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3 years ago

A person's _ changes as he travels from the earth to space, but his _ remains the same.

Chemistry

2 answers:

irina1246 [14]3 years ago

6 0

Answer: weight , mass

Explanation:

Mass is defined as the amount of matter contained in a body. It is measured in units of kg, g and mg.

Weight of an object is the force acting on an object by virtue of its mass.

weight= $m\times g$

m = mass

g = acceleration due to gravity

As the value of g keeps changing from earth to space, the weight of the person would also keep changing. The mass of the person will remain same .

EleoNora [17]3 years ago

4 0

A persons weight changes as he travels from earth to space but his mass remains the same

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The measure of gravity on Earth determines our __________.

kirza4 [7]

The correct answer are:

#1. The measure of gravity on earth determines our weight

#2. The closer an object is to the center of earth, the greater the gravitational force on that object.

#3. Objects in a free fall are constantly picking up speed as they fall back to earth is true.

Brainliest please!

6 0

3 years ago

Methane burns in the presence of oxygen to form carbon dioxide and water.

wlad13 [49]

Answer:

= 9.28 g CO₂

Explanation:

First write a balanced equation:

CH₄ + 2O₂ -> 2H₂O + CO₂

Convert the information to moles

7.50g CH₄ = 0.46875 mol CH₄

13.5g O₂ = 0.421875 mol O₂

Theoretical molar ratio CH₄:O₂ -> 1:2

Actual ratio is 0.46875 : 0.421875 ≈ 1:1

If all CH₄ is used up, there would need to be more O₂

So O₂ is the limiting reactant and we use this in our equation

Use molar ratio to find moles of CO₂

0.421875 mol O₂ * 1 mol CO₂/2 mol O₂=0.2109375 mol CO₂

Then convert to grams

0.2109375 mol CO₂ = 9.28114 g CO₂

round to 3 sig figs

= 9.28 g CO₂

5 0

3 years ago

PLEASE HELP!!! ILL GIVE YOU BRAINLIEST!!!!

saul85 [17]

Answer:

Explanation:

It would be A. because the question is asking how the harmful chemicals have an effect on the environment. This answer also proves that even though we don't mean to harm the environment it still happens because we are using these chemicals for things in our daily life.

8 0

3 years ago

What causes a change in a rocks compostion

son4ous [18]

Weathering i believe

5 0

3 years ago

HURRY!!!! TIMED!!! WILL GIVE BRAINLIST!!!

aev [14]

Explanation:

(a) write a balanced equation for the reaction

CaCO3 + HCl --> CaCl2 + H2O + CO2

The balanced equation is given as;

CaCO3 + 2HCl → CaCl2 + H2O + CO2

(b) when the reaction was complete, 800 mL of carbon dioxide gas was collected. How many moles of calcium carbonate were used in the creation?

From the balanced reaction;

1 mol of CaCO3 reacts to produce 1 mol of CO2

1 mol of CO2 = 22.4 L of CO2

This means;

1 mol of CaCO3 reacts to produce 22.4L of CO2

x mol would produce 800ml (0.8 L) of CO2

1 = 22.4

x = 0.8

x = 0.8 * 1 / 22.4 = 0.0357 mol

Mass = Number of moles * Molar mass

Molar mass of CaCO3 = 100.0869 g/mol

Mass = 0.0357 mol * 100.0869 g/mol = 3.57 g

(d) If there was another contaminant in the sample that was not un reactive, would this have caused the percent yield of carbon dioxide to be higher, lower, or the same, explain your answer.

The same

An un reactive contaminant in the sample is most likely a catalyst. Catalysts only affect the rate of reaction. They do not affect yields of products.

7 0

2 years ago

A person's _____ changes as he travels from the earth to space, but his _____ remains the same.

A person's _ changes as he travels from the earth to space, but his _ remains the same.