Answer:
C. H₂SO₄
Explanation:
Given expression:
H₂O + SO₃ → H₂SO₄
In the chemical reaction, the product and the reactant have the same species.
Chemical reactions obeys the law of conservation of matter.
This way, atoms combine with one another to give a desired product. The products will contain a mix of the reactants.
Fluorine is not part of the reactantsCarbon is not part of the reactantsCarbon is not part of the reactants.Answer:
cccccccccc
Explanation:
The specific heat of a substance is 0.38 J/goC. How much energy is required to raise the temperature of 42 g of the substance from 25oC to 39oC?
Answer:
223.4J
Explanation:
Given parameters:
Specific heat capacity of substance = 0.38J/g°C
Mass of substance = 42g
Initial temperature = 25°C
Final temperature = 39°C
Unknown:
Energy required to raise the temperature = ?
Solution:
The amount of heat required by the substances can be derived using the expression below;
H = m c Δt
H is the amount of heat energy
m is the mass
c is the specific heat capacity
Δt is the change in temperature;
Δt = 39°C - 25°C = 14°C
Now insert the parameters and solve;
H = 42 x 0.38 x 14 = 223.4J
Calculate the pH of the resulting solution if 32.0 mL of 0.320 M HCl(aq) is added to (a) 42.0 mL of 0.320 M NaOH(aq). (b) 22.0 mL of 0.420 M NaOH(aq).
Answer:
a) pH = 11.5
b) pH= 3
Explanation:
a) lets calculate the number of moles of each reactant
moles of HCl = 32/1000 * 0.32 = 0.01024 mole
moles of NaOH = 42/1000 * 0.32 = 0.01344 moles
1 moles of HCl reacts with 1 moles of NaOH , so 0.01024 mole of HCl should react with 0.01024 moles of NaOH , but there is some excess NaOH.
excess NaOH= 0.01344 -0.01024 = 0.0032 moles
[H+]= [tex]\frac{10^{-14} }{0.0032} = 3.125 *10^{-12}[/tex]
pH= -log [3.125*10^-12) = 11.5
b) moles of NaOH = 0.00924
excess HCl present = 0.01024 - 0.00924 =.001
so excess [H+] = 0.001
pH= -log( 0.001) = 3
Diazomethane has the following composition by mass: 28.57% C, 4.80% H, and 66.64% N. The molar mass of diazomethane is 42.04 g/mol. Find the molecular formula of diazomethane.
Answer:
CH2N2
Explanation:
To find the molecular formula, we must first find the empirical formula as follows:
28.57% C - 28.57g of Carbon
4.80% H - 4.80g of Hydrogen
66.64% N - 66.64g of Nitrogen
Next, we convert this mass values to mole by dividing by their respective atomic mass.
C = 28.57/12 = 2.38mol
H = 4.80/1 = 4.80mol
N = 66.64/14 = 4.76mol
Next, we divide each mole value by the smallest mole value (2.38mol)
C = 2.38mol ÷ 2.38 = 1
H = 4.80mol ÷ 2.38 = 2.01
N = 4.76mol ÷ 2.38 = 2
The empirical ratio of C, H and N is therefore 1:2:2. Hence, the empirical formula is CH2N2
To calculate the molecular formula;
(CH2N2)n = 42.04 g/mol
{12 + 1(2) + 14(2)}n = 42.04
{12 + 2 + 28}n = 42.04
{42}n = 42.04
n = 42.04/42
n = 1.00009
Since n = 1, molecular formula is CH2N2
What is the correct name for FeCl3
Ferric chloride (also called Iron chloride)
How many moles of carbon (C) are there in 92.5 g of C?
Answer:
c are there 93.5 of c yan siguro
How did Altair begin
Answer:
Altaïr is an ancestor (on the maternal side) of Desmond Miles, a modern-day assassin. He was trained in the Masyaf Castle in Syria by Al Mualim, his guardian since childhood.
Explanation:
balance NO + 02 -- NO2
Answer:
NO + O2 -> NO2
it is balanced
Which of the following is NOT a part of Dalton's atomic theory
Answer:
u didn't give us the multiple hoice answer
Explanation:
Answer:
Here are the answer choices
Explanation:
A) Compounds contain atoms of at least two different elements.
B) Each element is made up of atoms.
C) Each element contains atoms with negatively charged particles.
D) Atoms within the same element have the same amount of mass.
1.
Based on the following information, arrange the A, B, C, and D from lowest to highest
activity (in order of increasing ability to act as reducing agents).
