answer both of these with simple explanation and you’ll get brain list

Answer:

if two negative charges are next to each other they repel.

But if positive and negative charges are next to each other they attract.

Explanation:

Why because like changes repel and unlike charges attract

Answer:

CuSO + NaOH --> CuOH₂ + Na₂SO₄

Explanation:

Answer:

In general, the number of valence electrons is the same within a column and increases from left to right within a row. Group 1 elements have just one valence electron and group 18 elements have eight, except for helium, which has only two electrons total.

Answer:

I'm pretty sure its a combination reaction!!

Explanation:

they generally form between metals and non metals like that^

Answer:

3224 kJ/mol

Explanation:

The combustion of benzoic acid occurs as follows:

C₇H₆O₂ + 13/2O₂ → 7CO₂ + 3H₂O + dE

The change in temperature in the reaction is the change due the energy released, that is:

3.256K * (10.134kJ / K) = 33.00kJ are released when 1.250g reacts

To find the heat released per mole we have to find the moles of benzoic acid:

Moles benzoic acid -Molar mass: 122.12g/mol-:

1.250g * (1mol / 122.12g) = 0.0102 moles

The dE combustion per mole of benzoic acid is:

33.00kJ / 0.0102moles =

3224 kJ/mol

Answer: The correct is 0.5 moles.

Explanation:

Answer:

CHARLES' LAW

given:

= 600 mL = 0.6 L

= 27 °C = 300.15 L

= 77 °C = 350.15 L

conversion:

= 600 mL (1 L / 1000 mL)

= 0.6 L

= 27 °C + 273.15 K

= 300.15 K

= 77 °C + 273.15 K

= 350.15 K

solution:

= ( × ) ÷

= (0.6 L × 350.15 K) ÷ 300.15 K

= 0.7 L

Answer:

is

Explanation:

the fest president is

Answer:

combustion reaction

Explanation:

Cos Milky Said it. Milky Smart.

Answer:

1. NO2

2.49.4%

Explanation:

1. Find the moles of each and divide by the smallest

N: 30/14=2.14/2.14=1

O: 62/16=3.875/2.14=1.81 (round to nearest whole number)

NO2

2. Find the total mass and divide by each

Total: 291.7167

There are 9 oxygens so multiply mass by 9

16*9=144

144/291.7167=0.493629607

Answer:

B.They show that the speaker’s memories come from various senses and seasons.

B.They show that the speaker’s memories come from various senses and seasons.

Explanation:

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Bohr's model is one of the ea.rliest model of atom in history, modified from Ruth.erford's model.

In 1913, a D.anish physi.cts, Niels Bohr refi.ned Ruth.erford model of the atom. How.ever, he disco.vers that elec.tron can only have spe.cific amo.unts of energy. These energy levels are also known as ele.ctron shells.

As for the Lewis Dot Structure, it is the m.odel of an atom that has the che.mical symbol for the ele.ment surronded by dots to rep.resent the valence ele.ctron of the ele.ment.

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HOPE IT HELPS

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Answer:

Promethium

Pm 61

Discovered by Jacob .A. Marinsky

Answer:

liquids

Explaination:

Answer:

One mole of ideal gas occupies 22.4L volume at STP

Explanation:

So., we treat carbon dioxide an ideal gas:

3 mol x 22.4L •Mol-¹ ≈? ?L

Answer:

0.25 mole of H₂

Explanation:

The equation for the reaction is given below:

Mg + 2HCl —> MgCl₂ + H₂

From the question given above, we were told that the reaction produced 5.6 L of H₂.

Thus, we can obtain obtain the number of mole of H₂ that occupied 5.6 L at STP as follow:

1 mole of H₂ occupied 22.4 L at STP.

Therefore, Xmol of H₂ will occupy 5.6 L at STP i.e

Xmol of H₂ = 5.6 / 22.4

Xmol of H₂ = 0.25 mole

Therefore, 0.25 mole of H₂ were obtained from the reaction.

Answer:

one to two inches (three to five centimeters) per year.

Explanation:

Answer:

1 to 2 inches (3 to 5 centimeters) per year

Explanation:

It depends on what plates your talking about, but in general, they move apart anywhere from 1 to 2 inches (3 to 5 centimeters) per year.

Specifically, though, The Arctic Ridge has the slowest rate (less than 2.5 cm/yr), and the East Pacific Rise near Easter Island, in the South Pacific about 3,400 km west of Chile, has the fastest rate (more than 15 cm/yr).

Answer:

[tex]K=4.07x10^{-4}[/tex]

Explanation:

Hello!

In this case, according to the given chemical reaction, it is possible to set up the equilibrium expression as shown below:

[tex]K=\frac{[CO]^4}{[Ni(CO)_4]}[/tex]

Since the nickel product is solid and is not included. It means that the concentrations at equilibrium of CO and Ni(CO)₄ are:

[tex][CO]_{EQ}=\frac{1.98g}{28.01g/mol} *\frac{1}{2.6L}=0.0272M[/tex]

[tex][Ni(CO)_4]_{EQ}=\frac{0.597g}{170.73g/mol} *\frac{1}{2.6L}=0.001345M[/tex]

Thus, there equilibrium constant for the reaction turns out to be:

[tex]K=\frac{(0.0272)^4}{[(0.001345)}\\\\K=4.07x10^{-4}[/tex]

Best regards!

