why would it have been a bad idea to plant 100 seeds in your plant experiment?

Answer:

the sun

Explanation:

Answer:

+375.2 KJ.

Explanation:

The balanced equation for the reaction is given below:

H₂ + F₂ —> 2HF ΔH = +536 KJ

From the balanced equation above,

2 moles of HF required +536 KJ .

Finally, we shall determine the heat required to produce 1.4 mol of hydrogen fluoride, HF. This is illustrated below:

From the balanced equation above,

2 moles of HF required +536 KJ .

Therefore, 1.4 moles of HF will require = (1.4 × 536)/2 = +375.2 KJ

Thus, +375.2 KJ of heat energy is required.

Answer:

charge of copper.. ........mark me brainlest

Answer:

it is magnesium and barium and calcium

Magnesium, Barium, and Calcium will bond ionically with chlorine such that the formula would be written as MgCl₂,  BaCl₂, and  CaCl₂.

Ionic compounds can be explained as crystalline solids which are formed by packing of opposite charge ions due to the interactions of the ions. An Ionic compound is produced when metal reacts with non-metal.

In ionic compounds, oppositely charged ions are held by ionic bonds due to the interactions between ions. The ions are formed from atoms by gaining or losing electrons in order to attain their noble gas configuration.

A cation in ionic compounds is the electropositive ion and has the tendency to give away valence electrons. Similarly, anions in ionic compounds are electronegative ions and have a tendency to gain electrons.

The chlorine needs one electron to complete its valence shell. Therefore two chlorine will combine with a divalent cation. Therefore Magnesium, Barium, and Calcium exist as Mg⁺², Ba²⁺ , and Ca²⁺.

Learn more about ionic compounds, here:

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Answer:

I hope this will help you....and please mark me as Brilliant

Explanation:

1 moles N2 you can produce 2 moles of NH3, (see equation)

5 mol N2 gives 10 mole NH3

molar mass of NH3 = 17.03 g/mole

10 moles NH3 is 10 * 17.03 gram = 170.3 gram NH3.

Balanced equation:

N2(g) + 3 H2(g) → 2 NH3(g)

Answer:

ok let me study into this first

Explanation:

I'll answer this in a few

Answer:

Maas of sodium sulphate produced = moles×molar mass=0.06×142=8.52 gmoles\times molar\ mass=0.06\times 142=8.52\ gmoles×molar mass=0.06×142=8.52 g

Explanation:

Reaction between them is given by-

2NaOH  +H2SO4 → Na2SO4  +2H2O2NaOH\ \ +H_2SO_4\ \to\ Na_2SO_4\ \ +2H_2O2NaOH  +H2​SO4​ → Na2​SO4​  +2H2​O

Molar mass of H2SO4=98 g mole−1H_2SO_4=98\ g\ mole^{-1}H2​SO4​=98 g mole−1

Moles of sulphuric acid taken = 5.8898=0.06 mole\frac{5.88}{98}=0.06\ mole985.88​=0.06 mole

Moles of sodium hydroxide taken = 6.240=0.155 mole\frac{6.2}{40}=0.155\ mole406.2​=0.155 mole

here sulphuric acid is limiting agent so

reaction will proceed according to sulphuric acid

0.06 mole HSO4 will produce same amount of  Na2SO40.06\ mole\ H_SO_4\ will \ produce\ same\ amount\ of \ \ Na_2SO_4\\0.06 mole HS​O4​ will produce same amount of  Na2​SO4​

Answer:

lol

Explanation:

Answer:

I think its B maybe

Explanation:

Answer:

Electrons

Explanation:

Answer:

disagree it wont be the same momentum

Explanation:

cuh

Answer:

is a measure of how much light that hits a surface is reflected without being absorbed.

Explanation:

it is the measure of the diffuse reflection of solar radiation out of the total solar radiation and measured on a scale from 0, corresponding to a black body that absorbs all incident radiation, to 1, corresponding to a body that reflects all incident radiation

Answer:

The proportion of the incident light or radiation that is reflected by a surface, typically that of a planet or moon.

Answer:

i feel like it would be four

Explanation:

Srr if i was wrong

Answer:

0.72 mole of oxygen would produce 320.4 kJ of heat.

Explanation:

CH₄ (g) + 2O₂ (g) → CO₂ (g) + 2H₂O (ℓ) + 890kJ

According to the equation,

2 moles of O₂ produces 890 kJ of heat

So, 0.72 moles of O₂ will produce:

Therefore, 0.72 moles of oxygen would produce 320.4 kJ of heat.

Answer: The volume of solution is 200 ml

Explanation:

Molarity of a solution is defined as the number of moles of solute dissolved per liter of the solution.

[tex]Molarity=\frac{n\times 1000}{V_s}[/tex]

where,

n = moles of solute

[tex]V_s[/tex] = volume of solution in ml

moles of [tex]NaCl[/tex] = [tex]\frac{\text {given mass}}{\text {Molar mass}}=\frac{45.045g}{58.5g/mol}=0.77mol[/tex]

Now put all the given values in the formula of molality, we get

[tex]0.154=\frac{0.77\times 1000}{V_s}[/tex]

[tex]V_s=\frac{0.154\times 1000}{0.77}=200ml[/tex]

Therefore, the volume of solution is 200 ml

Answer:

Cosimo

Explanation:

Answer:

Mg2+ and Ca2+

Explanation:

Hard water are water that happen to contain salts of calcium and magnesium ions. They can occur as chlorides, sulphates, bicarbonates etc. Hard water wastes soap as it requires an above normal amount to form lathers.

