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
Setler79 [48]
2 years ago
12

1.) Over the hour before the precipitation started falling where it did?

Chemistry
2 answers:
Marat540 [252]2 years ago
8 0

Answer:

unknown question :/

Explanation:

dusya [7]2 years ago
3 0

Answer:

Those are the answers to an unknown question???

Explanation:

You might be interested in
ANSWER CORRECTLY PLEASE !!!!!!!!!!!! WILL MARK BRAINLIEST !!!!!!!!!!!!!!!!!!!!!!!
Ann [662]

Answer:

Exothermic.

Explanation:

Exothermic is when he leaves the system. A way to remember is the "ex" which is a prefix/root/suffix or something that pretty much means leaving, I think. For example how it's in "Exodus" and "Exit", I think.

Endothermic is when it goes into the system. Similar to "ex" but with inside, I think. For example how it's in "Endoskeleton", I suppose.

6 0
2 years ago
JJ thomson experiment the atomic theory?
olga nikolaevna [1]
Cathode Ray experiment to figure out electrons exist -> atoms can be broken up into subatomic particles
3 0
2 years ago
Fritz Haber, a German chemist, discovered a way to synthesize ammonia gas (NH3) by combining hydrogen and nitrogen gases accordi
Westkost [7]
1) Write the balanced equation to state the molar ratios:

<span>3H2(g) + N2(g) → 2NH3(g)

=> molar ratios = 3 mol H2 : 1 mol N2 : 2 mol NH3

What volume of nitrogen is needed to produce 250.0 L of ammonia gas at STP?

First, convert the 250.0 L of NH3 to number of moles at STP .

Use the fact that 1 mole of gas at STP occupies 22.4 L

=> 250.0 L * 1mol/22.4 L = 11.16 L

Second, use the molar ratio to find the number of moles of N2 that produces 11.16 L of NH3

=> 11.16 L NH3 * [1 mol N2 / 2 mol NH3] = 5.58 mol N2

Third, convert 5.58 mol N2 into liters at STP

=> 5.58 mol N2 * [22.4 L/mol] = 124.99 liters

Answer: 124,99 liters

What volume of hydrogen is needed to produce 2.50 mol NH3 at STP?
 

First, find the number of moles of H2 that produce 2.50 mol by using the molar ratios:

2.50 mol NH3 * [3mol H2 / 2 mol NH3] = 3.75 mol H2

Second, convert the number of moles to liters of gas at STP:

3.75 mol * 22.4 L/mol =  84 liters of H2

Answer: 84 liters

 </span>



6 0
3 years ago
Read 2 more answers
What is the Molar mass of PbCO4
NNADVOKAT [17]

Answer:

207.2 g/mol

Explanation:

Hopes help

8 0
3 years ago
How many grams of sodium chloride are present in a 0.75 M solution with a volume of 500.0 milliliters?
saveliy_v [14]
The molarity of a solution is a type of expression of concentration equal to the number of moles solute per liter solution. In this problem, we are given the molarity equal to 0.75 M and a volume equal to 500 milliliters. <span>500 milliliters is equal to 0.5 liters. we multiply M and L to get the number of moles then multiply by the molar mass of NaCl. The answer is 21.92 grams.</span>
6 0
3 years ago
Other questions:
  • A compound is known to be Na2CO3, Na2SO4, NaOH, NaCl, NaC2H3O2, or NaNO3. When a barium nitrate solution is added to a solution
    13·1 answer
  • What is the difference between an onion cell and the cheek cell
    11·2 answers
  • 19 pts - How do you determine if something is isoelectronic?
    12·1 answer
  • Think about what you have learned about electrons, energy levels, and electron configurations. In 2 or 3 sentences, explain why
    9·1 answer
  • 1. Which type of intermolecular attractive force operates between all molecules?
    12·2 answers
  • A 5.00 gram sample of an oxide of lead PbxOy contains 4.33 g of lead. Determine simplest formula for the compund
    6·1 answer
  • A student measured a strip of aluminum as 1.25m long. The teacher said it was actually 2.12m long. What was the student's percen
    7·1 answer
  • As a team, determine the rules for naming binary ionic compounds that have a "special" transition metal in it when given the for
    12·1 answer
  • A cyclist accelerates from 0m/s to 8 m/s in 3 seconds . what is his acceleration ?
    6·1 answer
  • Two physical properties of oxygen gas​
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!