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3 years ago

HURRRYYY !!!!!

Chemistry

1 answer:

coldgirl [10]3 years ago

6 0

Answer:

The correct answer is - increase Florida's average income per person.

Explanation:

Kennedy Space Center established by NASA helped the boosting economy of Florida. Spaceport operations in Kennedy Space Center benefit Florida by a total economic impact of nearly $4 billion on Florida's economy.

This space center helped in the 7,639 jobs in 2018 and 2019 and 37 new space operation companies. These jobs increased Florida's average income per person above $91,000.

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Humans belong to the Kingdom Animalia and Domain Eukarya. In terms of classification, which choice best represents the hierarchy

Valentin [98]

Domains are larger than kingdoms and include more organisms as far as the classification of living organisms is concerned.

Domains

When it comes to classifying living organisms, the highest level of classification is the domain. Under each domain is where we have the kingdoms.

For example, the domain eukarya contain four kingdoms; plant, animal, fungi, and protozoa.

More on classification can be found here: brainly.com/question/11529195

3 0

3 years ago

What is the IUPAC name for NH3?

Ne4ueva [31]

Answer:

The IUPAC name for NH3 would be Azane

Explanation:

6 0

3 years ago

the mass concentration the mass concentration for a solution containing 45 g of calcium carbonate is 100 cm3

OverLord2011 [107]

Answer: The mass concentration for a solution containing 45 g of calcium carbonate for 100 $cm^{3}$ is 0.045 M.

Explanation:

Given: Mass of calcium carbonate = 45 g

Volume = $100 cm^{3}$

Convert $cm^{3}$ into L as follows.

$1 cm^{3} = 0.001 L\\100 cm^{3} = 100 cm^{3} \times \frac{0.001 L}{1 cm^{3}}\\= 0.1 L$

Moles of calcium carbonate (molar mass = 100 g/mol) is as follows.

$No. of moles = \frac{45 g}{100 g/mol}\\= 0.45 mol$

Molarity is the number of moles of solute present in a liter of solution.

Hence, molarity (or mass concentration) of given solution is calculated as follows.

$Molarity = \frac{no. of moles}{Volume (in L)}\\= \frac{0.45 mol}{0.1 L}\\= 0.045 M$

Thus, we can conclude that the mass concentration for a solution containing 45 g of calcium carbonate for 100 $cm^{3}$ is 0.045 M.

4 0

3 years ago

Investigations were carried out in a science lab to explore the topic of chemical and physical changes. Investigation A Step 1.

ozzi

Answer:

Investigation B, Step 2

Explanation:

The colour change is a good indication of a chemical change. The sugar molecules were most likely changing into something else.

Investigation A, Step 1. Wrong. The dissolving of salt is a physical process.

Investigation A, Step 2. Wrong. You simply boiled off the water (a physical process) and recovered the salt.

Investigation B, Step 1. Wrong. The dissolving of sugar is a physical process.

4 0

3 years ago

Read 2 more answers

If you react 156.0 g of calcium chloride with an excess NaOH, how much sodium chloride should you get?

laiz [17]

Answer:

164.3g of NaCl

Explanation:

Based on the chemical equation:

CaCl2 + 2NaOH → 2NaCl + Ca(OH)2

where 1 mole of CaCl2 reacts with 2 moles of NaOH

To solve this question we must convert the mass of CaCl2 to moles. Using the chemical equation we can find the moles of NaCl and its mass:

Moles CaCl2 -Molar mass: 110.98g/mol-

156.0g CaCl₂ * (1mol / 110.98g) = 1.4057 moles CaCl2

Moles NaCl:

1.4057 moles CaCl2 * (2mol NaCl / 1mol CaCl2) = 2.811 moles NaCl

Mass NaCl -Molar mass: 58.44g/mol-

2.811 moles NaCl * (58.44g / mol) = 164.3g of NaCl

7 0

3 years ago