1. A cupcake show makes and delivers specialized cupcakes. It will cost someone $30 for
10 cupcakes and $67.50 for 25 cupcakes. This total includes the cost per cupcake and
delivery fee. How much does each cupcake cost? (enter your answer with just the number,
no $ sign)

Answer:

Arrow B

Explanation:

Cooled in ice to help the water vapour condense. Tube 2 – contains lime water, goes cloudy to show the presence of carbon dioxide. Word equation: (hydrocarbon + oxygen → carbon dioxide + water) Methane + oxygen → carbon dioxide + water.

Answer:

0.502mol

Explanation:

The balanced chemical equation of the reaction described in this question is as follows:

2KClO3 → 2KCl+ 3O2

According to the equation above, 2 moles of KClO3 will produce 2 moles of KCl.

Using mole = mass/molar mass to convert mass of KClO3 to moles

Molar mass of KClO3 = 39 + 35.5 + 16(3)

= 39 + 35.5 + 48

= 122.5g/mol

mole = 61.5 g ÷ 122.5g/mol

mole = 0.502mol

Since 2 moles of KClO3 will decompose to produce 2 moles of KCl.

0.502 mol of KClO3 will decompose to produce 0.502 × 2/2

= 0.502mol of KCl.

Answer:

wdym??

Explanation:

Answer:

wdym by water, soil, temperature, space?

Answer:

72g

Explanation:

The balanced equation of the reaction between Magnesium (Mg) and hydrochloric acid (HCl):

Mg(s) + 2HCl(aq) → MgCl2(aq) + H2(g)

Based on this equation, 1 mole of Mg needs to react with 2 moles of HCl.

Hence, 6 moles of HCl will need to react with 6 × ½ = 3 moles of Mg.

Using the formula; mole = mass/molar mass

Molar mass of Mg = 24g/mol

3 = mass/24

mass = 72g.

Answer:

Benthos: crabs, starfish, lobsters, stingrays,, algae

Plankton: diatom, tubeworms

Nekton: whales, sharks, turtles,

Explanation:

Answer:

C. Endothermic

Explanation:

Since the products potential energy is higher than the reactants potential energy, it has abosrbed energy, thus making the graph endothermic.

Answer:

So originally, the plum pudding model by J.J Thomson is electrons (negatively charged) held in place by a proton (positively charged) cloud.

Alpha particles are positively charged made of 2 protons + 2 neutrons.

Rutherford's experiment where they beamed those positively charged alpha particles demonstrated that an atom was not a uniform cloud, instead the alpha particles that were deflected was the positively charged nucleus. The alpha particles would also pass through if it didn't hit the nucleus, or be slightly attracted to the negative charge on the electrons. But the overall idea is that Rutherford's experiment changed what the structure of the atom was by discovering that they have a positively charged nucleus due to the deflection of positively charged alpha particles.

Answer:

0.28M H2SO4

Explanation:

The molarity of a solution is defined as the ratio between the moles of the solute (In this case, H2SO4) and its volume in liters.

In the problem, the volume of the solution is increased from 125mL to 250mL. That means the solution is diluted:

250mL / 125mL = 2 times.

As the solution is diluted 2 times, the concentration is decreased in 2, that is:

0.56M / 2 =

Answer:

depends on how much jelly u like

Answer:

The answer is below

Explanation:

Certain countries like Germany under Adolf Hitler favored military solutions to the great depression because the government felt that having a mass production of military weapons and recruitment of unemployed people or citizens into the army would change the dire situation.

On the other hand, countries like the United States did not favor the military solutions but instead choose the NEW DEAL under Franklin D Roosevelt; the reason could be linked to their democratic culture, the isolation belief tendency.

Answer:

See Explanation

Explanation:

A biosphere is a zone of life found on earth. Since the artificial biosphere has all the elements that support and sustain human life, then there must also be soil in the artificial biosphere.

If that is the case, then we can engage in massive tree planting. Trees take in carbon dioxide and release oxygen. Hence if a large number of trees are planted all over the artificial biosphere, the trees will eventually produce large enough oxygen to support human life overtime.

Answer:

Filtration and evaporation

Explanation:

A mixture of sand, pink sugar and water can be separated by filtration and evaporation.

The pink sugar is already dissolved in the water but the sand remains undissolved in the water hence it can be filtered off. The filtrate now contains the sugar.

The sugar is obtained from the filtrate by evaporation of the solution to yield the solid pink sugar and steam which can be condensed again to give liquid water.

