which of the following is formed by intense heat and pressure over millions of years?

A:Igneous
B:Metamorphic
C:Sedimentary
D:Magma

Answer:

D

Explanation: Trust me

The triple beam balance measures the mass of an object in grams.

Explanation:

           Middle beam = Increments of 100 grams

           Front beam = Increments from 0 grams  to 10 grams

           Farther beam = Increments of 10 grams

So, from this, we can conclude that the triple beam balance measures the mass of an object in grams. Hence the correct answer is option A.

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Answer:

EFFECTS OF WATER POLLUTION

In addition, here are some of the other consequences: Destruction of biodiversity. Water pollution depletes aquatic ecosystems and triggers unbridled proliferation of phytoplankton in lakes — eutrophication —. Contamination of the food chain

Answer:

Temporal lobes

Explanation: They are right above the ears...And they help us process sounds...They are also important for learning and memory, as well as the understanding of language

Answer:

D. Both atoms share their electrons.

Explanation:

Answer:

10.54 M

Explanation:

First you multiply 154.9 by 262 to get the mols and then you divide that number by 3850.45540796906 L and you get 10.54 M.

Answer:

Crude oil is refined to make petrol (in America this is known as gasoline) or diesel. Most forms of transport use either petrol or diesel to power their engines - from lawnmowers, cars, buses and motorbikes to large ships and aeroplanes.

Answer:

Temperature is a measure of "average kinetic energy" of the particles in an object

Answer:

V = 39.38 L

Explanation:

Given that,

No. of moles of H₂, n = 2

Temperature, T = 300 K

Pressure, P = 1.25 atm

We need to find the volume occupied by the gas. We can use the ideal gas law to find it such that,

[tex]PV=nRT[/tex]

Where

R is gas constant, R = 0.08205 L-atm/mol-K

V is volume of the gas

Rearranging the above formula for V. So,

[tex]V=\dfrac{nRT}{P}\\\\V=\dfrac{2\times 0.08205\times 300}{1.25}\\\\V=39.38\ L[/tex]

So, the volume occupied by the gas is 39.38 L.

Answer:

Maybe you could do something with nuclear power plants and how we use those to create electrical energy for our phones, houses etc?

Answer:

Nitrous oxide,Sulfur trioxide,  Lithium oxide, Lithium oxide,Aluminium oxide, Dichlorine monoxide, Sulfur dioxide, Chromium trioxide, Magnesium oxide,Dichlorine Pentoxide, Potassium oxide, Barium oxide

Explanation:

Answer: around 137.33

Explanation:

Answer:

The term "phenotype" refers to the observable physical properties of an organism; these include the organism's appearance, development, and behavior

An organism's phenotype describe appearance, development, behavior, maybe even levels of hormones or blood cells.

Answer:

HF is the limiting reactant

Explanation:

The balanced equation for the reaction is given below:

SiO₂ + 4HF —> SiF₄ + 2H₂O

From the balanced equation above,

1 mole of SiO₂ reacted with 4 moles of HF.

Finally, we shall determine the limiting reactant. This can be obtained as illustrated below:

From the balanced equation above,

1 mole of SiO₂ reacted with 4 moles of HF.

Therefore, 7.5 moles of SiO₂ will react with = 7.5 × 4 = 30 moles of HF.

From the calculation made above, we can see clearly that it will take a higher amount (i.e 30 moles) of HF than what was given from the question (i.e 5 moles) to react completely with 7.5 moles of SiO₂.

Therefore, HF is the limiting reactant and SiO₂ is the excess reactant.

Answer:

The electronic configuration of iron is: Ar3d64s2. the two electrons in the 4s orbital are paired, and two of the electrons in the 3d orbitals are paired leaving four unpaired electrons. In general when you are populating the p, d, f, etc

Explanation:

hope dis help

Answer:Phosphate

Explanation:It is called phosphate because of this higher state (otherwise it would be called phosphite and be PO3+3 ).

Answer:

POT B

Explanation:

Because Pot B contains lesser amount of water, it is going to have the hottest water compared to pot A.

Since the amount of heat is constant, in pot B less water molecules would share the heat, compared to pot A where a larger amount of water would have to share the heat.

