The mc002-1.jpgHrxn of formation of carbon dioxide is negative. Which statement is true?

Answers

Answer 1

Answer:

When the formation of carbon dioxide is negative, it means that it releases heat to the surroundings. When it releases heat to the surroundings, the reaction is exothermic.

Related Questions

Megan wants to see if mice that are fed food A or B grow at a faster rate. She measures the mass of the mice on day 1, then divides them into two groups based on the type of food they will be given. She feeds each group the same amount of food at the same time each day. Does Megan have a control group in this experiment?
A particle with velocity v(t)=1/t−3, in m/s, moves in a straight line. Its initial displacement is known to be s(1)=1, in m. Find the position function s(t).
An Earth satellite in orbit emits a radio signal of constant frequency. Compared to the emitted frequency, the frequency of the signal received by a stationary observer will appear to be:a) higher as the satellite approachesb) higher as the satellite moves awayc) lower as the satellite approachesd) unaffected by the satellite's motion
A student pushes a box across a rough horizontal floor. If the amount of work done by the student on the box is 100 J and the amount of energy dissipated by friction is 40 J, what is the change in kinetic energy of the box
a ball is thrown upward at 25 m/s from the ground. what is the average velocity and average speed of the ball after 5 seconds?

Aspace walking astronaut has become detached from her spaceship! She’s floating in space with her handy tool belt attached to her waist, thinking about how she might get back to the ship, which she can see 50m from her current location. How can she get back to the ship? Use the language from the laws of motion in your answer.What can she do with the tool belt?

What will that action cause her body to do? Why?

Which of Newton’s Laws applies to this situation?

Write a paragraph which incorporates all of the above information.

Answers

Answer:

In order to get back to the ship, the astronaut must throw the belt in the opposite direction the spaceship.

From Newton's third law of motion:

For every action, there is equal and opposite reaction.

In order to throw the belt away, astronaut would apply some force which cause same amount of force acting on her body in the opposite direction which would take her towards the spaceship.

Uranium 235 can be split if it is hit by: a neutron a proton an electron a neutrino

Answers

if splitting uranium 234, it's nuclear fission, right?
so neutron

this answer for this is neutron

An object has a density of 20 g/cm 3 . When placed in a cylinder, it displaces 5 mL of water. What is the mass of the object?

Answers

Note 1mL = 1cm³

5mL = 5cm³.

If it displaces 5mL of water which is equivalent to 5cm³, then its volume is also 5cm³

Density = Mass / Volume

20 g/cm³ = Mass / 5 cm³

Mass = 20 g/cm³ * 5 cm³

Mass = 100 g.

Answer:

100grams

Explanation:

Why is the cosmic background radiation uneven in some places?

Answers

Answer:

There is more space between our galaxy and distant galaxies, and the whole universe is expanding. ... Red shift shows that the galaxies are moving away from each other. Why is the cosmic background radiation uneven in some places? Matter was not spread out evenly in the early universe.

Answer:

matter just wasn't spread out evenly in our universe after 400,000 years.

Explanation:the cmbr picture was as it was 400,000 years after the big bang it still looks the same as it does today though.when early galaxy's started to form they spread the radiation out unevenly with there gravity.

You want to set up an aquarium and need to determine what size tank to buy. The graph shows tank sizes using a rule that relates the capacity of the tank to the combined lengths of the fish it can hold.If you want four 2-inch platys, three 1-inch guppies, and a 3-inch loach, what is the smallest capacity tank you can buy?

17-gallon tank
13-gallon tank
15-gallon tank
14-gallon tank

Answers

The minimum volume of the tank required for combined lengths of the fish is $\boxed{15\,{\text{gallons}}}$ .

Further Explanation:

The graph between the capacity of the tank and the combined length of the fishes present in the tank starts from the point $\left( {0,1} \right)$ and further it passes through the point $\left( {3,4} \right)$ .

The expression for the slope of the graph is as given below.

$m = \frac{{{y_2} - {y_1}}}{{{x_2} - {x_1}}}$

Substitute the co-ordinates of the points in equation of slope.

$\begin{aligned}m&= \frac{{4 - 1}}{{3 - 0}}\n&= (3)/(3)\n&= 1\n\end{aligned}$

The y-intercept of the graph is $1$ .

Write the expression for the equation of line of the graph.

$y = mx + c$

Substitute $1$ for $m$ and $1$ for $c$ in above expression.

$\begin{aligned}y&= \left( {1 \cdot x} \right) + 1 \hfill\ny&= x + 1 \hfill\n\end{aligned}$

The total length of all the fishes present inside the tank is.

$\begin{aligned}{L_(total)} &= \left( {4 * 2} \right) + \left( {3 * 1} \right) + \left( {1 * 3} \right) \n&= 8 + 3 + 3\n&= 14\,{\text{inches}}\n\end{aligned}$

Since the length of the fishes is given on the x-axis, substitute $14\,{\text{inches}}$ for $x$ in equation of line of the graph.

$\begin{aligned}y&= 14 + 1\n&= 15\,{\text{gallons}}\n\end{aligned}$

Thus, the minimum volume of the tank required for combined lengths of the fish is $\boxed{15\,{\text{gallons}}}$ .

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Answer Details:

Grade: High School

Chapter: Units and Measurements

Subject: Physics

Keywords: Aquarium, size of tank, capacity of the tank, combined lengths, the fish, platys, guppies, loach, inch, smallest capacity, gallon.

connexus unit 8 lesson 1 PRACTICE!

1) B

2) C

3) A

4) C

5) B

6) A

7) D

8) A

9) D

10) A

11) A

12) C

13) D

14) C

15) B

16) B

Hope this helps you guys out!

Which of the following is not a unit of pressure? a. atmosphere b. psi c. N/m^2 d. mm of mercury e. pascal f. They are all units of pressure.

Answers

Answer:

(A) Atmosphere.

Explanation:

The atmosphere is a thing, not a unit of measurement. (this is the simplified version)

Pls mark brianlist

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