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Vinil7 [7]
4 years ago
8

Write the formula of calcium tetraoxosulphate(v)​

Chemistry
1 answer:
IRISSAK [1]4 years ago
5 0

Explanation:

this is your aur answer thank you for calcium test of tetraoxosulphate

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Which element has the same number of energy levels as krypton (Kr) and the same number of valence electrons as nitrogen (N)?
Alex
The correct answer is indeed Arsenic (As). This is the element that fits the description of being in period 4 and group 5, just like Krypton and Nitrogen.
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4 years ago
A dehydration reaction starting with 3.8 g cyclohexanol produces 2.6 g cyclohexene. Calculate the theoretical yield for this rea
diamong [38]

Answer:

Theoretical yield of C6H10 = 3.2 g.

Explanation:

Defining Theoretical yield as the quantity of product obtained from the complete conversion of the limiting reactant in a chemical reaction. It can be expressed as grams or moles.

Equation of the reaction

C6H11OH --> C6H10 + H2O

Moles of C6H11OH:

Molar mass of C6H110H = (12*6) + (1*12) + 16

= 100 g/mol

Mass of C6H10 = 3.8 g

number of moles = mass/molar mass

=3.8/100

= 0.038 mol.

Using stoichoimetry, 1 moles of C6H110H was dehydrated to form 1 mole of C6H10 and 1 mole of water.

Therefore, 0.038 moles of C6H10 was produced.

Mass of C6H10 = molar mass * number of moles

Molar mass of C6H10 = (12*6) + (1*10)

= 82 g/mol.

Mass = 82 * 0.038

= 3.116 g of C6H10.

Theoretical yield of C6H10 = 3.2 g

4 0
4 years ago
A ball has 2 kg* m/s of momentum when thrown with a velocity of 8 m/s outwards. Find the mass of the ball.
Advocard [28]

Answer:

\large \boxed{\text{0.25 kg}}

Explanation:

We can use the formula for momentum to calculate the mass.

\begin{array}{rcl}p & = & mv\\2 & = & m \times 8\\m & = & \dfrac{2}{8}\\\\& = & \textbf{0.25 kg}\\\end{array}\\\text{The mass of the ball is $\large \boxed{\textbf{0.25 kg}}$}

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3 years ago
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Answer:

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Explanation:

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3 years ago
How many significant figures are in 28.6 g
Alex787 [66]
There are no zeros, so all three digits<span> are significant.</span>
<span>b. 3440.</span>
8 0
3 years ago
Read 2 more answers
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