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3 years ago

How do u circulate netforce

Chemistry

1 answer:

emmasim [6.3K]3 years ago

5 0

1Draw a quick sketch of the object.

2Draw an arrow showing every force acting on the object.

3To calculate the net force, add any vectors acting on the same axis (x and y), making sure to pay attention to the directions.

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At a certain temperature the rate of this reaction is first order in HI with a rate constant of :0.0632s2HIg=H2g+I2g Suppose a v

olya-2409 [2.1K]

Answer:

$\boxed{\text{28.0 s}}$

Explanation:

Whenever a question asks you, "How long does it take to reach a certain concentration?" or something like that, you must use the appropriate integrated rate law expression.

The integrated rate law for a first-order reaction is

$\ln \left (\dfrac{[A]_{0}}{[A]} \right ) = kt$

Data:

[A]₀ = 1.28 mol·L⁻¹

[A] = 0.17 [A]₀

k = 0.0632 s⁻¹

Calculation:

$\begin{array}{rcl}\ln \left (\dfrac{[A]_{0}}{0.170[A]_{0}} \right ) & = & 0.0632t\\\\\ln \left (5.882) & = & 0.0632t\\1.772 & = & 0.0632t\\\\t & = & \dfrac{1.772}{0.0632}\\\\t & = & \textbf{{28.0 s}}\\\end{array}\\\text{It will take } \boxed{\textbf{28.0 s}} \text{ for [HI] to decrease to 17.0 \% of its original value.}$

8 0

3 years ago

Positive oxidation number suggest that the element wants to ____ (lose/gain) electrons?

BARSIC [14]

Answer:

lose

Explanation:

its lose because if its positive, assume the electron is a person who has already eaten, theyre full and dont want more, therefore they would want to lose the weight, so its lose.

8 0

3 years ago

After reviewing your answers to questions 2 and 4 above, would you define boiling point and melting point as a periodic table fa

8_murik_8 [283]

Neither, boiling and melting point per element varies from element to element on the periodic table. Family trends and period trends determine what kind of element each aspect is.

7 0

4 years ago

Read 2 more answers

A 100.0-mL flask contains 0.193 g of a volatile oxide of nitrogen. The pressure in the flask is 760 mmHg at 17°C. Is the gas NO,

cestrela7 [59]

Answer:

$NO_2$

Explanation:

Considering,

$n=\frac{m}{M}$

Using ideal gas equation as:

$PV=\frac{m}{M}RT$

where,

P is the pressure = 760 mmHg

V is the volume = 100.0 mL = 0.1 L

m is the mass of the gas = 0.193 g

M is the molar mass of the gas = ?

Temperature = 17 °C

The conversion of T( °C) to T(K) is shown below:

T(K) = T( °C) + 273.15

So,

T = (17 + 273.15) K = 290.15 K

R is Gas constant having value = 62.36367 L. mmHg/K. mol

Applying the values as:-

$760\times 0.1=\frac{0.193}{M}\times 62.36367\times 290.15$

M = 45.95 g/mol

This mass corresponds to $NO_2$ . Hence, the gas must be $NO_2$ .

7 0

3 years ago

Which contribution to the development of atomic theory was the most impactful?

vitfil [10]

Answer:

Who contributed the most to the atomic theory?

After Democritus' discovery, new evidence would be found that would eventually lead to the modern atomic theory. John Dalton, J.J. Thompson, Ernest Rutherford, Niels Bohr, James Chadwick and Ernest Schrodinger each contributed greatly to the modern atomic theory by finding the actual evidence.

Explanation:

4 0

3 years ago