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3 years ago

True or false: when hydrochloric acid is dissolved in water the reaction produces carbonand oxygen?

1 answer:

8 0

That has to be FALSE.
Without knowing anything about chemistry, I just notice that
neither Hydrochloric acid (HCl) nor water (H₂O) has any Carbon
in it. So in a reaction between them, there's nowhere to get
any Carbon from.

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If F1 = 390 N and F2 = 550 N , determine the angle θ(0∘≤θ≤180∘) between them, so that the resultant force has a magnitude of FR

Nadya [2.5K]

Answer:

Explanation:

R² = F₁² + F₂² + 2F₁F₂ Cosθ , R is resultant force , θ is angle between them

780² = 390² + 550² + 2 x 390 x 550 Cosθ

608400 = 152100 + 302500 + 429000 Cosθ

Cosθ = .3585

θ = 69 degree.

5 0

3 years ago

The acceleration due to gravity on Mars is 3.60 m/s2. if this is measured at a distance of 3.4 x 10^6 m from the center of the p

densk [106]

As we know that acceleration due to gravity is given by

$g = \frac{GM}{r^2}$

here we know that

g = 3.60 m/s^2

M = ?

$r = 3.4 \times 10^6 m$

now we have

$3.60 m/s^2 = \frac{(6.67 \times 10^{-11} Nm^2/kg^2)(M)}{(3.4 \times 10^6)^2m^2}$

$M = 6.24 \times 10^{23} kg$

so above is the mass of Mars

8 0

3 years ago

Which reaction takes place in a nuclear fission reactor?

anzhelika [568]

Answer:

Last option in the list of possible answers, with U235 and n (neutron) in the left (originators) of the reaction diagram.

Explanation:

Uranium 235 (which is a fissile isotope of uranium) plus slow neutrons is what produce the chain reaction that feeds nuclear reactors.

3 0

3 years ago

Kamal, Kamala, Krishna invert a sum of RS= 30,000 on a business in the ratio 2 : 3 : 5. Find the each of their investment.

Crazy boy [7]

Here's the solution,

Let the shares be 2x, 3x and 5x according to their shared investment ratio,

now, we know :

=》2x + 3x + 5x = 30000

=》10x = 30000

=》x = 3000

So, value of x = 3000

hence, the share of each shareholder is :

kamal = 2x = 6000
kamala = 3x = 9000
Krishna = 5x = 15000

i hope it helped.....

3 0

3 years ago

Read 2 more answers

A bag is dropped onto the street from the roof of a 32 m high building. How long does it take for the bag to fall?

gizmo_the_mogwai [7]

Answer:

Explanation:

h = ½at²

t = √(2h/a)

t = √(2(32)/9.8)

t = 2.5555062... 2.6 s

4 0

3 years ago