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3 years ago

True/False: When a substance is heated, the change in energy causes the bonds between particles to become stronger.

Chemistry

2 answers:

Kazeer [188]3 years ago

7 0

Answer:

False

Explanation:

When a substance is headed the energy causes the bonds between the particles to loosen and move around faster as the chemical/kinetic ebergy grows stronger

Rzqust [24]3 years ago

5 0

Answer:

false

Explanation:

the energy causes the bonds to become looser

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What is the average atomic mass of the following isotopic mixture - 42.10 g/mole- 93.50%; 48.30 g/mole 6.200%; 50.40 g/mole - 0.

bazaltina [42]

Answer:

40.03g/mole

Explanation:

Given parameters:

Mass = 42.10 g/mole and abundance = 93.50%

Mass = 8.30 g/mole and abundance = 6.200%

Mass = 50.40 g/mole and abundace = 0.3000%

Find;

Average atomic mass = ?

Solution:

Average atomic mass = sum (mass x abundance)

Average atomic mass = ( $\frac{93.50}{100} x 42.1$ ) + ( $\frac{6.2}{100}$ x 8.3) + ( $\frac{0.3}{100} x 50.4$ )

= 39.36g/mole + 0.52g/mole + 0.15g/mole

= 40.03g/mole

8 0

3 years ago

Decide which element probably forms a compound with oxygen that has a chemical formula most and least similar to the chemical fo

mafiozo [28]

Answer:

Most similar ----- Lithium

Least similar ---- Nitrogen

Explanation:

Cesium is an element on the periodic with the atomic number 133. It lies in group 1 (i.e., the alkali metals) and period 6 on the periodic table. The oxidation state of group 1 metals is +1. Cesium forms an oxide with oxygen as $Cs_2O$ .

The most similar compound to this chemical compound is Lithium because Lithium happens to be in the same group one metal with Cesium and forms the compound $Li_2O$ with the oxygen

The least similar compound nitrogen due to fact that it is an oxide that is covalent in nature and lies between-group 3 -17 to form an $NO_2$ with oxygen.

8 0

2 years ago

What mass of copper is required to replace silver from 4.00g of silver nitrate dissolved in water?

larisa [96]

The balanced chemical reaction is written as:

<span>Cu +2AgNO3 → Cu(NO3)2 + 2Ag
</span>
We are given the amount of silver nitrate to be used for the reaction. This value will be the starting point of our calculations. It is as follows:

4.00 g AgNO3 ( 1 mol / 169.87 g ) ( 1 mol Cu / 2 mol AgNO3 ) ( 63.456 g / 1 mol ) = 0.747 g Cu

3 0

3 years ago

A 603.0 g/hr stream of liquid methyl alcohol, also called methanol, (CH3OH) at 8.10 atm and 26.0°C was held at constant pressure

mafiozo [28]

Answer:

$Q=\frac{1385270 J}{hr}$