What happens in a chemical reaction?
A
Substances change in appearance but not in chemical composition.

B
Substances change from solid to liquid or gas.

C
Substances interact to form one or more new substances.

D
New atoms are created or destroyed.

Answer:

true

Explanation:

plucking and abrasion

abrasion is when a glacier scrapes rocks below and plucking is when sediments are picked up by a glacier

Answer: ion dipole

Explanation: ck-12 said it was correct

Answer:

A control is important for an experiment because it allows the experiment to minimize the changes in all other variables except the one being tested.

Explanation:

do u mean that kind of control

Answer Van der Waals Forces

Explanation:

right on EDGE 2021

Gecko's feet easily adhere to the wall and floor by the Van der Waals forces of attraction between the surface and its feet. Thus option d is correct.

Van der Waals force is a kind of intermolecular attractive force between two particles which is comparatively weaker than other forces like dipole force, covalent and ionic force.

Because of the minute hair-like projections on the underside of their feet, geckos are renowned for being skilled climbers. Studies revealing that they are coated with an ultra-thin layer of lipid molecules in an upright orientation.

Each of those minuscule hairs, known as setae, breaks off into hundreds of even smaller bristles, or spatulae. It has long been understood that the so-called van der Waals forces, or the attractive and repulsive forces between two dipole molecules, become important at microscopic size scales.

To find more on intermolecular forces, refer here:

https://brainly.com/question/17111432

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Explanation:

At convergent plate boundaries two plates are moving towards one another and different scenarios are in play.

Most importantly, at these margins the crust is being destroyed.

Some of the features found at this margin include, oceanic trenches, accretionary wedges, volcanic islands, earthquakes

Answer:

150.1 mL

Explanation:

Step 1: Given data

Step 2: Calculate the volume of the sample of benzene

Density is an intrinsic property. It is equal to the quotient between the mass and the volume of the sample of benzene.

ρ = m/V

V = m/ρ

V = 131.9 g/(0.879 g/mL)

V = 150.1 mL

Answer:

1.44

Explanation:

Science happened in my brain

Answer:

3.125%

Explanation:

After 1 half life it remains 50%

After 2 half lines it remains 25%

After 3 half lines it remains 12.5 %

After 4th half life it remains 6.25%

After 5th half life it remains 3.125%

Answer: When the spring is recoiling

Explanation:

Answer:

When the spring is recoiling

Explanation:

Answer:

ocean waves are converted to electricity with wave energy converter, or WEC, devices. ... The surface portion moves faster than the submerged part, and the WEC converts that relative motion into electricity

The energy in ocean waves that should be transformed into electrical energy is because of Buoyant objects.

Buoys and turbines should be considered as the two examples of devices that can be used to capture the energy from the ocean's movement.

Buoys are considered to be structures that float on the sea and move up and down with the motion of the waves.

Learn more about energy here; https://brainly.com/question/17172186

Answer:

[tex]r=0.0341\frac{M}{s}[/tex]

Explanation:

Hello!

In this case, considering the given table, we are able to represent the symbolic rate law as shown below:

[tex]r=k[BF_3]^m[NH_3]^n[/tex]

Thus, by using the following steps, we can find both m (BF3 order of reaction) and n (BF3 order of reaction):

- Experiment 1 and 2 for the calculation of n:

[tex]\frac{r_1}{r_2}=\frac{k[BF_3]_1^m[NH_3]_1^n}{k[BF_3]_2^m[NH_3]_2^n}[/tex]

So we plug in to obtain:

[tex]\frac{0.2130}{0.1065}=\frac{k*0.250^m*0.250^n}{k*0.250^m*0.125^n}\\\\2=\frac{0.250^n}{0.125^n}\\\\2=2^n\\\\log(2)=n*log(2)\\\\n=1[/tex]

So the order of reaction with respect to NH3 is 1.

- Experiment 3 and 4 for the calculation of m

[tex]\frac{r_3}{r_4}=\frac{k[BF_3]_3^m[NH_3]_3^n}{k[BF_3]_4^m[NH_3]_4^n}[/tex]

So we plug in to obtain:

[tex]\frac{0.0682}{0.1193}=\frac{k*0.200^m*0.100^n}{k*0.350^m*0.100^n}\\\\0.57=0.57^m\\\\log(0.57)=m*log(0.57)\\\\m=1[/tex]

So the order of reaction with respect to BF3 is also 1.

Now, we can compute the rate constant by solving for it on any of the experiments there, say experiment 1:

[tex]k=\frac{r_1}{[BF_3][NH_3]} =\frac{0.2130M/s}{0.250M*0.250M}\\\\k=3.41M^{-1}s^{-1}[/tex]

Thus, the initial reaction rate for the 0.50M BF3 and 0.020M NH3 is:

[tex]r=3.41M^{-1}s^{-1}*0.50M*0.020M\\\\r=0.0341\frac{M}{s}[/tex]

Best regards!

Answer:

The answer is "35 atoms".

Explanation:

The Formula for isopropyl alcohol is: [tex]C_3H_8O[/tex]

In 1 molecule of [tex]C_3H_8O[/tex] = 8 atoms of hydrogen  

In 4 molecule of = atoms of hydrogen

According to the given formula [tex]C_3H_7O[/tex]

In 5 molecule of [tex]C_3H_7O[/tex] [tex]= 5 \times 7 = 35[/tex] atoms of hydrogen.

