help me please i don’t understand the problem

Answer:

A. Occur in gaseous and liquid state

Explanation:

The choice that is not a characteristic of minerals is that minerals occur in gaseous and liquid state.

All minerals are solid inorganic compounds.

Answer:

A. how cholesterol works in the body.

Explanation:

If we know the precise structure of a molecule (by X-ray crystallography), we can understand more about how it interacts with cells, proteins, and other molecules. It can also tell us what reactions it might take part in.

Therefore, we can learn more about how it works in the body and what activities it takes part in in the cells of the body.

Answer:

A

Explanation:

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0.04350179862

Explanation:

Make sure to check for sig figs though. Basically, you have 2.54 mL and you multiply that by the 0.789 g/mL and mL cancels out and you are left with 2.00406g. There are 46.06844 grams per mol of ethanol, so to cancel out grams we multiply by 1/46.06844. And then we are left with 0.04350179862 mol

Answer:

  50.  54,915 J

  51.  27.0 g

Explanation:

The dimensional analysis tells you how to compute these. Multiplying specific heat, J/(g·°C), by the product of mass and temperature change will give you energy.

__

50.  (375 g)((70 -45) °C)(4.184 J/(g·°C)) = 54,915 J

__

51. M((50 -25)°C)(4.184 J/(g·°C)) = 2825 J

  M = 2825/104.6 g ≈ 27.0 g

Answer:

a)  Fe₂S₃(s) + 6H⁺(aq) ---> 6HBr(g) + Fe³⁺

b) Net ionic equation: Cu²⁺(aq) + CO₃²⁻(aq) ---> CuCO₃(s)

c) No reaction

d) Net ionic equation: Bi(OH)₃(s) + 3H⁺(aq) ---> Bi³⁺(aq) + 3H₂O

Explanation:

a) This is a double displacement reaction between solid iron(iii) sulphide and hydrobromic acid to produce hydrogen sulphide gas. The full and net equations of the reaction are given below:

Fe₂S₃(s) + 6HBr(aq) ---> 2FeBr₃ + 3H₂S(g)

Net ionic equation:  Fe₂S₃(s) + 6H⁺(aq) ---> 6HBr(g) + Fe³⁺

b) This is a double displacement reaction between potassium carbonate and copper (ii) nitrate to produce insoluble copper (ii) carbonate. The full and net equations of the reaction are given below:

K₂CO₃(aq) + Cu(NO₃)₂(aq) ---> KNO₃(aq) + CuCO₃(s)

Net ionic equation: Cu²⁺(aq) + CO₃²⁻(aq) ---> CuCO₃(s)

c) No reaction as no precipitate is formed

d) This is a neutralization reaction between bismuth (iii) hydroxide and trioxonitrate (v) acid to produce sat and water. The full and net equations of the reaction are given below:

Bi(OH)₃(s) + 3HNO₃(aq) ---> Bi(NO₃)₃(aq) + 3H₂O(l)

Net ionic equation: Bi(OH)₃(s) + 3H⁺(aq) ---> Bi³⁺(aq) + 3H₂O

Answer:

The correct answer is 0.22 mol Te.

Explanation:

First, we have to calculate the mass of Te in the sample. We simply multiply the sample mass by the percentage of Te (28.53%= 28.53/100)

100.00 g x 28.53/100 = 28.53 g Te

The molar mass of Te is 127.60 g. Thus, the mass of 1 mol of Te is 127.60 g. With this, we calculate how many moles of Te there are in 28.53 g of Te:

28.53 g Te x 1 mol Te/127.60 g Te= 0.223 mol ≅ 0.22 mol

Answer:

zygote

Explanation:

In human beings, each gamete contains 23 chromosomes, half the number found in the other cells of the body. When the male and female gametes fuse, they become a zygote containing the full 46 chromosomes, half of which came from the father and half from the mother.

Answer:

zygote

Explanation:

In human beings, each gamete contains 23 chromosomes, half the number found in the other cells of the body. When the male and female gametes fuse, they become a zygote containing the full 46 chromosomes, half of which came from the father and half from the mother.

Answer:

C. 64

Explanation:

Given:

The number of equally likely sample outcomes of a single stage = 4

Unknown:

Total number of elements if there are three stages= ?

Solution;

Probability is the likelihood of an event to occur.

  In this problem;

      For a single stage, the likely outcome is 4

So therefore;

   For the 3 stages 4 x 4 x 4 = 64

Therefore, the total number of elements in the sample space of an experiment with 3 stages is 64

Answer:

2

Explanation:

because it same volume

Answer:

They are organized by atomic number, hence the reason for 1,2,3,4, you get where im goin'?

