How can I solve this?

Answer:

94%

Explanation:

204/216=.94444

.94444*100=94.44%

Answer:

2NaCl = 2Na + 2Cl

Explanation:

Sodium chloride decomposes to form sodium and chlorine

Answer:

A. It causes rocks to change color

Explanation:

Weathering can be defined as the gradual decomposition of rock. This means, rocks are broken into pieces or sediments through the process of weathering.

There are two types of weathering process:

1. Physical weathering also known as mechanical weathering. This is the breakdown of rocks into smaller pieces without changing the composition of the rock. Physical weathering is caused by the action of ice, wind, plant growth.

2. Chemical weathering: Here, the rocks changes not just in size of pieces but in its composition. This is when other minerals are applied on the rock in other to dissolve it.

Answer:

1.6 M/min

Explanation:

Step 1: Given data

Step 2: Convert "t" to min

We will use the conversion factor 1 min = 60 s.

15 s × 1 min/60 s = 0.25 min

Step 3: Calculate the reaction rate

We will use the following expression.

r = -ΔC/t

r = -(0.6 M - 1 M)/0.25 min = 1.6 M/min

Answer:

option e

hope helps u

have a nice day

Answer:

C. 1

Explanation:

Group 1 metals are highly reactive (such as Sodium) and form 1 to 1 ratio of ions with halogens (such as chlorine, bromine etc).

This happens because group 1 element can donate 1 valence electron to fulfill their octet rule and halogens can receive 1 valence electron to fulfill their octet.

Answer:

bnsjsbbakakaisbsbwnsjznss

Explanation:

cnsjzjsnsnsjs ssnsnsnzksmnznnzna

Answer:

19.5

Please tell me if wrong.

When a car uses a gallon of gas, 22.0 miles per gallon of carbon dioxide is emitted into the environment.

After being released into the atmosphere, carbon dioxide (CO₂) is initially quickly dispersed among the atmosphere, the upper ocean, and plants.

The sources of carbon dioxide emissions include both natural and human activities. Decomposition, oceanic discharge, and respiration are examples of natural sources.

The annual carbon dioxide emissions from a typical passenger automobile are around 4.6 metric tonnes. This estimates that the typical gasoline car on the road today gets roughly 22.0 miles per gallon of fuel and travels about 11,500 miles annually.

Thus, 22.0 miles per gallon of carbon dioxide is emitted into the environment.

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Answer:

Los sólidos tienen una forma y un volumen definidos. Los líquidos tienen ... Para describir las fases sólida, líquida y gaseosa. El agua puede tomar muchas formas. ... Un líquido familiar es el mercurio metálico.

Answer: Proton

Explanation:

hydrogen ion is the basis of the pH scale. H:– = Hydride. Hydride is a hydrogen atom which has an extra electron.

Answer:

4Cr + __302 -->_2Cr203.....

Hydrochloric acid reacts with sodium hydroxide to form sodium chloride (the salt) and water. Sodium chloride is made up of Na+ cations from the base (NaOH) and Cl- anions from the acid (HCl). HCl+NaOH→H2O+NaCl.

I believe it's (A). It will double.

Explanation:

Charles law states that the volume of an ideal gas is directly proportional to the absolute temperature at constant pressure. (Charles's law).

The pressure, volume, and temperature are the main factors of the ideal gas. At constant pressure when the temperature is doubled, then volume also gets doubled. Thus, option A is correct.

The ideal gas law has been known as the law that relates the pressure, volume, moles, and temperature of the gas particles. The relationship between the volume and the temperature of the gas was given by Charle's law.

According to Charle's law, the volume and the temperature have been known to have direct relation when the factor of pressure is said to be constant. If they exhibit the direct relation then doubling the temperature will double the volume of the gas.

Therefore, option A. the doubling of temperature doubles the volume is correct.

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Answer:

dfgdhfjkl;jhgfdsAZXcvdfcgbwegbfgvdavsbhgsvadrfgvrdt

Explanation:

Answer:

1..... nucleus

2......electron cloud

3.......protons

4........Neutrons

5..........electron

6............electrons

7...............Isotopes

8.....,...........ions

9....................charge

Answer:

The speed of a wave is how far the wave travels in one unit of time. (eg: seconds)

Explanation:

For instance, if the crest of a wave travels 30 meters in 2 seconds, the speed of that wave is 15 m/s.

Answer:

NOAA and FWS are required by law to compare background rates to current rates.

Explanation:

Answer:

If current rates greatly exceed background rates, scientists say there is a chance of a mass extinction event happening.

Explanation:

Scientists compare current rates of extinction to the background rate to see if there is a potential problem developing.

I got it right on the quiz.

Answer:

the heavy subatomic particles, protons, and neutrons, reside in the nucleus

Explanation:

The atom is envisioned by Ernest Rutherford as miniature solar system, involving electrons that is orbiting around a very massive nucleus, it is regarded as mostly empty space, having nucleus that occupy small part of the atom. He discovered that atom is regarded as mostly empty space, having a mass concentrated central nucleus. This nucleus is charged positively and it is been surrounded by electron which is negatively charged t

Large distance. In In the Rutherford nuclear-atom model,the heavy subatomic particles, protons, and neutrons, reside in the nucleus

Answer:

Molecule

Explanation:

when two or more than two non-metal elements are combined then it form Molecule.

Answer:

C. An electron has a high probability of being in certain regions.

Explanation:

In the electron cloud model, there are no electron-orbits around the nucleus but a cloud. This cloud has various densities with respect to distance from the nucleus. The most dense region of the cloud (which is the region close to the nucleus) is where electrons has the highest probability of existence.

The model explains that an electron a greater chance of being in the region closer to the nucleus. Thus, an electron has a high probability of being in certain region of the cloud about the central nucleus. And an electrostatic force exists between the nucleus and the electrons.

Answer:

c

Explanation:

Answer:

845.4

Explanation:

Answer:

78° C.

Explanation:

The final temperature of water is 81℃ , if it is allowed to cool from a temperature of 95  and  it releases heat of 1200J.

In the following question we will apply specific heat Capacity equation

q=mct Δt

q= 1200J   m= 20 g c= 4.186  T₁= 95 ℃

1200= 20 ✕4.186(95-T₂)

T₂=81℃

Hence, The water cools to 81℃ temperature

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Answer:The products of nuclear fusion are by far heavier than the reactants. Nuclear fusion is the combination of small atomic nuclei into larger ones.This reaction is accompanied with the release of a large amount of energy:

        ²₁H     +           ²₁H       →            ⁴₂He            +          energy

In the above reaction,

  two hydrogen atoms fuse and produce a heavier helium atom which differs from the combining atoms.

Explanation:

Answer:

A

Explanation:

Rock sand sun arent living.  cactus lizard sam and snake are living or biotic

Answer:

Hey mate.......

Explanation:

This is ur answer......

Climate change has been a key factor in increasing the risk and extent of wildfires in the Western United States. Research shows that changes in climate create warmer, drier conditions. Increased drought, and a longer fire season are boosting these increases in wildfire risk. But global warming has changed some of the underlying variables that make wildfires more or less likely to occur every year. Warmer temperatures increase the likelihood that fires will burn more intensely. They also cause snow to melt sooner, and lead to drier soils, forests, and plants, which act as kindling.

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Answer:

a0.0075 mi i think so ok but average is need to add and divide