1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
gayaneshka [121]
3 years ago
8

What happens to a line when the y-intercept is changed? Check all that apply.

Chemistry
1 answer:
tamaranim1 [39]3 years ago
5 0

Answer:

As the y-intercept increases, the graph of the line shifts up;

As the y-intercept decreases, the graph of the line shifts down

Explanation:

There are two ways to think about this problem. The first way would be the graphical approach:

  • if we only change the y-intercept, this means we keep the same slope;
  • y-axis is the vertical axis;
  • if we change the point at which the line crosses the y-axis, we either shift it upward for a higher y-intercept or downward for a lower y-intercept.

Now, thinking algebraically, a line has the following equation in a general form:

y = mx + b

The y-intercept is essentially obtained when x = 0, then:

y = b:

  • if we increase b value, the y value increases, so the graph shifts upward;
  • if we decrease b value, the y value decreases, so the graph shifts downward.
You might be interested in
Question 10 of 25
Over [174]

Answer: 0

Explanation: A P E X

5 0
3 years ago
Read 2 more answers
What does Hess's law state about the total enthalpy change for a reaction?OA. It depends on the reaction pathway.B. It can only
Dimas [21]
<h2>Answer:</h2>

Option D is correct. It is independent of the reaction pathway.

<h2>Explanations:</h2><h2>What is Hess's law?</h2>

Hesslaw states that the enthalpy change of a reaction does not change regardless whether the reaction takes place in a single or multiple reaction pathways.

This shows that the total entalpy change of a reaction does not depend on the reaction pathway.

8 0
1 year ago
Help me answer this chemistry question. thank you!
Vladimir [108]

Answer:

Noble gases

Explanation:

hope it helps

7 0
2 years ago
If 150 g dimethylhydrazine reacts with excess dinitrogen tetroxide and the product gases are collected at 127oC in an evacuated
zhuklara [117]

Answer : The the partial pressure of the nitrogen gas is 0.981 atm.

The total pressure in the tank is 2.94 atm.

Explanation :

The balanced chemical reaction will be:

(CH_3)_2N_2H_2(l)+2N_4O_4(l)\rightarrow 3N_2(g)+4H_2O(g)+2CO_2(g)

First we have to calculate the moles of dimethylhydrazine.

Mass of dimethylhydrazine = 150 g

Molar mass of dimethylhydrazine =60.104 g/mole

\text{Moles of dimethylhydrazine}=\frac{\text{Mass of dimethylhydrazine}}{\text{Molar mass of dimethylhydrazine}}

\text{Moles of dimethylhydrazine}=\frac{150g}{60.104g/mole}=2.49mole

Now we have to calculate the moles of N_2 gas.

From the balanced chemical reaction we conclude that,

As, 1 mole of (CH_3)_2N_2H_2 react to give 3 moles of N_2 gas

So, 2.49 mole of (CH_3)_2N_2H_2 react to give 2.49\times 3=7.47 moles of N_2 gas

Now we have to calculate the partial pressure of nitrogen gas.

Using ideal gas equation :

PV=nRT\\\\P_{N_2}=\frac{nRT}{V}

where,

P = Pressure of N_2 gas = ?

V = Volume of N_2 gas = 250 L

n = number of moles  N_2 gas = 7.47 mole

R = Gas constant = 0.0821L.atm/mol.K

T = Temperature of N_2 gas = 127^oC=273+127=400K

Putting values in above equation, we get:

P_{N_2}=\frac{(7.47mole)\times (0.0821L.atm/mol.K)\times 400K}{250L}=0.981atm

Thus, the partial pressure of the nitrogen gas is 0.981 atm.

Now we have to calculate the total pressure in the tank.

Formula used :

P_{N_2}=X_{N_2}\times P_T

P_T=\frac{1}{X_{N_2}}\times P_{N_2}

P_T=\frac{1}{(\frac{n_{N_2}}{n_T})}\times P_{N_2}

P_T=\frac{n_{T}}{n_{N_2}}\times P_{N_2}

where,

P_T = total pressure = ?

P_{N_2} = partial pressure of nitrogen gas = 0.981 atm

n_{N_2} = moles of nitrogen gas = 3 mole  (from the reaction)

n_{T} = total moles of gas = (3+4+2) = 9 mole  (from the reaction)

Now put all the given values in the above formula, we get:

P_T=\frac{9mole}{3mole}\times 0.981atm=2.94atm

Thus, the total pressure in the tank is 2.94 atm.

8 0
3 years ago
Name a property of liquids that they do not share with solids.​
neonofarm [45]
They flow and can take the shape of their container
5 0
3 years ago
Read 2 more answers
Other questions:
  • Dark silicates have a specific gravity of 3.2 to 3.6 and are composed primarily of silica tetrahedral and ________. Select one:
    14·2 answers
  • What does temperature measure?
    15·2 answers
  • a car is traveling 55.0 miles per hour . convert this to meters per second . one miles is equal to 1.61 km
    14·2 answers
  • Regarding the formula al2o3 which of the following is accurate
    15·1 answer
  • What are the important points that we consider before using chemical fertilizer?<br>​
    11·1 answer
  • Which salt is produced when sulfuric acid and calcium hydroxide react completely?
    15·2 answers
  • 5. If you evaluated 5 solvents as possible recystallization solvents do you think it is generally true that the solvent which ap
    10·1 answer
  • 1s22s22p?<br> 1.22<br> 2.22<br> 6
    14·1 answer
  • Help im stuck on this i dont understand
    10·2 answers
  • How many moles are in a 111.5 gram sample of sodium chloride, NaCl?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!