A rectangular solid has a square face with 5 cm sides and a length of 10 cm. Find the volume of the solid in cm3 .
a
360 cm3
b 250 cm
C 90 cm3
d 160 cm

Answer:

Los modelos deben basarse en principios científicos sólidos.

Explanation:

Espero que esto ayude!

A 1317 mg dose of niacinamide, there are 3.27 x 10²² carbon atoms.

Niacinamide, also known as vitamin B3, is an organic molecule that is nitrogen-containing and derived from niacin. It gets into our metabolic pathways as coenzymes in the forms of NAD and NADP.

This substance is found in Nicomide, an acne treatment, and is used by some individuals as a nutritional supplement to treat high cholesterol.

The molar mass of niacinamide, the molecular formula of niacinamide, and Avogadro's number. Avogadro's number is 6.022 x 10²³, The molar mass of niacinamide is 123.11 g/mol.

The number of moles in 1.317 g of niacinamide using the formula: moles = mass / molar mass. moles = 1.317 g / 123.11 g/mol= 0.0107 moles. he number of atoms present in the niacinamide, we must use Avogadro's number.

The molecular formula for niacinamide is C₆H₆N₂O. There are 6 carbon atoms in this molecule because C₆H₆N₂O means there are 6 carbon atoms.

Multiply the number of moles by Avogadro's number to get the number of molecules, and then multiply that by the number of atoms in the molecule.

Thus, 0.0107 mol x 6.022 x 10²³ / mol x 6 atoms / molecule = 3.27 x 10²² carbon atoms. Therefore, in a 1317 mg dose of niacinamide, there are 3.27 x 10²² carbon atoms.

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Answer:

Explanation:

Start by restating the question.

So how is the crumple zone rigidity, crumple zone deformation , and the maximum force of the dummy similar, and how are they different?

The crumple zone increases, the crumple zone deformation increases then decreases then repeated in increasing and decreasing , and the maximum force decreases. Hope that helps!

Mg is ahead of Al in the electrochemical series and more reactive than Al hence Al does not react with MgCl2.

A chemical reaction is said to have occurred when new substances are formed. The reaction between magnesium chloride  solution and sodium carbonate solution is a double decomposition reaction since the cations exchange anion partners in the product;

MgCl2(aq) + Na2CO3(aq) ------> MgCO3(s) + 2NaCl(aq)

We must note that a single replacement reaction depends on the relative positions of metals in the electrochemical series. Al can react with CuCl2 because Al is more reactive than copper and ahead of Cu in the electrochemical series. On the other hand, Mg is ahead of Al in the electrochemical series and more reactive than Al hence Al does not react with MgCl2.

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Answer:

10.5g/cm³

Explanation:

Since the density of the silver is 10.5g/cm³, any pure sample of silver will have the same value as the density of silver.

Density is the mass per unit volume of a substance.

Answer:

Disturbance

Explanation:

I believe it is Disturbance because waves are normally caused by wind, and wind classifies as Disturbance.

Therefore, the total number of hydrogen atoms will be equal to 3 × 13 = 39.

Now, we can place all the hydrogen atoms in the given compound as follows:

We have 39 hydrogen atoms which are placed in the above structure at appropriate positions.

The molecular formula of the given compound is C13H2F3.

We are required to place all the hydrogens present in the compound. So, let's count the number of hydrogen atoms in the given compound.

Number of hydrogen atoms in the compound = 2 × 13 + 3 = 29.

Now, let's place all the hydrogens present in the compound.

The compound has 13 carbon atoms, and each carbon atom forms four bonds.

Out of these, one bond is with the fluorine atom and the rest three bonds are with the hydrogen atoms.

So, we can place 3 hydrogen atoms per carbon atom.

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Answer:

C D

Explanation:

NOAA airplanes continuously transmit measurements of pressure, humidity, temperature, and wind direction and speed as they fall toward the sea, providing a detailed look at the structure of the storm and its intensity.

Answer:

The purpose of the experiment is to see how water of different temperature and salinity affect the density.

Explanation:

Temperature and salinity directly affect the density of the water. Water of low temperature is more dense than water of high temperature, BUT, (fresh)water with no salt is less dense than (sea)water with more salt, so temperature and salinity change density of water.

Answer:

Please post the answers for the other questions on my page!! I will give you brainiest!! Please :(

Explanation:

a. Decreasing alpha from 0.05 to 0.01 makes the significance level more stringent. You will be less likely to reject the null hypothesis, even when it's false. This increases the probability of a Type II error, thus potentially reducing the power of the test. The power curve will shift to the left.

b. If the sample size is reduced from 90 to 50, the effect on the power curve is that it will also shift towards the left.

The power curve is a graph that shows the probability of rejecting the null hypothesis as a function of the true value of the mean.

In the given scenarios of this study, Reducing the significance level and reducing the sample size will shift the power curve to the left, indicating a decrease in the statistical power of the test.

