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
Akimi4 [234]
3 years ago
7

Question 4 Solve and report to correct number of significant figure 2.375 + 4.5​

Chemistry
1 answer:
DiKsa [7]3 years ago
8 0

Answer:

6.9 (two sig figs)

Explanation:

2.375 + 4.5 = 6.875 = 6.9

When adding or subtracting, sig figs are determined by the least number of digits past the decimal point.

You might be interested in
Max is helping his parents move to a new house. He picks up one box and is able to carry it into the house. He tries to pick up
Helen [10]

Answer:

The Weight

Explanation:

Even know it has the same volume does not mean it has the same mass and weighs the same with the items inside the box. Most likely, that the Items inside the box are heavier then the first box Max moved.

4 0
3 years ago
An unbalanced equation is shown. In this reaction, 200.0 g of FeS2 is burned in 100.0 g of oxygen, and 55.00 g of Fe2O3 is produ
Crazy boy [7]
<span>4FeS2 + 11O2 = 2Fe2O3 + 8SO2</span>

Percent yield is calculated as the actual yield divided by the theoretical yield multiplied by 100.

Actual yield = 55 g ( 1 mol / 159.69 g ) = 0.34 mol Fe2O3

To find for the theoretical yield, we first determine the limiting reactant.

100 g O2 ( 1 mol / 32 g) = 3.13 mol O2
200 g FeS2 (1 mol / 119.98g) = 1.67 mol FeS2

Therefore, the limiting reactant is O2.

Theoretical yield = 3.13 mol O2 ( 2 mol Fe2O3 / 11 mol O2 ) = 0.57 mol Fe2O3

Percent yield = (0.34 mol / 0.57 mol) x 100 = 59.74%
3 0
3 years ago
How do you convert between the mass and the number of moles of a substance?
Ksivusya [100]
To convert from grams to moles, you divide the number of grams by the molar mass To convert  from moles to grams, you multiply by the molar mass. You must first calculate the molar mass of the substance
6 0
3 years ago
Which of the following statements about alkenes is not correct?
professor190 [17]
<span>Option-C:  They react mainly by substitution.

Explanation:
                     
Alkene doesn't give substitution reactions because they are non polar in nature. The double bond in alkene is responsible for Electrophillic Addition reactions as it electron rich and nucleophilic in nature. Reaction of Alkene is given below,</span>

8 0
3 years ago
If 81g of water is measured out, how many moles are in the sample? *
valkas [14]

Answer:

D

Explanation:

because moles = mass /mr

so 81/18(mr of H2O=2+16)

moles =4.5

hope this helps:)

7 0
3 years ago
Other questions:
  • calculate the grams of oxygen gas present in a 2.50 L sample kept at 1.66 atm pressure and a temperature of 10.0 C
    14·2 answers
  • When scientists look at these examples, what do they know about the atoms? Carbon-12 Carbon-14
    7·1 answer
  • How would planting trees most affect the water cycle? (2 points)
    8·1 answer
  • When the sentence best describes mass movement
    11·1 answer
  • An iodine atom has seven valence electrons. Do you think it will lose seven electrons or gain
    5·1 answer
  • Does the solubility increase whenever the temperature does?
    8·1 answer
  • What is the purpose of neutron radiation?
    11·1 answer
  • Why does the rate of the reaction decrease over time? Why does the rate of the reaction decrease over time? Exothermic reactions
    9·1 answer
  • Differentiate between sandy soil, clayey soil and loamy soil on the basis of the growth of plants????
    15·1 answer
  • Which list represents the
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!