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3 years ago

Which description is an example of point-souce pollution?

Chemistry

1 answer:

lina2011 [118]3 years ago

4 0

Answer: B

Explanation:

Your answer would be B.

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A mixture of CuSO4 · 5H2O and MgSO4 · 7H2O is heated until all the water is lost. If 5.127 g of the mixture gives 2.817 g of the

Nadusha1986 [10]

Answer:

Let the mixture is X% by mass of CuSO

.5H

O and 100 - X % by mass of MgSO

.7H

O. 5.0 g of mixture will contain 0.05X g CuSO

.5H

O and 5.0 - 0.05X g MgSO

.7H

The molar masses of CuSO

.5H

O and MgSO

.7H

O are 249.7 g/mol and 246.5 g/mol respectively.

The number of moles of CuSO

.5H

249.7

0.05X

=2.00×10

−4

X moles.

Explanation:

Pls mark it as branliest answere thanks

3 0

3 years ago

What defining feature makes a material an insulator?

kompoz [17]

A defining feature of a material that is a good insulator would be its ability to stop or cancel an electric charge of another material. This happens because the molecules in the material are stable and there are no free electrons that would allow the charges to flow.

3 0

4 years ago

An ideal liquid mixture of benzene and toluene (50% by volume each) is used in a plant at 27°C and 1 atm. Determine (a) the mixt

cestrela7 [59]

Answer:

See explaination

Explanation:

Please kindly check attachment for the step by step solution of the given problem.

7 0

4 years ago

Atomic mass is typically expressed in

Andre45 [30]

Answer:

amu

Explanation:

Please mark as brainleist

8 0

3 years ago

Read 2 more answers

How many atoms of cobalt are in 4 moles of cobalt?

Anna [14]

<h3>Answer:</h3>

2 × 10²⁴ atoms Co

<h3>General Formulas and Concepts:</h3>

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right<u> </u>

<u>Chemistry</u>

<u>Atomic Structure</u>

Reading a Periodic Table
Avogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.

<u>Stoichiometry</u>

Using Dimensional Analysis

<h3>Explanation:</h3>

<u>Step 1: Define</u>

4 mol Co (Cobalt)

<u>Step 2: Identify Conversions</u>

Avogadro's Number

<u>Step 3: Convert</u>

Set up: $\displaystyle 4 \ mol \ Co(\frac{6.022 \cdot 10^{23} \ atoms \ Co}{1 \ mol \ Co})$
Multiply/Divide: $\displaystyle 2.4088 \cdot 10^{24} \ atoms \ Co$

<u>Step 4: Check</u>

<em>Follow sig fig rules and round. We are given 1 sig fig.</em>

2.4088 × 10²⁴ atoms Co ≈ 2 × 10²⁴ atoms Co

4 0

3 years ago