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Step2247 [10]
3 years ago
8

AAAH. Please help! BRAINLIEST to right answer.

Chemistry
1 answer:
ruslelena [56]3 years ago
3 0

Answer:

exothermic

.............

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if you take 2.0mL of a 7.0 ppm NaOH solution and dilute it to 250.0mL, calculate the final concentration in ppm.
Oduvanchick [21]

Answer:

C₂ = 0.056 ppm

Explanation:

Given data:

Initial volume = 2.0 mL

Initial concentration = 7.0 ppm

Final volume = 250.0 mL

Final concentration = ?

Solution:

Formula:

C₁V₁ = C₂V₂

C₁ = Initial concentration

V₁ = Initial volume

C₂ = Final concentration

V₂ = Final volume

Now we will put the values in formula.

C₁V₁ = C₂V₂

7.0 ppm × 2.0 mL = C₂ × 250.0 mL

C₂ = 14.0 ppm.mL /250.0 mL

C₂ = 0.056 ppm

4 0
3 years ago
an unknown sample with a mass of 50.0 grams changes from an initial temperature of 22.5°C to a final temperature of 32.4°C. It i
makvit [3.9K]

Answer:

Aluminum

Explanation:

7 0
3 years ago
For each example, identify if the food contains mostly saturated or unsaturated fatty acids.
dedylja [7]

Answer:

1. Vegetable oil, which is a liquid at room temperature, is used in making cake batter. <u>Unsaturated</u>

2. Chocolate, which is solid at room temperature, is derived from a seed. <u>Saturated</u>

3. Butter<u>,</u> which is a solid at room temperature, is often used in cooking. <u>Saturated</u>

4. The oil inside flaxseed oil pills is liquid at room temperature. <u>Unsaturated</u>

Explanation:

Saturated fats are those kinds of fat that do not have a double bond between their carbon atoms when represented structurally. At room temperature, they tend to assume the solid-state, and they are mostly obtained from animal sources. Unsaturated fats do have a minimum of one double bond between their carbon atoms and tend to assume the liquid phase. They are mostly obtained from plant sources.<em> </em>

1. Vegetable oil is obtained from a plant source and is, therefore, unsaturated fat.

2. Chocolate even though it comes from cocoa is solid at room temperature and is mostly comprised of saturated fat.

3. Butter a solid at room temperature is mostly made up of saturated fat and is sourced from animals.

4. Flaxseed oil obtained from a plant source is mostly unsaturated fat.

3 0
3 years ago
A chef is testing out a new set of iron cookware. He knows that iron has a specific heat of 445 J/kg°C. He heats a 2 kg iron ski
Musya8 [376]

Answer:

yo whats good nebyu its nathan Imao

Explanation:

5 0
3 years ago
Pls help me with this question
Drupady [299]
The answer is c hopefully I helped you
4 0
3 years ago
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