Question 32(multiple choice worth 1 points) [01.04]what do scientists use to measure the mass of a substance? balance graduated cylinder measuring cup scale

Answers

Answer 1

Answer: has to be balance since the others are for volume

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If 62.0 grams of magnesium metal (Mg) react with 55.5 grams of oxygen gas (O2) in a synthesis reaction, how many grams of the excess reactant will be left over when the reaction is complete? Be sure to write out the balanced equation for this reaction and to show all of your work.
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A sample of gas has increased in temperature from 20° Celsius to 22° Celsius. Which of the following happens as the temperature of the gas goes up? The gas undergoes a phase change.
The velocity of the gas particles decreases.
The kinetic energy of the particles increases.
An exothermic reaction is more likely to occur.

Answers

The correct answer for this question is the statement 'the kinetic energy of the particles increases'. As the temperature of gas goes up, the kinetic energy of the particles increases because their velocities increase. This is because particles get excited and hit each other more - leading to increase in kinetic energy.

Answer: The kinetic energy of the particles increases.

Explanation:

Average kinetic energy is defined as the average of the kinetic energies of all the particles present in a system. It is determined by the equation:

$K=(3RT)/(2)$

From above, it is visible that kinetic energy is directly related to the temperature of the system. So, if temperature is increased, average kinetic energy of the system also increases.

Also the velocity of the particles also increase as $K.E=(1)/(2)* mv^2$ .

Write the balanced equation for the reaction given below: C2H6 + O2 --> CO2 + H2O. If 16.4 L of C2H6 reacts with 0.980 mol of O2, how many liters of carbon dioxide gas will be produced? What is the limiting reagent? How many oxygen atoms will be in this sample of carbon dioxide? How many moles of the excess reactant will be left over? How many grams of the excess reactant will be left over?

Answers

The balanced reaction: C2H6 + 7/2 O2 -> 2 CO2 + 3 H2O

We first convert volume of C2H6 to no. of moles. We use the conditions at STP where 1 mol = 22.4 L thus,

Moles C2H6 = 16.4 L/ 22.4 L =0.7321 mol

In order to determine the limiting reagent, we look at the given amounts of the reactants.

0.7321 mol C2H6 (7/2 mol O2 / 1 mol C2H6) = 2.562 mol O2

From the given amounts of the reactants, we can say that O2 is the limiting reactant since we need 2.562 mol O2 to completely react the given amount of C2H6. The excess reagent is C2H6

To calculate for the amount of products and excess reactants:

0.980 mol O2 (2 mol CO2 / (7/2 mol O2)) = 0.56 mol CO2 (22.4 L / 1 mol ) =12.544 L CO2
0.980 mol O2 (1 mol C2H6 / (7/2 mol O2)) = 0.28 mol C2H6
Excess C2H6 = 0.7321 mol - 0.28 mol C2H6 = 0.4521 mol C2H6

We then use the molecular weight of C2H6 to convert the excess amount to grams.

0.4521 mol C2H6 (30.08 g C2H6 / 1 mol C2H6) = 13.60 g C2H6

Since the limiting reagent is O2 there will be no oxygen atoms that will be left after the reaction.

An object has a weight of 5.10 Newtons (N) at sea level, where the acceleration due to gravity is 9.81 m/s2.What is the acceleration due to gravity on the object of it is placed in a space ship 1,000 km above sea level, where gravity exerts a force of 3.81 N on the object. F(newtons)=m(kg) x a(m/s2) Please show work.

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Well, you could get the mass as $m=(G_0)/(g_0)$ ad then $g_1=(G_1)/(m)$ , where $G_0$ is the sea level weight, $g_0$ the sea level accel., $g_1$ the accel. above while $G_1$ the weight above.

Answer:

Well, you could get the mass as m=\frac{G_0}{g_0} ad then g_1=\frac{G_1}{m}, where G_0 is the sea level weight, g_0 the sea level accel., g_1 the accel. above while G_1 the weight above

Explanation:

The material you should use in the windshield washer container is? usually a special windshield washing solution

Answers

The material you should use in the windshield washer container is a special windshield washing solution.

Using the wrong material in the windshield washer container can cause damage to the windshield and the washer system itself. A special windshield washing solution is specifically designed to clean the windshield effectively and safely, without leaving streaks or residue.

There are several types of special windshield washing solutions available in the market, each with its own set of benefits and features. Some of the most common types include:

1. Deionized water: This type of solution is distilled and purified to remove impurities and minerals that can leave streaks on the windshield. Deionized water is gentle on the windshield and the washer system, and it is effective in removing dirt and grime.

2. Isopropyl alcohol: This type of solution is a mixture of isopropyl alcohol and water. It is effective in removing dirt and grime, and it also helps to dry the windshield quickly. However, it can be too harsh on some types of windshields, so it is important to use it with caution.

3. Glycerin-based solution: This type of solution is made with glycerin, which is a natural humectant that helps to prevent the windshield from drying out. It is also effective in removing dirt and grime, and it leaves the windshield streak-free.

When choosing a special windshield washing solution, it is important to consider the type of windshield you have, as well as the climate and weather conditions in your area. For example, if you live in an area with high humidity, a glycerin-based solution may be the best choice, as it helps to prevent the windshield from fogging up.

It is also important to note that some special windshield washing solutions may not be compatible with certain types of windshields, such as those made of polycarbonate or acrylic. It is always a good idea to consult the manufacturer's instructions before using any solution in your windshield washer container.

In summary, the material you should use in the windshield washer container is a special windshield washing solution that is specifically designed for the type of windshield you have and the climate and weather conditions in your area. It is important to choose a solution that is gentle on the windshield and the washer system, and that is effective in removing dirt and grime.

Properties that make titanium useful for tennis rackets and wheelchairs

Answers

Answer:

light-weightiness, durability

Explanation:

Titanium is chemical element with symbol Ti and the atomic number of the element is 22.

Titanium is a transition metal with silver lusture. It possess low density, and high strength and also high tensile strength. Titanium is also resistant to corrosion in sea water.

Titanium is used in many sporting goods like tennis rackets, hockey, etc. Wheelchairs and the tennis rackets are better when they are lightweight, without being detracting from their quality.

Its durability, malleability, etc the basic properties of metals

What is the energy of a 3.12 x 10^18 s-1 wave?A. 4.75 x 10 ^42 J
B. 5.74 x 10^-7 J
C. 2.07 x 10 ^15 J
D. 8.6 x 10 ^ 4 J

Answers

Among electromagnetic waves, UV rays are most dangerous because exposure to these radiation cause serious problems in living organism. The energy of wave is 2.08×10⁻¹⁵J.

What is electromagnetic wave?

Electromagnetic wave is a wave which contain two component one is electric component and other is magnetic component. The electric and magnetic component are perpendicular to each other. There are so many wave that comes under electromagnetic wave like infrared wave , radio wave .There is a relation between energy of wave. frequency of wave

Mathematically,

E=hv

where,

E = energy of electromagnetic wave

h is planks constant having value 6.67×10⁻³⁴js

v= frequency of wave

substituting the given values

E= 6.67×10⁻³⁴js×3.12 x 10¹⁸ s⁻¹

E= 2.08×10⁻¹⁵J

Therefore the energy of wave is 2.08×10⁻¹⁵J.

To know more about electromagnetic wave, here:

brainly.com/question/12289372