Explanation:

Explanation:

its light waves cannot travel through vaccum

hope it helps

Answer:

Transverse waves do not require a medium to travel.

Explanation:

Answer:

sulfur

Explanation:

Answer:

So 1st it is B then D then E then a then C

The order of density of substances ranging from most dense to least dense is :substance B>substance A>substance E>substance C>substance D.

It is a ratio of substance's mass per unit of volume.Symbol most commonly used for density is р.The SI unit of density is kilogram per cubic meter .It explains how tightly a material is packed together.

There are 2 types of density :1)absolute density 2) relative density.Absolute density is the mass of any  substance per unit volume and relative density is the ratio of density of a substance to the density of a given reference material.

Reference material used for relative density is water.The instrument used for measuring density or relative density of liquids is hydrometer. Density is measured at constant temperature and pressure.

To learn more about density and it's types click here:

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Answer:

nitrogen 18

nitrogen has an atomic number of 7

Answer: The correct answer is B.

Explanation: The scientists and all test subjects involved in the investigation work for the company that sells the medication and  science product or similar is only considered as reliable if it has been tested following the scientific method and if there are not interests that can affect the process.

Answer:

ACB

Explanation:

Thermal energy is the average sum of all kinetic energy of all the molecules of gases. The correct order of mug in decreasing thermal energy is C>A>B.

Thermal energy is a energy which is possess by a moving object. It is directly proportional to kinetic energy of the molecules. It is very difficult to find the correct value of kinetic energy so we find average kinetic energy. Which is very easy to calculate as compared to calculating kinetic energy. Average kinetic energy is directly proportional to temperature. It is not dependent on the type of gases or mass of gases.

Mathematically,

K.E=2/3KT

Where,

K= Boltzmann constant

T is the temperature

Between A and C whose volume is same, 120°F is the highest temperature so, C will have high thermal energy than A. C will have lowest thermal energy as it has volume larger than that of A and C.

Therefore, the correct order of mug in decreasing thermal energy is C>A>B.

Learn more about the thermal energy, here:

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Answer:

Mass of proton neutron and electron

Protons, neutrons, and electrons: Both protons and neutrons have a mass of 1 amu and are found in the nucleus. However, protons have a charge of +1, and neutrons are uncharged. Electrons have a mass of approximately 0 amu, orbit the nucleus, and have a charge of -1.

Explanation:

Hope this helps :)

Answer:

2.920

Explanation:

This question tests your knowledge of approximation. If we look at the place values after the decimal point, we have, .915. This corresponds to hundredth, tenth and unit.

Since we have 9.15, in rounding it to the nearest tenth, we have to round it up to .920.

Hence, the weight of the flour to the nearest tenth is 2.920.

Answer:

biology

Explanation:

biology is the study of living g things

Answer:

The answer you would be looking for is Biology

Answer:

25°C + 273.15 = 298.15K , so D.) is the Answer

Explanation:

Answer: the electric charge is the atomic number

Answer:

where are the options?

Explanation:

Answer:

this is the answer for will NaOH be a buffer

Explanation:

The compound CH 3NH 3Cl is a salt made from that weak base, so the combination of these two solutes would make a buffer solution. NH 3 is a weak base, but NaOH is a strong base. The combination of these two solutes would not make a buffer solution

Answer:

Speed: The rate at which someone or something is able to move or operate. Motion: The action or process of moving or being moved.

Explanation:

I pretty much explained it in the answer, have a good one!

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Answer:

yaaaaa babdbabaaaa lolll

Explanation:

I'll be honest I'm guessing,

but maybe D

Answer:it do not states

Explanation:

Answer:

Holmium

Explanation:

Electronic configuration:

             [Xe] 6s² 4f⁵ 5d⁶

To know this element, we must first find the atomic number and then look for its position on the periodic table.

     Number of electrons in [Xe] = 54;

  So the total number of electrons  = 54 + 2 + 5 + 6 = 67

This element has an atomic number of 57. On the periodic table, it is Holmium

Answer:

Electron domains in the valence shell of an atom will arrange themselves so as to minimize repulsions

Explanation:

In accordance with VSEPR theory, the electron domains or electron pairs on the valence shell of the central atom in a molecule always position themselves as far apart in space as possible in order to minimize repulsions.

Recall that according to VSEPR theory, the shape of a molecule depends on the number of electron pairs or electron domains on the valence shell of the central atom of the molecule, both lone pairs and bond pairs. Lone pairs are known to cause more repulsions than bond pairs.