Answer:

[tex]\boxed {\boxed {\sf 60 \%}}[/tex]

Explanation:

Percent yield is a ratio of the actual yield to the theoretical yield. It is found using this formula:

[tex]\% \ yield= \frac {actual \ yield}{theoretical \ yield} *100[/tex]

The actual yield is 12 liters, because that was actually produced in the lab.

The theoretical yield is 20 liters, because that was the expected yield.

[tex]\% \ yield= \frac {12 \ L}{20\ L} *100[/tex]

[tex]\% \ yield= 0.6*100[/tex]

[tex]\% \ yield= 60[/tex]

For this reaction, the percent yield is 60%.

Answer:

Savannas are grasslands found in Africa, Australia, South America, and India. The climate is warm or hot. Savannas experience both dry and rainy seasons. Each year, savannas receive about 20 to 50 inches of rain in a span of six to eight months. The other months are dryer. There’s also a threat of wildfires because of the severe dryness during these months. Grasslands are true to their name because their vegetation is mostly grass. Savannas are home to a wide range of animals, including different species of beetles and insects, which many creatures consume. Squirrels, mice, elephants, gazelles, and antelopes are the plant-eating animals that live in the savanna. Hyenas, lions, and leopards are some of the meat-eating animals in these areas. Some of the nonliving components of the system include very porous soil that allows water to drain easily.

Explanation:

this is the edmentum answer    :)

Answer:

Physical change

Explanation:

Cutting and freezing are both examples of physical changes that do not alter the chemical composition or properties of the object/substance.

Answer:

physical change

Explanation:

carrot lost its original shape

Answer:

39.6 g

Explanation:

The equation of the reaction is;

2Mg(s) + O2(g) --------> 2MgO(s)

To obtain the limiting reactant;

Number of moles in 26.4 g of Mg = 26.4g/24 g/mol = 1.1 moles

If 2 moles of Mg yields 2 moles of MgO

1.1 moles of Mg yields 1.1 * 2/2 = 1.1 moles of MgO

Number of moles in 26.4 g of O2 = 26.4 g/32g/mol = 0.825 moles

If 1 mole of O2 yields 2 moles of MgO

0.825 moles of O2 yields 0.825 moles * 2/1 = 1.65 moles of MgO

Hence Mg is the limiting reactant.

Theoretical yield of MgO = 1.1 moles of MgO * 40 g/mol = 44 g

Percent yield = 90%

Percent yield = actual yield/theoretical yield * 100

Actual yield = Percent yield * theoretical yield/100

Actual yield = 90 * 44/100

Actual yield = 39.6 g

Answer:

apply

does not

does not

does not

Explanation:

The Second Law of Thermodynamics is applicable to only a reaction vessel that is  completely sealed and insulated as the entropy remains constant during such chemical change.

Chemical changes are defined as changes which occur when a substance combines with another substance to form a new substance.Alternatively, when a substance breaks down or decomposes to give new substances it is also considered to be a chemical change.

There are several characteristics of chemical changes like change in color, change in state , change in odor and change in composition . During chemical change there is also formation of precipitate an insoluble mass of substance or even evolution of gases.

There are three types of chemical changes:

1) inorganic changes

2)organic changes

3) biochemical changes

During chemical changes atoms are rearranged and changes are accompanied by an energy change as new substances are formed.

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Answer:

Explanation:

Answer:

A WAVE CARRIED THROUGH A ROPE

Explanation:

I chose a wave on water and got it WRONG

The set of explanations that has the correct representation for the chemical equation are aq and g. Thus the correct options are 3 and 4.

The chemical equation has been written with the symbols of the product and the reactant. The chemical equation has the moles of an element that has been reacted. The moles have written prior to the compound as the coefficient.

The compounds state has also been present in the chemical equation. The compounds in the reaction can be present as:

The symbol has been added to the compound to depict the state of the compound in the chemical reaction. The symbols used for the following states are:

The set of explanations that has the correct representation for the chemical equation are aq and g. Thus the correct options are 3 and 4.

For more information about the chemical equations, refer to the link:

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Answer:

CAN U HELP ME

Explanation:

PLS

Answer:

Particles in a: gas are well separated with no regular arrangement. liquid are close together with no regular arrangement. solid are tightly packed, usually in a regular pattern.

Explanation:

Answer:

286

Explanation:

see ur periodic table

Answer:

I will use pulley b

Explanation:

because the pulley with more efficency can carry out the work better