If i can get an answer to these two question ill mark you brainliest with 100 points

Can water stay liquid below zero degrees Celsius?

Can you light diamond on fire?

Answer:

Objects with tightly packed molecules are more dense than those where the molecules are spread out

Explanation:

Answer:

it will float when

Explanation:

there is oxygen present of when the object is not dense

Answer:

Components present of sodium bicarbonate

Sodium bicarbonate is formed by mixing carbon, sodium, hydrogen and oxygen molecules. This mixture, also known as baking soda, is actually a type of salt.

Explanation:

Answer:

Explanation:

molar mass Cr(NO3)3 = 238 g/mol

Convert 325 ml to liters:  325 mls x 1 L / 1000 mls = 0.325 L

Convert 10.0 g to moles:  10.0 g x 1 mol / 238 g = 0.0420 moles

Molarity = moles/liters = 0.0420 moles / 0.325 L = 0.129 M (3 sig. figs.)

Answer:

0.25 M

Explanation:

First we convert 85.5 grams of sucrose into moles, using its molar mass:

Then we divide the number of moles by the number of liters to calculate the molarity:

Answer:

it will not be soluble in water Becoz it can only be

separated by passing it through silver nitrate solution

Explanation:

i hope you understand

Answer:

Explanation:

establish a direct relationship between organizational culture and effectiveness

We can see here that the best fuel is the one that produces the most heat per unit mass. In this case, the fuel that produces the most heat per unit mass is methanol.

Fuel is a substance that is used to produce energy through combustion or other chemical reactions. It is commonly utilized to power various forms of transportation, generate heat or electricity, and operate machinery and appliances.

The results of the experiment are shown below:

Fuel            Mass (g)      Heat produced (J)       Heat per gram (J/g)

Methanol 1.0                          350                   350

Ethanol         1.0                          250                   250

Propane         1.0                          200                   200

Butane         1.0                          150                            150

Pentane         1.0                          100                            100

It is important to note that the results of this experiment are only a measure of the heat produced by the fuels.

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The type of aluminum the students should plan to use in order to increase the reaction rate is powder because the greater surface area will allow more collisions between reactants to occur.

The correct option is A.

The nature of the surface area of the reactants will either decrease or increase the rate of reaction.

An increased surface area of the reactants will increase the rate of a reaction because the greater surface area will allow more collisions between reactants to occur.

A decrease in the surface area of the reactants will decrease the rate of a reaction because the greater surface area will not allow more collisions between reactants to occur.

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The answer is 1) Plant roots take in water through their roots.

Explanation:The biosphere is made up of all the lifeforms present on the Earth. The hydrosphere is constituted of all the water bodies and sources of water.

When a certain lifeforms from the biosphere reaches out to another sphere, preferably to fetch what if requires to survive, it is said that there is an interaction between two spheres of the larger environment.

These spheres are all interdependent on each other. (i did this before)

Answer:

Plant roots take in water through their roots.

Explanation:

EDGE 2021

I'm not able to understand that what is written in the pic.. As I can't understand this language..

Treatment that uses drugs to stop the growth of cancer cells, either by killing the cells or by stopping them from dividing. Chemotherapy may be given by mouth, injection, or infusion, or on the skin, depending on the type and stage of the cancer being treated.

Answer:

Synthesis Reaction

Explanation:

Here we see H2 and O2 are being combined H2O. Synthesis reactions are where we see a combination to make a single product.

So here it'd be A + B =AB

2Na(s)+Cl2(g)→2NaCl(s)

Decomposition would be the break down of a compound into 2, the opposite of synthesis.

AB = A + B

2HgO(s)→2Hg(l)+O2(g)

Single replacement is where  1 element replaces another in a reaction, or switches place with 1 element.

AY + B = A + BY

2 HCl(aq) + Zn(s) → ZnCl2(aq) + H2(g)

Double replacement is similar but 2 elements are switch/replaced.

AY + BX = AX + BY

CuCl2(aq) + 2 AgNO3(aq) → Cu(NO3)2(aq) + 2 AgCl(s)

Answer:

B- Active volcano

Explanation:

Answer:

1.43 moles N₂

Explanation:

To determine the moles of nitrogen gas (N₂), you need to multiply the given value by the molar mass. The molar mass is a ratio comparing the mass (g) of nitrogen gas per 1 mole. It is important to arrange this ratio in a way that allows for the cancellation of units (grams should be in the denominator). The final answer should have 3 sig figs to match the given value.

Molar Mass (N₂): 2(14.007 g/mol)

Molar Mass (N₂): 28.014 g/mol

 40.0 grams N₂                1 mole
-------------------------  x  ------------------------  =  1.43 moles N₂
                                    28.014 grams

Answer:

Rubidium

Answer: Rubidium is the most reactive metal. Explanation: Metals are the elements that looses electrons and thus, their chemical reactivity will be the tendency to loose electrons.

Explanation:

Answer:

B

Explanation:

it is the correct composition of water

Answer: A

Explanation:

As one increases the other goes in a straight line.  It is called a direct proportionality.  Forms a linear graph.

Answer:

What is the mass of solute, in grams, in 250.00 mL of a 0.0125 M solution of KMnO4? Moles KMnO4 = M × V = 0.0125 M × 0.250 L = 3.13 × 10-3 mol KMnO4 grams KMnO4 = 3.13 × 10-3 mol KMnO4 × ( 158.03 g KMnO4/1 mol KMnO4) = 0.495 g 4.

