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
Xelga [282]
2 years ago
14

Which is the correct Lewis dot structure for BeH2 ?

Chemistry
1 answer:
kherson [118]2 years ago
7 0
H• •Be• •H --> H:Be:H
Since there are 4 valence electrons in total, Beryllium has 2 and Hydrogen has 2. You would put the Be in the middle because there is only 1 of them.
You might be interested in
1. A smoothie contains 1 banana (B), 4 strawberries (St), 1 container of yogurt (Y), and 3 ice cubes (Ic). Write a balanced equa
kvv77 [185]

Answer:

1B +4St+1Y+3lc——-> BSt4Ylc3

Explanation:

I only know the answer for the first question.

4 0
2 years ago
How many grams are in 3.14 moles of PI₃?
OverLord2011 [107]

Answer:

\boxed {\boxed {\sf 1290 \ g \ PI_3}}

Explanation:

We want to convert from moles to grams, so we must use the molar mass.

<h3>1. Molar Mass</h3>

The molar mass is the mass of 1 mole of a substance. It is the same as the atomic masses on the Periodic Table, but the units are grams per mole (g/mol) instead of atomic mass units (amu).

We are given the compound PI₃ or phosphorus triiodide. Look up the molar masses of the individual elements.

  • Phosphorus (P): 30.973762 g/mol
  • Iodine (I): 126.9045 g/mol

Note that there is a subscript of 3 after the I in the formula. This means there are 3 moles of iodine in 1 mole of the compound PI₃. We should multiply iodine's molar mass by 3, then add phosphorus's molar mass.

  • I₃: 126.9045 * 3=380.7135 g/mol
  • PI₃: 30.973762 + 380.7135 = 411.687262 g/mol

<h3>2. Convert Moles to Grams</h3>

Use the molar mass as a ratio.

\frac {411.687262 \ g \ PI_3}{ 1 \  mol \ PI_3}

We want to convert 3.14 moles to grams, so we multiply by that value.

3.14 \ mol \ PI_3 *\frac {411.687262 \ g \ PI_3}{ 1 \  mol \ PI_3}

The units of moles of PI₃ cancel.

3.14 *\frac {411.687262 \ g \ PI_3}{ 1 }

1292.698 \ g\ PI_3

<h3>3. Round</h3>

The original measurement of moles has 3 significant figures, so our answer must have the same. For the number we calculated, that is the tens place.

  • 1292.698

The 2 in the ones place tells us to leave the 9.

1290 \ g \ PI_3

3.14 moles of phosphorous triiodide is approximately equal to <u>1290 grams of phosphorus triodide.</u>

4 0
2 years ago
Aerobic cellular respiration requires an adequate supply of​
Varvara68 [4.7K]

Answer:

oxygen ?

Explanation:

not sure but I think so

3 0
3 years ago
A solution contains 11% by mass of sodium chloride. this means that __________.
d1i1m1o1n [39]

As a solution is contained with 11% by mass of sodium chloride, this will therefore conclude that the 100g of the solution is composed of the 11g of the sodium chloride. In which, the correct answer would be specified as letter c.

5 0
3 years ago
A student measures the mass of a 10m^3 block of gold to be 500 kg what is the density of the gold
Anuta_ua [19.1K]

Answer:

d = 50 kg/m³

Explanation:

density = \frac{mass}{volume}

mass = 500 kg

volume = 10m³

\frac{500}{10} = 50

d = 50 kg/m³

8 0
3 years ago
Other questions:
  • A blue colored ice cube floating on hot water quickly melts to release its color. The cool, blue water moves downward. This down
    10·1 answer
  • An FM radio station has a wavelength of 2.813 m . Convert this length to feet.
    5·2 answers
  • Which of the following is one way creativity can help scientists?
    5·2 answers
  • Which formula represents a convalent compound<br><br><br>. H2O2<br><br>.CaO<br><br>.MgS<br><br>.NaCl
    14·2 answers
  • 7. Phosphorus 32 ( 32), a radioactive isotope of phosphorus, has a half-life of 14.2 days. a. If the amount of radioactivity of
    8·1 answer
  • A mining crew extracted two different types of minerals from underground.
    8·2 answers
  • 20.What do carbon and silicon have in common?
    9·1 answer
  • What is the electron configuration for the Magnesium ion?​
    5·1 answer
  • How many molecules are present in this formula? 3H2 (SO)4
    14·1 answer
  • An inhibitor is added to an enzyme-catalyzed reaction at a concentration of 26.7 μM. The Vmax remains constant at 50.0 μM/s, but
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!