All categories

3 years ago

Which of the following includes a wedge.A.axe B.filec.boltd.hammer

Chemistry

2 answers:

REY [17]3 years ago

4 0

An ax includes a wedge because it is used to separate things just as a wedge is supposed to do

faust18 [17]3 years ago

3 0

The correct answers would be A, and D

You might be interested in

The law of conservation of matter states that matter is neither created nor destroyed in a chemical reaction. Which of the follo

Artyom0805 [142]

Answer:

Explanation:

4 0

3 years ago

Read 2 more answers

Gaseous butane CH3CH22CH3 reacts with gaseous oxygen gas O2 to produce gaseous carbon dioxide CO2 and gaseous water H2O. What is

SOVA2 [1]

Answer:

10.56 g

Explanation:

C4H10(g) + 13/2O2 (g) -------> 4CO2(g) + 5H2O(l)

Number of moles of butane = 3.49g/ 58 g/mol = 0.06 moles

1 mole butane yields 4 moles of CO2

0.06 moles of butane = 0.06 × 4/1 = 0.24 moles of CO2

Number of moles of oxygen = 17.1g/32g/mol = 0.53 moles of oxygen

6.5 moles of oxygen yields 4 moles of CO2

0.53 moles of oxygen yields 0.53 × 4/6.5 =0.33 moles of CO2

Butane is the limiting reactant

Theoretical yield of CO2 = 0.24 moles × 44g/mol = 10.56 g

3 0

3 years ago

The amount of I₃⁻(aq) in a solution can be determined by titration with a solution containing a known concentration of S₂O₂⁻³(aq

puteri [66]

Answer: 0.22 M

Explanation:

$2S_2O_3^{2-}(aq)+I_3^-\rightarrow S_4O_6^{2-}(aq)+3I^-(aq)$

Molarity of a solution is defined as the number of moles of solute dissolved per Liter of the solution.

$Molarity=\frac{moles}{\text {Volume in L}}$

moles of $Na_2S_2O_3=Molarity\times {\text {Volume in L}}=0.440\times 0.025=0.011moles$

$Na_2S_2O_3\rightarrow 2Na^+S_2O_3^{2-}$

Thus moles of $S_2O_3^{2-}$ = 0.011

According to stoichiometry:

2 moles of $S_2O_3^{2-}(aq)$ require 1 mole of $I_3^$

Thus 0.011 moles of $S_2O_3^{2-}(aq)$ require= $\frac{1}{2}\times 0.011=5.5\times 10^{-3}$ moles of $I_3^-$

Thus Molarity of $I_3^-=\frac{5.5\times 10^{-3}}{0.025L}=0.22M$

Therefore, the molarity of $I_3^-$ in the solution is 0.22 M

5 0

4 years ago

Rank these transition metal ions in order of decreasing number of unpaired electrons.

lesya692 [45]

Answer: The given transition metal ions in order of decreasing number of unpaired electrons are as follows.

$Mn^{4+} > V^{3+} = Ni^{2+} > Fe^{3+} > Cu^{+}$

Explanation:

In atomic orbitals, the distribution of electrons of an atom is called electronic configuration.

The electronic configuration in terms of noble gases for the given elements are as follows.

Atomic number of Fe is 26.

$Fe^{3+} - [Ar] 3d^{5}$

So, there is only 1 unpaired electron present in $Fe^{3+}$ .

Atomic number of Mn is 25.

$Mn^{4+} - [Ar]3d^{3}$

So, there are only 3 unpaired electrons present in $Mn^{4+}$ .

Atomic number of V is 23.

$V^{3+} - [Ar] 3d^{2}$

So, there are only 2 unpaired electrons present in $V^{3+}$ .

Atomic number of Ni is 28.

$Ni^{2+} - [Ar] 3d^{8}$

So, there will be 2 unpaired electrons present in $Ni^{2+}$ .

Atomic number of Cu is 29.

$Cu^{+} - [Ar] 3d^{10}$

So, there is no unpaired electron present in $Cu^{+}$ .

Therefore, given transition metal ions in order of decreasing number of unpaired electrons are as follows.

$Mn^{4+} > V^{3+} = Ni^{2+} > Fe^{3+} > Cu^{+}$

Thus, we can conclude that given transition metal ions in order of decreasing number of unpaired electrons are as follows.

$Mn^{4+} > V^{3+} = Ni^{2+} > Fe^{3+} > Cu^{+}$

7 0

3 years ago

What is called the powerhouse of a cell because it breaks down nutrients to help make the major energy source of the cell?.

Lisa [10]

MITOCHONDRIA.
The powerhouse of a cell is Mitochondria, don’t you even forget this.

6 0

3 years ago

Which of the following includes a wedge.A.axe B.filec.boltd.hammer​

Which of the following includes a wedge.A.axe B.filec.boltd.hammer