A significant limitation for early scientists studying the elements was

Suppose we have the following pizza recipe:

Dmitriy789 [7]

Answer:

we required 15 ounce tomato sauce for 3 pizza

Explanation:

Given data:

Crust = 4

Cheese = 10 cups

number of ounces of tomato sauce for 3 pizza = ?

Solution:

Recipe and ingredients for one pizza:

1 crust + 5 ounce tomato sauce + 2 cups cheese → 1 pizza

Ingredients required for 3 pizza;

1 × 3 crust + 5 ×3 ounce tomato sauce + 2×3 cups cheese → 3 pizaa

3 crust + 15 ounce tomato sauce + 6 cups cheese → 3 pizaa

So we required 15 ounce tomato sauce for 3 pizza.

7 0

4 years ago

A sample of gas occupies 300 mL at 100K. What is its volume when the

iris [78.8K]

If the temperature of the sample of gas increases to the given value, the volume also increases to 600mL.

<h3>What is Charles's law?</h3>

Charles's law states that "the volume occupied by a definite quantity of gas is directly proportional to its absolute temperature.

It is expressed as;

V₁/T₁ = V₂/T₂

Given the data in the question;

Initial temperature of gas T₁ = 100K

Initial volume of gas V₁ = 300mL

Final temperature T₂ = 200K

Final volume V₂ = ?

V₁/T₁ = V₂/T₂

V₂ = V₁T₂ / T₁

V₂ = ( 300mL × 200K ) / 100K

V₂ = 60000mLK / 100K

V₂ = 600mL

Therefore, if the temperature of the sample of gas increases to the given value, the volume also increases to 600mL.

Learn more about Charles's law here: brainly.com/question/12835309

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3 0

2 years ago

Consider the following reaction: 2CH3OH ---> 2CH4+O2 delta H= +252.8kJ. Calculate the amount of heat transferred when 22.0g o

nydimaria [60]

To calculate the amount of heat transferred when an amount of reactant is decomposed, we must look at the balanced reaction and its corresponding heat of reaction. In this case, we can see that 252.8 kJ of heat is transferred per 2 moles of CH3OH used. When 22 g of CH3OH is used, 86.9 kJ is absorbed.

4 0

3 years ago

The isotope 90_Sr has a half-life of 28.8 years. What is the activity, measured in atoms/second of a 50 mg sample of "Sr? (10 pt

blsea [12.9K]

Answer:

$2.5523\times 10^{11} atoms/seconds$ is the activity, measured in of a 50 mg sample of 90-Sr.

Explanation:

Half life of the 90-Sr , $t_{1/2}= 28.8 years$

Activity coefficient of the 90-Sr = $\lambda$

$\lambda =\frac{0.693}{28.8 years}=0.0240625 year^{-1}$

Mass of 90-Sr = 50 mg = 0.050 g

Molecular mass of 90-Sr = 90 g/mol

Moles of 90-Sr = $\frac{0.050 g}{90 g/mol}=0.0005555 mol$

Number of atom in 0.0005555 moles of 90-Sr:

$0.0005555 mol\times 6.022\times 10^{23} mol^{-1}=3.3455\times 10^{20} atoms$

$\lambda =0.0240625 year^{-1}=\frac{0.0240625}{3.154\times 10^7 s}=7.6292\times 10^{-10} s^{-1}$

1 year = $3.154\times 10^7 seconds$

Activity measured in atoms per seconds:

= Number of atoms × $\lambda$

$=3.3455\times 10^{20} atoms\times 7.6292\times 10^{-10} s^{-1}$

$=2.5523\times 10^{11} atoms/s$

5 0

3 years ago

The alkane with six carbon atoms is called hexane. butane. butene. heptane. none of these choices is correct.

Mkey [24]

Option(A) is the correct answer.

The alkane with six carbons is called hexane.

<h3>What are the potential hazards of hexane?</h3>

Hexane is used as a special-purpose solvent, a cleaning agent, and to extract edible oils from seeds and vegetables. Humans who are acutely (short-term) inhaled high quantities of hexane have moderate central nervous system (CNS) symptoms such giddiness, nausea, headache, and dizziness. Humans who are exposed to hexane in the air <u>over an extended period of time</u> may develop polyneuropathy, which manifests as numbness in the extremities, muscle weakness, impaired vision, headaches, and tiredness. Rats have also displayed neurotoxic consequences. Hexane's potential to cause cancer in both humans and animals is unknown. Hexane has been categorized by the EPA as Group D, not classifiable as a human carcinogen.

To learn more about alkanes:

brainly.com/question/4260635

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7 0

2 years ago