Expressed to the correct number of significant figures, the sum of two masses is 445.2 grams
1) 210.10 g+235.100g
2)210.100 g + 235.10 g
3) 210.1 g + 235.1 g
4) 210.10 g+ 235.10 g
I think the answer is 2 but I don't know the reason why.
Homework Answers
the results for the others are
1)445.20
2)445.20
4)445.20
Add Answer to:
Expressed to the correct number of significant figures, the sum of two masses is 445.2 grams
In a 2.86E+1 g sample of NaHCO3, how many grams of sodium are present? Use two...
In a 2.86E+1 g sample of NaHCO3, how many grams of sodium are present? Use two decimal places in atomic masses. Only give the numeric value of your answer. Don't include the units. i Respond with the correct number of significant figures in scientific notation (Use E notation and only 1 digit before decimal e.g. 2.5e5 for 2.5 x 105) In a 1.018E+2 g sample of iron(111) oxide, how many grams of iron are present? Your answer should have the...
Express the following sum with the correct number of significant figures: 1.82 m + 143.9 cm...
Express the following sum with the correct number of significant figures: 1.82 m + 143.9 cm + 5.30×105 μm Submit Answer Tries 0/2
Which of the following numbers contains the designated correct number of significant figures?
Question 7 Which of the following numbers contains the designated correct number of significant figures? 1.04 2 significant figures 0.00302 2 significant figures 0.04300 5 significant figures 156 000 3 significant figures 3.06504 significant figures Question 9 What is the mass of 53 mL of ethanol, which has a density of 0.79 g/mL? 42g 53 g 41.9 g 67.1 g 67 g
Express the following sum with the correct number of significant figures: 1.80m+132.1cm+5.33×10^5μm
Express the following sum with the correct number of significant figures: 1.80m+132.1cm+5.33×10^5μm
Show your work. Use the correct number of significant figures in your answers. Aluminum metal reacts...
Show your work. Use the correct number of significant figures in your answers. Aluminum metal reacts with chlorine gas to form solid aluminum chloride. 1. Write the balanced equation including states of matter. 2. If 70.0 grams of aluminum reacts with excess chlorine gas, how many grams of aluminum chloride will form? 3. How many grams of chlorine will react completely with 85.6g of aluminum? Sodium hydroxide reacts with sulfuric acid to produce water and sodium sulfate. 4. Write the...
There are two rules for determining the number of significant figures: ) If there is no...
There are two rules for determining the number of significant figures: ) If there is no decimal point-start at the RIGHT and count, beginning with the first non-zero digit. Examples 340 30400 34955 2 sf. 3 sf. 5 sf 2) If there is a decimal point--start at the LEFT and count, beginning with the first non-zero digit. Examples 340 3 sf. 5 s.f. 5 s.f 2 sf. 30400. 0.34955 0.00040 Determine the number of significant figures (s.f.) in each of...
Be sure to give your answers with the correct number of significant figures. 1. Over the...
Be sure to give your answers with the correct number of significant figures. 1. Over the years, the thermite reaction has been used for welding railroad rails, in incendiary bombs, and to ignite solid-fuel rocket motors. The reaction is: Fe20. (s) + 2Al(s) – 2Fe (1) + Al O2 (s) a. How many moles of iron (III) oxide must react in order to produce 3.5 mol of Fe? (1.25pts) b. What mass of iron (III) oxide reacted in order to...
Which of the answers for the following conversions contains the correct number of significant figures
Which of the answers for the following conversions contains the correct number of significant figures? A)2.543 m x 39.4in/1m=100.1924in B)2 L x 1.06qt/1L=2.12 qt C)24.95 min x 1hr/60 min=0.4158 hr D)12.0 ft x 12in/1ft x 2.54cm/1in=370cm E)24.0 kg x 1lb/2.20kg=11lbthe answer is c but i dont understand why. i thought you round the answer based on the number of sig figs of the lowest measurement so why wouldn't D be the answer?
Use units and la Report final answer with the correct number of significant figures, unit and...