Answer: a plant cell

Explanation:

Answer:

[tex]2Zn+PbCl_4\rightarrow 2ZnCl_2+Pb[/tex]

Explanation:

Hello there!

In this case, when referring to single replacement reactions, it is crucial for us to figure out the formula of the starting reactants; thus, we know zinc is Zn and lead (IV) chloride is PbCl₄. In such a way, the reaction proceeds as follows:

[tex]Zn+PbCl_4\rightarrow ZnCl_2+Pb[/tex]

Which must be balanced as shown below:

[tex]2Zn+PbCl_4\rightarrow 2ZnCl_2+Pb[/tex]

Regards!

Answer:

n=4

Explanation:

n= (154.75×28.40)÷(68.45×18)

n=3.5

n=4(approximately)

Answer:

a

Explanation:

me say so

Answer:

C

Explanation:

Answer:

Deduce the balanced chemical equation:

CaCO3(s) + 2HCl(aq) > CaCl2 + H2O(l) + CO2(g)

2. Write as ionic species:

Ca2+(aq) + CO3 2- (aq) + 2H+ + 2Cl- > Ca2+(aq)+ 2Cl-(aq) + H2O(l) + CO2(g)

3. Identify ions on the right that also appear on the left, and eliminate them. (As Robert Cruikshank says, these are known as ’spectator ions’ and take no overall part in the reaction):

CO3 2- (aq) + 2H+(aq) > H2O(l) + CO2(g)

This is the balanced ionic equation.

Answer:

D. Exothermic

Explanation:

The enthalpy, ΔH, of a reaction is defined as the change in heat when a reaction occurs.

A reaction with ΔH > 0 is called endothermic and requires energy to be produced

A reaction with ΔH < 0 is called exothermic and produce energy when occurs (An example is the combustion of octane that produce energy that is used in engines to produce movement)

As the enthalpy of the reaction is -1207kJ/mol (ΔH < 0) the reaction is:

Answer:

One atom of each element is made up of protons, neutrons, and electrons. The number of electrons determines how an element reacts. The number of protons gives the element its identity. ... They react well with nonmetals because they can easily give up electrons to form ions.

Answer:

pressure=force / volume

5.8÷3.9

=1.5 ml

The heat is evolved when 24.9 g of propanol (C3H7OH) is burned is 834.15 J

To solve this question,  First, we need to find the number of moles present in 24.9 g of propanol.

⇒ Formula

⇒ Where:

From the question,

⇒ Given:

⇒ Substitute these values into equation 1

⇒ Finally the heat evolved is

Hence, The heat evolved when propanol is burned is 834.15 J

Learn more about heat here: https://brainly.com/question/21222010

Answer:please see explanation for answers

Explanation:

Water conservation is an approach geared towards controlling how water is used. Because of the ever growing population, which weighs so much on water available to mankind,Over negligence and abuse of our water resources have been a great point of concern, that is why the need for the knowledge of water conservation is preached.

Now, some of the ways we can conserve water include

1. Putting off taps while lathering the hands with soap

2.use of irrigation system to water crops and plants

3.. while brushing, make sure to turn off the tap or faucet

4. use a shower rather than a bath

Answer:

Explanation:

Each particle, or corpuscle, of water is a regular icosahedron (20-sided geometrical solid). This is what water particles look like, according to Plato's description in the Timaeus. In the center is the water-particle Plato describes at 55b, with 6 scalene triangles making up each equilateral face of the icosahedron

Answer:

A air

Explanation:

Air is a mixture but not compound. Its constituents can be separated. For example: oxygen, nitrogen etc. by physical process.

Answer:

The line with spikes and semicircles is a stationary front, it brings days of steady rain.

Explanation:

L means Low pressure, it brings stormy weather with strong winds.

H means High pressure, it brings fair weather and light winds.

The line with spikes is a cold weather front, it brings thunderstorms and colder

temperatures.

The line with spikes and semicircles is a stationary front, it brings days of steady rain.

Answer:

T2 = 547.2K

Explanation:

Given:

V1 = 135 ml. V2 = 250 ml

T1 = 295.5K. T2 = ?

Using Charles's law and solving for T2,

V1/T1 = V2/T2

T2 = (V2/V1)T1

= (250 ml/135 ml)(295.5K)

= 547.2K (or 273.2°C)

Answer:

Later when they are older

Explanation:

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