Answer: The limiting reactant is  

Na

. The theoretical yield is 112 g  

NaCl

.

Explanation:

Explanation:

It is represented using the ideal gas equation , or PV = nRT, where P is the pressure in atmospheres, V is the volume in liters, n represents the quantity of particles in the container, T represents the temperature in Kelvin, and R is the ideal gas constant equal to 0.0821 liters atmospheres per moles Kelvin.

Answer:

The graph shown is not a function because points (-1,2) and (-1,0) have the same x value.

Explanation:

Answer:

20. ²⁴¹₉₅Am —> ²³⁷₉₃Np + ⁴₂He

21. ⁴²₁₉K —> ⁰₋₁β + ⁴²₂₀Ca

Explanation:

20. ²⁴¹₉₅Am —> __ + ⁴₂He

Let ⁿₘX be the unknown.

Thus, the equation becomes:

²⁴¹₉₅Am —> ⁿₘX + ⁴₂He

Next, we shall determine n, m and X. This can be obtained as follow:

241 = n + 4

Collect like terms

n = 241 – 4

n = 237

95 = m + 2

Collect like terms

m = 95 – 2

m = 93

Thus,

ⁿₘX => ²³⁷₉₃X => ²³⁷₉₃Np

Therefore, the complete equation is:

²⁴¹₉₅Am —> ²³⁷₉₃Np + ⁴₂He

21. __ —> ⁰₋₁β + ⁴²₂₀Ca

Let ʸₓZ be the unknown.

Thus, the equation becomes:

ʸₓZ —> ⁰₋₁β + ⁴²₂₀Ca

Next, we shall determine y, x and Z. This can be obtained as follow:

y = 0 + 42

y = 42

x = –1 + 20

x = 19

Thus,

ʸₓZ => ⁴²₁₉Z => ⁴²₁₉K

Therefore, the complete equation is:

⁴²₁₉K —> ⁰₋₁β + ⁴²₂₀Ca

aswer: protactinium-234 is more dang erous than uranium

There can be emissions of radiations like gamma radiation. There can be emission of particles too like alpha particle. Therefore protactinium-234 is more dangerous than uranium-234.

Nuclear decay is process in which the radioactive element releases particles or radiations. Alpha particles is ⁴₂He. Alpha particle is nothing but helium particle.  Protactinium-234 and uranium-234 are radioactive element.

If we were sitting near a gram of protactinium-234 and a gram of uranium-234, both solid materials then protactinium-234 is more dangerous than uranium-234. The half-life of protactinium-234 is smaller than that of uranium-234. So, protactinium-234 is more active than uranium-234 and hence more harmful than uranium-234.

Therefore, protactinium-234 is more dangerous than uranium-234.

To know more about nuclear decay, here:

https://brainly.com/question/21114779

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Answer:

O generation of winds

Explanation:

The uneven heating causes temperature differences, which in turn cause air currents (wind) to develop, which then move heat from where there is more heat (higher temperatures) to where there is less heat (lower temperatures). The atmosphere thus becomes a giant "heat engine", continuously driven by the sun.

Answer:

0.57 moles of carbon dioxide are required to produce 0.095 moles of glucose

Note: The question is not complete. The complete question is given below:

Green plants use light from the Sun to drive photosynthesis, a chemical reaction in which liquid water and carbon dioxide gas form aqueous glucose C6H12O6 and oxygen O2 gas. Calculate the moles of carbon dioxide needed to produce 0.095 mol of glucose. Be sure your answer has a unit symbol, if necessary, and round it to the correct number of significant digits

Explanation:

Photosynthesis is a chemical reaction in which liquid water and carbon dioxide gas chemically react to form the simple sugar glucose in aqueous form and oxygen gas using energy derived from sunlight. The balanced equation of photosynthesis is given below:

6 CO₂ + 6 H₂O ----> C₆H₁₂O₆ + 6 O₂

From the equation above, 6moles of carbon dioxide gas, CO₂ reacts with 6 moles of water molecules to produce 1 mole of glucose and 6 moles of oxygen gas. Thus, 6 moles of carbon dioxide are required to produce 1 mole of glucose.

0.095 moles of glucose will require 0.095 moles of glucose * 6 moles of CO₂/ 1 mole of glucose

Moles of CO₂ required = 0.57 moles of CO₂

Answer:

spines

Cacti have spines, which are also called needles or thorns. Spines are modified leaves or leaves that have changed. Spines do not dry out. Spines deter herbivores from consuming this plant.

Explanation:

hope this helps...

Answer: Tunneling underground to offer protection from predators and extreme temperatures.

Explanation: A behavioral adaptation aimed at attracting a mate. A physical adaptation that allows birds to catch prey. Modified leaves that protect a cactus from herbivores.