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
Degger [83]
3 years ago
14

I need help! how many moles are in 3.4*10^-7 grams of silicon dioxide, SiO2. I got 2.0^17 but I think it's wrong :(

Chemistry
1 answer:
blondinia [14]3 years ago
8 0
Molar mass SiO2 = 28 + 32 = 60 

<span>so moles sand = 3.4 x 10-7 / 60</span>
You might be interested in
How many moles of carbon dioxide should be produced from the decomposition of 0.100 g of sodium bicarbonate?
Gre4nikov [31]
The chemical symbol for sodium bicarbonate is NaHCO3. Its molar mass is 84 g/mol. In each of one mol of sodium bicarbonate their is one mole of carbon dioxide with the molar mass of 44 grams per mol. We determine the number of moles in 0.10 g of sodium bicarbonate. 
                         n sodium bicarbonate = (0.10 g) / (84 grams / mol)
                                                            = 1.19 x 10-3 moles sodium bicarbonate
Therefore, there are also 1.19 x 10-3 moles of carbon dioxide. 
3 0
3 years ago
_______________________ turns blood to cherry red and produces a patchy, pinkish color in the lividity of the corpse.a. Carbon m
IgorC [24]

Answer: a. Carbon monoxide

Explanation:

The carbon monoxide gas competes with the oxygen in the blood to occupy the binding affinity of the hemoglobin thus the blood changes it's color to cherry red.

In postmortem lividity, the body becomes discolored due to the effect of flow of blood from the interstitial tissues and suspended under the force of gravity. This can be seen on the dependent parts of the body and the position of body after death. The color of the postmortem lividity depends on the color of the hemoglobin.

In case of carbon monoxide poisoning the color of postmortem lividity appears to be cherry red as color of the hemoglobin is cherry red. Thus cherry red or dark pinkish patches appear in the corpse as lividity.

8 0
2 years ago
The Tacoma narrows bridge collapsed due to?
vovangra [49]

Explanation: aeroflastic flutter

8 0
3 years ago
Read 2 more answers
How many moles are in 25.90 grams of NaCl
inessss [21]

Answer:

0.44316859040048207mol

Explanation:

7 0
2 years ago
If the % acetic acid listed on a vinegar bottle is 4%, what is the implied uncertainty of the acetic acid concentration
Tom [10]

Answer:

This question appears incomplete

Explanation:

This question appears incomplete because the data provided only makes it possible to calculate the certainty of the acetic acid content per total volume of the vinegar. Thus, the 4% means for every 100 mL of the vinegar, there is 4 mL of acetic acid present. To calculate the volume of acetic acid in any other volume of vinegar, the formula will be

volume of acetic acid = 4/100 × total volume of vinegar

6 0
2 years ago
Other questions:
  • Which of the following best explains why electroplating is a useful process in many industries?
    6·2 answers
  • What is the answer??
    8·2 answers
  • Ans with solution...
    10·1 answer
  • A volume of 5.0 L of gas at a temperature of 25°C is cooled to a temperature of -120°C at constant pressure. What is the new vol
    13·1 answer
  • If a sample of C-14 initially contains 1.5 mmol of C-14, how many millimoles will be left after 2255 years?
    11·1 answer
  • Which statement about covalent bonds and electrons is true?
    9·2 answers
  • Which energy transformation occurs in an electric motor?
    13·1 answer
  • Please help me ASAP! Thank you!
    14·2 answers
  • Which graph above shows an object’s acceleration?
    10·2 answers
  • At room temperature (20°C) and pressure, the density of air is 1.189 g/L. An object will float in air if its density is less tha
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!