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AfilCa [17]
3 years ago
10

Predict the precipitate when the double replacement reaction occurs: Ca(NO3)2(aq) + Na2CO3(aq) →

Physics
2 answers:
taurus [48]3 years ago
8 0
Ca(NO3)2(aq) + Na2CO3(aq) → 2NaNO3 + CaCO3⬇. NaNO3 is solution so CaCO3 is the precipitate formed.
seropon [69]3 years ago
3 0

Answer:The precipitate formed is calcium carbonate.

Explanation:

double replacement reaction is the chemical reaction in which two reactant  exchanges their respective ions to give new substance as a product.

AB+CD→CB+AD

In a given reaction:

Ca(NO_3)_2(aq)+Na_2CO_3(aq)\rightarrow 2NaNO_3(aq)+CaCO_3(ppt)

When calcium nitrate reacts with sodium carbonate in aqueous they give white colored precipitate of calcium sulfate and aqueous solution of sodium nitrate.

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Hybrid seeds are deliberately crossbred for particular traits, such as growth pattern or disease resistance. They have been hand
Lena [83]

Answer:

Unlike heirloom seeds, if one saves a hybrid seed, one will not get the same plant again.

Explanation:

The statement that can be removed without affecting the reliability of overall paragraph is, "unlike heirloom seeds, if one saves a hybrid seed, one will not get the same plant again". <em>This is because even if we remove this line, the paragraph still looks completely understandable, reliable and in a flow.</em>

If we talk about hybrid plants, we know that they are produced through cross pollination of the crops with desired traits. Although they are sterile and cannot produce offspring, however the plants which are raised from these seeds are edible and quite healthy. This is why these plants have better yield and a better resistance against environmental constraints like diseases and stresses. After the production, hybrid seeds are stored and they are able to produce plants of similar types.

Hope it helps!

7 0
3 years ago
Burl the painter weighs 600 Newtons. He stands in the exact middle of his stage. There are two scale readings attached to the tw
chubhunter [2.5K]

Answer:

T = 300 N

Explanation:

As we know that the painter is standing at the middle of the scaffold

So here the two ropes will exert same tension on the scaffold

So we will have

T_1 + T_2 = W

also we know

T_1 = T_2

so we will have

2T = W

T = \frac{W}{2}

so tension is half of the weight in both the strings

So it is

T = 300 N

6 0
3 years ago
At what height from the surface of the earth does the value of acceleration due to gravity be 2.45 m/s square where the radius o
Citrus2011 [14]

Answer:

Explanation: RADIUS OF EARTH = 6400X1000m =

ACC DUE GRAVITY ABOVE SURFACE OF EARTH = g' =2.45 m/s^2

ACC DUE GRAVITY ON SURFACE OF EARTH =g= 9.8 m/s^2

A/C TO FORmULA

g'/g=1-2h/Re

g'/g +2h/Re = 1

2h/Re =1- g'/g

2h= (1- g'/g)Re

2h=(1-2.45 /9.8)

6400X1000

2h = (0.75)6400X1000

2h = 4800000

h= 2400000

m

3 0
2 years ago
How can you measure the distance an object has moved?
Naily [24]

You must observe the object twice.

-- Look at it the first time, and make a mark where it is.

-- After some time has passed, look at the object again, and
make another mark at the place where it is.

-- At your convenience, take out your ruler, and measure the
distance between the two marks.

What you'll have is the object's "displacement" during that period
of time ... the distance between the start-point and end-point. 
Technically, you won't know the actual distance it has traveled
during that time, because you don't know the route it took.


8 0
3 years ago
The process of combining two small nuclei into one nucleus of larger mass is called _____.
fiasKO [112]
The process of splitting one large nucleus into
smaller ones is nuclear fission.

The process of combining two small nuclei into
one larger one is nuclear fusion.
3 0
3 years ago
Read 2 more answers
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