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Schach [20]
3 years ago
9

Nemistry I sem

Chemistry
1 answer:
GaryK [48]3 years ago
3 0

Answer:

A

Explanation:

BF3 has a trigonal planar shape.

XeO3 has a trigonal pyramidal shape.

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HELLPPP PLZZ ASAPP!
Sphinxa [80]

Answer:

Condensation and Depositon

Explanation:

Condensation is from gas to liquid

Deposition is from gas to solid

7 0
3 years ago
What is the minimum frequency of light required to observe the photoelectric effect on pd
Tems11 [23]

Answer:

1.26 × 10¹⁵ s⁻¹

Explanation:

Work function is the minimum energy required to remove an electron from the surface of metal

energy of the electron = hf - Φ

Φ = work function = hf₀ where f₀  = threshold frequency

f₀ = Φ / h  where h ( Planck constant = 6.626 × 10⁻³⁴ Js)

Φ = 5.22eV = 5.22 × 1 eV  where 1 eV = 1.60217662 × 10⁻¹⁹ J

Φ = 5.22 × 1.60217662 × 10⁻19 J = 8.363362 × 10⁻¹⁹ J

f₀ =  (8.363362 ×10⁻¹⁹  J) / (6.626× 10⁻³⁴ Js) = 1.26 × 10¹⁵ s⁻¹

The frequency must be greater than the 1.26 × 10¹⁵ s⁻¹ to observe the emission

3 0
4 years ago
A chemist determined by measurements that 0.050 moles of tin participated in a chemical reaction. Calculate the mass of tin that
stepladder [879]

Answer:

Explanation:

MM of I2 = 2 (127 g) = 254 g/mol

0.065 mol I2 x 254g I₂/ 1 mol I₂  = 16.5 g I2

8 0
3 years ago
Read 2 more answers
Ba(NO3)2 + 2LiOH → Ba(OH)2 + 2LiNO3
STALIN [3.7K]

Answer:

C.

two in the reactants and two in the products

Explanation:

The law of conservation of mass helps us balance chemical equations so that there are the same number and type of atoms in the reactants and products.

There are two nitrate ions in Ba(NO3)2 and two in 2LiNO3.

3 0
3 years ago
Read 2 more answers
The smallest particle of an element that retains the properties of that element is a(n)
alekssr [168]

Answer: atom

Explanation:

It makes the most sense to me anyways seeing that an atom contains protons electrons and neutrons in it already

4 0
3 years ago
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