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
brilliants [131]
2 years ago
11

Determination of your estimate determines the BLANK and BLANK of a piece of equipment.

Chemistry
1 answer:
Zina [86]2 years ago
4 0

Answer:

scalpel,mask

Explanation:

You might be interested in
Who discovered that geologic changes are cyclical?
slega [8]
I believe it was James Hutton
7 0
3 years ago
Choose the selection which correctly characterizes all three of the following substances in terms of whether they are polar or n
ohaa [14]

Answer:

SiH4 is nonpolar and BBr3 is nonpolar and SiF4 is nonpolar.

Explanation:

SiH4 is a non-polar compound. Though the Si–H bonds are polar, as a result of different electronegativities of Si and H. However, as there are 4 electron repulsions around the central Si atom, the polar bonds are arranged symmetrically around the central atom having a tetrahedral shape hence they cancel out making the compound nonpolar.

SiF4 is a nonpolar molecule because the fluorine atoms are arranged symetrically around the central silicon atom in a tetrahedral molecule with all of the regions of negative charge cancelling each other out just like in SiH4.

The 3 bromine atoms all lie in the same plane thus the geometry of the compound will be trigonal planar. The BBr3 will be non polar because the three B-Br bonds will cancel out each others' dipole moment given that they are in the same plane.

4 0
3 years ago
Read the chemical equation. Fe2O3 + CO → Fe + CO2 If 2 moles of Fe2O3 react with 9 moles of CO, how many moles of each product a
cluponka [151]

Answer:

4 moles Fe and 6 moles CO2 are the moles of each products formed

Explanation:

Fe2O3 + 3CO → 2Fe + 3CO2

1st step Ballance the equation. Afterwards, you can work properly

1 mol of Fe2O3 reacts with 3 moles of CO to make 2 moles of Fe and 3 moles of CO2

2nd step Predict the reactant in excess and limitant reagent.

If 1 moles of Fe2O3 reacts with 3 moles of CO

2 moles of Fe2O3 reacts with 6 moles of CO     (2.3) /1

I have 9 moles of CO, so the Fe2O3 is my limitant reagent.

<u><em>REMEMBER</em></u> you always have to work with the limitant.

If 3 moles of CO reacts with 1 mol of Fe2O3

9 moles of CO reacts with 3 moles of Fe2O3     (9.1) /3

I have 2 moles of Fe2O3, so I still have Fe2O3, by the way the CO is the reactant in excess. (Just to show all)

3rd step Work with the limitant reagent.

1 mol of Fe2O3 ___ makes____ 2 moles of Fe  +  3 moles of CO

2 mol of Fe2O3 ___ makes ___ 4 moles of Fe  +  6 moles of CO

5 0
2 years ago
Light energy comes from
Varvara68 [4.7K]

Answer:

the answer of the questionis D Photons

4 0
3 years ago
Ben is exercising his pony on a large, oval track. The pony is trotting at a constant speed of 10 m/s around the track. Which st
alexira [117]
C) the pony is acclerating around the track
7 0
3 years ago
Read 2 more answers
Other questions:
  • Which process does a cell use to extract energy from food in order to maintain homeostasis?
    6·2 answers
  • Which type of fuel must be the most carefully contained and protected
    15·1 answer
  • Choose ALL the answers that apply.
    5·1 answer
  • PI3Cl2 is a nonpolar molecule. Based on this information, determine the I−P−I bond angle, the Cl−P−Cl bond angle, and the I−P−Cl
    6·1 answer
  • What type of substance is always made up of a single type if atom
    8·1 answer
  • Why are mole ratios important to stoichiometry calculations?
    10·1 answer
  • Determine the point groups for a. Ethane (staggered conformation) b. Ethane (eclipsed conformation) c. Chloroethane (staggered c
    8·1 answer
  • A 2-g sample of sucrose is 6.50% hydrogen. What is the mass percentage of hydrogen in 300 g of sucrose? Show all work to support
    11·1 answer
  • Pls help noww<br>Just want to see who's the smartest here<br>promise to tag u as brainliest​
    15·1 answer
  • Can someone answer these questions about the LACK OF CLEAN DRINKING WATER? PLS. I will give 30 pts.
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!