The power of a statistical test is the probability that it correctly rejects the null hypothesis when the alternative hypothesis is true.

a) Reducing alpha from 0.05 to 0.01 means that we are more stringent in our assessment of whether the new treatment is effective.

This will result in a decrease in the power of the test, meaning that it is less likely that we will be able to detect a difference between the new treatment and the previous treatment.

b) If the sample size is reduced from 90 to 50, the effect on the power curve is that it will also shift towards the left.

This is because a smaller sample size decreases the power of the test. A larger sample size provides more information and thus makes it more likely to correctly reject the null hypothesis when the alternative hypothesis is true.

Therefore, by reducing the sample size, you are decreasing the likelihood of detecting a true effect if one exists, thus reducing the power of the test.

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Explanation:

A chemical change in a changes that leads to formation new product or chemical substance having new qualities both physical and chemical.

Therefore, chemical changes can be

1. Gas Production

2. Substances Dissolve to form new substance or solution.

3. Heat is Released is a chemical change.

4. Bubbling occurs.

Rest all are examples of physical changes.

Acetylcholine acts on preganglionic neurons in the sympathetic and parasympathetic systems of the autonomic nervous system to govern a variety of processes within the autonomic system. Thus, it is true.

Muscles. Drugs that affect acetylcholine can have varying degrees of movement disturbance or even paralysis because this neurotransmitter is crucial for muscular function.

This neurotransmitter functions to activate muscles in the peripheral nervous system and is a key component of the autonomic nervous system.

Therefore, it is true that Acetylcholine serves as the neurotransmitter in the peripheral nervous system that carries messages from motor nerves to skeletal muscles.

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Acetylcholine acts on neurons in the sympathetic and parasympathetic systems of the autonomic nervous system to govern a variety of processes within the autonomic system. Thus, it is true.

Muscles. Drugs that affect acetylcholine can have varying degrees of movement disturbance or even paralysis because this neurotransmitter is crucial for muscular function.

This neurotransmitter functions to activate muscles in the peripheral nervous system and is a key component of the autonomic nervous system.

Therefore, it is true that Acetylcholine serves as the neurotransmitter in the peripheral nervous system that carries messages from motor nerves to skeletal muscles.

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A single electron is present in the valence shell of sodium shown.

What is a valence shell?

In chemistry and physics, the valence electron is an electron that is part of the outer shell of an atom. When the outer shell is open, the valence electron can participate in the formation of a chemical bond. Each atom in a bond contributes a valence electron and forms a common pair in a single covalent bond. The valence shell of an atom refers to its outermost orbit or shell. These electrons are necessary for creating bonds between atoms. It can be filled whole or in part.

So, as you can see from the diagram, we see that there is only one electron in the valence shell.

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Answer:

there are 4 sulfur atom.

Answer:

We don't know what solvent X and solvent Y are, but from the chart, we can see that in solvent X, hydrochloric acid can conduct electricity (bulb lights up), and react with calcium carbonate.

So, we can say the electrical conductivity when HCl is dissolved in solvent X is high, and when HCl is dissolved in solvent Y, the electrical conductivity is low (because light bulb doesn't light up).

Additionally, in solvent X, HCl ionizes, this shows the property of acids: reacts with carbonates to give CO2 (because CO2 reacts with lime water to make it cloudy).

In solvent Y, HCl does not ionize, so there is no reaction between acid and calcium carbonate.

Millikan's "oil drop" apparatus allowed for the determination of the charge of an electron. The apparatus was used to measure the charge on a single electron by observing the motion of charged oil droplets in an electric field.

The "oil drop" experiment was conducted by introducing charged oil droplets into a chamber with a known electric field. By varying the electric field, Millikan was able to measure the amount of charge required to balance the gravitational force acting on the droplet. The charge on the droplet was calculated by observing the rate at which the droplet fell under the influence of gravity and the electric field.

Millikan's "oil drop" experiment is considered a significant contribution to the development of modern physics. It was the first time the charge of a single electron was accurately measured and confirmed the existence of subatomic particles. The results of the experiment provided a better understanding of the nature of electrons and contributed to the development of quantum mechanics.

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The gas sample is Cl₂. Answer A.

The ideal gas equation formula PV = nRT

Calculating the number of moles of the gas sample.

PV = nRT

1.04 × 1.365 = n × 0.0821 × 368

1.4196 = n × 30.21

n = 1.4196 ÷ 30.21

n = 0.04699 mol

The formula for mass and number of moles m = n × Mr

Calculating the molar gas from the sample

Mr = m ÷ n
Mr = 3.33 ÷ 0.04699

Mr = 70.9 g/mol

From the info given, gas Cl₂ has the same molar mass as the sample.

So, the gas sample is Cl₂, chlorine gas.

