All categories

3 years ago

What is the solution to the problem to the correct number of significant figures (102,900/12)+(170•1.27)

1 answer:

8 0

As per as the Multiplication rules of the significant figures, whenever any numbers in the decimals forms are multiplied or divided then result in mentioned in such a way so that the significant figures after the decimal will be same as that in the given least condition.

_______________________________

102900/12 = 8575

170 × 1.27 = 215.9

∴ (102,900 ÷ 12) + (170 × 1.27) = 8575 + 215.9

= 8790.9

Now, As per as Above rules, answer in correct significant figures will be = 8791.

You might be interested in

What is the volume of 11.2 g of O2 at 7.78 atm and 415 K?

irina1246 [14]

Answer:

1.53 L

Explanation:

Step 1: Given data

Mass of oxygen (m): 11.2 g

Pressure (P): 7.78 atm

Temperature (T): 415 K

Ideal gas constant (R): 0.0821 atm.L/mol.K

Step 2: Calculate the moles (n) corresponding to 11.2 g of oxygen

The molar mass of oxygen is 32.00 g/mol.

11.2 g × (1 mol/32.00 g) = 0.350 mol

Step 3: Calculate the volume of oxygen

We will use the ideal gas equation.

P × V = n × R × T

V = n × R × T / P

V = 0.350 mol × (0.0821 atm.L/mol.K) × 415 K / 7.78 atm

V = 1.53 L

3 0

3 years ago

What attracts heat more? black or aluminum foil?

Inessa05 [86]

Answer:

"ALUMINUM FOIL" will conduct heat much more effectively than black construction paper.

8 0

2 years ago

Read 2 more answers

Which of the following represents a physical change?

julsineya [31]

A. Phase changing. When phase changes nothing chemically changes about the substance, its still the same thing.

8 0

3 years ago

Read 2 more answers

What type of elements form metallic bonds?

astra-53 [7]

Answer:

Aluminum , iron , gold , silver , nickels etc are the type of elements form metallic bonds .

8 0

2 years ago

"acid is responsible for the odor in rancid butter. a solution of 0.25 m butyric acid has a ph of 2.71. what is the ka for"

Salsk061 [2.6K]

Answer:- The Ka for the acid is $1.53*10^-^5$ .

Solution:- In general, monoprotic acid could be represented by HA. The dissociation equation for the ionization of HA is written as:

HA(aq)\rightarrow H^+(aq) + A^-(aq)

Now, we make the ice table for this equation as:

HA(aq)\rightarrow H^+(aq) + A^-(aq)

I 0.25 0 0

C -X +X +X

E (0.25 - X) X X

where, I stands for initial concentration, C stands for change in concentration and E stands for equilibrium concentration.

X is the change in concentration and from ice table it's same as the concentration of hydrogen ion that is calculated from given pH.

$Ka = [H^+][A^-]\frac{1}{HA}$

Where, Ka is the acid ionization constant. Let's plug in the values.

$Ka = \frac{X^2}{0.25-X}$

Let's calculate the value of X first using the equation:

$pH = -log[H^+]$ [/tex]

on taking antilog ob above equation we get:

$[H^+]=10^-^p^H$

$[H^+]=10^-^2^.^7^1$

$[H^+]$ = 0.00195

So, X = 0.001195

Let's plug in this value of X in the equation:-

$Ka=\frac{(0.00195)^2}{0.25-0.00195}$

$Ka=1.53*10^-^5$

So, the value of Ka for butyric acid is $1.53*10^-^5$ .

8 0

3 years ago

Read 2 more answers