A hypothesis .........

Answer:

A

Explanation:

As do to freed atoms more able to conduct electricity in molded state which can occur if melted or dissolved

Answer:

30.8

Explanation: AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA

30.08

i recommend looking at a map for these kinds of questions.

Answer:

a chemiacal

Explanation:

We have that for the Question,it can be said that How much hydrogen chloride was used in the reaction is

From the question we are told

Magnesium (24.30g) reacts with hydrogen chloride (xg) to produce hydrogen gas(2.04g) and magnesium chloride (96.90g).

Generally the equation for the Reaction is  is mathematically given as

Mg+2HCl-----MgCl2+H2

Grams of MgCl2=[tex]\frac{96.9*24.30}{2.04}\\[/tex]
Grams of MgCl2=1154.25g

Therefore

ON cK -12

How much hydrogen chloride was used in the reaction is

x=74.42

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Answer:

answer is 2 ............

Answer:

Physical changes only change the appearance of a substance, not its chemical composition. Chemical changes cause a substance to change into an entirely substance with a new chemical formula. Chemical changes are also known as chemical reactions.

Explanation:

this is what believe the answer is

Answer:

1:1

Explanation:

The ratio of metal cationic atom to non-metal anionic atom in the compound is 1:1.

This is an ionic compound.

Answer:

29 i think

Explanation:

Answer:

V = 10.3 L

Explanation:

Given data:

Mass of methane = 6.40 g

Volume of CO₂ produced = ?

Temperature = 35°C (35+273 = 308 K)

Pressure = 100.0 KPa (100.0/101 = 0.98 atm)

Solution:

Chemical equation:

CH₄ +  2O₂        →       CO₂ + 2H₂O

Number of moles of CH₄:

Number of moles = mass/molar mass

Number of moles = 6.40 g/ 16 g/mol

Number of moles = 0.4 mol

Now we will compare the moles of CO₂ with CH₄.

         CH₄          :         CO₂

           1             :           1

        0.4            :         0.4

Volume of CO₂:

Formula:

PV = nRT

0.98 atm ×V = 0.4 mol ×0.0821 atm.L/mol.K ×  308 K

0.98 atm ×V = 10.11 atm.L

V = 10.11 atm.L /0.98 atm

V = 10.3 L

Answer:

C. is the correct answer

Explanation:

Answer: By performing the flame test

Explanation:

The flame test can be performed by the teacher to visually identify the substance in the solution. The metals give a characteristic color on burning. The heat of the flame causes the excitation of the electrons present in the metal ions this leads to release of energy along with the emission of visible wavelength of light. This visible light can be observed by human eye. For example, the copper produces the blue color in flame, barium gives green flame, and sodium gives yellow flame.

Answer:

Unbalanced, then balanced OR only unbalanced

Explanation:

At first, the force is unbalanced. This is what is causing the car to move. Then, the car slows down. If the car were to stop, then it would be unbalanced, then balanced. However, if the car never stops, then it would stay unbalanced the whole time. While it is not a specific answer, I hope this helps!

Answer:

the forces action on the car are only balanced hen unbaclanced

Explanation:

Answer:

B.) kinetic energy from wind turns blades on wind turbine → wind turbine blades turn generator → generator changes kinetic energy to electricity

Explanation:

correct on edge

just took the quiz

The correct order of steps when using wind to generate electricity is kinetic energy from wind turns blades on wind turbine → wind turbine blades turn generator → generator changes kinetic energy to electricity. Therefore, option B is correct.

The energy an item has as a result of motion is known as kinetic energy. A force must be applied to an item in order to accelerate it. We must put forth effort in order to apply a force.

Kinetic energy has the following formula: K.E. = 1/2 mv², where m is the object's mass and v is its square velocity.

The kinetic energy is measured in kilograms-meters squared per second squared if the mass is measured in kilogrammes and the velocity is measured in metres per second.

The steps when using wind to generate electricity is kinetic energy from wind turns blades on wind turbine → wind turbine blades turn generator → generator changes kinetic energy to electricity.

Thus, option B is correct.

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Answer:

✖︎ Mixture←  is the right answer answer, so don't choose that....…

THE corrects answer would be MIXTURE

!!!!!!Brainliest??

EXPLANATION

✰1.  I take the quiz

✰2. The word already describe it self, mixture is a substance made by mixing other substances together.

✰a mixture is a material made up of two or more different substances which are physically combined. A mixture is the physical combination of two or more substances in which the identities are retained and are mixed in the form of solutions, suspensions and colloids.

Explanation:

1one electron and -1 for anions

2 O2- indicates an ion of oxygen having two extra electrons. I.e., since an oxygen atom normally has 8 protons and 8 electrons, this ion has 10 electrons (-10 charge) and 8 protons (+8 charge) giving it a charge of -2 (-10 + 8 = -2).

...

Answer:

Explanation:

given,

velocity = 5m\s

mass = 50kg

kinetic energy = ?

therefore, we know that,

kinetic energy = 1\2 * mass * velocity^2

                        = 1\2 * 50* 5 ^ 2

                        = 1\2 * 50* 25

                         = 1\2 * 1250

                         = 625

therefore, kinetic energy is 625

HOPE IT HELPED :D

Answer:

Here

Explanation:

Some assume our planet's changing distance from the sun causes the change in the seasons. That's logical, but not the case for Earth. Instead, Earth has seasons because our planet's axis of rotation is tilted at an angle of 23.5 degrees relative to our orbital plane, that is, the plane of Earth's orbit around the sun

Answer:

Climates at different latitudes are similar to one another.

Explanation:

The choice that is not a proof of Wegener's concept of concept of continental drift is that climates at different latitudes ae similar to one another.

Answer:

Climates at different latitudes are similar to one another.

Standard pressure is equal to 1 atm. Therefore option 1 is correct.

Standard pressure is equal to 1 atm, which stands for atmosphere. It is a unit of pressure commonly used in the field of chemistry and physics. Standard pressure is defined as the pressure exerted by a column of mercury in a barometer when the atmospheric conditions are at standard temperature and pressure (STP).

STP is defined as a temperature of 0 degrees Celsius (273.15 Kelvin) and a pressure of 1 atmosphere (1 atm). Therefore, at STP, the standard pressure is equal to 1 atm.

While pressure can be measured in various units such as pascals (Pa), kilopascals (kPa), and atmospheres (atm), the standard pressure is specifically defined as 1 atm.

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Answer:

Barium (Ba), Cobalt (Co) ,Copper (Co),Helium (He)

is it Copper (Co)?

Answer:

Is soft

Explanation:

because concrete is hard ash so t hink flour would be safer

Answer:

c

Explanation:

all the atoms must be balanced.

Answer:

4.3/5. 129

Explanation:

Hope this is correct

Answer:

false

Explanation:

Answer:

Electrons

Explanation:

They mad chillin da electron cloud.

Answer:

LI

Explanation:

There is three Li in the start but One Li after

Answer:

Ethier a or c

Explanation:

Answer:

it is because in winter there is a situation of cold means there is less movement in particles of water thats why it happens.

you may also be knowing in particles of matter have constant movement at all time.

Answer:

15000N/m²

Explanation:

Given parameters:

Force exerted by the girl  = 450N

Area  = 300cm²

Unknown:

Pressure exerted by her feet  =?

Solution:

Pressure is the force per unit area on a body;

    Pressure  = [tex]\frac{force }{area}[/tex]

We need to convert the given area to m²;

        10000cm²   =  1m²

        300cm²  = [tex]\frac{300}{10000}[/tex]   = 0.03m²

Pressure = [tex]\frac{450}{0.03}[/tex]   = 15000N/m²