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This problem is providing information about the volume and concentration of HCl as 505 mL and 0.160 M respectively, and it is asking for the water that have to be added to prepare a 0.100-M solution.

In such a way, we work over the assumption of constant moles in dilution processes, so that we are able to write:

\(M_1V_1=M_2V_2\)

Which relates de volume and concentration at the beginning and end of the experiment. This means we can solve for the resulting volume of the solution as a first calculation:

\(V_2=\frac{M_1V_1}{M_2}\\\\V_2=\frac{0.160M*505mL}{0.100M}=808mL\)

Hence, the following amount of water must be added:

\(V_w=808mL-505mL=303mL\)

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Answer: Argon, neon, and xenon are examples of noble gases.

The noble gases (Group 18), which are found at the far right of the periodic table,Argon, neon, and xenon are examples of  noble or inert gases.

A gas is said to be inert if it does not easily undergo chemical reactions with other chemicals and does not easily produce chemical compounds as a result. The noble gases, formerly known as the inert gases, frequently do not react with a wide variety of substances.

Any one of the seven chemical elements that compose Group 18 (VIII a) of the periodic table is referred to as a noble gas. Helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), radon (Rn), and oganesson are the constituent elements (Og).

Due to their filled valence shells (octets), which render them incredibly nonreactive, the noble gases (Group 18), which are found at the far right of the periodic table, were formerly known as the "inert gases."

Thus, Argon, neon, and xenon are examples of  noble or inert gases.

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Let us take our minds back to the kinetic theory of matter. Recall that the particles that compose matter are in constant random motion and the solids are arranged in a definite pattern while the particles of a gas are in random motion.

As such, the zinc has its atoms in a fixed pattern while the hydrogen atoms are roaming freely in the gaseous state.

Given that;

Amount of the acid = 10.95 g/36.5 g/mol = 0.3 moles

Amount of the zinc = 1g/65 g/mol = 0.015 moles

Given the reaction equation; \(Zn(s) + 2HCl(aq) ------ > ZnCl_{2} (aq) + H_{2}(g)\)

1 mole of Zn reacts with 2 moles of acid

0.015 moles of zinc reacts with x moles of acid

x =0.015 moles * 2 moles / 1 mole

= 0.03 moles

Thus, the zinc is the limiting reactant.

1 moles of the zinc produces 1 mole of the hydrogen

The amount of the hydrogen produced =  0.03 moles * 2 g/mol

= 0.06 moles of hydrogen

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A gas is placed in a rigid container that does not change volume. If heat is added to the container then the Kinetic Energy of gas increases.

Kinetic Energy of gas increases on addition of heat in a container if heat is added in the closed system.

Since, the container is rigid and there is no possibility of any change in the volume.

Volume of gas increases when the temperature of system rises but since the container is rigid according to the specified condition, hence volume change is negligible.

So, addition of heat the volume of gas cannot change. So, the Kinetic energy of the gas molecules increases on addition of heat which increases its temperature thereby leading to a change in the kinetic energy.

Kinetic Energy of gas increases on increase of temperature whenever there is no scope for the change of volume.

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Answer:-8

Explanation:

edmentum

The solution for the given linear equation can be solved by simplifying the equation. The value of x is obtained as - 8.

Linear equations are the equations which shows a linearity with a second expression which is similar to the first but having different mathematical operations and signs.

By solving linear equations we can solve for the unknown value of x. The value of x can be obtained by taking the whole expression to one side and which is having a constant value.

Given, - 3x + 7x - 8 = 34 + 9x -2.

          = 4x - 8 = 32 + 9x

          = 4x - 8 - 9x = 32

             -5x = 40

              x = - 40/5 = - 8.

Hence, solution of the given equation is  -8.

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If we assume that helium acts as an ideal gas, we can calculate that 1.000 mol of it will take up 3.43 L, which is 6.53 times less than its volume at standard conditions.

Assuming that helium behaves like an ideal gas in both cases, we can calculate the volume at 2.20 K using the ideal gas equation:

PV = nRT

P - the pressure exerted by the gas (0.05256 atm)

V - the volume of the gas

n - number of moles of the gas (1.000 mol)

R - universal gas constant (0.08206 L*atm/K*mol)

T - temperature (2.20 K)

If we rearrange the equation, we get:

V = nRT/P

Now we plug in the known values:

V = 1.000 mol * 0.08206 L*atm/K*mol * 2.20 K / 0.05256 atm

V = 3.43 L

At standard conditions (273 K, 1 atm), 1 mol of an ideal gas has a volume of 22.4 L, so the volume at described conditions is 22.4 L / 3.43 L = 6.53 times smaller than at standard conditions.

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Answer:

A.The energy an object has due to its motion

Answer:

100.44 oC (0.438 oC increase in BP)

Explanation:

Answer:

the third one

Explanation:

When you breathe in, you inhale oxygen and exhale carbon dioxide