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Dvinal [7]
3 years ago
6

An object was measured by a worker as 17.4cm long, however, the manufacturer specifications list the length of the object at 17.

9cm. What is the percent error in the workers measurements? ( In chemistry)
Chemistry
1 answer:
Olin [163]3 years ago
5 0

Answer:

Percent error = 2.8

Explanation:

Given data;

Actual value = 17.9 cm

Measured value = 17.4 cm

Percent error = ?

Solution:

Formula:

Percent error = [actual value - measured value / actual value] × 100

Now we will put the values in formula:

Percent error = [17.9 cm - 17.4 cm / 17.9 cm] × 100

Percent error = [0.5 cm /17.9 cm] × 100

Percent error = 0.028  × 100

Percent error = 2.8

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skad [1K]

Answer:

We are to write the orbital notation and electronic configuration of sulfur and iron.

The orbital notation shows the filling of electrons into orbitals or sublevels.

Electron configuration  shows the distribution of electrons into shells;

       Number of electrons     Electron configuration     Orbital notation

S                  16                                   2 8 6                      1s² 2s² 2p⁶ 3s² 3p⁴

Fe                26                                2, 8, 14 2           1s² 2s² 2p⁶ 3s² 3p⁶3d⁶4s²        

Explanation:

8 0
3 years ago
If you take a 15.0-mL portion of the stock solution and dilute it to a total volume of 0.700 L , what will be the concentration
nadezda [96]

Answer:

0.321M would be the concentration of the final solution

Explanation:

In the problem, you are decreasing the concentration of a solution (The stock solution) by the addition of more solvent (This process is known as dilution).

You are increasing the volume of the solution from 15mL to 700mL, that means the solution <em>is diluted:</em>

700mL / 15mL = 46.67 times

Now, to know the concentration of a final solution we need to take the concentration of the stock solution. <em>Assuming the stock solution is 15M:</em>

15M / 46.67 =

<h3>0.321M would be the concentration of the final solution</h3>
4 0
3 years ago
Changes in DNA are known as mutations and can be sometimes produce beneficial changes in population. A mutant form of the normal
soldier1979 [14.2K]
The dark colored moths are beneficial in a polluted area because they have a lesser chance of being eaten since they blend into the trees polluted with soot. 
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3 years ago
Please help me, I’m stuck on this question
zubka84 [21]

Answer:

\large \boxed{\text{0.0820 L$\cdot$atm$\cdot$K$^{-1}$mol}^{-1 }}

Explanation:

To solve this problem, we can use the Ideal Gas Law:

pV = nRT

Data:

p = 3.00 atm

V = 17.4 L

n = 2.00 mol

T = 45 °C

Calculations:

1. Convert the temperature to kelvins

T = (45 + 273.15) K = 318.15 K

2. Calculate the value of R

\begin{array}{rcl}pV & = & nRT\\\text{3.00 atm} \times \text{17.4 L} & = & \text{2.00 mol} \times R \times \text{318.15 K}\\\text{52.2 L$\cdot$atm} & = & 636.30R \text{ K$\cdot$mol}\\R & = & \dfrac{\text{52.2 L$\cdot$atm}}{636.30 \text{ K$\cdot$mol}}\\\\ & = & \textbf{0.0820 L$\cdot$atm$\cdot$K$^{-1}$mol}^{-1} \\\end{array}\\\text{The value of the gas constant R is $\large \boxed{\textbf{0.0820 L$\cdot$atm$\cdot$K$^{-1}$mol}^{-1 }}$}

7 0
3 years ago
What is potential energy?
Jobisdone [24]

QUESTION ; WHAT IS POTENTIAL ENERGY?

ANSWER : LETTER "A"

EXPLANATION :

potential energy, stored energy that depends upon the relative position of various parts of a system. Potential energy is a property of a system and not of an individual body or particle; the system composed of Earth and the raised ball, for example, has more potential energy as the two are farther separated.

tysm^^

4 0
3 years ago
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