1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
inn [45]
4 years ago
8

An object was measured by a worker as

Chemistry
2 answers:
Lapatulllka [165]4 years ago
8 0

Answer: The percent error in the worker's measurement is 1.38%

Explanation:

Actual length of the object = 14.4 cm

length measured by the worker = 14.6 cm

absolute error in measuring the object = 14.6 - 14. 4 = 0.2 cm

percentage error =\frac{\text {absolute error}}{\text {actual length}}\times 100\%

Putting in the values we get:

percentage error =\frac{0.2}{14.4}\times 100\%=1.38\%

Thus the percent error in the worker's measurement is 1.38%

marusya05 [52]4 years ago
6 0
<h2>Answer - 0.73%</h2>

14.6            .2

          =          

100              x

(Above is proportions I used to get the answer)

x = 0.73% which is the answer.

You might be interested in
which example would most likely decrease friction? using cleats, rather than gym shoes, on a field using shaving cream, rather t
rosijanka [135]
"<span>using shaving cream, rather than shaving on dry skin" I believe this is the answer. coz rest of them would increase friction rather than decrease</span>
4 0
3 years ago
Read 2 more answers
A certain substance X has a normal freezing point of 5.6 °C and a molal freezing point depression constant Kf-7.78 °C-kg·mol-1.
Harrizon [31]

Answer:

27.60 g urea

Explanation:

The <em>freezing-point depression</em> is expressed by the formula:

  • ΔT= Kf * m

In this case,

  • ΔT = 5.6 - (-0.9) = 6.5 °C
  • Kf = 7.78 °C kg·mol⁻¹

m is the molality of the urea solution in X (mol urea/kg of X)

First we<u> calculate the molality</u>:

  • 6.5 °C = 7.78 °C kg·mol⁻¹ * m
  • m = 0.84 m

Now we<u> calculate the moles of ure</u>a that were dissolved:

550 g X ⇒ 550 / 1000 = 0.550 kg X

  • 0.84 m = mol Urea / 0.550 kg X
  • mol Urea = 0.46 mol

Finally we <u>calculate the mass of urea</u>, using its molecular weight:

  • 0.46 mol * 60.06 g/mol = 27.60 g urea

7 0
3 years ago
If the pressure of a gas sample is quadrupled and the absolute temperature is doubled, by what factor does the volume of the sam
Natasha_Volkova [10]

Answer:

D) 1/2

Explanation:

Using Ideal gas equation for same mole of gas as

\frac {{P_1}\times {V_1}}{T_1}=\frac {{P_2}\times {V_2}}{T_2}

Given,

P₂ = 4P₁

T₂ = 2T₁

Using above equation as:

\frac {{P_1}\times {V_1}}{T_1}=\frac {{P_2}\times {V_2}}{T_2}

\frac {{P_1}\times {V_1}}{T_1}=\frac {{4\times P_1}\times {V_2}}{2\times T_1}

V_2=\frac{1}{2}\times V_1

<u>The volume change by half of the original.</u>

7 0
3 years ago
Read 2 more answers
The specific heat capacity of titanium is 0.523j/g c what is the heat capacity of 2.3g of titanium
kodGreya [7K]

Answer:

1.2029 J/g.°C

Explanation:

Given data:

Specific heat capacity of titanium = 0.523 J/g.°C

Specific heat capacity of 2.3 gram of titanium = ?

Solution:

Specific heat capacity:

It is the amount of heat required to raise the temperature of one gram of substance by one degree.

Formula:

Q = m.c. ΔT

Q = amount of heat absorbed or released

m = mass of given substance

c = specific heat capacity of substance

ΔT = change in temperature

1 g of titanium have 0.523 J/g.°C specific heat capacity

2.3  × 0.523 J/g.°C

1.2029 J/g.°C

8 0
3 years ago
PLEASE HELP TEST<br> does anyone know the answer???? density question
CaHeK987 [17]

Answer:

The answer is honey.

Explanation:

8 0
3 years ago
Read 2 more answers
Other questions:
  • A cylinder with a movable piston contains 2.00 g of helium, He, at room temperature. More helium was added to the cylinder and t
    11·1 answer
  • • What would you predict if you used a starch solution instead of the protein?
    12·1 answer
  • Gaseous methane CH4 reacts with gaseous oxygen gas O2 to produce gaseous carbon dioxide CO2 and gaseous water H2O. If 12.4g of c
    7·1 answer
  • Ac sample of octane that has a mass of 0.750 g is burned in a bone calorimeter. As a result, the temperature if the calorimeter
    10·2 answers
  • TUL
    13·1 answer
  • Suppose that the root-mean-square velocity vrms of water molecules (molecular mass is equal to 18.0 g/mol) in a flame is found t
    6·1 answer
  • Calculate the number of grams of C2H6 in 4.6 miles of C2H6
    10·1 answer
  • What is the mass of sulfuric acid, H2SO4, that is contained in 2.0 L of a 5.85 M solution ?
    10·2 answers
  • Air trapped in a cylinder fitted with a piston occupies 142.8 mL at 0.97 kPa pressure.
    15·1 answer
  • PLEASE HELP ME NO LINKS
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!