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If 2.5 grams of calcium bromide reacted with excess lithium oxide, how many grams of bromide product would be formed?

Answer:

calcium oxide

Explanation:

its stable

There are several metals which can be used to reduce the metal oxides to corresponding metals. Carbon is an efficient reducing agent. Here Calcium oxide cannot be reduced to calcium by carbon. The correct option is C.

The reaction of metals with oxygen result in the formation of oxygen containing compounds called metal oxides. The binary compounds of oxygen with lesser electronegative elements are called oxides. Most of the stable oxides have 'O' in its -2 oxidation state. Na₂O, CO₂, etc. are some oxides.

Carbon is a reducing agent and it is present above the elements like 'Zn', 'Cu', 'Fe', 'Ag', etc. in the electrochemical series. But the oxides of highly reactive metals cannot be reduced with carbon. Because these metals have more affinity for oxygen than carbon.

The highly reactive metals are extracted by using the electrolytic reduction of their molten chloride. It is not possible for carbon to reduce the oxides of metals like 'Na', 'Ca', 'Al', etc.

Thus the correct option is C.

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Answer:

i think its c somebody correct me if im wrong. but hope this help

Explanation:

Answer:

its an insulator

Explanation:

they block electricity from passing

The mass of the solution : 105 g

Given

5 g sugar

100 ml water

Required

The mass of the solution

Solution

Density is a quantity derived from the mass and volume  

Density is the ratio of mass per unit volume  

Density formula:  

[tex]\large {\boxed {\bold {\rho ~ = ~ \frac {m} {V}}}}[/tex]

ρ = density  

m = mass  

v = volume  

Density of water = 1 g/ml

So mass of water :

= density x volume

= 1 g/ml x 100 ml

= 100 g

So total mass of solution :

=mass sugar+mass water

= 5 g + 100 g

= 105 g

Answer:

Carbon Cycle

Explanation:

When a plant dies, it often decomposes and becomes part of the soil. This process is one step in carbon cycle

The  soil is  nothing but a mixture that contains minerals, organic matter, and living organisms, it is a loose sediment. Moreover, there are different types of soil such as Clay Soil, Sandy soil, Loamy Soil, Silt Soil

soil composed of 45% minerals, 50% spaces or voids and 5% organic matter, it performs many important functions such as Providing a growth medium for the plants, Acts a modifier of the earth’s atmosphere and it is One of the most crucial components of the biosphere

The formation of soil occur  by weathering of rocks. the weathering of Solid rock can weather occur in three way such as Mechanical Weathering, Chemical Weathering, Biological Weathering

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H2SO4 + 2RbOH -> Rb2SO4 + 2H2O

If you want an explanation, keep reading.

In the first portion, there are two hydrogen ions and four sulfate ions.

The second portion has one rubidium ions and one hydroxide ion.

On the other side of the equation, in order to keep those two rubidiums balanced, you'll need to add a two at the beginning of the second portion, but in that process you are giving a second hydroxide value.

Back to the right side, there is there is water (H2O).

On the first portion, there were two hydrogen ions. The second portion also has two hydroxides because of the value change (adding the two to the front).

So on the fourth portion, you'd have to add another two so you could balance the four hydrogen ions (H2 and 2OH) and the two oxygen ions (2OH).

I hope this was easy to understand.

Answer:

if hyper its probaly because the have ADHD which is a type of drug that helps people with behavior disorders . the might have ticks wich is something that people can not control.

Explanation:

Answer:

Ag should be the correct answer

Answer:

geothite

Explanation:

i did a test on this a few months ago

Answer:

sphalerite i think

Explanation:

Answer:

The valence electrons are the only parts of an atom that make chemical bonds. Noble gases don't form chemical bonds because they have a full outer shell (8 electrons).

Answer:

The displacement of the sound wave for Sound A + B at 0.1025 is;

D. 1.6162

Explanation:

The sum of the displacement of two sound waves is given by the principle of superposition as follows;

y(x, t) = [tex]y_m[/tex]·sin(k·x - ω·t) + [tex]y_m[/tex]·sin(k·x - ω·t + ∅)

Therefore, by the property of the superposition of waves, the amplitudes of linear waves are added linearly when they meet at the same point at a the same time

The given parameters for the wave are;

The time at which the value of the wave amplitude are given, t = 0.1025 seconds

The displacement of the sound wave A at the given time, "t" is A = 0.9739

The displacement of the sound wave B at the given time "t" is B = 0.6423  

Therefore, the displacement of the sound A + B = 0.9739 + 0.6423 = 1.6162

Answer:

Mold fossil

Explanation:

It's called a mold fossil because they are formed when sediments bury an organism and then the sediments are changed into rock; then the organism decays thereby leaving a cavity in the shape of the organism

The statement which is considered to be a good example of radiation is: B. Earth is heated by energy from the Sun.