Use units and la Report final answer with the correct number of significant figures, unit and chemical formula NSD Limiting Reactant Calculations 2 NO(g) + 5 H2(g)2 NH(g) +2 H2O(g) Starting with 75.4 g NO and 15.5 g H2, what is the theoretical yield of NHs in grams? Calculation based NO upon Calculation based upon H2 What is the limiting reactant? What is the theoretical yield?
a) A is a quantity with two significant figures. B has 4 significant figures. If C =...
a) A is a quantity with two significant figures. B has 4 significant figures. If C = A + B, D = A*B, and E=B/A What should the number of significant figures of C, D and E be? b) Compare and contrast the following pairs of definitions, one set at a time. For each set of definitions, describe what kind of measurements ( time, positions etc) must you do in order to compute the quantity based on their definitions. Be as...
In a 2.86E+1 g sample of NaHCO3, how many grams of sodium are present? Use two decimal places in atomic masses. Only give the numeric value of your answer. Don't include the units. i Respond with the correct number of significant figures in scientific notation (Use E notation and only 1 digit before decimal e.g. 2.5e5 for 2.5 x 105) In a 1.018E+2 g sample of iron(111) oxide, how many grams of iron are present? Your answer should have the...
Express the following sum with the correct number of significant figures: 1.82 m + 143.9 cm + 5.30×105 μm Submit Answer Tries 0/2
Show your work. Use the correct number of significant figures in your answers. Aluminum metal reacts with chlorine gas to form solid aluminum chloride. 1. Write the balanced equation including states of matter. 2. If 70.0 grams of aluminum reacts with excess chlorine gas, how many grams of aluminum chloride will form? 3. How many grams of chlorine will react completely with 85.6g of aluminum? Sodium hydroxide reacts with sulfuric acid to produce water and sodium sulfate. 4. Write the...
There are two rules for determining the number of significant figures: ) If there is no decimal point-start at the RIGHT and count, beginning with the first non-zero digit. Examples 340 30400 34955 2 sf. 3 sf. 5 sf 2) If there is a decimal point--start at the LEFT and count, beginning with the first non-zero digit. Examples 340 3 sf. 5 s.f. 5 s.f 2 sf. 30400. 0.34955 0.00040 Determine the number of significant figures (s.f.) in each of...
Be sure to give your answers with the correct number of significant figures. 1. Over the years, the thermite reaction has been used for welding railroad rails, in incendiary bombs, and to ignite solid-fuel rocket motors. The reaction is: Fe20. (s) + 2Al(s) – 2Fe (1) + Al O2 (s) a. How many moles of iron (III) oxide must react in order to produce 3.5 mol of Fe? (1.25pts) b. What mass of iron (III) oxide reacted in order to...
Use units and la Report final answer with the correct number of significant figures, unit and chemical formula NSD Limiting Reactant Calculations 2 NO(g) + 5 H2(g)2 NH(g) +2 H2O(g) Starting with 75.4 g NO and 15.5 g H2, what is the theoretical yield of NHs in grams? Calculation based NO upon Calculation based upon H2 What is the limiting reactant? What is the theoretical yield?
Most questions answered within 3 hours.
-
Find the complete optimal solution to this linear programming
problem. Max 5x + 3y s.t. 2x...
asked 2 minutes ago -
The pH of an acetate buffer was determined to be 4.76. Then, a
few drops of...
asked 5 minutes ago -
a sample of size 1500 is used to find a confidence
interval for the percentage of...
asked 14 minutes ago -
Explain in detail the differences between qualitative and
quantitative forecasts. Include at least two examples of...
asked 18 minutes ago -
Differentiate between response time and throughput.
Explain how the physical design of a database influences
performance...
asked 20 minutes ago -
Write MATLAB code to plot the following
waveforms.
Rectangular pulses:
????(?)
????(? − ?)
????(?/?) ...
asked 20 minutes ago -
4. Adam’s Inc.’s outstanding common stock is currently selling
in the market for $28. Dividends of...
asked 31 minutes ago -
question
you were
asked to create a regression that will predict the amount of saving
for...
asked 39 minutes ago -
If tcalc = -2.78, tcrit = 1.96, H0: Mu > Mu0, and Xbar <
Mu0, what...
asked 1 hour ago -
Circular distribution
•Suppose two birds are flying, one is flying from the north and
the other...
asked 59 minutes ago -
please answer all... it all counts as a discussion problem
1a qualitative data and proportions: Suppose...
asked 1 hour ago -
Typing The Answer Is Mandatory
Temperature is a measure of heat. More heat means that more...
asked 54 minutes ago