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prisoha [69]
3 years ago
5

A different consideration of hardness is an issue that applies to the chemistry of swimming pool water. In this case, appreciabl

e hardness is desired because it deters the pool water from leaching minerals, for example, from tile grout. You analyze the pool water for a friend and determine it has calcium hardness of 175 mg/L as CaCO3. The professional pool maintenance guideline is that calcium hardness should be between 5 and 10 millimoles Ca2 per liter. You convert the concentration expressed as 175 mg/L CaCO3 to compare it to the Ca2 guideline. What is the concentration of Ca2 in mM
Business
1 answer:
kenny6666 [7]3 years ago
3 0

Answer:

1.748 mM

Explanation:

Concentration in g / L = Molarity × molar mass

molar mass of calcium carbonate = 100.0869 g/mol

175 mg/L =    175 ÷ 1000 = 0.175 g/L

0.175 g/L = Molarity × 100.0869 g/mol

(0.175 g/L) / 100.0869 = Molarity

Molarity = 0.001748 M

CaCO₃ → Ca²⁺ + CO₃²⁻ when it dissociate in water.

1 M of  CaCO₃ yielded 1 M of Ca²⁺

0.001748 M of  CaCO₃ will also yield 0.001748 M of  Ca²⁺

then 0.001748 × 1000 = 1.748 mM concentration of Ca²⁺

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matrenka [14]

Answer:

$33.50

Explanation:

we can use the perpetual growth model to determine the price of the stock

the firm's stock price = ($1.25 x 1.15)/1.11 + ($1.25 x 1.15²)/1.11² + ($1.25 x 1.15³)/1.11³ + [($1.25 x 1.15³ x 1.06)/(11% - 6%)]/1.11³

the stock price in 3 years = ($1.25 x 1.15³ x 1.06)/(11% - 6%) = $40.30

the firm's stock price = ($1.25 x 1.15)/1.11 + ($1.25 x 1.15²)/1.11² + ($1.25 x 1.15³)/1.11³ + $40.30/1.11³ = $1.30 + $1.34 + $1.39 + $29.47 = $33.50

4 0
3 years ago
when compared to the country of origin principle, the country of reception approach to jurisdiction over internet transactions
Oxana [17]

When compared to the country of origin principle, the country of reception approach to jurisdiction over internet transactions requires business managers to have more knowledge of the laws of other countries.

<h3>What is the significance of country of origin principle?</h3>

The country of origin principle is an important feature of leading parts of Union law. It is also known as<u> home country control, </u><u>country</u><u> of </u><u>origin</u><u> rule</u>, and <u>country of </u><u>origin</u><u> </u><u>principle</u><u>.</u>

The country of origin principle mainly aims to ensure the effective protection of the public interest in the country of origin.

Basically, the country of origin principle has the main purpose to vest exclusive jurisdiction to regulate in one Member State only.

Learn more about the country of origin principle here:-

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8 0
2 years ago
Assume the price of gasoline doubles tonight and remains at that price the next two years. The price elasticity of demand for ga
enyata [817]

Answer:

The correct answer is letter "D": more inelastic.

Explanation:

When its price changes, the supply, and demand for an inelastic good or service are not dramatically impacted. Whether the price of an inelastic product goes up or down, the buying habits of consumers remain roughly the same. <em>Prescription drugs, food, clothing, </em>and <em>gasoline</em> are common examples of inelastic goods.

Thus, <em>if the price of gasoline doubles tonight, that price would be considered more inelastic tomorrow compared to the current price until today than comparing the doubled price during the course of the upcoming two years</em>.

6 0
4 years ago
XYZ Co. is using a predetermined overhead rate that was based on estimated total fixed manufacturing overhead of $121,000 and 10
stira [4]

Answer:

the predetermined overhead rate is $12.10

Explanation:

The computation of the predetermined overhead rate is shown below:

The Predetermined overhead rate is

= (Estimated total fixed manufacturing overhead ÷ Estimated direct labor hours)

= ($121,000 ÷ 10,000)

= $12.10

hence, the predetermined overhead rate is $12.10

6 0
3 years ago
The government of country A has determined there is a coal shortage based on mining reports. As a result of these data, the gove
Gekata [30.6K]

The answer is: allocate resources.

Resource allocation refers to the act of managing the usage of assets that we own in order to achieve our goal.  In order to deal with a shortage, the common strategies that the government use usually revolve around either reducing the consumption of that commodity, reducing export, increasing our own production or increasing the purchase of that resource from other countries.

4 0
3 years ago
Read 2 more answers
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