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
Murrr4er [49]
4 years ago
8

A pound is approximately 0.45 kilogram. A person weighs 87 kilograms. What is the persons weight, in pounds, when expressed to t

he correct number of significant figures.
Chemistry
1 answer:
pishuonlain [190]4 years ago
7 0
To work it out you’d go

87 ÷ 0.45
= 193.333… lbs

i don’t know how many significant figures you have to do but if it’s 3 significant figures then the answer is 193lbs

lbs = pounds
You might be interested in
Please answer step by step.
Digiron [165]

3 moles of NaOH reacts with 1 mole of phosphoric acid.

<h3>What is the moles ratio of the NaOH and Phosphoric acid reaction?</h3>

The moles ratio of the reaction between NaOH and Phosphoric acid is given by the equation of the reaction below:

3\:NaOH + H_{3}PO_{4} \rightarrow Na_{3}PO_{4} + 3\:H_{2}O \\

Based on the equation of the reaction, 3 moles of NaOH reacts with 1 mole of phosphoric acid.

Learn more about mole ratio at: brainly.com/question/19099163

#SPJ1

3 0
2 years ago
What makes the periodic table such a useful tool? *
Sidana [21]

Answer:

I think it is D. It allows you to compare the properties of the elements. I might be wrong.

5 0
4 years ago
Someone please help me with this !
meriva

Answer:

1) 7.256 mol Br2 (Cl2)/(Br2)

The Br2 cancels out, so we have 7.256(2)

This is 14.512.

2) Number of moles = mass / molar mass

Number of moles = 239.7 g/ 35.5 g/mol

Number of moles =  6.8 mol

BrCl=13.6 mol

13.6(11.5.357)

1568.9 g

3) Repeat the same process with problem 2, given that there are 6.022x10^23 atoms in a mole.

Explanation:

Br2 + Cl2 → 2BrCl

4 0
3 years ago
If you repeat an experiment and the result are very different from the result you got the first time the next step would be to w
Bess [88]
You would want to make sure that you have controlled the variables properly, and if you determine that you did then you would repeat the experiment to be sure of the results.
4 0
3 years ago
Ethylene glycol flows at 0.01 kg/s through a 3-mm diameter, thin-walled tube. The tube is coiled and submerged in well-stirred w
leonid [27]

Answer:

heat rate= 1281W

length = 15.8m

Explanation:

we have this data to answer this question with

Tmi = 85 degrees

Tmo = 35 degrees

Ts = 25 dgrees

flow rate = 25 degrees

using engine oil property from table a-5

Tm = Tmo - TMi/2 = 333k

u =0.522x10⁻²

k = 0.26

pr = 51.3

cp = 2562 J/kg.k

mcp(Tmo-Tmi) =

0.01 x 2562(35-85)

= 1281 W

we find the change in Tim

= [(35-25)-(85-25)]/ln[(35-25)/(85-25)]

= -50/ln0.167

= -50/-1.78976

= 27.9°c

we finf the required reynold number

4x0.01/πx0.003x0.522x10⁻²

= 0.04/0.00004921

= 812.8

= 813

we find approximate correlation

NuD = hd/k

NuD = 3.66

3.66 = 0.003D/0.26

cross multiply

0.003D = 3.66x0.26

D = 3.66x0.26/0.003

= 317.2

As = 1281/317x27.9

= 0.145

As = πDL

L = As/πD

= 0.145/π0.003

= 0.145/0.009429

L = 15.378

4 0
3 years ago
Other questions:
  • The molar mass of a compound is 92 g/mol. Analysis of a sample of the compound indicates that it contains 0.606g of N and 1.390g
    14·2 answers
  • How many grams of propane (c3h8) are required to produce 39.4g of water
    12·1 answer
  • Loess helps to form very fertile soil. Please select the best answer from the choices provided T F
    10·2 answers
  • A mineral that has no planes of weakness in its lattice structure will not break along planes. Which term is appled to the way i
    11·2 answers
  • How do optical telescopes work ?
    12·1 answer
  • What moon phases would this be and why?
    14·1 answer
  • How many molecules are in the following formula?<br> 2(NH4)3PO4
    6·1 answer
  • What is the number of moles in 0.025 g (NH4)2Cr2O7?
    10·1 answer
  • How many significant figures are in the following number?
    6·1 answer
  • Age
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!