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3 years ago

How is the periodic table of the elements arranged?

Chemistry

2 answers:

Bogdan [553]3 years ago

6 0

Answer:

Answer is B

Explanation:

i just took the test

vagabundo [1.1K]3 years ago

3 0

Answer:

B. By aligning groups with common properties.

Explanation:

The periodic table is a table of elements arranged into rows called periods and columns called groups.
Elements with similar chemical properties are placed in the same group. For example, group 1 elements known as alkali metals share similar properties.
Elements in the same period or low have the same number of energy shells or energy levels. For example elements in period 3 have 3 energy levels.

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The state of matter that keeps its shape and volume when it is placed in a different container

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2. How many grams of water can be warmed from 25.0°C to 37.0°C by the addition of 8,064 calories?

sertanlavr [38]

Answer:

672 g

Explanation:

We can calculate the mass of water that can be warmed from 25.0°C to 37.0°C by the addition of 8,064 calories using the following expression.

$Q = c \times m \times \Delta T$

where,

c: specific heat of the water

m: mass

ΔT: change in the temperature

$m = \frac{Q}{c \times \Delta T } = \frac{8,064cal}{(1cal/g. \° C) \times (37.0 \° C - 25.0 \° C) } = 672 g$

The mass of water that can be warmed under these conditions is 672 grams.

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3 years ago

The chemical equation given below represents the chemical reaction between lithium (Li) and sulfur (S). In the equation, why is

algol [13]

Answer:

A. to show the number of lithium atoms involved in the reaction

Explanation:

The reaction between lithium and sulfur produces lithium sulfide where two lithium and one sulfur atoms react.

Balanced equation: 2 Li + S = Li2S

The 2 present before Li on the reactant's side shows how many lithium atoms are supposed to be present per every 1 sulfur atom for this reaction to be balanced and true.

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4 years ago

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What is Δn for the following equation in relating Kc to Kp?CH4(g) + H2O(g) ↔ CO(g) + 3 H2(g)-120-3-2

Sindrei [870]

Answer: Δn for the following equation in relating Kc to Kp is 2.

Explanation:

The balanced chemical equation is:

$CH_4(g)+H_2O(g)\rightleftharpoons CO(g)+3H_2(g)$