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2 years ago

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Chemistry

1 answer:

ivann1987 [24]2 years ago

8 0

The answer is D) The boy uses force to move the rock a distance

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X) = 3x - 13 g(x) = 2x2 - 4x-5 {x) = -4-7 6. Find (f- g(x).

Nastasia [14]

Answer:

sorry

Explanation:

don know

8 0

2 years ago

What characteristic do all living things share?

BARSIC [14]

All organisms share certain characteristics of life, for example, all living things are made of cells and they must reproduce to make the next generation. Without these characteristics, there is no life.

I hope i helped??

8 0

2 years ago

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A 5L sample of CO2 at 540 torr and 25 degrees celsius expands to 15L at 32 degrees celsius. What is the pressure of the new cont

saw5 [17]

By use of combined gas law
P2= T2P1V1/V2
v1=5L
P1=540 torr
T1=25+273=298k
V2=15 L
T2=32+273=305 k

P2 is therefore=( 305k x 540 torr x5 L) /( 15L x 298)= 184.23 torr

6 0

3 years ago

CH4 + 202 → CO2 + 2H2O How many grams of O2 needed to produce 36 grams of H2O?

Pavel [41]

Answer:

Mass = 64 g

Explanation:

Given data:

Mass of water produced = 36 g

Mass of oxygen needed = ?

Solution:

Chemical equation:

CH₄ + 2O₂ CO₂ + 2H₂O

Number of moles of water produced:

Number of moles = mass/molar mass

Number of moles = 36 g/ 18 g/mol

Number of moles = 2 mol

Now we will compare the moles of water and oxygen.

H₂O : O₂

2 : 2

Mass of oxygen:

Mass = number of moles × molar mass

Mass = 2 mol × 32 g/mol

Mass = 64 g

8 0

2 years ago

Carbon-14 undergoes radioactive decay in the reaction above. Determine the type of radiation emitted in this reaction and descri

Drupady [299]

Answer: The beta-particle is being released in the reaction and the nucleus is changing from to nitrogen.

Explanation:

Carbon-14 undergoes a radioactive decay by the process of beta-minus decay.

In beta-minus decay, a neutron gets converted to a proton and an electron.

The equation for the beta-minus decay of carbon-14 follows the reaction:

$_6^{14}\textrm{C}\rightarrow _7^{14}\textrm{N}+_{-1}^0\beta$

In this reaction beta-particle is being released carrying -1 charge. Another name for this particle is known as electron.

In this decay process, the nucleus is changing from carbon to nitrogen. The property of the nucleus is changing completely as number of protons is getting increased.

4 0

3 years ago

Read 2 more answers