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3 years ago

Water is always subject to the law of

Chemistry

1 answer:

dimulka [17.4K]3 years ago

5 0

Answer:

motion

Explanation:

i just know things

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Methyl violet is an indicator that changes color over a range from pH=0.0 to pH=1.6. What is Ka of methyl violet?

Tju [1.3M]

it's basic in nature

7 0

3 years ago

Hypothermic body temperature can range from 28.7 °C to 35.5 °C. What is this range in degrees Fahrenheit?

Amanda [17]

Solution:

To convert Celsius to Fahrenheit, the formula to be used is (C * 9/5) + 32

So in our given, 28.7 degrees Celsius:

Farenheit = (28.7 * 9/5) + 32
= 51.66 + 32
= 83.66 degrees Fahrenheit

Next, 35.5 degrees Celsius:
Farenheit = (35.5 * 9/5) + 32
= 63.9 + 32
= 95.9 degrees Fahrenheit

So in Fahrenheit, the range would be 83.66 – 95.9 degrees Fahrenheit.

5 0

3 years ago

What is the molecular formula of the compound CH2 with molar mass = 42.0 g/mol? A. C2H18 B. C2H4 C. CAHg O D. C3H6

nika2105 [10]

Answer:

i think c

Explanation:

4 0

3 years ago

Read 2 more answers

What will be the equilibrium temperature when a 245 g block of lead at 300oC is placed in 150-g aluminum container containing 82

loris [4]

Answer:

The correct approach is "12.25°C".

Explanation:

Given:

Mass of lead,

mc = 245 g

Initial temperature,

tc = 300°C

Mass of Aluminum,

ma = 150 g

Initial temperature,

ta = 12.0°C

Mass of water,

mw = 820 g

Initial temperature,

tw = 12.0°C

Now,

The heat received in equivalent to heat given by copper.

The quantity of heat = $m\times s\times t \ J$

then,

⇒ $245\times .013\times (300-T) = 150\times .9\times (T-12.0) + 820\times 4.2\times (T-12.0)$

⇒ $3.185(300-T) = 135(T-12.0) + 3444(T-12.0)$

⇒ $955.5-3.185T=135T-1620+3444T-41328$

⇒ $43903.5 = 3582.185 T$

⇒ $T = 12.25^{\circ} C$

3 0

3 years ago

The answer to the problem: (2.1x103) x (4x105) = _____, written to the correct number of significant digits and in scientific no

Mariulka [41]

Answer: The answer is $8.4\times 10^8$

Explanation:

Significant figures : The figures in a number which express the value -the magnitude of a quantity to a specific degree of accuracy is known as significant digits.

The rule apply for the multiplication and division is :

The least number of significant figures in any number of the problem determines the number of significant figures in the answer.

Thus for product of $(2.1\times 10^3)\times (4\times 10^5)$

In this problem, 2.1has 2 significant figures and 4 is an exact number with infinite significant digits thus product will have the least number of significant figures which is 2. So, the answer will be in 2 significant figures.

Therefore, the answer is $8.4\times 10^8$

3 0

3 years ago