The mass of  solute in potassium phosphate will be 6.47 g.

K3 PO4 is the formula for potassium phosphate. Adding the respective molecular masses of each component in the formula unit yields the formula mass.

Calculation of mass of solute is shown as below:

It is given that, M = 0.122 mol/L and V = 250 mL = 0.250 L

It is known the formula of moles.

M = n / V

n = M×V.

Put the value of given data in above equation.

n = 0.250 × 0.122 = 0.0305.

Now, convert moles in to gram.

Moles of potassium phosphate × gram of potassium phosphate/ 1 mol potassium phosphate = gram He.

0.0305 × 212.27 g / 1 = 6.47 g

Therefore, the mass of  solute will be 6.47 g.

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The number of atoms in 30.0 g of K would be 4.632  x \(10^{23}\) atoms.

1 mole of a substance contains 6.022 x \(10^{23}\) atoms.

Mole of 30.0 g of K potassium = 30/39

                                                       = 0.7692 moles

Hence, 0.7692 moles of K would contain

                     0.7692 x 6.022 x  \(10^{23}\) atoms.

                                = 4.632  x \(10^{23}\) atoms.

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The 0.015 moles of gastric acid will be neutralized by a 1.6 gram antacid pill.

By inhibiting the enzyme that produces acid in the stomach to break down food for digestion, antacids neutralize the gastric acid there. An enzyme called pepsin, which breaks down proteins, is inhibited by the antacids, which work by neutralizing the stomach's pH.

0.342 grams of HCL are neutralized every gram of antacid.

Based on the titration's equivalence point expression, this is calculated.

1.6 gram HCL neutralized antacid is,

(0.342 grams HCL to 1 grams antacid) A 1.6 gram antacid

= 0.5472 gram

HCL has a 36.5 gram molar mass.

Moles of HCL = 0.5472 g/36.51 g = 0.01499

As a result, HCL has a mole of 0.015 moles of gastric acid (hci) would it neutralize

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Answer:

Vibration is a form of action, therefore it is kinetic energy.

Answer:

44.28 grams.

Explanation:

Nursing needs assessments involve gathering subjective and factual information, including the patient's psychosocial history, family history, surgery history, medical history, and medication history.

Introduction Hematologic diseases, sometimes known as blood disorders or disorders of the blood-forming organs, affect millions of Americans. Hematologic diseases, in addition to blood cell tumors, also include rare genetic disorders, HIV-related ailments, sickle cell disease, anemia, and side effects from chemotherapy or blood transfusions.

In hematologic disorders, the genetic condition is passed from parents to their offspring.

Hemoglobin can be aberrant in numerous ways.

a condition like sickle cell anemia, thalassemia.

Certain blood disorders are brought on by a decrease in red blood cell formation.

• Nursing needs assessments involve gathering subjective and factual information, including the patient's psychosocial history, family history, surgery history, medical history, and medication history.

• The patient's family should also be checked for similar disease patients, and accurate disease-related data must be gathered.

• From time to time, thoroughly review all of the patient's reports. Which the patient reported early.

Using clinical judgment, do an analysis or diagnosis to determine the patient's condition and identify the primary causes.

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The density of air at exactly 35°C and 1.00 atm (assuming that air is 80.0 percent N2 and 20.0 percent O2 is 1.1 g/L.

Density is described as the substance's mass per unit of volume.

Density of a gas d is given as  = PM/ RT

where d ⟶ Density of the gas

P ⟶ Pressure of the gas

M⟶ Molar Mass of the gas

R⟶ Universal Gas Constant

T⟶ Absolute temperature

we have that the pressure of air is P=1.00 atm, and the temperature is T=35∘C=308K.  The molar mass of air can be assumed to be the weighted average of its components.

The air is 80% nitrogen and 20% oxygen, so 1 mole of air will contain 0.80 moles of nitrogen and 0.20 moles of oxygen. So, the molar mass of air will be:

Molar Mass of air= 0.80 MN2 + 0.20MO2 = 0.80 (28.00g/mol) + 0.20 (32.00g/mol) = 28.8 g/mol

Substituting the values into the equation of d = PM/ RT, we have

density = 1.1g/L

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Answer: city w

Explanation:

cities w,y,z all use renewable energy (sun, water, wind) which offput any greenhouse emmissions,

city w uses coal which produces greenhouse gases when used (burnt).

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The color of light which is associated with the highest energy is violet and is the appropriate color of the flame which is present in a stove during complete combustion.

This is defined as the profess in which substances react with oxygen resulting in the release of heat. The color of light with the highest energy ranges from blue to violet and has a higher temperature at this point.

In a stove, we can observe an icy blue color which signifies that it has the possible energy due to the complete combustion being experienced which is why gas is referred to as a clean material.

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Answer:

none of the liquid is purple

Answer:

Explanation:

The number of molecules can be found by using the formula

N = n × L

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

N = 4.99 × 6.02 × 10²³

We have the final answer as

Hope this helps you

Answer:

C

Explanation:

The reflection if sunlight on the water makes the water look silver,gray,white

The molecule described below is known as :

2-pentene.

In the diagram below:

As a result, the compound is 2 pentene.

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Answer &

Explanation:

eukaryotic: Having complex cells in which the genetic material is contained within membrane-bound nuclei. cell: The basic unit of a living organism, consisting of a quantity of protoplasm surrounded by a cell membrane, which is able to synthesize proteins and replicate itself.

therefore it is cell