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miv72 [106K]
3 years ago
12

Chloe’s teacher gives her and her lab partner soil samples from different parts of the city: the park, the area next to a pond,

the school, and a neighborhood. Chloe’s teacher also gives her a soil tester kit, which determines the pH of the soil. Chloe and her lab partner need to determine the pH of each soil sample and then compare them.
Fill in the blank with the word that best completes the statement.

This investigation is a(an)______investigation.
Chemistry
1 answer:
yuradex [85]3 years ago
8 0

Answer:

an

Explanation:

It is AN because investigation starts with I ( i is a vowel). When there are vowels we use An.

Pls mark me brainliest!

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A gas sample occupies 8.77 L at 20 degrees Celsius and 3.98 atm. What is
Softa [21]

Answer:

1.45 mol

Explanation:

Given data

  • Volume of the gas (V): 8.77 L
  • Temperature of the gas (T): 20 °C
  • Pressure of the gas (P): 3.98 atm

Step 1: Calculate the absolute temperature (Kelvin)

We will use the following expression.

K = \°C + 273.15\\K = 20\°C + 273.15 = 293K

Step 2: Calculate the number of moles (n) of the gaseous sample

We will use the ideal gas equation.

P \times V = n \times R \times T\\n = \frac{P \times V}{R \times T} = \frac{3.98atm \times 8.77L}{\frac{0.0821atm.L}{mol.K}  \times 293K} = 1.45 mol

3 0
3 years ago
10. Two primary sites for the<br> polio virus replication?
Marrrta [24]

Answer:

the cytoplasm

protein 3b more commonly called vpg

3 0
2 years ago
Calcium Carbonate has solubility product constant (Ksp) of 3.3 x 109
Gelneren [198K]

Answer:

no

Explanation:

bc no shshshhshsdhddhhdhdhdhf

5 0
4 years ago
Who developed the first fabricated obturator? A. Paré B. Vesalius C. The Romans D. Fauchard
balandron [24]

I believe the correct answer is option A. Paré.

Or otherwise known as Ambroise Paré. He was considered one of the "fathers of surgery" for modern forensic pathology. And was known to be a pioneer in surgical techniques on the battlefield using medicine, mostly in the treatment/healing of wounds.

Hope I could help! :)

3 0
3 years ago
Read 2 more answers
Please help I’m failing
denis-greek [22]

Answer:

C.

Explanation:

Solubility KClO3 at 45°C is around 15 g KClO3 in 100 g of water. We have

30 g that is more. So, solution is supersaturated.

3 0
3 years ago
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