A graduated cylinder contains 35.78 mL of water an object is placed in the cylinder volume of water rises to 41.23 mL what is the volume of the object

Answer:

A Animals,

Explanation:

Complexity deals with the level of organization of life an organism belongs to. There are different levels of organization of life and as you move up, the complexity increases.

Cell → Tissues →  Organs → Systems → Organism

As we go through this levels from the left to the right, the complexity of the organisms found at each levels increases.

   Most animals exists at the organism level and they are made of several systems which enables them to function properly.

Answer:

I believe the answer is A

Explanation:

I hope this helps :)

Explanation:

Igneous rocks are one of the types of rocks that we have. They are usually formed by the cooling and solidification of magma.

We magma cools, they begin to crystallize minerals from within them and these are the minerals that forms the eventual rock when all is set.

Answer:

1.259 mol

Explanation:

Given data:

Pressure of gas = 1.2 atm

Volume of gas = 31 L

Temperature of gas = 87°C

Number of moles = ?

Solution:

The given problem will be solve by using general gas equation,

PV = nRT

P= Pressure

V = volume

n = number of moles

R = general gas constant = 0.0821 atm.L/ mol.K  

T = temperature in kelvin

Now we will convert the temperature.

87+273 = 360 K

by putting values,

1.2 atm × 31 L = n×0.0821 atm.L/ mol.K   × 360 K

37.2 atm.L = n× 29.556 atm.L/ mol

n = 37.2 atm.L / 29.556 atm.L/ mol

n = 1.259 mol

1.259 mol is the number of mol for an unknown quantity of gas at a pressure of 1.2atm, a volume of 31 L, and a temperature of 87°C.

A mole is a unit of measurement used to express the quantity of a chemical in chemistry. It is a key idea in the subject and is important to many computations, including stoichiometry. Any substance has an Avogadro number of particles in one mole, which is roughly 6.022×10²³. Depending on the item under consideration, these particles may be atoms, molecules, ions, or any other type of entity. Chemists may precisely compare various chemicals and their responses on a broad scale thanks to the mole.

PV = nRT

1.2 atm × 31 L = n×0.0821 atm.L/ mol.K   × 360 K

37.2 atm.L = n× 29.556 atm.L/ mol

n = 37.2 atm.L / 29.556 atm.L/ mol

n = 1.259 mol

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Answer:

Showers

Drinking Water

Waching your hands

Explanation:

Answer:

Drinking Water

Showering

Washing dishes

Washing your hands

Watering the plants

Cooking (to boil pasta and/or noodles and things such as that)

Answer:

A solar eclipse occurs when the moon gets between Earth and the sun, and the moon casts a shadow over Earth. A solar eclipse can only take place at the phase of new moon, when the moon passes directly between the sun and Earth and its shadows fall upon Earth's surface.

Explanation:

Answer:My guess is the gravitational force between the objects or substances.

Answer:

3.56x10²³ atoms

Explanation:

To solve this question we need first to determine the moles of iron (II) chloride, FeCl₂, using its molar mass. Then, using Avogadro's number we can solve for the number of atoms:

Moles FeCl₂ - Molar mass: 126.751g/mol-

25g FeCl₂ * (1mol / 126.751g) = 0.1972 moles

Number of atoms:

1 mole of FeCl₂ are 6.022x10²³ molecules of FeCl₂, that means 0.1972moles are:

0.1972mol * (6.022x10²³ molecules / 1mol) = 1.188x10²³ molecules of FeCl₂

In 1 molecule of FeCl₂ there are 3 atoms (1 of Fe and 2 of Cl), in 1.188x10²³ molecules of FeCl₂ there are:

1.188x10²³ molecules of FeCl₂ * (3atoms / molecule) =

Answer:

Explanation:

In this chemistry lab, students investigate how to build and launch a simple rocket that uses hydrogen and oxygen gases that will be mixed to propel the rocket (large bulb plastic pipette). Students will understand the principles of combustion reactions, kinetics, stoichiometry of reactions, activation energy, explosive mixtures, rocketry, and different types of chemical reactions. Students will explore and determine the proportions of hydrogen and oxygen mixture that will achieve the best launch results. Students will compare the balanced chemical reaction of hydrogen and oxygen with their lab results; students should discover that the optimal distance occurs when the mixture of hydrogen and oxygen is two to one hydrogen, oxygen mixture ratio and this can be determined theoretically from the balanced chemical reaction equation. Students will perform the lab, collect data, and discuss, compare, and contrast their lab findings with the balanced chemical reaction equation. Students will present their structured inquiry investigations using a power-point presentation. Other groups along with the teacher will assess each group by using a provided rubric. Group assessments will be the deciding assessment for the final lab score. A follow up activity could investigate how NASA scientists launch real rockets into space and propose a procedure to investigate and collect data on a launching a heavier object at the school football field.

