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
Andre45 [30]
3 years ago
14

Isra is analyzing the properties of several samples of elements to find out which sample is a metalloid. Which set of properties

most likely belongs only to a metalloid?
Chemistry
2 answers:
cricket20 [7]3 years ago
8 0

has a high luster and is very brittle

Tatiana [17]3 years ago
4 0

Answer:

Low luster, can conduct electricity

You might be interested in
On a day wilderness expedition you'll need to heat of water to the boiling point each day. The air temperature will average . Yo
AlladinOne [14]

Answer:

36

Your question is not complere. but maybe it is like:

5 day expedition.

you'll need to heat 4.0kg

Air Temperature: 25 °C

each canister has 75 g

The standar heat of formation of propane at 25°C is −103.85 / kJmol...

If the data is not exactly the same, you can follow the same steps.

Explanation:

Given:

Weight of water = 4.0 kg = 4000 g

Boiling point  = 100 °C (T2)

Initial T ° Water= 25 °C (T1)

Specific heat capacity water (Cs) = 4.184 J / g°C

Then  

Energy (q) = m x Cs x (T2-T1)

q = 4000 g x  4.184 J / g°C x (100-25) °C

q = 1255200 J per day

For 5 days the amount of energy will be 5xq = 6276000 J = 6276 kJ

Then we know that the standard heat of formation of propane at 25°C is −103.85kJ/mol. Also, Molecular Weight propane= 44,1 g / mol

 

Then we can know how much propane it's needed:

Mass= 6276 kJ÷103.85 kJ / mol = 60.43 mol

Mass of propane= 60.43 mol ×  44,1 g/mol = 2664.9 g  

So, if each canister has 75.g of propane:  

Number of canister=  2664.9 g ÷ 75.g = 35.53 = 36 canisters

4 0
3 years ago
Read 2 more answers
Use the periodic table to identify the element indicated by each electron configuration by typing in the
EleoNora [17]

Answer:

1s22s22p6: Neon (Ne)

1s22s22p63s23p3: Phosphorous (P)

1s22s22p63s23p64s1: Potassium (K)

1s22s22p63s23p64s2(im not sure what 308 is supposed to be): Calcium (Ca)

1s22s22p63s23p64s23d104p65s24d3: there is no pure element that ends 4d3 that I know of so this can either be Zirconium(Zr) if it ends in 4d2 or Niobium (Nb) if it ends in 4d4

Explanation:

you can look at the periodic table and the trends to find the rough idea of where the electron configuration ends, there are helpful articles and images on these, i attached an image that may help. After that you can look at the atomic number to find the number of electrons for a pure element and use the electron subshell pattern thing to find the exact number

5 0
2 years ago
Neutrons have neither charge nor mass.<br> TRUE<br> FALSE
iren2701 [21]

Answer:

FALSE

nuetrons do indeed have no charge, however they are nearly 2000 more times massive than electrons.

7 0
3 years ago
Which type of wave to support the idea that light is also made of waves
Alex

Answer:

my d comes in waves

Explanation:

7 0
3 years ago
How many ounces are in 0.442 L? Use dimensional analysis to
vovangra [49]

Answer:

14.945798 in us fluid ounce

Explanation:

3 0
3 years ago
Other questions:
  • How would you seperate a mixture of marbles corks and nails?
    6·2 answers
  • Why is it important to neutralize the reaction mixture during the workup?
    6·1 answer
  • A toothpaste company developed a new product. On the package, they printed the claim,
    6·2 answers
  • Two 20.0-g ice cubes at –11.0 °C are placed into 205 g of water at 25.0 °C. Assuming no energy is transferred to or from the sur
    6·2 answers
  • The final solution had a volume of 1.0L and a molarity of 0.925. How many moles of Nickel (II) chloride were present in the solu
    12·1 answer
  • When an aqueous solution at room temperature is analyzed, the [H+] is found to be 2.0 × 10−3 M. What is the [OH−]?
    5·2 answers
  • Explain the energy changes that occur when the following reaction happens:
    8·1 answer
  • CH4 + 2 O2 → CO2 + 2 H2O
    12·1 answer
  • How to light a candle without touching it?​
    12·2 answers
  • The sum of the atomic masses for any compound is the compound’s:
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!