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3 years ago

Which step in the scientific method requires you to use your senses to obtain information?

Chemistry

1 answer:

a_sh-v [17]3 years ago

7 0

Answer:

The answer is Observation.

For you to observe the things around you then you need to use all your sense organs....

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If a Cod Fish Parent has 82 Chromosomes in its Body Cells, how many

MakcuM [25]

Answer:

41 chromosomes each

Explanation:

Meiosis is the means by which sexually-reproducing organisms produce gametes /sex cells used during reproduction. Meiosis is a kind of cell division that results in daughter cells (gametes) with a reduced number of chromosomes (by half). This means that meiosis reduces the chromosomal number of parents cell in the gametes.

Based on this, if a cod fish that possesses 82 chromosomes in Its somatic or body cells undergo meiotic division in order to produce gametes. The chromosome number of the sex cells will be reduced by half i.e. from 82 chromosomes (diploid, 2n) to 41 chromosomes (haploid, n)

7 0

3 years ago

CO(g) + 12 O2(g) → CO2(g)The combustion of carbon monoxide is represented by the equation above.(a) Determine the value of the s

devlian [24]

Answer : The standard enthalpy change for the combustion of CO(g) is, -283 kJ/mol

Explanation :

According to Hess’s law of constant heat summation, the heat absorbed or evolved in a given chemical equation is the same whether the process occurs in one step or several steps.

According to this law, the chemical equation can be treated as ordinary algebraic expression and can be added or subtracted to yield the required equation. That means the enthalpy change of the overall reaction is the sum of the enthalpy changes of the intermediate reactions.

The combustion of $CO$ will be,

$CO(g)+\frac{1}{2}O_2(g)\rightarrow CO_2(g)$ $\Delta H_{rxn}=?$

The intermediate balanced chemical reaction will be,

(1) $C(s)+\frac{1}{2}O_2(g)\rightarrow CO(g)$ $\Delta H_1=-110.5kJ/mol$

(2) $C(s)+O_2(g)\rightarrow CO_2(g)$ $\Delta H_2=-393.5kJ/mol$

Now we are reversing reaction 1 and then adding both the equations, we get :

(1) $CO(g)\rightarrow C(s)+\frac{1}{2}O_2(g)$ $\Delta H_1=110.5kJ/mol$

(2) $C(s)+O_2(g)\rightarrow CO_2(g)$ $\Delta H_2=-393.5kJ/mol$

The expression for enthalpy change for the reaction will be,

$\Delta H_{rxn}=\Delta H_1+\Delta H_2$

$\Delta H_{rxn}=(110.5)+(-393.5)$

$\Delta H_{rxn}=-283kJ/mol$

Therefore, the standard enthalpy change for the combustion of CO(g) is, -283 kJ/mol

6 0

3 years ago

g When a species can be represented by two or more resonance structures, the actual representation of bonding in the species is

AlekseyPX

Answer:

B. the resonance hybrid of all structures

Explanation:

The idea of resonance is used to explain bonding in compounds where a single structure does not fully account for all the bonding interactions in a molecule.

A number of equivalent structures are then used to show the nature of bonding in such a molecule. Such structures are called resonance structures or canonical structures. None of these structures individually offer a holistic explanation to the bonding interactions in the molecule under study.

However, a hybrid of all the canonical structures does explain the nature of bonding in the molecule.

6 0

3 years ago

Read 2 more answers

Its Accelerated Science 8th grade

skelet666 [1.2K]

In my opinion I believe it would be motion because depending on how fast the person is going it would determine the outcome of the race

8 0

2 years ago

What is the atomic mass equal to?

mixer [17]

Atomic mass is equal to the total number of electrons neutrons and protons