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
gayaneshka [121]
2 years ago
7

Help asap can some one help asap pls if you do all i will give brainliest

Chemistry
1 answer:
lions [1.4K]2 years ago
7 0

Answer:

for the continental drift one (slide 13) the answer is large <u>piece </u>  for the second one it's

continents then <u>separated</u>

<u />

Explanation:

You might be interested in
9. Which of the following is true?
wlad13 [49]
The answer should be C
6 0
3 years ago
If the molar mass of NaCl is 58.44 g/mol, what amount of NaCl (in mol) is contained in 250.0 mg of NaCl?
4vir4ik [10]

Answer: 0.004 moles

Explanation:

Amount of substance= mass/ molar mass

Mass= 250mg or 0.25g

Molar mass= 58.44gmol-1

Amount= 0.25/58.44

= 0.004 moles

5 0
2 years ago
Determine the empirical formula of a compound that contains 30.45% nitrogen and 69.55% oxygen
melomori [17]

I might not be right but I think the empirical formula is NO2

5 0
2 years ago
What is the best way to measure the age of the Earth and why? Explain how scientists do this.
UkoKoshka [18]

Explanation:

the best way to understand the age of the earth is to estimate the age of matirials in it

3 0
2 years ago
A sample of N2 gas in a flask is heated from 27 Celcius to 150 Celcius. If the original gas is @ pressure of 1520 torr, what is
Romashka [77]

Answer:

\large \boxed{\text{B.) 2.8 atm}}

Explanation:

The volume and amount are constant, so we can use Gay-Lussac’s Law:

At constant volume, the pressure exerted by a gas is directly proportional to its temperature.

\dfrac{p_{1}}{T_{1}} = \dfrac{p_{2}}{T_{2}}

Data:

p₁ = 1520 Torr; T₁ =   27 °C

p₂ = ?;               T₂ = 150 °C

Calculations:

(a) Convert the temperatures to kelvins

T₁ = (  27 + 273.15) K = 300.15 K

T₂ = (150 + 273.15) K = 423.15 K

(b) Calculate the new pressure

\begin{array}{rcl}\dfrac{1520}{300.15} & = & \dfrac{p_{2}}{423.15}\\\\5.064 & = & \dfrac{p_{2}}{423.15}\\\\5.064\times423.15&=&p_{2}\\p_{2} & = & \text{2143 Torr}\end{array}\\

(c) Convert the pressure to atmospheres

p = \text{2143 Torr} \times \dfrac{\text{1 atm}}{\text{760 Torr}} = \textbf{2.8 atm}\\\\\text{The new pressure reading will be $\large \boxed{\textbf{2.8 atm}}$}

7 0
2 years ago
Other questions:
  • Hi can you slove this please. ..​
    15·1 answer
  • The effect of atoms colliding with the walls of a container is called ______.
    11·2 answers
  • Ow many grams of NaOH would be needed to react with 199 g of HCl?
    5·2 answers
  • Phenyl-methane-sulfonyl-fluoride (PMSF) inactivates serine proteases by binding covalently to the catalytic serine residue at th
    8·1 answer
  • What are the three common fossil fuels?
    15·1 answer
  • How many mL of a 4.50 (m/v)% solution would contain 23.0 g of solute?
    12·2 answers
  • Given the formula for a compound:
    12·1 answer
  • What is the osmolarity of .00001 grams (0.1 mg%) of ethanol (does not dissociate) in one liter?
    15·1 answer
  • Write the answer in scientific notation when you multiply 2 x 104 by 3 x 104.
    7·1 answer
  • Find the number of cations present in 7g of sodium prosphate Na=23 g/mol O=16g/mol P=31g/mol​
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!