Two glass rods are rubbed together. One of the glass rods are brought near (but
does not touch) an uncharged pith ball. Would you expect the pith ball to attract,
repel, or do nothing? Explain why.

Answer:

Probably around 6 because the ph of hydrochloric acid is 3

Explanation:

Explanation:

One atom of carbon (2.4) combines with two atoms of oxygen (2.6) to form the compound carbon dioxide CO2 (only the outer shell of carbon's electrons are shown). ... The carbon dioxide molecule is held together by the strong C=O. carbon–oxygen double covalent bonds by sharing electrons.

Explanation:

The new pressure can be found by using the formula for Boyle's law which is

[tex]P_1V_1 = P_2V_2 \\[/tex]

Since we're finding the new pressure

[tex]P_2 = \frac{P_1V_1}{V_2} \\[/tex]

We have

[tex]P_2 = \frac{25 \times 1}{125} = \frac{25}{125} = \frac{1}{5} = 0.2 \\ [/tex]

We have the final answer as

Hope this helps you

Answer:

The relative molecular mass of ammonium nitrate is 80 gm

Explanation:

[tex]M_{NH4NO3}[/tex] = 14 + (4 × 1) + 14 + (16 × 3) = 80 (gm)

Answer:

3.45 L

Explanation:

Temperature and volume are linearly related (when one increases or decreases, so does the other).

Convert the temperature to Kelvin:

50 °C = 323 K

100 °C = 373 K

To find the rate of change, divide 373 by 323 to get roughly 1.15

Multiply the amount of liters by this factor to get your answer

Answer:

cell :—

•They lack a well-defined nucleus, have a nucleoid instead.

•Usually have double-stranded, circular DNA.

•Do not have mitochondria.

Eukaryotic cell :—

•Have a well-defined nucleus enclosed in the nuclear membrane.

•Have a linear double-stranded nucleus.

•Mitochondria are present.

Answer:

C

Explanation:

Answer:

1. Hot air rises and cold air descends for exactly the same reason

Matter are anything that is made up of atoms. The quantity of matter can be seen only on the basis of mass and volume calculation. Therefore, warm air rise and cold air sink.

Matter is a substance that has some mass and can occupy some volume. The matter is mainly used in science.

Matter is anything that is made up of atoms. Mass can also be represented as number of molecules. We also saw that matter occupy some volume and that volume is measured only in liter.

Warm air rises while cold air descends. This is because hotter air takes more energy than cooler air. Furthermore, hot and cold temperatures are precisely proportionate to their density. As a result, when it's really hot, the hotter air is more likely to rise than when it's very cold.

Therefore, warm air rise and cold air sink.

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Answer:

im not sure

Explanation:

Answer:

mechanical energy to electrical energy

Explanation:

The water turns the turbine with produces mechanical energy so the generator converts it to electrical energy

so the other guy can have branliest have a wonderful summer guys! :)

Answer:

Explanation:

The pH of a solution can be found by using the formula

[tex]pH = - log ([ {H}^{+} ])[/tex]

From the question

[H+] = 0.045 M

We have

[tex]pH = - log(0.045) \\ = 1.346787...[/tex]

We have the final answer as

Hope this helps you

Answer:

1.35

Explanation:

Answer:

Explanation:

Wind is more of an efficient power source than solar. Compared to solar panels, wind turbines release less CO2 to the atmosphere, consume less energy, and produce more energy.

Answer:

A. 1:1

Explanation:

The ratio of metal cationic (+) atom to nonmetal anionic (-) atom in the sodium and bromine compound is 1:1 because sodium needs to lose one electron and bromine needs one electron to become stable and complete its outermost shell. When sodium lose electron, it become cation and gain +1 charge while on the other hand, the bromine accept one electron and become anion and gain -1 charge so that's why we can say that there is 1:1 of metal cationic (+) atom to nonmetal anionic (-) atom in the sodium and bromine compound.

gene therapy

Explanation:

Gene therapy, also called gene transfer therapy, the introduction of a normal gene into an individual's order to repair a mutation that causes a genetic disease.

Answer:

C artificial selection

Explanation:

Brainly please

Answer: The reactivity of group 1 elements increases as you go down the group because: the atoms become larger. the outer electron becomes further from the nucleus. the force of attraction between the nucleus and the outer electron decreases.

Answer:

B. 4Na + O2 → 2Na2O

Explanation:

Got it right on the test :)

For balanced  equation the mass of reactant is exactly equal to the mass of product. atoms of reactant equal to the atoms of product is called as balanced equation.

The law of conservation of mass, which states that "the total mass of all the products of reaction in a chemical reaction is equal to the total mass of all the reactants," is satisfied by balancing chemical equations.

A balanced chemical equation, in which the masses of the reactants and products are equal, contains the same amount of atoms of each element on both sides of the equation.

4Na + O₂ ⇒  2Na₂O₂

In this reaction in reactant there are four number of sodium atom and in product also four number of sodium atom. Similarly total number of oxygen at reactant is equal to the total number of oxygen at product.

Thus, option B is correct.

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Answer:

electricity

Explanation:

A circuit is used in every electrical and electronics operation.

Answer:

.biology and maybe physics

Answer:

Biologist

ExplanationBiologist Unlike the above type of scientist, geoscientists’ work involves exploring the earth and its internal environment. They study the composition, structure, and processes of the earth by being indoors and outdoors. They contribute to the discovery of mines, petroleum deposits, minerals, and other aspects of the earth.

Answer:

true

Explanation:

Answer:

Sorry I really don't know but can you help with one of my question I posted please thanks.

D melting ice cream because if u know what a physical change is its a change that you can reverse chimical change are changes you cant reverse so u can freeze back ice cream so :D

Answer:

1.49kJ

Explanation:

Using the formula as follows;

Q = m × c × ∆T

Where;

Q = amount of heat (joules)

m = mass (g)

c = specific heat of silver (J/g°C)

∆T = change in temperature (°C)

According to the information given in this question;

mass of Silver (Ag) = 236g

c of Ag = 0.24 J/g°C

initial temperature (T1) = 8.5°C

final temperature (T2) = 34.9°C

∆T = T2 - T1 = 34.9 - 8.5 = 26.4°C

Using Q = m × c × ∆T

Q = 236 × 0.24 × 26.4

Q = 1,495.3 Joules

Amount of heat needed to raise the temperature of Silver (Q) in kilojoules is 1495.3/1000 = 1.4953

Q = 1.49kJ

Answer:

[tex]Al_2(SO_4)_3+3Mg(NO_3)_2\rightarrow 2Al(NO_3)_3+3MgSO_4[/tex]

Explanation:

Hello there!

In this case, for the given reactants side, we infer this is a double replacement reaction because all the cations and anions are switched around as a result of the chemical change, we infer that the products side include aluminum with nitrate and magnesium with sulfate as shown below:

[tex]Al_2(SO_4)_3+Mg(NO_3)_2\rightarrow Al(NO_3)_3+MgSO_4[/tex]

However, we need to balance since unequal number of atoms are present at both sides, thus, we do that as shown below:

[tex]Al_2(SO_4)_3+3Mg(NO_3)_2\rightarrow 2Al(NO_3)_3+3MgSO_4[/tex]

Thus, we make 6 Al atoms, 3 S atoms, 3 Mg atoms and 30 O atoms on each side in agreement with the law of conservation of mass.

Regards!