The metallic ions are;

Mg2+ and Ca2+

Answer:

5 moles of Sodium are required to produce 5 moles of Sodium Chloride.

Explanation:

I am assuming you were not given an equation and this is a synthesis reaction.

Let's begin by writing a balanced chemical equation for the synthesis of sodium chloride.

2Na⁺ + Cl₂⁻ -> 2NaCl

Since Cl₂ exists as a diatomic molecule, we must have 2 +1 charges from Na to balance out the 2 -1 charges of Cl₂ (-1 for each Cl atom). This will then form 2 moles of NaCl.

To produce 5 moles of sodium chloride, we can multiply the entire equation by 2.5. This will result in:

5Na⁺ + 2.5Cl₂⁻ -> 5NaCl

The stoichiometric ratios of this new equation is:

5 Na: 2.5 Cl₂: 5NaCl

5 moles of sodium (Na) are required to produce 5 moles of sodium chloride (NaCl).

Answer:

2HCL

Explanation:

Both the elements have 2 so when placing the 2 infront ,it'll distribute/ apply to both

Answer:

No

Explanation:

Gelatin is a substance that makes jello, and a fruit cup is a cup full of fruit

Answer:

no

Explanation:

Answer:

100.87°C

Explanation:

This is about elevation of boiling point, one of the colligative properties.

Formula is:

Boiling T° of solution - Boiling T° of pure solvent = Kb . m . i

Kb is the boiling constant.

m means molality (mol/kg of solvent)

i = numbers of ions dissolved.

Our solute is C₂H₆O₂. As it is an organic compound, no ion is generated, so i = 1.

We determine moles of solute: 125 g . 1mol /62g = 2.02 moles.

We determine molality = 2.02 mol / 1.2 kg → 1.68 m.

Boiling T° of solution - 100°C = 0.52°C/m .  1.68m  . 1

Boiling T° of solution = 0.52°C/m .  1.68m  . 1 + 100°C →  100.87 °C

We often denote oxygen as 16O8 where 16 is the mass number and 8 is the atomic number.

number of neutrons=16-8=8

Answer:

387.62, 83.33%

Explanation:

Given:

[tex]C_{12} H_{22} O_{11}(aq) + H_2O(g) -4 C_2H_5OH(1) + 4 CO_2(g)[/tex]

720g of Sucrose produces 323g ethanol.

To calculate the theoretical yield, you can use a mole-to-mole ratio. Assuming that there is excess H2O, you can calculate the theoretical yield like so:

[tex]720g C_{12}H_{22}O_{11}*\frac{1 mol C_{12}H_{22}O_{11}}{342.3g} *\frac{4mol C_2H_5OH}{1mol C_{12}H_{22}O_{11}} *\frac{46.07g}{1molC_2H_5OH} =387.62g[/tex]

An easy way to find percent yield is

[tex]\frac{Actual }{Theoretical} *100[/tex]

So, plug the numbers in.

[tex]\frac{323.0}{387.62} *100 = 83.33%[/tex]

So, the percent yield is 83.33%.

Answer:

D! :)

Explanation:

Answer:

Due to the limited supply of oxygen, carbon (ii) oxide, a poisonous gas, is produced instead of carbon(iv) from the burning charcoal stove and this may result in death when inhaled.

Explanation:

When charcoal is burnt in a plentiful supply of oxygen, the combustion products is carbon (iv) oxide (carbon dioxide) which is not very toxic to the human body. The equation of the reaction is given below:

C + O₂ ----> CO₂

However, in a limited supply of oxygen gas, the combustion product is carbon  (ii) oxide. The equation of the reaction is given below:

2C + O₂ ----> 2CO

Carbon (ii) oxide is a colorless and odorless gas which unlike carbon (iv) oxide is very toxic to human and results in fatality when inhaled in even small doses for a few minutes. Its mechanism of action of toxicity is that it competes with oxygen for transport in the body by hemoglobin. It combines irreversibly with hemoglobin to form carboxyhemoglobin, thereby depriving tissues and cells the oxygen they need. This results in death of the cells and tissues as well as of the whole organism. Thus, it is not advisable to light a charcoal stove in limited supply of oxygen.

Answer:

A chemical change is a permanent change. A Physical change affects only physical properties i.e. shape, size, etc. ... Some examples of physical change are freezing of water, melting of wax, boiling of water, etc. A few examples of chemical change are digestion of food, burning of coal, rusting, etc.

Explanation:

Answer:

She breached the feudal customs of the time, which hindered women's rights, by working to educate herself in subjects such as astronomy, mathematics, geography, and medicine. She was well known for her contributions in astronomy, mathematics, and poetry.  Zhenyi was a famous female scientist from the Qing dynasty.

Hope this helps have a good day. :)

Answer:

If the molecules are heated further, the liquid water will become water vapor, which is a gas. Gas particles have more energy and are on average at distances from each other which are much larger than the size of the atoms/molecules themselves.