Answer:

100 celsuis

Explanation:

because it melts faster at a 100 degrees Celsius.

Answer:

C: The Fe is not balanced

Explanation:

The reaction expression is given as:

          Fe₂O₃   +   3H₂  →  Fe  +  3H₂O

The problem here is to find the specie that is not balanced.

                                                        Number of moles

Specie                               Reactant                                      Product

Fe                                              2                                                 1

O                                               3                                                3

H                                                6                                                6      

So, we see that Fe is not balanced.

Answer:

P O 2 = 5.21 atm P C O 2 = 4.79 atm

Explanation:

Hope it helps!

Answer:

they all have two electrons in their outermost shell

The elements of group 2 are alkaline earth metals that have two electrons in their outermost shell. So they have similar chemical and physical properties and tend to become positive ions in bond formation.

The elements present in group 2 include Beryllium, Magnesium, Calcium, Strontium, Barium, and Radium.  

The elements of group 2 are similar in their physical and chemical properties as all the elements have the same number of valence electrons. All alkaline earth metals are silvery-white-colored solids under normal conditions. They are also shiny and quite reactive.

The general electronic configuration of group 2 elements is ns². The alkaline earth metals have fully filled s-orbital in their valence shells, they tend to lose two electrons to produce cations with +2 charge.

Therefore, the elements of group 2 are electropositive in nature. Therefore, all the given statements about group 2 of the periodic table are true.

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formula p=m/V

Explanation:

0.79

6.35

1.79

To find the density you have to divide the mass by volume

hope it helps!

Answer:

Hope this helps! :)

Explanation:

A half reaction is either the oxidation or reduction reaction component of a redox reaction. A half reaction is obtained by considering the change in oxidation states of individual substances involved in the redox reaction.

Answer:

All of the energy from the Sun that reaches the Earth arrives as solar radiation, part of a large collection of energy called the electromagnetic radiation spectrum. Solar radiation includes visible light, ultraviolet light, infrared, radio waves, X-rays, and gamma rays. Radiation is one way to transfer heat.

Explanation:

I hope this helps

Answer:

Decrease

Explanation:

The lower you go, the colder because the sun can't reach lower levels of the ocean.

Answer:

decrease

Explanation:

less sunlight will be able to reach the farther down you go and the less sunlight there is the colder it gets

The Ancient Egyptians used simple sundials and divided days into smaller parts, and it has been suggested that as early as 1,500BC, they divided the interval between sunrise and sunset into 12 parts. ... Known as a clepsydra, it uses a flow of water to measure time.

Answer:

In a chemical reaction, only atoms are present in the reactant and can end up with molecules. No new atoms are created and no more atoms are destroyed. In a chemical reaction, reactants contact with each other and the bond between atoms in the reactant is broken and atoms rearrange and form new bonds to make the product.

Explanation:

Answer:

A) Climate

Hope this helps !

The average weather condition of a region is known as Climate. Thus, the correct option for this question is A.

The five main factors which affect the climate of a region are Latitude, Altitude, relief, currents and winds, and distance from the sea. Apart from this, some other natural factors like the shape of the land, distance from the equator, and the El Niño phenomenon, are also responsible for determining the climate of a particular region.

Climate is the long-term pattern of weather in a particular area. Weather can change from hour-to-hour, day-to-day, month-to-month, or even year-to-year. Climate may also be characterized as the average course or condition of the weather at a place usually over a period of years as exhibited by temperature, wind velocity, and precipitation.

Therefore, the average weather condition of a region is known as Climate. Thus, the correct option for this question is A.

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Answer:

lipid bilayer

Explanation:

I looked it up .

Answer:

0.01504 mol/dm3

Explanation:

Calcium Hydroxide - Ca(OH)2

Hydrochloric acid - HCl

The reaction between both is given as;

2HCl   +   Ca(OH)2   --> CaCl2  + 2H2O

2   :  1

The relationship between the concentration and volume is given as;

CaVa  /  CbVb = na  /  nb

where a = acid (HCl) and b = base Ca(OH)2

Inserting the values;

0.04 * 18.8  /  (Cb * 25)  =  2 / 1

0.752 / 25Cb = 2

Cb = 0.752 / 50  = 0.01504

Answer:

The answer is 32. 29

Explanation:

Answer:

my sister said is in between b are a so that is what my sister thinks

Answer:

One oxygen atom I think..as C10 is 10 atoms of carbon, and H20 is two atoms of hydrogen with one atom of oxygen

Explanation:

Answer:

Ridges

Explanation:

Ridges separate watersheds

Hope this helped!

Answer:

Both A and B will be chemically unreactive

Explanation:

Answer:

C

Explanation: