CHEMISTRY HIGH SCHOOL

The bonds in BaO are best described as(1) covalent, because valence electrons are shared
(2) covalent, because valence electrons are transferred
(3) ionic, because valence electrons are shared
(4) ionic, because valence electrons are transferred

Answers

Answer 1
Answer: The answer is (4) ionic, because valence electrons are transferred. Ba is a metal and O is a nonmetal, so the bond between them is ionic. Ionic bonds occur when electrons are transferred from the metal to the nonmetal, and the cation-anion pair is held together by electrostatic attraction.

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Which units express heat capacity

Answers

Answer:

Heat capacity units: J/K

Explanation:

Heat capacity (C) is the amount of heat (Q) required to raise the temperature(T) of a substance by a unit degree.

C = (Q)/(T)

It is usually expressed in terms of J/K

Heat capacity is an intensive property i.e. it is not dependent on the amount of the substance. i.e, the amount of heat required to raise the temperature of 1 g of copper per kelvin would be the same as that corresponding to 100 g.
the heat capacity of a defined system is the amount of heat (usually expressed in calories, kilocalories, or joules) needed to raise the system's temperature by one degree (usually expressed in Celsius or Kelvin). It is expressed in units of thermal energy per degree temperature. To aid in the analysis of systems having certain specific dimensions, molar heat capacity and specific heat capacity can be used. To measure the heat capacity of a reaction, a calorimeter must be used. Bomb calorimeters are used for constant volume heat capacities, although a coffee-cup calorimeter is sufficient for a constant pressure heat capacity.

Based on Table G, determine the total mass of NH3 that must be dissolved in 200. grams of water to produce a saturated solution at 20.°C.

Answers

Its 112

Explanation:

Dont need one just trust me

A certain skin lotion is a fine mixture of water and various oils. This lotion is cloudy and cannot be separated into oil and water by filtration or centrifuge. What type of mixture is it?

Answers

A certain skin lotion is a fine mixture of water and various oils. This lotion is cloudy and cannot be separated into oil and water by any filtration or centrifuge, it is a colloid mixture. The colloid consists of large molecules & ultra microscopic particles of a substance that has been dispersed by another substance. 

What was the minimum temperature to the nearest degree for the thermometer shown here? / a. +16ºC b. +4ºC c. -13ºC d. -6ºC

Answers

A figure of the thermometer for this problem is not given so I cannot really give a specific answer. Maybe this would help. The minimum temperature would be the lowest reading possible in the thermometer. Most probably it is option C or D. Hope this helps.

Answer:

A figure of the thermometer for this problem is not given so I cannot really give a specific answer. Maybe this would help. The minimum temperature would be the lowest reading possible in the thermometer. Most probably it is option C or D. Hope this helps.

A chemical with a bitter taste is most likely a(n) _____ a. salt.
b. solvent.
c. acid.
d. base.

Answers

(D)Base has a bitter taste

Which formula represents a compound whose molecules are tetrahedral? (A) BH₃
(B) C₂H₂
(C) CH₄
(D) H₂O
(E) C₂H6₆

Answers

......H
......|
H—C—H
..... |
..... H

methane CH4
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