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
KonstantinChe [14]
3 years ago
5

sample with masses 0.12g,1.8g, and 0.562g are mixed together the combind mass of the three samples expressed to the correct numb

er of significant figures should be recorded as
Chemistry
1 answer:
allsm [11]3 years ago
3 0

Answer:

2.5 g

Explanation:

Given data:

Masses of sample = 0.12 g, 1.8 g, 0.562 g

Combine mass of samples = ?

Solution:

When we add or subtract the values the number of significant figures after decimal in result must be equal to the given measurement having less number of decimal places.

0.12 g + 1.8 g + 0.562 g

2.482 g

In given three measurements 1.8 has less number of significant figure after decimal point which is only one digit. Thus the final value must contain one digit after decimal.

we will round of 2.482 g.

2.5 g

because the next digit after 4 is 8 that's why we will round 4 to 5.

You might be interested in
How do you know how to order an empirical formula?
inessss [21]

Answer:

Start with the number of grams of each element, given in the problem. the mass of each element = the percent given. Convert the mass of each element to moles using the molar mass from the periodic table. Divide each mole value by the smallest number of moles calculated.

3 0
2 years ago
Read 2 more answers
PLEASE HELP MEEE!!!!
Assoli18 [71]
It would be 35.8 Calories or calories. Not sure about that part. Hope this helps though.
3 0
3 years ago
Draw the structure for the ring compounds with formulas C6H12 and C6H6
GenaCL600 [577]
The first compound C6H12 is cyclohexane and the other compound C6H6 is benzene. They are both aromatic compounds. Cyclohexane does not have double bonds in its ring while benzene has three double bonds in its ring. This is why the formula for cyclohexane contains 12 carbon atoms while benzene only has 6. 
5 0
3 years ago
To determine the age of fairly recent fossils and organic artifacts, it is possible to analyze the amounts of the isotopes 14C a
dolphi86 [110]

Answer: The net change in the atoms is the conversion of a neutron to a proton, turning Carbon (6 protons) into Nitrogen (7 protons).

Explanation:

Carbon-14, generated from the atmosphere, has 6 protons and 8 neutrons. That's where the 14 comes from, called the mass number, is the sum of protons and neutrons (6+8=14).

Carbon-14 is radioactive and decays by beta decay. That means one of its neutrons spontaneously turns into a proton, an electron, and a neutrino, according to:

^{14} C \rightarrow\ ^{14} N\ +\ e^-  +\ neutrino

After that, the atom has 7 protons and 7 neutrons, maintaining its mass number but changing its atomic number from 6 to 7, turning into Nitrogen.

3 0
3 years ago
What is the pH of a solution with a [H+] of 1.0 x 10-4 M?
MaRussiya [10]
PH = -log [H+]
pH = -log (1.0x10^-4) = -(-4) = 4 or A
4 0
3 years ago
Other questions:
  • For the reaction of oxygen and nitrogen to form nitric oxide, consider the following thermodynamic data (Due to variations in th
    11·1 answer
  • Each of the diagrams below shows an electrically neutral atom. fill in the missing number of protons (n) neutrons (and), electro
    14·1 answer
  • Which of the following is true regarding nominal and real GDP?
    12·1 answer
  • In a sample of liquid water (H2O), which property differs among the water molecules?
    13·1 answer
  • Which is an element? water carbon dioxide air hydrogen?
    8·2 answers
  • What are the intervals on Fahrenheit scale called
    11·1 answer
  • A mixture of 0.10 mol of NO, 0.050 mol of H2, and 0.10 mol of H2O is placed in a 1.0-L vessel at 300 K. The following equilibriu
    12·1 answer
  • Why does the moon appear to be so bright in the sky
    15·2 answers
  • How do all stars form ?
    6·1 answer
  • Molecules of ice have less mass than molecules of water. True or False
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!