I. Only A, C and D react with 1 mol/L HCl to give H2(e).
II. When A is added to solutions of the other metal ions, metallic B and Care
formed but not D.
a) C
b) B
c) B
d) C
e) B
Order of metals from least reactive to most reactive: B <C <A <D
Further explanationReducing agents are substances that experience oxidation
Oxidizing agents are substances that experience reduction
The metal activity series is expressed in voltaic series
Li-K-Ba-Ca-Na-Mg-Al-Mn- (H2O) -Zn-Cr-Fe-Cd-Co-Ni-Sn-Pb- (H) -Cu-Hg-Ag-Pt-Au
The more to the left, the metal is more reactive (easily release electrons) and the stronger reducing agent
The more to the right, the metal is less reactive (harder to release electrons) and the stronger oxidizing agent
So that the metal located on the left can push the metal on the right in the redox reaction
Let's analyze the statement in the problem
I. Only A, C and D react with 1 mol/L HCl to give H₂(e)
M + HCl ⇒ MCl + H₂(MCl : alkali, MCl₂ : alkaline earth)
A, C and D can react with 1 mol / L HCl, meaning metals A, C and D are located to the left of element H (more reactive), and B in the right of element H
II. When A is added to solutions of the other metal ions, metallic B and C are formed but not D.
This means that metal A is more reactive than metals B and C, while D is more reactive than A, so metal D is the most reactive
What elements would likely form an ionic bond?
a. C & O
b. Mg & Cl
c. Mg & Ca
d. Cl & Ar
When electrons are ______________ from one atom to another, we say the bond is ionic.
a. transferred
b. shared
How many electrons does 47Ag+1 have?
107
47
48
46
Answer:
b. Mg & Cl
a. transferred
46
Explanation:
Ionic bonds form between metals and non-metals when electrons are transferred from one specie to another.
The electrostatic attraction from the resulting ions forms the ionic bonds. A metal is electropositive and will readily donate electronsA non-metal is electronegative and will accept electrons. This creates two oppositely charge ions that attracts by means of ionic bonding.Since Mg and Cl are the only metal - non-metal pair, and ionic bond will form between them.
2.
In the specie;
₄₇Ag¹⁺
47 is the atomic number of the element Ag.
The atomic number is the number of protons in an atom. For a specie in neutral state, the number of protons and electrons are the same.
When an atom loses electron, it becomes positively charged. Here Ag has lost one electron and then, the number of electrons becomes 46. The number of protons is still 47Whatss the answer giving brainliest:)
Answer:
A.
Explanation:
I just know.
Answer:
a.
Explanation:
Select the correct answer. Why is it important to include recovery time in a workout program? A. It prevents you from getting bored with the workout. B. It gives balance to your workout program. C. It allows your body time to rest. D. It ensures that overload from the workout will not occur.
Answer:
C) It allows your body time to rest.
Explanation:
Hope this helps!
Answer:
C.) It allows your body time to rest.
Explanation:
PLATO
A students drawing of a nitrogen atom is shown. What change would make the model more accurate?
A-move the electrons into the nucleus
B-add 2 more protons
C-show 7 neutrons in the nucleus
D-remove 2 electrons
(Please leave a small explanation)
Answer:
C - show 7 neutrons in the nucleus
Explanation:
Use process of elimination:
-Answer A will not work because electrons are not in the nucleus.
-Answer B will change the atom's identity from nitrogen to fluorine; it will not work.
-Answer D will create a nitrogen ion, which is not what the prompt is asking for (an atom); it will not work.
The only logical answer is C, as that is the only one that is also true.
Lab: Types of Chemical Reactions
Student Guide
This laboratory allows you to study various kinds of chemical reactions, including some that result in precipitates.
Lesson Objectives
• Compare and contrast synthesis, single-displacement, and double-displacement reactions.
PREPARE
Approximate lesson time is 60 minutes.
Materials
• Lab Instructions: Lab_5.08_Instructions_modified_2020
• Lab Report: Lab_5.08_Report_modified_2020
• Lab Guidelines: Lab_Guidelines_modified
LEARN
Activity 1: Types of Chemical Reactions 1
Instructions
As you read through the lesson online, use the space below to take notes.
In this laboratory, you will study different kinds of chemical reactions.
Knowing the types of reactions helps you interpret your observations.
In a synthesis reaction, two reactants unite to form a third product.
In a single-displacement reaction, one ion of a reactant bonds with the second reactant.
In a double-displacement reaction, ions of both reactants change places.
Activity 2: Types of Chemical Reactions 1
Instructions
Procedure
1. Open the Chemical Reactions Virtual Lab.
2. Click View the Tutorial and complete the tutorial to learn how to conduct the lab.
3. Close the tutorial and click begin the Lab.
Part 1 Synthesis Reaction
4. Perform the procedure, placing the magnesium strip in the flame.
5. Record your reaction.
6. Research the chemical reaction of magnesium and oxygen gas. Write an equation for the chemical reaction
that accounts for the observed reaction in this part of the lab.
7. Answer the question: What is a synthesis reaction?
8. Answer the questions on Part 1 in the Lab Report.
Part 2 Single Displacement Reaction
9. Place 1 scoop of zinc in Vial A and add 10 drops of copper (II) sulfate. Observe the reaction.
10. Place ball of aluminum in Vial B and add 10 drops of copper (II) sulfate. Observe the reaction.
11. Place 1 scoop of zinc in Vial C and add 10 drops of silver nitrate. Observe the reaction.
12. Place copper wire in Vial D and add 10 drops of silver nitrate, wait 5 minutes. Observe the reaction.
13. Complete the ta
Answer:
hope this helps
Explanation:
see pictures try to put them in order
A molecule is made up of two or more atoms bonded together. True or false
Answer:
True
Explanation:
a group of two or more atoms that form the smallest identifiable unit into which a pure substance can be divided and still retain the composition and chemical properties of that substance.