In Science, there are three (3) main types of heat transfer and these include:

Radiation can be defined as the transmission (transfer) of energy in the form of waves particles through a material medium or space. Thus, radiation is a type of heat transfer which causes a person on Earth that is sitting under the Sun to feel warm.

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Explanation:

unorganized and unsorted i think this is the answer

Answer:

(a) Decomposition: A substance breaks down to smaller species. [e.g. CaCO3(s) → CaO(s) + CO2(g) Decomposition of limestone to calcium oxide (quicklime) and carbon dioxide on heating.]

Answer:

washing dishes only when the dishwasher is full

Explanation:

Out of the following options, the best way to conserve water is:

B. washing dishes only when the dishwasher is full

Conserving water is important because it keeps water pure and clean while protecting the environment.

Thus, option B is correct.

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The question is incomplete, the complete question is;

An alcohol thermometer makes use of alcohol's changing _______ in order to measure temperature. As the temperature goes up, the alcohol contained in the thermometer increases in volume, filling more of the thermometer's tube.

A.

mass

B.

state

C.

chemical composition

D.

density

Answer:

D.

density

Explanation:

Every kind of thermometer makes use of a change in a particular physical property of a substance as a measure of temperature. It must be a property that changes with temperature.

Density of a substance changes with temperature. Even though the mass of alcohol in glass remains constant, but its volume increases or decreases with change in temperature leading to a change in volume and consequently a change in density of the alcohol in glass. This change is used as a measure of the change in temperature.

Answer:

To me it means no need to be so hard on yourself because nobody is perfect. You should love yourself for who you are and try to improve yourself everyday.

Explanation:

):)

Answer:

Chloroplast: An organelle that contains chlorophyll and in which photosynthesis takes place

Chlorophyll:  A green pigment present in all plants that absorbs light to provide energy for photosynthesis

Energy: A capacity to do work that can produce physical changes within living and nonliving systems

Glucose:A type of sugar that is produced during photosynthesis to store chemical energy

hope it helps!

Answer: look at picture for the answer, and I showed that I got it right as well. It was worth 4 points and I got all 4. Brainiest please, if you don't mind <3

The volume of O₂ produced: 84.6 L

Given

7.93 mol of  dinitrogen pentoxide

T = 48 + 273 = 321 K

P = 125 kPa = 1,23365 atm

Required

Volume of O₂

Solution

Decomposition reaction of dinitrogen pentoxide

2N₂O₅(g)→4NO₂(g)+O₂ (g)

From the equation, mol ratio N₂O₅ : O₂ = 2 : 1, so mol O₂ :

= 0.5 x mol N₂O₅

= 0.5 x 7.93

= 3.965 moles

The volume of O₂ :

[tex]\tt V=\dfrac{nRT}{P}\\\\V=\dfrac{3.965\times 0.082\times 321}{1.23365}\\\\V=84.6~L[/tex]

Answer:

d making models.

Explanation:

When scientists create a representation of a complex process, they are inferring that they are making models.

A model is an abstraction of the real world or a complex process. Models are very useful in developing solutions to processes that are not easily simplified.

Answer:

D. making models.

Explanation:

Answer: Multiply the mass by the inverse of molar mass, and then multiply by Avogadro's number.

Explanation: Convert the mass to moles, multiply the number of moles by the ratio of the number of atoms or ions to one mole, multiply by Avogadro's number.

Answer:

Uranium mines operate in many countries, but more than 85% of uranium is produced in six countries: Kazakhstan, Canada, Australia, Namibia, Niger, and Russia. Historically, conventional mines open pit or underground were the main source of uranium.

Explanation:

Hope this helps

The number of atoms that are in 0.340 moles of sodium is 2.047×10²³ atoms.

Avogadro's number is equal to 6.022×10²³ which gives idea about the number of atoms present in one mole of any substance.

i.e. In 1 mole = 6.022×10²³ atoms

Given moles of sodium = 0.34 mol

Number of atoms of sodium in given moles will be calculated as:

No. of Na atoms = 0.34mol × 6.022×10²³ atoms/mol = 2.047×10²³ atoms

Hence required number of atoms are 2.047×10²³ atoms.

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Answer:

transform

Explanation:

The type of plate boundary associated with sliding or shear forces is a transform plate boundary.

Two or more plates slides laterally past one another due to presence of shear forces acting on them.

Answer:

convergent

Explanation: