If'substance X is a liquid, substance Y is a gas, and substance Z is a solid, and all are at thesame temperature and pressure, then the order of increasing strength of their intermolecular
forces would be

Answers

Answer 1

Answer:

The answer is Y < X < Z

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How many atoms of oxygen in this equation : 3Ni(OH)2
Atoms are:O A. One of the 4 elements that matter is composed of.B. Connected by bonds to form compounds.OC. The basic building blocks of matter.O D. Heterogeneous and refer to color, texture, and appearance.Reset Selection
Given the balanced equation representing a reaction occurring in an electrolytic cell:
Given the reaction below, which is the reduced substance?Mg + Cl2 mc006-1.jpg Mg2+ + 2Clmc006-2.jpg

Answers

Scientists have: (Select all that apply.)
a. observed amino acids forming spontaneously
b. demonstrated how amino acids can form from the environment
c. confirmed that the ultimate source of amino acids and proteins is from plants
d. not yet determined the source of amino acids

The correct answers are:

Demonstrated how amino acids can form from the environment
Confirmed that the ultimate source of amino acids and proteins is from plants

Demonstrated how amino acids can form from the environment and confirmed that the ultimate source of amino acids and proteins is from plants. Hope that was helpful!

Consider the following for the reaction at 300 K:3 ClO– (aq)  ClO3– (aq) + 2 Cl– (aq)ExperimentInitial [ClO–] (M)Initial Rate of Formation of ClO3– (aq)(M/min)10.4521.048 × 10–420.9034.183 × 10–4(7) (4 pts) What is the order of the reaction with respect to ClO– (aq)?A) 0B) 1C) 2(8) (4 pts) For experiment #2, what is the initial rate of consumption of ClO–

Answers

Answer:

Second order

Δ[ClO⁻]/Δt = - 4.183 x 10⁻⁴ M/min

Explanation:

Given the data:

Experiment # [ClO–] (M) Initial Rate of Formation of ClO3– (M/min)

1 10.452 1.048 x 10⁻⁴

2 20.903 4.183 x 10⁻⁴

we need to determine the order of the reaction with respect to ClO⁻.

We know the rate law for this reaction will have the form:

Rate = k [ClO⁻]^n

where n is the order of the reaction. Thus, what we need to do is to study the dependence of the initial rate on n for the experiment.

If the reaction were zeroth order the rate would not change, so we can eliminate n= 0

If the reaction were first order, doubling the concentration of [ClO–] , as it was done exactly in experiment # 2, the initial rate should have doubled, which is not the case.

If the reaction were second order n: 2, doubling the concentration of [ClO–] , should quadruple the initial rate of formation of ClO3–, which is what it is observed experimentally. Therefore the reaction is second order respect to ClO–.

The initial rate of consumption of ClO⁻ is the same as the rate of formation of ClO₃⁻ since:

Δ = - Δ[ClO⁻]/Δt = + Δ[ClO₃⁻]/Δt = + 1/2 [Cl⁻] /Δt

where t is the time.

from the coefficients of the balanced chemical equation.

- Δ[ClO⁻]/Δt = + Δ[ClO₃⁻]/Δt = + 1/2 [Cl⁻ ] = rate

Δ[ClO⁻]/Δt = - 4.183 x 10⁻⁴ M/min

How many atoms are there in 90.2 grams of selenium?

Answers

First calculate the moles of selenium by multiplying the mass x molar mass
90.2 × 78.96 = 7122.2 moles

Number of moles multiplied by avogadros number gives number of atoms
7122.2 × 6.022 × 10^{23} = 4.289×10^{27} atoms

What is the molecular formula of caffeine, given that it has an empirical formula of C_4H_5N_2O and a molar mass of 194 g/mol?

Answers

Answer:

$Empirical formula : C4 H 5 N2O \n Empirical \: molar \: mass \: of \: the \n compound \: obtain : \n 12×4+5+2×14+16=97 \n \n Given \: the \: molar \: mass \: of \n Caffeine = 194.2 \n \n n= 194.2 /97=2 \n Thus \: Formula \: of \: \n Caffeine = (C 4H5 N 2 O)2$

Justify water is compound

Answers

Water is a compound. A compound is made up of two or more elements. In the case of water, or H2O, there are 2 hydrogen atoms present and 1 oxygen atom. I hope this helps you on your assignment. Good luck!

7 characteristics that can be used to describe minerals

Answers

Hardness, cleavage, fracture, color, streak, luster, and tenacity.
Hope this helps :)

Final answer:

Minerals can be described using 7 key characteristics: color, streak, luster, crystal form, hardness, cleavage, and density. These characteristics provide detailed information about a mineral's geological properties.

Explanation:

The characteristics used to describe minerals are generally located in the detail of their geological properties. These characteristics include:

Color: The appearance of the mineral in natural light.
Streak: The color of the mineral in powdered form.
Luster: The way a mineral reflects light, either metallic or non-metallic.
Crystal Form: The external shape of the mineral crystal.
Hardness: A measure of the mineral's resistance to being scratched.
Cleavage: The manner in which the mineral breaks along regular planes.
Density: The mass per unit volume of the mineral, measured by specific gravity.