oxidation number remains unchanged in acid-base reaction.
What is acid-base reaction?An acid-base reaction is the chemical reaction that occur when acids and bases react together.
What is redox reaction?Redox reaction is a reaction that involves the transfer of electrons between the atoms, ions, or molecules.
Acid-base reactions involve the transfer of hydrogen ions between reactants. Redox reactions involve a change in oxidation number for one or more reactant elements.
Redox reactions involve a change in oxidation number for one or more reactant elements.
Acid-base reactions involve a transfer of a hydrogen ion instead of an electron and the transfer of an H+ ion leaves the oxidation numbers unaffected.
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what is the molarity of 5.63 moles of lithium in 3.25 liters of solution
Answers
Answer:
1.73 Molar
Explanation:
The formula is Molarity=moles of solute/liters of solution, which can be written in whatever way you prefer, and examples include: M=N/V or M=mol/L.
M=N/V
M= [tex]\frac{5.63}{3.25}[/tex]
Divide 5.63 by 3.25. When you calculate this, you get 1.73, therefore your answer is 1.73 molar.
The tectonic plates float on the lower portion of Earth's crust?
Answers
Answer:
The tectonic plates comprise the bottom of the crust and the top of the Earth's mantle. There are ten major plates on Earth and many more minor ones. They float on a plastic-like part of the Earth's mantle called the asthenosphere.
Explanation:
Answer:
Yes
Explanation:
Balance the following equation:
Sg + F2 --> SF
Answers
Answer:
S+ F2 ⇒ SF
S=1
F =2
So S +F2 ......... 2SF
2S + F2 ..........2SF this is a balance equation
S=2 F=2 in left side s=2 F = 2 in rightside
Explanation:⇆
⇒
An isotope of an element has 95 protons and 146 neutrons. What is the symbol for this
element?
Answers
Answer:
238 is the answer
Explanation:
238 - 146 + 3 = 95
Americium (95Am) is an element that has 95 protons and 146 neutrons in its nucleus of an atom.
What is Americium (95Am)?Americium is an element that has 95 protons and 146 neutrons. Its symbol is Am. Its atomic mass is 241 amu which is get by addition of proton and neutron.
So we can conclude that Americium (95Am) is an element that has 95 protons and 146 neutrons in its nucleus of an atom.
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What are the intermediate chemical equations for this reaction
Reaction 1
Reaction 2
Reaction 3
Answers
Answer:
REACTION 2
Explanation:
BEACUSE IT SYA IN THE QUESTION
Answer:
Reaction 1: Mg(s) + 2HCl(aq) -> MgCl2(aq) + H2(g)
Reaction 2: MgO(s) + 2HCl(aq) -> MgCl2(aq) + H2O(l)
Reaction 3: H2(g) + ½ O2(g) -> H2O(l)
Explanation:
answer for brainlist and extra points!!
Answers
Answer:D
Explanation:
Can you help me please....
Answers
sorry the pic is blocked
Which group in the periodic table contains the lightest ferromagnetic element?
Question 12 options:
A)
Group 9
B)
Group 8
C)
Group 10
D)
Group 7
Answers
The answer is B) Group 8 .
For each of the following ionic bonding examples, show the transfer of electrons, the ions resulting with the charges and the final chemical formula of the compund.
Ba and O,
Al and O,
Mg and P,
Na and O,
Ca and Cl
Answers
Answer:
BaO
Ba gives up two electrons and becomes Ba⁺²O takes two electron and becomes O⁻²Al₂O₃
Mg₃P₂
Na₂O
CaCl₂
What is the formula for sulfate?
What is the charge of sulfate?
What is the correct formula for copper (II) sulfate?
Answers
Answer:
SO₄²-, -2, CuSO4
Explanation:
Dang that was long.
Which of the following diagrams represents a single
replacement reaction?
Answers
Explanation:
i think the answer is....b
The diagram that represents single replacement reaction is:
b.
Single replacement reaction:This reaction is also known as displacement reaction. It is a reaction in which one element is substituted for another element in a compound. When a replacement reaction occurs, a new aqueous compound and a different pure element will be generated as products. For example:
[tex]2HCl(aq)+Zn(s)--->ZnCl_2(aq)+H_2(g)[/tex]
Thus, option b is correct.
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What is the molarity of a solution in which 35 mole of AgNO3 is dissolved in 5 L of solution?
Answers
Answer:
23
Explanation:
Answer:
0.118m
Explanation: