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
Svetradugi [14.3K]
3 years ago
9

How a strontium salt emits colored light​

Chemistry
1 answer:
Bond [772]3 years ago
3 0

Answer:

When excited electrons fall to lower energy levels, they can release energy in the form of light. metal ions in the salts used in the flame tests.

You might be interested in
4Fe + 3O2  2Fe2O3
LenKa [72]
Oxidation
iron+oxygen happened
6 0
3 years ago
Number of sodium atom(s) in salt (NaCl)
asambeis [7]

Answer:

NaCl consists of one atom each of sodium and chlorine. Hence, each molecule of NaCl has 2 atoms total.

Explanation:

6 0
3 years ago
Read 2 more answers
In the synthesis reaction, the white powder produced is magnesium oxide (mgo, mm = 40.3 g/mol). how many moles of magnesium oxid
gulaghasi [49]
Number of moles = mass of product / molecular mass
=mass of product (MgO) / 40.3

Since the mass of MgO is not given in the question, the correct answer choice cannot be given.  However, proceeding witht eh above formula will enable you to find the correct number of moles given the mass of MgO.
3 0
3 years ago
Determine the correct Lewis structure for ammonia (NH3). Note: Hydrogen and nitrogen have one and five valence electrons respect
Tresset [83]
The lewis structure is helpful in showing how the bonding between atoms of a molecule are. The lewis structure of ammonia would be that the nitrogen atom will share three pairs of electron with the three hydrogen atoms leaving nitrogen to have 1 lone pair.<span />
7 0
4 years ago
The solubility of N2 in blood can be a serious problem (the "bends") for divers breathing compressed air (78% N2 by volume) at d
OLga [1]

Answer:

The volume is 19.7 mL

Explanation:

<u>Step 1</u>: Given data

Pressure at sea level = 1.00 atm

Pressure at 50 ft = 2.47535 atm

kH for N2 in water at 25°C is 7.0 × 10−4 mol/L·atm

Molarity (M) = kH x P

<u>Step 2</u>: Calculate molarity

M at sea level:

M = 7.0*10^-4 * (1.00atm * 0.78) = 5.46*10^-4 mol/L

M at 50ft:

M = 7.0*10^-4 * (2.47535atm * 0.78) = 13.5*10^-4 mol/L

We should find the volume of N2. To find the volume whe have to find the number of moles first. This we calculate by calculating the difference between M at 50 ft and M at sea level.

13.5*10^-4 mol/L - 5.46*10^-4 mol/L = 8.04*10^-4 mol/L

Step 3: Calculate volume

P*V=nRT

with P = 1.00 atm

with V = TO BE DETERMINED

with n =  8.04*10^-4 mol/L  *1L = 8.04*10^-4

with R= 0.0821 atm * L/ mol *K

with T = 25 °C = 273+25 = 298 Kelvin

To find the volume, we re-organize the formula to: V=nRT/P

V= (8.04*10^-4 mol * 0.0821 (atm*L)/(mol*K)* 298K ) / 1.00atm = 0.0197L = 19.7ml

The volume is 19.7 mL

5 0
3 years ago
Other questions:
  • 2. The Food and Drug Administration (FDA) mandates that all vinegar sold in the United States must have a minimum concentration
    6·1 answer
  • Complete the chart. (Remember to enter a "0" if necessary.) Atomic Number: 10 1s: 2s: 2p: 3s: 3p: 4s: 3d: 4p: 5s:
    7·1 answer
  • A 250ml aqueous solution contains 45.1microgram of pesticide.express the pesticide concentration in:
    8·1 answer
  • How many moles of hexane must burn to form 18.4 mol of carbon dioxide
    8·2 answers
  • What is the common name of H2O
    8·2 answers
  • What is a chemical property of the fruit shown above? A. The fruit can decompose. B. The fruit has a mass of 250 grams. C. The f
    13·2 answers
  • Please help fast please!!!
    12·1 answer
  • Which term is defined as a way of classifying and describing animals?
    8·2 answers
  • Mercury (Hg) is present in trace amounts in coal, ranging from 50.0 to 200.0 ppb. A typical power plant burns 2.39 million tons
    10·1 answer
  • The size of early universe was...
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!