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Darya [45]
3 years ago
9

Someone please help.. You will receive lots of medals in the future because of people looking this question up and giving you me

dals
Matt did an experiment to study the solubility of two substances. He poured 100 mL of water at 20 °C into each of two beakers labeled A and B. He put 50 g of Substance A in the beaker labeled A and 50 g of Substance B in the beaker labeled B. The solution in both beakers was stirred for 1 minute. The amount of substance left undissolved in the beakers was weighed. The experiment was repeated for different temperatures of water and the observations were recorded as shown.

Part 1: Which, if any, substance is soluble in water?
Part 2: Explain how the data helped you determine solubility for both substances for temperatures 20 °C to 80 °C.

Mathematics
1 answer:
kotegsom [21]3 years ago
7 0
Part 1: I'm pretty sure B is soluble in water.
Part 2: The data is showing that A isn't soluble at all (probably cause it's solid or a lipid or something) because the amount undissolved stays the same as B changes in solubility.
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There are 120 female rabbits and 30 male rabbits because 30 times 4 is 120 and 120 plus 30 is 150
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sakyyah picked 12 apples. she gave 1/6 to each of her 5 friends. how many apples did each friends get?
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Each of her 5 friends received 2 apples.
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A garden table and a bench cost $672 combined. The garden table costs $78 less than the bench. What is the cost of the bench?
KonstantinChe [14]

Answer:

b = $375

Step-by-step explanation:

b = cost of the bench

t = cost of the table

t = b - 78

b + b - 78 = 672

2b = 750

b = $375

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3 years ago
Use substitution to solve the system of linear equations. In your final answer, include all of your work. y = -3x + 4 and x + 1/
FrozenT [24]

Answer:

y = -3x +4

Step-by-step explanation:

Using the expression for y, we can substitute that into the second equation:

... x + (1/3)(-3x +4) = 4/3

... 4/3 = 4/3 . . . . . simplify (True for any value of x.)

<em>These equations are dependent and have an infinite number of solutions</em>.

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Determine the current through each of the LEDs in the circuits below. Which LED will be
Anika [276]

a. I = 6. 1 × 10^-4 A

b. I = 2. 6 × 10^-3 A

c. I = 0. 04 A

The LED which would glow brightest is LED C with the greatest current and voltage

The LED which would be the most dim is LED B with low voltage and consequently low current.

<h3>How to determine the current</h3>

The formula for finding current

I = V/R

Where v = voltage

R = resistance

A. V = 12V

R = 4. 7 + 15 = 19. 7 kΩ = 19700 Ω in series

I = \frac{12}{19700}

I = 6. 1 × 10^-4 A

B. V = 9V

R = 4. 7 + 1 = 4. 7 kΩ = 4700Ω in series

I = \frac{12}{4700}

I = 2. 6 × 10^-3 A

C.  V=  12V

1/R = \frac{1}{750} + \frac{1}{1200} + \frac{1}{950 } = 3. 22 × 10^-3

R = \frac{1}{3. 22 * 10 ^-3} = 310. 56 Ω

I = \frac{12}{310. 56}

I = 0. 04 A

It is important to note that the brightness of a bulb depends on both current and voltage depending on whether the bulb it is in parallel or series.

The LED which would glow brightest is LED C with the greatest current and voltage

The LED which would be the most dim is LED B with low voltage and consequently low current.

Learn more about Ohms law here:

brainly.com/question/14296509

#SPJ1

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2 years ago
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