Answer:

This region of thick, hot crust and mantle extends 1,300 kilometers north and south of the Iceland hotspot and some 1,000 kilometers north and south of the Azores hotspot. Together, the two hotspots appear to be feeding a huge supply of magma to nearly the entire northern segment of the Mid-Atlantic Ridge.

Explanation:

please give me a heart

Answer:

Easter island

Answer:

See explanation

Explanation:

An initiation step is the first step in a free radical mechanism. In this step, free radicals are generated from a stable compound. The initiation step tends to increase the concentration of radicals present in the system.  It leads to a net increase in the number of free radicals in the system.

For the chlorination of 2,2-dimethylpropane, the initiation step is;

Cl2 + hv --------->2Cl.

Note that hv is used to represent light

i think its volume but im not 100% sure

Answer:

D.

Explanation:

cuz liter is volume

Answer:

Hate 2 break it 2 u foo but there's no option for me 2 choose....

Answer:

Percent error for beaker A is 0.26%

Percent error for beaker B is 0.25%

Explanation:

The remaining part of the question is shown in the attachment below.

For beaker A

Mass of water = 9.997 g

Volume = 10mL

First, we will determine the experimental density

From

Density = Mass / Volume

∴ Density = 9.997g / 10mL

Density = 0.9997 g/mL

To calculate the percent error

Percent error = (Error/True value) × 100%

Error = Experimental value - True value

From the question, True value = 0.99707 g/mL

Experimental value = 0.9997 g/mL

∴ Error = 0.9997 g/mL - 0.99707 g/mL

Error = 0.00263 g/mL

Then,

Percent error = (0.00263/0.99707) × 100%

Percent error = 0.26377%

Percent errror ≅ 0.26%

Hence, percent error for beaker A is 0.26%

For beaker B

Mass of water = 9.9956 g

Volume = 10mL

Also, we will first determine the experimental density

From

Density = Mass / Volume

∴ Density = 9.9956g / 10mL

Density = 0.99956 g/mL

To calculate the percent error

Percent error = (Error/True value) × 100%

Error = Experimental value - True value

True value = 0.99707 g/mL

Experimental value = 0.99956 g/mL

∴ Error = 0.99956 g/mL - 0.99707 g/mL

Error = 0.00249 g/mL

Then,

Percent error = (0.00249/0.99707) × 100%

Percent error = 0.24973%

Percent errror ≅ 0.25%

Hence, percent error for beaker B is 0.25%

Answer:

The answer is C or 3 which ever but it that one

Explanation:

Answer:

0.78 g of acetylene.

Explanation:

The equation of the reaction is;

CaC2(s) + 2H2O (l) ------> Ca(OH)2(aq) + C2H2(g)

We have been told that CaC2 is the limiting reactant.

Number of moles of CaC2 = 2g/ 64 g/mol = 0.03 mol

If 1 mole of CaC2 yields 1 mole of acetylene

0.03 moles of CaC2 yields 0.03 moles of acetylene

Mass of acetylene = number of moles * molar mass

Molar mass of acetylene = 26 g/mol

Mass of acetylene =  0.03 moles * 26 g/mol

Mass of acetylene = 0.78 g of acetylene.

Answer:

We want to express it in scientific notation.

Answer:

no they do not

Explanation:

Answer:

It's just...Hair grown there...i guess it just grows as a male humans would

Explanation:

hope this helps.

290 g Na₂O

Math

Pre-Algebra

Order of Operations: BPEMDAS

Chemistry

Atomic Structure

Step 1: Define

4.7 mol Na₂O

Step 2: Identify Conversions

Molar Mass of Na - 22.99 g/mol

Molar Mass of O - 16.00 g/mol

Molar Mass of Na₂O - 2(22.99) + 16.00 = 61.98 g/mol

Step 3: Convert

Step 4: Check

Follow sig fig rules and round. We are given 2 sig figs.

291.306 g Na₂O ≈ 290 g Na₂O

Answer:

Cccccccccccccccccccccccccccccccccccccccccccc

Answer:

[tex]\mathbf{H_2SeO_{4(aq)} + 3SO_{2(aq)} + 2H_2O_{(l) } \to Se_{(s)} + 3H_2SO_{4(aq)} }[/tex]

Explanation:

We are to write a balanced equation from the information given above by including the states of their matter according to SATP conditions;

[tex]\mathbf{H_2SeO_{4(aq)} + 3SO_{2(aq)} + 2H_2O_{(l) } \to Se_{(s)} + 3H_2SO_{4(aq)} }[/tex]

From above;

The oxidizing agent is [tex]\mathbf{H_2SeO_{4(aq)} }[/tex]

The reducing agent is [tex]\mathbf{SO_{2(aq)} }[/tex]

Answer:

chemical

Explanation:

Answer:

It is refracted out, B

Explanation:

When the light travels through the prism, it refracts the colors out of it. In which a rainbow sort coloration is released from the other side.

Answer:

Explanation:

Refraction of light waves