3 years ago

I need help please. can someone please help me

Mathematics

1 answer:

lubasha [3.4K]3 years ago

7 0

Answer:

Step-by-step explanation:

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When calcium metal (Ca) reacts with oxygen gas (O2), it produces the ionic compound calcium oxide (CaO). Write the balanced equa

Vanyuwa [196]

Step-by-step explanation:

Hey there! Down here :D

$\bf{Ca + O_2 \longrightarrow CaO}$

Now , let's balance it by Multiplying 2 on Calcium Side.

$\sf{2Ca + O_2 \longrightarrow 2CaO}$

Is the Required Equation.

Hope it helps :)

<h3>Redox Reaction: Is it?</h3>

Yes, this is because:-

$\sf{2Ca + O_2 \longrightarrow 2CaO}$

Here, Calcium acts as Reducing Agent
And Oxygen is oxidizing agent.
And also, Cao gets oxidized.

It is also a Combination reaction.

$\sf{A + B \longrightarrow AB}$

Here A is Calcium
Here B is Oxygen.

6 0

4 years ago

A model car travels around a circular track with radius 5 feet. Let Z denote the distance between the model car and a fixed poin

Eddi Din [679]

Answer:

$\frac{dZ}{dt}$ = $\frac{40}{\sqrt{545} }$ , so the model car is moving away from the fixed point at a rate of approximately 1.7 feet per second.

Step-by-step explanation:

The functions x and y satisfy (x−20)^2+y^2=25 and differentiating gives 2(x−20)dx/dt+2y dy/dt=0. Substituting the three known values and solving for dy/dt yields dy/dt=−32. Since Z=x^2+y^2−−−−−−√, dZ/dt=(2x ^ dx/dt+2y^dy/dt) / 2x2+y2√. Substituting Since Substituting for x, y, $\frac{dx}{dt}$ , and $\frac{dy}{dt}$ gives $\frac{dZ}{dt}$ = $\frac{40}{\sqrt{545} }$ ,