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
kherson [118]
3 years ago
6

Be sure to answer all parts.

Chemistry
1 answer:
Llana [10]3 years ago
4 0

Answer:

16 g has 2 sig figs

6701g has 4 sig figs

560 has 2 sig figs

Explanation:

You might be interested in
He partial pressure of oxygen gas in our atmosphere is 0.21 atm. this is the partial pressure at which human lungs have evolved
solong [7]
Hello!

The partial pressure of helium to keep the partial pressure of oxygen at 0,21 atm in a scuba-diver tank is 8,09 atm

To solve this question, we can use the Dalton's Law, which states that the total pressure in a container with a mixture of gases is the sum of the partial pressures o each individual gas. For the case of this mixture the Dalton's Law is as follows:

P_{tot}=P_{He} +P_{O_2}

In this equation, we need to clear for PHe, knowing that the PO₂ should be 0,21 atm, to find the required pressure of Helium:

P_{He}=P_{tot} -P_{O_2}=8,30atm-0,21atm=  8,09 atm

Have a nice day!
6 0
4 years ago
_al(s)+_HCL(aq) AlCl3(aq)+_H2(g)
Novay_Z [31]
2Al + 6HCl -> 2AlCl3 + 3H2
5 0
3 years ago
Zinc reacts with hydrochloric acid according to the reaction equation Zn ( s ) + 2 HCl ( aq ) ⟶ ZnCl 2 ( aq ) + H 2 ( g ) How ma
Katen [24]

Answer: 12.0 milliliters of 6.50 M HCl ( aq ) are required to react with 2.55 g Zn.

Explanation:

moles =\frac{\text {given mass}}{\text {Molar mass}}

moles of zinc =\frac{2.55g}{65.38g/mol}=0.0390moles

The balanced chemical equation is :

Zn(s)+2HCl(aq)\rightarrow ZnCl_2(aq)+H_2(g)

According to stoichiometry:

1 mole of zinc reacts with = 2 moles of HCl

Thus 0.0390 moles of zinc reacts with = \frac{2}{1}\times 0.0390=0.0780 moles of HCl

To calculate the volume for given molarity, we use the equation:

\text{Molarity of the solution}=\frac{\text{Moles of solute}\times 1000}{\text{Volume of solution in ml}}     .....(1)

Molarity of HCl solution = 6.50 M

Volume of solution = ?

Putting values in equation 1, we get:

6.50M=\frac{0.0780\times 1000}{\text{Volume of solution in ml}}

{\text{Volume of solution in ml}}=12.0ml

Thus 12.0 ml of 6.50 M HCl ( aq ) are required to react with 2.55 g Zn

3 0
3 years ago
How many valence electrons should you use to draw a Lewis structure of ammonia (NH3)?
Mekhanik [1.2K]
Hello there,


Your correct answer would be 8.<span> There are </span>8 valence electrons<span> available for the Lewis structure for NH</span>3<span>.

Hope this helps

~Hottwizzlers</span>
4 0
3 years ago
Read 2 more answers
If a material conducts heat easily, its a good _____. <br> It has to be a 18 letter word
Nonamiya [84]

Answer:

a thermal conductor

Explanation:

thats what its called

7 0
3 years ago
Other questions:
  • Brainliest will be given! Please help!
    6·1 answer
  • At 8:00, the temperature was 6 degrees Celsius (°C). Three hours later, the temperature was -13°C.
    13·2 answers
  • Benzene and toluene form ideal solutions. Consider a solution of benzene and toluene prepared at 25 ^ { \circ } \mathrm { C }25∘
    12·1 answer
  • Oxidation number of Ni in Ni(CO)4 is​
    11·1 answer
  • A solution has [H3O+] = 1 x 10-4 M. What is the pOH?
    9·1 answer
  • What happens when the south end of Earth’s axis is tilted toward the Sun?
    11·2 answers
  • Which of the following observations indicates that atoms of all elements contain small, negatively charged particles?
    6·1 answer
  • A bomb calorimeter, or a constant volume calorimeter, is a device often used to determine the heat of combustion of fuels and th
    13·1 answer
  • How much heat is required to change 235 g of iodine at 25 degrees celsius into vapor at 198 degrees celsius? The melting point i
    12·1 answer
  • Which island is the oldest??
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!